<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019e421a-8fe3-7c12-bac0-fbb0e744b9ab,g:acbb2618-c390-49d7-a273-577f8c8d4875-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:arcroleRef arcroleURI="https://xbrl.org/2023/arcrole/summation-item" xlink:type="simple" xlink:href="https://www.xbrl.org/2023/calculation-1.1.xsd#summation-item"/>
  <link:roleRef roleURI="http://www.am.com/role/CondensedConsolidatedBalanceSheets" xlink:type="simple" xlink:href="aii-20260630.xsd#CondensedConsolidatedBalanceSheets"/>
  <link:calculationLink xlink:role="http://www.am.com/role/CondensedConsolidatedBalanceSheets" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019e421a-90b2-73e3-8f91-9187116238fd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockValue_019e421a-90b2-745c-a858-df03468d10b0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockValue"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_019e421a-90b2-73e3-8f91-9187116238fd" xlink:to="loc_us-gaap_CommonStockValue_019e421a-90b2-745c-a858-df03468d10b0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapital_019e421a-90b2-709c-9fbb-1ae2630a518f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdditionalPaidInCapital"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_019e421a-90b2-73e3-8f91-9187116238fd" xlink:to="loc_us-gaap_AdditionalPaidInCapital_019e421a-90b2-709c-9fbb-1ae2630a518f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_019e421a-90b2-7f04-bac4-d3b0230524b4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_019e421a-90b2-73e3-8f91-9187116238fd" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_019e421a-90b2-7f04-bac4-d3b0230524b4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_019e421a-90b2-7935-a308-12f4ce41daad" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_019e421a-90b2-73e3-8f91-9187116238fd" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_019e421a-90b2-7935-a308-12f4ce41daad" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_019e421a-90b2-7a3b-ab60-6a86cfca9026" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesAndStockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_019e421a-90b2-7abc-96c5-ce9a5e331640" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Liabilities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_019e421a-90b2-7a3b-ab60-6a86cfca9026" xlink:to="loc_us-gaap_Liabilities_019e421a-90b2-7abc-96c5-ce9a5e331640" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019e421a-90b2-7d33-b558-d47b80372d31" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquity"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_019e421a-90b2-7a3b-ab60-6a86cfca9026" xlink:to="loc_us-gaap_StockholdersEquity_019e421a-90b2-7d33-b558-d47b80372d31" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Investments_019e421a-90b2-74aa-b6b1-4670411b6319" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Investments"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermInvestments_019e421a-90b2-70e1-bbab-f28d89bc573c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShortTermInvestments"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Investments_019e421a-90b2-74aa-b6b1-4670411b6319" xlink:to="loc_us-gaap_ShortTermInvestments_019e421a-90b2-70e1-bbab-f28d89bc573c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_019e421a-90b2-7bd3-aa68-835012ed29ba" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Investments_019e421a-90b2-74aa-b6b1-4670411b6319" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_019e421a-90b2-7bd3-aa68-835012ed29ba" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_019e421a-90b2-7b4f-8c93-f365232d06d2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Assets"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Investments_019e421a-90b2-7dbd-98f5-0f91a78c8ad3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Investments"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019e421a-90b2-7b4f-8c93-f365232d06d2" xlink:to="loc_us-gaap_Investments_019e421a-90b2-7dbd-98f5-0f91a78c8ad3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_019e421a-90b2-7d3a-b38f-a75b4cefdec2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019e421a-90b2-7b4f-8c93-f365232d06d2" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_019e421a-90b2-7d3a-b38f-a75b4cefdec2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalents_019e421a-90b2-77ab-90ca-082bf847b227" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestrictedCashAndCashEquivalents"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019e421a-90b2-7b4f-8c93-f365232d06d2" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalents_019e421a-90b2-77ab-90ca-082bf847b227" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PremiumsReceivableAtCarryingValue_019e421a-90b2-7a6a-8190-3245dcdb6914" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PremiumsReceivableAtCarryingValue"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019e421a-90b2-7b4f-8c93-f365232d06d2" xlink:to="loc_us-gaap_PremiumsReceivableAtCarryingValue_019e421a-90b2-7a6a-8190-3245dcdb6914" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedInvestmentIncomeReceivable_019e421a-90b2-7c73-b789-88b5d339489e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccruedInvestmentIncomeReceivable"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019e421a-90b2-7b4f-8c93-f365232d06d2" xlink:to="loc_us-gaap_AccruedInvestmentIncomeReceivable_019e421a-90b2-7c73-b789-88b5d339489e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidReinsurancePremiums_019e421a-90b2-7ee2-80ae-9a22906c377d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PrepaidReinsurancePremiums"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019e421a-90b2-7b4f-8c93-f365232d06d2" xlink:to="loc_us-gaap_PrepaidReinsurancePremiums_019e421a-90b2-7ee2-80ae-9a22906c377d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_aii_IncomeTaxesRecoverable_019e421a-90b2-72b3-981a-a59c826582c7" xlink:href="aii-20260630.xsd#aii_IncomeTaxesRecoverable"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019e421a-90b2-7b4f-8c93-f365232d06d2" xlink:to="loc_aii_IncomeTaxesRecoverable_019e421a-90b2-72b3-981a-a59c826582c7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_aii_ReinsuranceRecoverableNet_019e421a-90b2-7cc8-8db8-2205b14f7964" xlink:href="aii-20260630.xsd#aii_ReinsuranceRecoverableNet"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019e421a-90b2-7b4f-8c93-f365232d06d2" xlink:to="loc_aii_ReinsuranceRecoverableNet_019e421a-90b2-7cc8-8db8-2205b14f7964" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_aii_DeferredPolicyAcquisitionCostsNetOfCedingCommissions_019e421a-90b2-74b4-89ea-c431546d9d35" xlink:href="aii-20260630.xsd#aii_DeferredPolicyAcquisitionCostsNetOfCedingCommissions"/>
    <link:calculationArc order="9" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019e421a-90b2-7b4f-8c93-f365232d06d2" xlink:to="loc_aii_DeferredPolicyAcquisitionCostsNetOfCedingCommissions_019e421a-90b2-74b4-89ea-c431546d9d35" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_019e421a-90b2-7123-b139-b092e3322173" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:calculationArc order="10" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019e421a-90b2-7b4f-8c93-f365232d06d2" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_019e421a-90b2-7123-b139-b092e3322173" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_019e421a-90b2-77f3-b6af-a22d8b577e28" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:calculationArc order="11" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019e421a-90b2-7b4f-8c93-f365232d06d2" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_019e421a-90b2-77f3-b6af-a22d8b577e28" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxAssetsNet_019f8e15-197a-71a8-9c06-a54cf4ddaf68" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredIncomeTaxAssetsNet"/>
    <link:calculationArc order="12" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019e421a-90b2-7b4f-8c93-f365232d06d2" xlink:to="loc_us-gaap_DeferredIncomeTaxAssetsNet_019f8e15-197a-71a8-9c06-a54cf4ddaf68" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssets_019f8e15-197a-76d9-8991-1a2b4d3e64dc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherAssets"/>
    <link:calculationArc order="13" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019e421a-90b2-7b4f-8c93-f365232d06d2" xlink:to="loc_us-gaap_OtherAssets_019f8e15-197a-76d9-8991-1a2b4d3e64dc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_019e421a-90b2-74d6-a566-78c370b3ac31" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Liabilities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense_019e421a-90b2-74a1-9d81-9042a40aa386" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_019e421a-90b2-74d6-a566-78c370b3ac31" xlink:to="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense_019e421a-90b2-74a1-9d81-9042a40aa386" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedIncomeTaxes_019e421a-90b2-7c9d-ab2b-d58c16bdc349" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccruedIncomeTaxes"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_019e421a-90b2-74d6-a566-78c370b3ac31" xlink:to="loc_us-gaap_AccruedIncomeTaxes_019e421a-90b2-7c9d-ab2b-d58c16bdc349" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnearnedPremiums_019e421a-90b2-79fc-ace4-f44dda0fa9ba" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UnearnedPremiums"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_019e421a-90b2-74d6-a566-78c370b3ac31" xlink:to="loc_us-gaap_UnearnedPremiums_019e421a-90b2-79fc-ace4-f44dda0fa9ba" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReinsurancePayable_019e421a-90b2-7f93-9ed9-5ebf6e26f903" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ReinsurancePayable"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_019e421a-90b2-74d6-a566-78c370b3ac31" xlink:to="loc_us-gaap_ReinsurancePayable_019e421a-90b2-7f93-9ed9-5ebf6e26f903" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_aii_AdvancePremiums_019e421a-90b2-7a37-b2c6-09fc17d51fd7" xlink:href="aii-20260630.xsd#aii_AdvancePremiums"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_019e421a-90b2-74d6-a566-78c370b3ac31" xlink:to="loc_aii_AdvancePremiums_019e421a-90b2-7a37-b2c6-09fc17d51fd7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_019e421a-90b2-7b1a-a15c-d4d9fdbb9778" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebt"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_019e421a-90b2-74d6-a566-78c370b3ac31" xlink:to="loc_us-gaap_LongTermDebt_019e421a-90b2-7b1a-a15c-d4d9fdbb9778" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiability_019e421a-90b2-767f-ac35-93a16d03cbfa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLiability"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_019e421a-90b2-74d6-a566-78c370b3ac31" xlink:to="loc_us-gaap_OperatingLeaseLiability_019e421a-90b2-767f-ac35-93a16d03cbfa" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesAndOtherLiabilities_019e421a-90b2-7b54-bdb1-a85ee0eda224" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccruedLiabilitiesAndOtherLiabilities"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_019e421a-90b2-74d6-a566-78c370b3ac31" xlink:to="loc_us-gaap_AccruedLiabilitiesAndOtherLiabilities_019e421a-90b2-7b54-bdb1-a85ee0eda224" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.am.com/role/CondensedConsolidatedStatementsofOperationsandComprehensiveIncomeUnaudited" xlink:type="simple" xlink:href="aii-20260630.xsd#CondensedConsolidatedStatementsofOperationsandComprehensiveIncomeUnaudited"/>
  <link:calculationLink xlink:role="http://www.am.com/role/CondensedConsolidatedStatementsofOperationsandComprehensiveIncomeUnaudited" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_019e421a-90b2-7371-8d90-168254df27d3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_019e421a-90b2-76c5-a1b7-547ffa9da0a5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_019e421a-90b2-7371-8d90-168254df27d3" xlink:to="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_019e421a-90b2-76c5-a1b7-547ffa9da0a5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax_019e421a-90b2-7afe-b737-c3813adc9804" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_019e421a-90b2-7371-8d90-168254df27d3" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax_019e421a-90b2-7afe-b737-c3813adc9804" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PremiumsEarnedNet_019e421a-90b2-76af-8208-fbc499b8a6c2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PremiumsEarnedNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_aii_GrossPremiumEarned_019e421a-90b2-70c4-9b7d-f2f1448aa131" xlink:href="aii-20260630.xsd#aii_GrossPremiumEarned"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_PremiumsEarnedNet_019e421a-90b2-76af-8208-fbc499b8a6c2" xlink:to="loc_aii_GrossPremiumEarned_019e421a-90b2-70c4-9b7d-f2f1448aa131" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CededPremiumsEarned_019e421a-90b2-7867-963d-c5f1aaab54ad" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CededPremiumsEarned"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_PremiumsEarnedNet_019e421a-90b2-76af-8208-fbc499b8a6c2" xlink:to="loc_us-gaap_CededPremiumsEarned_019e421a-90b2-7867-963d-c5f1aaab54ad" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019e421a-90b2-7117-b540-b31fbdc1d167" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019e421a-90b2-74f0-90dd-c307be29b7e6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_019e421a-90b2-7117-b540-b31fbdc1d167" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019e421a-90b2-74f0-90dd-c307be29b7e6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_019e421a-90b2-7844-9c39-ba92f0304953" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_019e421a-90b2-7117-b540-b31fbdc1d167" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_019e421a-90b2-7844-9c39-ba92f0304953" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_019e421a-90b2-7573-a1ee-0f2a1eeea335" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Revenues"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PremiumsEarnedNet_019e421a-90b2-70da-abce-c8a65ce9c1ef" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PremiumsEarnedNet"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Revenues_019e421a-90b2-7573-a1ee-0f2a1eeea335" xlink:to="loc_us-gaap_PremiumsEarnedNet_019e421a-90b2-70da-abce-c8a65ce9c1ef" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_aii_PolicyFeesIncome_019e421a-90b2-7df2-b8e7-755efea6b8a0" xlink:href="aii-20260630.xsd#aii_PolicyFeesIncome"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Revenues_019e421a-90b2-7573-a1ee-0f2a1eeea335" xlink:to="loc_aii_PolicyFeesIncome_019e421a-90b2-7df2-b8e7-755efea6b8a0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetInvestmentIncome_019e421a-90b2-72ba-926c-0f009fdf544b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetInvestmentIncome"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Revenues_019e421a-90b2-7573-a1ee-0f2a1eeea335" xlink:to="loc_us-gaap_NetInvestmentIncome_019e421a-90b2-72ba-926c-0f009fdf544b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealizedInvestmentGainsLosses_019e421a-90b2-7048-8f34-3afbb506093a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RealizedInvestmentGainsLosses"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Revenues_019e421a-90b2-7573-a1ee-0f2a1eeea335" xlink:to="loc_us-gaap_RealizedInvestmentGainsLosses_019e421a-90b2-7048-8f34-3afbb506093a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherIncome_019e421a-90b2-7958-8f25-11b4b6059e87" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherIncome"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Revenues_019e421a-90b2-7573-a1ee-0f2a1eeea335" xlink:to="loc_us-gaap_OtherIncome_019e421a-90b2-7958-8f25-11b4b6059e87" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_aii_GrossPremiumEarned_019e421a-90b2-7c05-93a5-01326e5cfa02" xlink:href="aii-20260630.xsd#aii_GrossPremiumEarned"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PremiumsWrittenGross_019e421a-90b2-7d47-8db7-005aa8d6f1db" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PremiumsWrittenGross"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_aii_GrossPremiumEarned_019e421a-90b2-7c05-93a5-01326e5cfa02" xlink:to="loc_us-gaap_PremiumsWrittenGross_019e421a-90b2-7d47-8db7-005aa8d6f1db" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInUnearnedPremiumsNet_019e421a-90b2-72e9-b1ab-56f0dc90d834" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInUnearnedPremiumsNet"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_aii_GrossPremiumEarned_019e421a-90b2-7c05-93a5-01326e5cfa02" xlink:to="loc_us-gaap_IncreaseDecreaseInUnearnedPremiumsNet_019e421a-90b2-72e9-b1ab-56f0dc90d834" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BenefitsLossesAndExpenses_019e421a-90b2-77e8-8862-fa73f2da143d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BenefitsLossesAndExpenses"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PolicyholderBenefitsAndClaimsIncurredNet_019e421a-90b2-7085-aad7-6acd1edd13bb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PolicyholderBenefitsAndClaimsIncurredNet"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_BenefitsLossesAndExpenses_019e421a-90b2-77e8-8862-fa73f2da143d" xlink:to="loc_us-gaap_PolicyholderBenefitsAndClaimsIncurredNet_019e421a-90b2-7085-aad7-6acd1edd13bb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_aii_PolicyAcquisitionExpenses_019e421a-90b2-7aa1-8d61-151c47a6ce31" xlink:href="aii-20260630.xsd#aii_PolicyAcquisitionExpenses"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_BenefitsLossesAndExpenses_019e421a-90b2-77e8-8862-fa73f2da143d" xlink:to="loc_aii_PolicyAcquisitionExpenses_019e421a-90b2-7aa1-8d61-151c47a6ce31" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpense_019e421a-90b2-705a-bc91-88efa44ecff4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GeneralAndAdministrativeExpense"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_BenefitsLossesAndExpenses_019e421a-90b2-77e8-8862-fa73f2da143d" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpense_019e421a-90b2-705a-bc91-88efa44ecff4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019e421a-90b2-71cd-93fa-cc6b66d75817" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_019e421a-90b2-7204-8205-ec5cb49a66d1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Revenues"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019e421a-90b2-71cd-93fa-cc6b66d75817" xlink:to="loc_us-gaap_Revenues_019e421a-90b2-7204-8205-ec5cb49a66d1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BenefitsLossesAndExpenses_019e421a-90b2-7140-9995-ae8e9c8f30b5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BenefitsLossesAndExpenses"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019e421a-90b2-71cd-93fa-cc6b66d75817" xlink:to="loc_us-gaap_BenefitsLossesAndExpenses_019e421a-90b2-7140-9995-ae8e9c8f30b5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_019e421a-90b2-7a69-b9f0-23a3c834614d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ComprehensiveIncomeNetOfTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019e421a-90b2-7d3c-a846-4bd7e303590a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_019e421a-90b2-7a69-b9f0-23a3c834614d" xlink:to="loc_us-gaap_NetIncomeLoss_019e421a-90b2-7d3c-a846-4bd7e303590a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_019e421a-90b2-7932-a81d-e02b1eaaeff7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_019e421a-90b2-7a69-b9f0-23a3c834614d" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_019e421a-90b2-7932-a81d-e02b1eaaeff7" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.am.com/role/CondensedConsolidatedStatementsofCashFlowsUnaudited" xlink:type="simple" xlink:href="aii-20260630.xsd#CondensedConsolidatedStatementsofCashFlowsUnaudited"/>
  <link:calculationLink xlink:role="http://www.am.com/role/CondensedConsolidatedStatementsofCashFlowsUnaudited" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019e421a-90b2-72e2-8dd5-472d5cd24da2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceInitialPublicOffering_019e421a-90b2-7e0d-b82f-74e45f32f753" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromIssuanceInitialPublicOffering"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019e421a-90b2-72e2-8dd5-472d5cd24da2" xlink:to="loc_us-gaap_ProceedsFromIssuanceInitialPublicOffering_019e421a-90b2-7e0d-b82f-74e45f32f753" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_019e421a-90b2-7bbe-a958-1e2d76965a25" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019e421a-90b2-72e2-8dd5-472d5cd24da2" xlink:to="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_019e421a-90b2-7bbe-a958-1e2d76965a25" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfDividends_019e421a-90b2-78a1-a778-d65ab1ab5459" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsOfDividends"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019e421a-90b2-72e2-8dd5-472d5cd24da2" xlink:to="loc_us-gaap_PaymentsOfDividends_019e421a-90b2-78a1-a778-d65ab1ab5459" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_aii_PaymentOfCashDistributedToMembers_019eac11-39d7-7132-8ad5-04d2e324ec37" xlink:href="aii-20260630.xsd#aii_PaymentOfCashDistributedToMembers"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019e421a-90b2-72e2-8dd5-472d5cd24da2" xlink:to="loc_aii_PaymentOfCashDistributedToMembers_019eac11-39d7-7132-8ad5-04d2e324ec37" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfLongTermDebt_019eac11-39d7-7ffd-bd8d-9acd4ad63f28" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RepaymentsOfLongTermDebt"/>
    <link:calculationArc order="5" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019e421a-90b2-72e2-8dd5-472d5cd24da2" xlink:to="loc_us-gaap_RepaymentsOfLongTermDebt_019eac11-39d7-7ffd-bd8d-9acd4ad63f28" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfStockIssuanceCosts_019eac11-39d7-7ab0-b8d5-c833d4f6c2be" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsOfStockIssuanceCosts"/>
    <link:calculationArc order="6" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019e421a-90b2-72e2-8dd5-472d5cd24da2" xlink:to="loc_us-gaap_PaymentsOfStockIssuanceCosts_019eac11-39d7-7ab0-b8d5-c833d4f6c2be" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_019e421a-90b2-7dd4-98ab-5716474e642a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_019e421a-90b2-7277-bf6f-0ed5a4a6e637" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_019e421a-90b2-7dd4-98ab-5716474e642a" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_019e421a-90b2-7277-bf6f-0ed5a4a6e637" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalents_019e421a-90b2-787c-a953-3f44d347998b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestrictedCashAndCashEquivalents"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_019e421a-90b2-7dd4-98ab-5716474e642a" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalents_019e421a-90b2-787c-a953-3f44d347998b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect_019e421a-90b2-78a5-b21f-bb8efd76acda" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e421a-90b2-7031-8f63-10006ed66ee6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect_019e421a-90b2-78a5-b21f-bb8efd76acda" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e421a-90b2-7031-8f63-10006ed66ee6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019e421a-90b2-7fbe-bbd1-411da019c477" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect_019e421a-90b2-78a5-b21f-bb8efd76acda" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019e421a-90b2-7fbe-bbd1-411da019c477" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019e421a-90b2-71a7-9e96-bfae1f40e276" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect_019e421a-90b2-78a5-b21f-bb8efd76acda" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019e421a-90b2-71a7-9e96-bfae1f40e276" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019e421a-90b2-7b4b-85b2-9cefe2ea7c87" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_019e421a-90b2-71fd-9be7-6f48199510cb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019e421a-90b2-7b4b-85b2-9cefe2ea7c87" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_019e421a-90b2-71fd-9be7-6f48199510cb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleAndMaturityOfHeldToMaturitySecurities_019e421a-90b2-7db4-a19b-ef65e017279a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromSaleAndMaturityOfHeldToMaturitySecurities"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019e421a-90b2-7b4b-85b2-9cefe2ea7c87" xlink:to="loc_us-gaap_ProceedsFromSaleAndMaturityOfHeldToMaturitySecurities_019e421a-90b2-7db4-a19b-ef65e017279a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireHeldToMaturitySecurities_019e421a-90b2-70c5-9efb-c722678fb858" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsToAcquireHeldToMaturitySecurities"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019e421a-90b2-7b4b-85b2-9cefe2ea7c87" xlink:to="loc_us-gaap_PaymentsToAcquireHeldToMaturitySecurities_019e421a-90b2-70c5-9efb-c722678fb858" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_aii_ProceedsFromSalesAndMaturitiesOfShortTermInvestments_019e421a-90b2-774a-a089-352f3fdcf427" xlink:href="aii-20260630.xsd#aii_ProceedsFromSalesAndMaturitiesOfShortTermInvestments"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019e421a-90b2-7b4b-85b2-9cefe2ea7c87" xlink:to="loc_aii_ProceedsFromSalesAndMaturitiesOfShortTermInvestments_019e421a-90b2-774a-a089-352f3fdcf427" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireShortTermInvestments_019e421a-90b2-7581-8fe7-f3c8987a5027" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsToAcquireShortTermInvestments"/>
    <link:calculationArc order="5" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019e421a-90b2-7b4b-85b2-9cefe2ea7c87" xlink:to="loc_us-gaap_PaymentsToAcquireShortTermInvestments_019e421a-90b2-7581-8fe7-f3c8987a5027" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e421a-90b2-794e-a007-774725af90ca" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019e421a-90b2-7e87-92cb-5ebe2d1339ae" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e421a-90b2-794e-a007-774725af90ca" xlink:to="loc_us-gaap_NetIncomeLoss_019e421a-90b2-7e87-92cb-5ebe2d1339ae" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensation_019e421a-90b2-7aea-8e4e-4332bc244677" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensation"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e421a-90b2-794e-a007-774725af90ca" xlink:to="loc_us-gaap_ShareBasedCompensation_019e421a-90b2-7aea-8e4e-4332bc244677" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationAmortizationAndAccretionNet_019e421a-90b2-7828-9ddc-d2f2c880c253" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DepreciationAmortizationAndAccretionNet"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e421a-90b2-794e-a007-774725af90ca" xlink:to="loc_us-gaap_DepreciationAmortizationAndAccretionNet_019e421a-90b2-7828-9ddc-d2f2c880c253" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxesAndTaxCredits_019e421a-90b2-75bd-96aa-3e1ce7b128ed" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredIncomeTaxesAndTaxCredits"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e421a-90b2-794e-a007-774725af90ca" xlink:to="loc_us-gaap_DeferredIncomeTaxesAndTaxCredits_019e421a-90b2-75bd-96aa-3e1ce7b128ed" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealizedInvestmentGainsLosses_019e421a-90b2-7da3-bf5d-aabf8a898950" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RealizedInvestmentGainsLosses"/>
    <link:calculationArc order="5" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e421a-90b2-794e-a007-774725af90ca" xlink:to="loc_us-gaap_RealizedInvestmentGainsLosses_019e421a-90b2-7da3-bf5d-aabf8a898950" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInPremiumsReceivable_019e421a-90b2-73ca-9580-5a3fc6efbc3c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInPremiumsReceivable"/>
    <link:calculationArc order="6" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e421a-90b2-794e-a007-774725af90ca" xlink:to="loc_us-gaap_IncreaseDecreaseInPremiumsReceivable_019e421a-90b2-73ca-9580-5a3fc6efbc3c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccruedInvestmentIncomeReceivable_019e421a-90b2-73e0-b9a8-3fd2885f43db" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInAccruedInvestmentIncomeReceivable"/>
    <link:calculationArc order="7" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e421a-90b2-794e-a007-774725af90ca" xlink:to="loc_us-gaap_IncreaseDecreaseInAccruedInvestmentIncomeReceivable_019e421a-90b2-73e0-b9a8-3fd2885f43db" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidReinsurancePremiums_019e421a-90b2-7187-97aa-476977d4f1c4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInPrepaidReinsurancePremiums"/>
    <link:calculationArc order="8" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e421a-90b2-794e-a007-774725af90ca" xlink:to="loc_us-gaap_IncreaseDecreaseInPrepaidReinsurancePremiums_019e421a-90b2-7187-97aa-476977d4f1c4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInReinsuranceRecoverable_019e421a-90b2-7b6a-a98a-efe7e85cd472" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInReinsuranceRecoverable"/>
    <link:calculationArc order="9" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e421a-90b2-794e-a007-774725af90ca" xlink:to="loc_us-gaap_IncreaseDecreaseInReinsuranceRecoverable_019e421a-90b2-7b6a-a98a-efe7e85cd472" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_019e421a-90b2-73ed-9291-4e4d74cedb0f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInOtherOperatingAssets"/>
    <link:calculationArc order="10" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e421a-90b2-794e-a007-774725af90ca" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_019e421a-90b2-73ed-9291-4e4d74cedb0f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_aii_IncreaseDecreaseInUnpaidLossesAndLossAdjustmentExpenses_019e421a-90b2-7d40-927b-6bc59b53efbe" xlink:href="aii-20260630.xsd#aii_IncreaseDecreaseInUnpaidLossesAndLossAdjustmentExpenses"/>
    <link:calculationArc order="11" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e421a-90b2-794e-a007-774725af90ca" xlink:to="loc_aii_IncreaseDecreaseInUnpaidLossesAndLossAdjustmentExpenses_019e421a-90b2-7d40-927b-6bc59b53efbe" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInUnearnedPremiums_019e421a-90b2-78c6-b796-b7d69602823c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInUnearnedPremiums"/>
    <link:calculationArc order="12" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e421a-90b2-794e-a007-774725af90ca" xlink:to="loc_us-gaap_IncreaseDecreaseInUnearnedPremiums_019e421a-90b2-78c6-b796-b7d69602823c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInReinsurancePayables_019e421a-90b2-7694-87ad-f0fdd34361a3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInReinsurancePayables"/>
    <link:calculationArc order="13" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e421a-90b2-794e-a007-774725af90ca" xlink:to="loc_us-gaap_IncreaseDecreaseInReinsurancePayables_019e421a-90b2-7694-87ad-f0fdd34361a3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_aii_IncreaseDecreaseInAdvancePremium_019e421a-90b2-7094-8ad8-01371271b78d" xlink:href="aii-20260630.xsd#aii_IncreaseDecreaseInAdvancePremium"/>
    <link:calculationArc order="14" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e421a-90b2-794e-a007-774725af90ca" xlink:to="loc_aii_IncreaseDecreaseInAdvancePremium_019e421a-90b2-7094-8ad8-01371271b78d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable_019e421a-90b2-7aea-8d09-17649fed9282" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable"/>
    <link:calculationArc order="15" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e421a-90b2-794e-a007-774725af90ca" xlink:to="loc_us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable_019e421a-90b2-7aea-8d09-17649fed9282" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOperatingLeaseLiability_019e421a-90b2-721a-922c-784dde4d720d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInOperatingLeaseLiability"/>
    <link:calculationArc order="16" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e421a-90b2-794e-a007-774725af90ca" xlink:to="loc_us-gaap_IncreaseDecreaseInOperatingLeaseLiability_019e421a-90b2-721a-922c-784dde4d720d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_aii_IncreaseDecreaseInDeferredPolicyAcquisitionCostsNetUnearnedCedingCommissions_019e421a-90b2-7c2d-9ed4-5de0ee086973" xlink:href="aii-20260630.xsd#aii_IncreaseDecreaseInDeferredPolicyAcquisitionCostsNetUnearnedCedingCommissions"/>
    <link:calculationArc order="17" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e421a-90b2-794e-a007-774725af90ca" xlink:to="loc_aii_IncreaseDecreaseInDeferredPolicyAcquisitionCostsNetUnearnedCedingCommissions_019e421a-90b2-7c2d-9ed4-5de0ee086973" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_019e421a-90b2-7c6c-9764-e0e7a642da27" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInOtherOperatingLiabilities"/>
    <link:calculationArc order="18" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e421a-90b2-794e-a007-774725af90ca" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_019e421a-90b2-7c6c-9764-e0e7a642da27" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.am.com/role/VariableInterestEntityScheduleofBalanceSheetClassificationandExposureofRestrictedCashandInvestmentsDetails" xlink:type="simple" xlink:href="aii-20260630.xsd#VariableInterestEntityScheduleofBalanceSheetClassificationandExposureofRestrictedCashandInvestmentsDetails"/>
  <link:calculationLink xlink:role="http://www.am.com/role/VariableInterestEntityScheduleofBalanceSheetClassificationandExposureofRestrictedCashandInvestmentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndInvestments_019e421a-90b2-7d3a-8a17-1ab9a5f60438" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestrictedCashAndInvestments"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalents_019e421a-90b2-798c-87da-cd73cdb37778" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestrictedCashAndCashEquivalents"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_RestrictedCashAndInvestments_019e421a-90b2-7d3a-8a17-1ab9a5f60438" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalents_019e421a-90b2-798c-87da-cd73cdb37778" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.am.com/role/InvestmentsScheduleofAggregateEstimatedFairValuesofAvailableForSaleSecuritieswithUnrealizedLossesDetails" xlink:type="simple" xlink:href="aii-20260630.xsd#InvestmentsScheduleofAggregateEstimatedFairValuesofAvailableForSaleSecuritieswithUnrealizedLossesDetails"/>
  <link:calculationLink xlink:role="http://www.am.com/role/InvestmentsScheduleofAggregateEstimatedFairValuesofAvailableForSaleSecuritieswithUnrealizedLossesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition_019e421a-90b2-73d9-bac0-2e18e3558256" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger_019e421a-90b2-771a-a7af-3b98787638e9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition_019e421a-90b2-73d9-bac0-2e18e3558256" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger_019e421a-90b2-771a-a7af-3b98787638e9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months_019e421a-90b2-77fe-a28d-a4b0b9543967" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition_019e421a-90b2-73d9-bac0-2e18e3558256" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months_019e421a-90b2-77fe-a28d-a4b0b9543967" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss_019e421a-90b2-7419-95cc-c14ea2e00cb7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_019e421a-90b2-7fa4-a599-7c2516632e16" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss_019e421a-90b2-7419-95cc-c14ea2e00cb7" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_019e421a-90b2-7fa4-a599-7c2516632e16" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_019e421a-90b2-7002-9adf-1a70670f9431" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss_019e421a-90b2-7419-95cc-c14ea2e00cb7" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_019e421a-90b2-7002-9adf-1a70670f9431" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.am.com/role/InvestmentsScheduleofAmortizedCostandEstimatedFairValuefromContractualMaturitiesDetails" xlink:type="simple" xlink:href="aii-20260630.xsd#InvestmentsScheduleofAmortizedCostandEstimatedFairValuefromContractualMaturitiesDetails"/>
  <link:calculationLink xlink:role="http://www.am.com/role/InvestmentsScheduleofAmortizedCostandEstimatedFairValuefromContractualMaturitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Investments_019e421a-90b2-7c81-959a-657c33eb877c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Investments"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue_019e421a-90b2-74a6-a2df-a5dbdd5b1291" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Investments_019e421a-90b2-7c81-959a-657c33eb877c" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue_019e421a-90b2-74a6-a2df-a5dbdd5b1291" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue_019e421a-90b2-7d19-afb2-0e4aa515e652" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Investments_019e421a-90b2-7c81-959a-657c33eb877c" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue_019e421a-90b2-7d19-afb2-0e4aa515e652" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue_019e421a-90b2-76d7-88b2-1ca43b20f9fe" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Investments_019e421a-90b2-7c81-959a-657c33eb877c" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue_019e421a-90b2-76d7-88b2-1ca43b20f9fe" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue_019e421a-90b2-78de-9d71-9026561412f3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Investments_019e421a-90b2-7c81-959a-657c33eb877c" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue_019e421a-90b2-78de-9d71-9026561412f3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue_019e421a-90b2-75b6-9636-dfdcec55fa55" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Investments_019e421a-90b2-7c81-959a-657c33eb877c" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue_019e421a-90b2-75b6-9636-dfdcec55fa55" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_019e421a-90b2-7e73-86d7-781a6a8254bf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost_019e421a-90b2-7a73-bd1b-a8b1ebd02e6a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_019e421a-90b2-7e73-86d7-781a6a8254bf" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost_019e421a-90b2-7a73-bd1b-a8b1ebd02e6a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost_019e421a-90b2-71f5-942b-6c67c303cccd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_019e421a-90b2-7e73-86d7-781a6a8254bf" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost_019e421a-90b2-71f5-942b-6c67c303cccd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost_019e421a-90b2-7f2f-b492-9bffc59a714b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_019e421a-90b2-7e73-86d7-781a6a8254bf" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost_019e421a-90b2-7f2f-b492-9bffc59a714b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost_019e421a-90b2-77ba-9980-af086df702d6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_019e421a-90b2-7e73-86d7-781a6a8254bf" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost_019e421a-90b2-77ba-9980-af086df702d6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost_019e421a-90b2-7950-9fa6-d3db3027fc8d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_019e421a-90b2-7e73-86d7-781a6a8254bf" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost_019e421a-90b2-7950-9fa6-d3db3027fc8d" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.am.com/role/InvestmentsScheduleofCompanysNetInvestmentIncomeDetails" xlink:type="simple" xlink:href="aii-20260630.xsd#InvestmentsScheduleofCompanysNetInvestmentIncomeDetails"/>
  <link:calculationLink xlink:role="http://www.am.com/role/InvestmentsScheduleofCompanysNetInvestmentIncomeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetInvestmentIncome_019e421a-90b2-7470-95d2-0343a9daeefa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetInvestmentIncome"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossInvestmentIncomeOperating_019e421a-90b2-7e66-967b-8fe41ee999a4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GrossInvestmentIncomeOperating"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetInvestmentIncome_019e421a-90b2-7470-95d2-0343a9daeefa" xlink:to="loc_us-gaap_GrossInvestmentIncomeOperating_019e421a-90b2-7e66-967b-8fe41ee999a4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIncomeInvestmentExpense_019e421a-90b2-7dc7-98ef-f3573bb6c6ba" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentIncomeInvestmentExpense"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetInvestmentIncome_019e421a-90b2-7470-95d2-0343a9daeefa" xlink:to="loc_us-gaap_InvestmentIncomeInvestmentExpense_019e421a-90b2-7dc7-98ef-f3573bb6c6ba" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.am.com/role/FairValueMeasurementsScheduleofFinancialAssetsMeasuredatFairValueonRecurringBasisDetails" xlink:type="simple" xlink:href="aii-20260630.xsd#FairValueMeasurementsScheduleofFinancialAssetsMeasuredatFairValueonRecurringBasisDetails"/>
  <link:calculationLink xlink:role="http://www.am.com/role/FairValueMeasurementsScheduleofFinancialAssetsMeasuredatFairValueonRecurringBasisDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_019e421a-90b2-7e36-a6dd-c0e022ea4a2b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsFairValueDisclosure"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_019e421a-90b2-7c57-a988-6a1d0b905d3f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsFairValueDisclosure_019e421a-90b2-7e36-a6dd-c0e022ea4a2b" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_019e421a-90b2-7c57-a988-6a1d0b905d3f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermInvestments_019e421a-90b2-77ae-9c83-3d758dee929f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShortTermInvestments"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsFairValueDisclosure_019e421a-90b2-7e36-a6dd-c0e022ea4a2b" xlink:to="loc_us-gaap_ShortTermInvestments_019e421a-90b2-77ae-9c83-3d758dee929f" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.am.com/role/PropertyandEquipmentScheduleofPropertyandEquipmentDetails" xlink:type="simple" xlink:href="aii-20260630.xsd#PropertyandEquipmentScheduleofPropertyandEquipmentDetails"/>
  <link:calculationLink xlink:role="http://www.am.com/role/PropertyandEquipmentScheduleofPropertyandEquipmentDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_019e421a-9181-7666-893c-11b935259667" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_019e421a-9181-7d07-b7da-ce6a9ac426ab" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentGross"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNet_019e421a-9181-7666-893c-11b935259667" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_019e421a-9181-7d07-b7da-ce6a9ac426ab" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_019e421a-9181-7186-9c28-3c1f17de424c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNet_019e421a-9181-7666-893c-11b935259667" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_019e421a-9181-7186-9c28-3c1f17de424c" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.am.com/role/DeferredPolicyAcquisitionCostsNetofCedingCommissionsDetails" xlink:type="simple" xlink:href="aii-20260630.xsd#DeferredPolicyAcquisitionCostsNetofCedingCommissionsDetails"/>
  <link:calculationLink xlink:role="http://www.am.com/role/DeferredPolicyAcquisitionCostsNetofCedingCommissionsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_aii_DeferredPolicyAcquisitionCostsGrossExcludingUnearnedCedingCommissions_019e421a-9182-78b4-9173-594b2815f725" xlink:href="aii-20260630.xsd#aii_DeferredPolicyAcquisitionCostsGrossExcludingUnearnedCedingCommissions"/>
    <link:loc xlink:type="locator" xlink:label="loc_aii_DeferredPolicyAcquisitionCostsProducerCommissionsExcludingUnearnedCedingCommissions_019e421a-9182-789d-8751-9c03a76f3935" xlink:href="aii-20260630.xsd#aii_DeferredPolicyAcquisitionCostsProducerCommissionsExcludingUnearnedCedingCommissions"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_aii_DeferredPolicyAcquisitionCostsGrossExcludingUnearnedCedingCommissions_019e421a-9182-78b4-9173-594b2815f725" xlink:to="loc_aii_DeferredPolicyAcquisitionCostsProducerCommissionsExcludingUnearnedCedingCommissions_019e421a-9182-789d-8751-9c03a76f3935" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_aii_DeferredPolicyAcquisitionCostsPremiumTaxesExcludingUnearnedCedingCommissions_019e421a-9182-73a7-be2c-97cfd1df1823" xlink:href="aii-20260630.xsd#aii_DeferredPolicyAcquisitionCostsPremiumTaxesExcludingUnearnedCedingCommissions"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_aii_DeferredPolicyAcquisitionCostsGrossExcludingUnearnedCedingCommissions_019e421a-9182-78b4-9173-594b2815f725" xlink:to="loc_aii_DeferredPolicyAcquisitionCostsPremiumTaxesExcludingUnearnedCedingCommissions_019e421a-9182-73a7-be2c-97cfd1df1823" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_aii_DeferredPolicyAcquisitionCostsOtherAcquisitionCostsExcludingUnearnedCedingCommissions_019e421a-9182-7784-8e80-fe5a0602e39b" xlink:href="aii-20260630.xsd#aii_DeferredPolicyAcquisitionCostsOtherAcquisitionCostsExcludingUnearnedCedingCommissions"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_aii_DeferredPolicyAcquisitionCostsGrossExcludingUnearnedCedingCommissions_019e421a-9182-78b4-9173-594b2815f725" xlink:to="loc_aii_DeferredPolicyAcquisitionCostsOtherAcquisitionCostsExcludingUnearnedCedingCommissions_019e421a-9182-7784-8e80-fe5a0602e39b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_aii_DeferredPolicyAcquisitionCostsProducerCommissions_019e421a-9182-7c97-8078-7edfebf7e708" xlink:href="aii-20260630.xsd#aii_DeferredPolicyAcquisitionCostsProducerCommissions"/>
    <link:loc xlink:type="locator" xlink:label="loc_aii_DeferredPolicyAcquisitionCostsProducerCommissionsExcludingUnearnedCedingCommissions_019e421a-9182-7e9b-8db2-4d56dd3d2956" xlink:href="aii-20260630.xsd#aii_DeferredPolicyAcquisitionCostsProducerCommissionsExcludingUnearnedCedingCommissions"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_aii_DeferredPolicyAcquisitionCostsProducerCommissions_019e421a-9182-7c97-8078-7edfebf7e708" xlink:to="loc_aii_DeferredPolicyAcquisitionCostsProducerCommissionsExcludingUnearnedCedingCommissions_019e421a-9182-7e9b-8db2-4d56dd3d2956" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_aii_DeferredPolicyAcquisitionCostsCedingCommissions_019e421a-9182-74c3-9cd1-d49f61c39313" xlink:href="aii-20260630.xsd#aii_DeferredPolicyAcquisitionCostsCedingCommissions"/>
    <link:loc xlink:type="locator" xlink:label="loc_aii_DeferredPolicyAcquisitionCostsUnearnedCedingCommissions_019e421a-9182-7074-9f62-f071e13d613c" xlink:href="aii-20260630.xsd#aii_DeferredPolicyAcquisitionCostsUnearnedCedingCommissions"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_aii_DeferredPolicyAcquisitionCostsCedingCommissions_019e421a-9182-74c3-9cd1-d49f61c39313" xlink:to="loc_aii_DeferredPolicyAcquisitionCostsUnearnedCedingCommissions_019e421a-9182-7074-9f62-f071e13d613c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_aii_DeferredPolicyAcquisitionCostsOtherAcquisitionCosts_019e421a-9182-7822-8064-13e61fd2b6c7" xlink:href="aii-20260630.xsd#aii_DeferredPolicyAcquisitionCostsOtherAcquisitionCosts"/>
    <link:loc xlink:type="locator" xlink:label="loc_aii_DeferredPolicyAcquisitionCostsOtherAcquisitionCostsExcludingUnearnedCedingCommissions_019e421a-9182-7a9b-9da3-94edb1578d5e" xlink:href="aii-20260630.xsd#aii_DeferredPolicyAcquisitionCostsOtherAcquisitionCostsExcludingUnearnedCedingCommissions"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_aii_DeferredPolicyAcquisitionCostsOtherAcquisitionCosts_019e421a-9182-7822-8064-13e61fd2b6c7" xlink:to="loc_aii_DeferredPolicyAcquisitionCostsOtherAcquisitionCostsExcludingUnearnedCedingCommissions_019e421a-9182-7a9b-9da3-94edb1578d5e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_aii_DeferredPolicyAcquisitionCostsGross_019e421a-9182-7e52-8d28-2a22e22b8fd9" xlink:href="aii-20260630.xsd#aii_DeferredPolicyAcquisitionCostsGross"/>
    <link:loc xlink:type="locator" xlink:label="loc_aii_DeferredPolicyAcquisitionCostsProducerCommissions_019e421a-9182-71a6-b7d7-0b99b313bf22" xlink:href="aii-20260630.xsd#aii_DeferredPolicyAcquisitionCostsProducerCommissions"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_aii_DeferredPolicyAcquisitionCostsGross_019e421a-9182-7e52-8d28-2a22e22b8fd9" xlink:to="loc_aii_DeferredPolicyAcquisitionCostsProducerCommissions_019e421a-9182-71a6-b7d7-0b99b313bf22" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_aii_DeferredPolicyAcquisitionCostsPremiumTaxes_019e421a-9182-7dbd-9cf8-b232f54bcda6" xlink:href="aii-20260630.xsd#aii_DeferredPolicyAcquisitionCostsPremiumTaxes"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_aii_DeferredPolicyAcquisitionCostsGross_019e421a-9182-7e52-8d28-2a22e22b8fd9" xlink:to="loc_aii_DeferredPolicyAcquisitionCostsPremiumTaxes_019e421a-9182-7dbd-9cf8-b232f54bcda6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_aii_DeferredPolicyAcquisitionCostsOtherAcquisitionCosts_019e421a-9182-7e19-ba14-e61e1eef18f9" xlink:href="aii-20260630.xsd#aii_DeferredPolicyAcquisitionCostsOtherAcquisitionCosts"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_aii_DeferredPolicyAcquisitionCostsGross_019e421a-9182-7e52-8d28-2a22e22b8fd9" xlink:to="loc_aii_DeferredPolicyAcquisitionCostsOtherAcquisitionCosts_019e421a-9182-7e19-ba14-e61e1eef18f9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_aii_DeferredPolicyAcquisitionCostsCedingCommissions_019e421a-9182-757b-89fa-0deeafc0a2cf" xlink:href="aii-20260630.xsd#aii_DeferredPolicyAcquisitionCostsCedingCommissions"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_aii_DeferredPolicyAcquisitionCostsGross_019e421a-9182-7e52-8d28-2a22e22b8fd9" xlink:to="loc_aii_DeferredPolicyAcquisitionCostsCedingCommissions_019e421a-9182-757b-89fa-0deeafc0a2cf" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_aii_DeferredPolicyAcquisitionCostsPremiumTaxes_019e421a-9182-7d9e-acb3-572db346224f" xlink:href="aii-20260630.xsd#aii_DeferredPolicyAcquisitionCostsPremiumTaxes"/>
    <link:loc xlink:type="locator" xlink:label="loc_aii_DeferredPolicyAcquisitionCostsPremiumTaxesExcludingUnearnedCedingCommissions_019e421a-9182-75a2-9108-4cac735491bf" xlink:href="aii-20260630.xsd#aii_DeferredPolicyAcquisitionCostsPremiumTaxesExcludingUnearnedCedingCommissions"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_aii_DeferredPolicyAcquisitionCostsPremiumTaxes_019e421a-9182-7d9e-acb3-572db346224f" xlink:to="loc_aii_DeferredPolicyAcquisitionCostsPremiumTaxesExcludingUnearnedCedingCommissions_019e421a-9182-75a2-9108-4cac735491bf" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense_019e421a-9182-7134-9590-79cba1a71e8d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense"/>
    <link:loc xlink:type="locator" xlink:label="loc_aii_DeferredPolicyAcquisitionCostsAmortizationExpenseExcludingUnearnedCedingCommissions_019e421a-9182-7956-85f6-8477f5df2301" xlink:href="aii-20260630.xsd#aii_DeferredPolicyAcquisitionCostsAmortizationExpenseExcludingUnearnedCedingCommissions"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense_019e421a-9182-7134-9590-79cba1a71e8d" xlink:to="loc_aii_DeferredPolicyAcquisitionCostsAmortizationExpenseExcludingUnearnedCedingCommissions_019e421a-9182-7956-85f6-8477f5df2301" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_aii_DeferredPolicyAcquisitionCostsAmortizationExpenseUnearnedCedingCommissions_019e421a-9182-7cfe-bbe6-2d9408368357" xlink:href="aii-20260630.xsd#aii_DeferredPolicyAcquisitionCostsAmortizationExpenseUnearnedCedingCommissions"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense_019e421a-9182-7134-9590-79cba1a71e8d" xlink:to="loc_aii_DeferredPolicyAcquisitionCostsAmortizationExpenseUnearnedCedingCommissions_019e421a-9182-7cfe-bbe6-2d9408368357" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_aii_DeferredPolicyAcquisitionCostsGrossUnearnedCedingCommissions_019e421a-9182-7bc2-9811-feb016d80c9f" xlink:href="aii-20260630.xsd#aii_DeferredPolicyAcquisitionCostsGrossUnearnedCedingCommissions"/>
    <link:loc xlink:type="locator" xlink:label="loc_aii_DeferredPolicyAcquisitionCostsUnearnedCedingCommissions_019e421a-9182-75b2-a1a3-adcb697e1b47" xlink:href="aii-20260630.xsd#aii_DeferredPolicyAcquisitionCostsUnearnedCedingCommissions"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_aii_DeferredPolicyAcquisitionCostsGrossUnearnedCedingCommissions_019e421a-9182-7bc2-9811-feb016d80c9f" xlink:to="loc_aii_DeferredPolicyAcquisitionCostsUnearnedCedingCommissions_019e421a-9182-75b2-a1a3-adcb697e1b47" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_aii_DeferredPolicyAcquisitionCostsNetOfCedingCommissions_019e421a-9182-79a0-bad8-7e6757d706b7" xlink:href="aii-20260630.xsd#aii_DeferredPolicyAcquisitionCostsNetOfCedingCommissions"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredPolicyAcquisitionCosts_019e421a-9182-7fd1-8ed4-c28e81340afa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredPolicyAcquisitionCosts"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_aii_DeferredPolicyAcquisitionCostsNetOfCedingCommissions_019e421a-9182-79a0-bad8-7e6757d706b7" xlink:to="loc_us-gaap_DeferredPolicyAcquisitionCosts_019e421a-9182-7fd1-8ed4-c28e81340afa" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_aii_DeferredPolicyAcquisitionCostUnearnedCedingCommissions_019e421a-9182-7cbe-8aa4-ba91d6d5f6a8" xlink:href="aii-20260630.xsd#aii_DeferredPolicyAcquisitionCostUnearnedCedingCommissions"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_aii_DeferredPolicyAcquisitionCostsNetOfCedingCommissions_019e421a-9182-79a0-bad8-7e6757d706b7" xlink:to="loc_aii_DeferredPolicyAcquisitionCostUnearnedCedingCommissions_019e421a-9182-7cbe-8aa4-ba91d6d5f6a8" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.am.com/role/DeferredPolicyAcquisitionCostsNetofCedingCommissionsDetails_1" xlink:type="simple" xlink:href="aii-20260630.xsd#DeferredPolicyAcquisitionCostsNetofCedingCommissionsDetails_1"/>
  <link:calculationLink xlink:role="http://www.am.com/role/DeferredPolicyAcquisitionCostsNetofCedingCommissionsDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_aii_DeferredPolicyAcquisitionCostsGross_019e421a-9182-7800-a818-54a912ebdca3" xlink:href="aii-20260630.xsd#aii_DeferredPolicyAcquisitionCostsGross"/>
    <link:loc xlink:type="locator" xlink:label="loc_aii_DeferredPolicyAcquisitionCostsGrossExcludingUnearnedCedingCommissions_019e421a-9182-7c6b-a4e9-228e3c36562e" xlink:href="aii-20260630.xsd#aii_DeferredPolicyAcquisitionCostsGrossExcludingUnearnedCedingCommissions"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_aii_DeferredPolicyAcquisitionCostsGross_019e421a-9182-7800-a818-54a912ebdca3" xlink:to="loc_aii_DeferredPolicyAcquisitionCostsGrossExcludingUnearnedCedingCommissions_019e421a-9182-7c6b-a4e9-228e3c36562e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_aii_DeferredPolicyAcquisitionCostsGrossUnearnedCedingCommissions_019e421a-9182-7fe3-9ba5-9a2dc5c120ec" xlink:href="aii-20260630.xsd#aii_DeferredPolicyAcquisitionCostsGrossUnearnedCedingCommissions"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_aii_DeferredPolicyAcquisitionCostsGross_019e421a-9182-7800-a818-54a912ebdca3" xlink:to="loc_aii_DeferredPolicyAcquisitionCostsGrossUnearnedCedingCommissions_019e421a-9182-7fe3-9ba5-9a2dc5c120ec" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.am.com/role/LiabilityforUnpaidLossesandLossAdjustmentExpensesScheduleofReconciliationofChangesintheLiabilityforUnpaidLossesAndLAEDetails" xlink:type="simple" xlink:href="aii-20260630.xsd#LiabilityforUnpaidLossesandLossAdjustmentExpensesScheduleofReconciliationofChangesintheLiabilityforUnpaidLossesAndLAEDetails"/>
  <link:calculationLink xlink:role="http://www.am.com/role/LiabilityforUnpaidLossesandLossAdjustmentExpensesScheduleofReconciliationofChangesintheLiabilityforUnpaidLossesAndLAEDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1_019e421a-9182-79d0-b266-90a425d76079" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense_019e421a-9182-7494-ab67-659aa63a790b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1_019e421a-9182-79d0-b266-90a425d76079" xlink:to="loc_us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense_019e421a-9182-7494-ab67-659aa63a790b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense_019e421a-9182-74be-9f2d-645131a1c20a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1_019e421a-9182-79d0-b266-90a425d76079" xlink:to="loc_us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense_019e421a-9182-74be-9f2d-645131a1c20a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForLossesAndLossAdjustmentExpense_019e421a-9182-7365-870d-6def39b6a316" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsForLossesAndLossAdjustmentExpense"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1_019e421a-9182-7863-ac96-feca4d70fba4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_PaymentsForLossesAndLossAdjustmentExpense_019e421a-9182-7365-870d-6def39b6a316" xlink:to="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1_019e421a-9182-7863-ac96-feca4d70fba4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1_019e421a-9182-75f2-ab6d-bbd4a45bd38c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_PaymentsForLossesAndLossAdjustmentExpense_019e421a-9182-7365-870d-6def39b6a316" xlink:to="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1_019e421a-9182-75f2-ab6d-bbd4a45bd38c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet_019e421a-9182-717c-b1d4-91374e19753a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments_019e421a-9182-7e82-b3f4-0c358fc3112d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet_019e421a-9182-717c-b1d4-91374e19753a" xlink:to="loc_us-gaap_ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments_019e421a-9182-7e82-b3f4-0c358fc3112d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense_019e421a-9182-7053-a627-31d67f1b7e02" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet_019e421a-9182-717c-b1d4-91374e19753a" xlink:to="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense_019e421a-9182-7053-a627-31d67f1b7e02" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.am.com/role/ReinsuranceScheduleofEffectsofReinsuranceDetails" xlink:type="simple" xlink:href="aii-20260630.xsd#ReinsuranceScheduleofEffectsofReinsuranceDetails"/>
  <link:calculationLink xlink:role="http://www.am.com/role/ReinsuranceScheduleofEffectsofReinsuranceDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PremiumsWrittenNet_019e421a-9182-7e66-aca4-466a19d6b6f9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PremiumsWrittenNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PremiumsWrittenGross_019e421a-9182-7eeb-a30c-ced696f3fdf5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PremiumsWrittenGross"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_PremiumsWrittenNet_019e421a-9182-7e66-aca4-466a19d6b6f9" xlink:to="loc_us-gaap_PremiumsWrittenGross_019e421a-9182-7eeb-a30c-ced696f3fdf5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CededPremiumsWritten_019e421a-9182-700b-87b6-5c5bbcf1711e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CededPremiumsWritten"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_PremiumsWrittenNet_019e421a-9182-7e66-aca4-466a19d6b6f9" xlink:to="loc_us-gaap_CededPremiumsWritten_019e421a-9182-700b-87b6-5c5bbcf1711e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PremiumsWrittenGross_019e421a-9182-7b72-aa79-874260a0bd0b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PremiumsWrittenGross"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DirectPremiumsWritten_019e421a-9182-7182-9add-0a9bd561a41a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DirectPremiumsWritten"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_PremiumsWrittenGross_019e421a-9182-7b72-aa79-874260a0bd0b" xlink:to="loc_us-gaap_DirectPremiumsWritten_019e421a-9182-7182-9add-0a9bd561a41a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssumedPremiumsWritten_019e421a-9182-77a4-b63a-842ea2c15edc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssumedPremiumsWritten"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_PremiumsWrittenGross_019e421a-9182-7b72-aa79-874260a0bd0b" xlink:to="loc_us-gaap_AssumedPremiumsWritten_019e421a-9182-77a4-b63a-842ea2c15edc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_aii_PremiumsEarnedGross_019e421a-9182-775a-a93d-cb68c714434b" xlink:href="aii-20260630.xsd#aii_PremiumsEarnedGross"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DirectPremiumsEarned_019e421a-9182-73fe-b82a-5b165daa6c62" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DirectPremiumsEarned"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_aii_PremiumsEarnedGross_019e421a-9182-775a-a93d-cb68c714434b" xlink:to="loc_us-gaap_DirectPremiumsEarned_019e421a-9182-73fe-b82a-5b165daa6c62" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssumedPremiumsEarned_019e421a-9182-71c4-a57e-322da11e135a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssumedPremiumsEarned"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_aii_PremiumsEarnedGross_019e421a-9182-775a-a93d-cb68c714434b" xlink:to="loc_us-gaap_AssumedPremiumsEarned_019e421a-9182-71c4-a57e-322da11e135a" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.am.com/role/EarningsPerShareScheduleofEarningsPerShareDetails" xlink:type="simple" xlink:href="aii-20260630.xsd#EarningsPerShareScheduleofEarningsPerShareDetails"/>
  <link:calculationLink xlink:role="http://www.am.com/role/EarningsPerShareScheduleofEarningsPerShareDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_019e421a-9182-7cbc-a021-2c0537b220f6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019e421a-9182-7b26-8412-cdda75564701" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_019e421a-9182-7cbc-a021-2c0537b220f6" xlink:to="loc_us-gaap_NetIncomeLoss_019e421a-9182-7b26-8412-cdda75564701" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic_019e421a-9182-7a87-a7e6-78140c6e7178" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_019e421a-9182-7cbc-a021-2c0537b220f6" xlink:to="loc_us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic_019e421a-9182-7a87-a7e6-78140c6e7178" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.am.com/role/OtherComprehensiveIncomeLossScheduleofOtherComprehensiveIncomeLossDetails" xlink:type="simple" xlink:href="aii-20260630.xsd#OtherComprehensiveIncomeLossScheduleofOtherComprehensiveIncomeLossDetails"/>
  <link:calculationLink xlink:role="http://www.am.com/role/OtherComprehensiveIncomeLossScheduleofOtherComprehensiveIncomeLossDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossTaxPortionAttributableToParent1_019feb79-5780-7221-9f5b-3645eb74c7a3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossTaxPortionAttributableToParent1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsTax_019feb79-5780-7517-a9c0-662ae779e64d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossTaxPortionAttributableToParent1_019feb79-5780-7221-9f5b-3645eb74c7a3" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsTax_019feb79-5780-7517-a9c0-662ae779e64d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationFromAociCurrentPeriodTax_019feb79-5780-7aad-988a-8bece8920244" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ReclassificationFromAociCurrentPeriodTax"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossTaxPortionAttributableToParent1_019feb79-5780-7221-9f5b-3645eb74c7a3" xlink:to="loc_us-gaap_ReclassificationFromAociCurrentPeriodTax_019feb79-5780-7aad-988a-8bece8920244" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_019e421a-9182-79d8-906a-b0abd9c13c51" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent_019e421a-9182-705d-91d5-fe885019c677" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_019e421a-9182-79d8-906a-b0abd9c13c51" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent_019e421a-9182-705d-91d5-fe885019c677" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossTaxPortionAttributableToParent1_019e421a-9182-775f-a6e4-6b47fc879937" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossTaxPortionAttributableToParent1"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_019e421a-9182-79d8-906a-b0abd9c13c51" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossTaxPortionAttributableToParent1_019e421a-9182-775f-a6e4-6b47fc879937" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent_019e421a-9182-7989-995c-08a60936a053" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent_019e421a-9182-7446-9490-ebd7878d2422" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent_019e421a-9182-7989-995c-08a60936a053" xlink:to="loc_us-gaap_ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent_019e421a-9182-7446-9490-ebd7878d2422" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationFromAociCurrentPeriodTax_019e421a-9182-7769-8335-ea1f715298e4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ReclassificationFromAociCurrentPeriodTax"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent_019e421a-9182-7989-995c-08a60936a053" xlink:to="loc_us-gaap_ReclassificationFromAociCurrentPeriodTax_019e421a-9182-7769-8335-ea1f715298e4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OciBeforeReclassificationsNetOfTaxAttributableToParent_019e421a-9182-7b54-8cb9-1d0e07ba3ec6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OciBeforeReclassificationsNetOfTaxAttributableToParent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OciBeforeReclassificationsBeforeTaxAttributableToParent_019e421a-9182-73f9-9fda-2f45eeb36f5f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OciBeforeReclassificationsBeforeTaxAttributableToParent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OciBeforeReclassificationsNetOfTaxAttributableToParent_019e421a-9182-7b54-8cb9-1d0e07ba3ec6" xlink:to="loc_us-gaap_OciBeforeReclassificationsBeforeTaxAttributableToParent_019e421a-9182-73f9-9fda-2f45eeb36f5f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsTax_019e421a-9182-78f2-897f-5af02358ed54" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsTax"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OciBeforeReclassificationsNetOfTaxAttributableToParent_019e421a-9182-7b54-8cb9-1d0e07ba3ec6" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsTax_019e421a-9182-78f2-897f-5af02358ed54" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent_019feb79-9c72-7e31-bd91-c8f1d9a4b6bc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OciBeforeReclassificationsBeforeTaxAttributableToParent_019feb79-9c72-7957-8853-5b9cd3beef1f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OciBeforeReclassificationsBeforeTaxAttributableToParent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent_019feb79-9c72-7e31-bd91-c8f1d9a4b6bc" xlink:to="loc_us-gaap_OciBeforeReclassificationsBeforeTaxAttributableToParent_019feb79-9c72-7957-8853-5b9cd3beef1f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent_019feb79-9c72-71d6-b53a-7b535aa24fa9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent_019feb79-9c72-7e31-bd91-c8f1d9a4b6bc" xlink:to="loc_us-gaap_ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent_019feb79-9c72-71d6-b53a-7b535aa24fa9" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.am.com/role/LeasesScheduleofFutureMinimumPaymentsofOperatingLeasesDetails" xlink:type="simple" xlink:href="aii-20260630.xsd#LeasesScheduleofFutureMinimumPaymentsofOperatingLeasesDetails"/>
  <link:calculationLink xlink:role="http://www.am.com/role/LeasesScheduleofFutureMinimumPaymentsofOperatingLeasesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_019e421a-9182-7709-9076-f2d784e4d76e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear_019e421a-9182-7e04-9304-93098dae730f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_019e421a-9182-7709-9076-f2d784e4d76e" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear_019e421a-9182-7e04-9304-93098dae730f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_019e421a-9182-79ef-a6a7-ab870188e90d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_019e421a-9182-7709-9076-f2d784e4d76e" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_019e421a-9182-79ef-a6a7-ab870188e90d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_019e421a-9182-7e75-b3f9-8c0b5eda2cec" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_019e421a-9182-7709-9076-f2d784e4d76e" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_019e421a-9182-7e75-b3f9-8c0b5eda2cec" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_019e421a-9182-7f5c-8746-897bb6a319b9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_019e421a-9182-7709-9076-f2d784e4d76e" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_019e421a-9182-7f5c-8746-897bb6a319b9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_019e421a-9182-711f-8ad9-3df81bdbb0fc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_019e421a-9182-7709-9076-f2d784e4d76e" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_019e421a-9182-711f-8ad9-3df81bdbb0fc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_aii_LesseeOperatingLeaseLiabilityToBePaidDueAfterYearFour_019e421a-9182-7c33-b1ce-159e6c75c168" xlink:href="aii-20260630.xsd#aii_LesseeOperatingLeaseLiabilityToBePaidDueAfterYearFour"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_019e421a-9182-7709-9076-f2d784e4d76e" xlink:to="loc_aii_LesseeOperatingLeaseLiabilityToBePaidDueAfterYearFour_019e421a-9182-7c33-b1ce-159e6c75c168" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.am.com/role/LeasesScheduleofFutureMinimumPaymentsofOperatingLeasesDetails_1" xlink:type="simple" xlink:href="aii-20260630.xsd#LeasesScheduleofFutureMinimumPaymentsofOperatingLeasesDetails_1"/>
  <link:calculationLink xlink:role="http://www.am.com/role/LeasesScheduleofFutureMinimumPaymentsofOperatingLeasesDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_019e421a-9182-7625-9b89-8517732914b0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_019e421a-9182-79f8-95c0-796efe9e7360" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_019e421a-9182-7625-9b89-8517732914b0" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_019e421a-9182-79f8-95c0-796efe9e7360" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiability_019e421a-9182-7767-92e7-5fed261ca939" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLiability"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_019e421a-9182-7625-9b89-8517732914b0" xlink:to="loc_us-gaap_OperatingLeaseLiability_019e421a-9182-7767-92e7-5fed261ca939" xlink:type="arc"/>
  </link:calculationLink>
</link:linkbase>
