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

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019fce9f-6af1-7fae-9c86-b42ef4126501,g:7a477b3f-5a4d-425d-8f75-a6a79b71876a-->
<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:roleRef roleURI="http://pwp.com/role/Cover" xlink:type="simple" xlink:href="pwp-20261029.xsd#Cover"/>
  <link:presentationLink xlink:role="http://pwp.com/role/Cover" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dei_CoverAbstract_019fce9f-6af1-7514-bb8b-04e2c92abd8c" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_CoverAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_019fce9f-6af1-7cc6-92d9-19080606d69b" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentType"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019fce9f-6af1-7514-bb8b-04e2c92abd8c" xlink:to="loc_dei_DocumentType_019fce9f-6af1-7cc6-92d9-19080606d69b" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_019fce9f-6af1-7986-a49d-0c7fe93e8b9f" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentPeriodEndDate"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019fce9f-6af1-7514-bb8b-04e2c92abd8c" xlink:to="loc_dei_DocumentPeriodEndDate_019fce9f-6af1-7986-a49d-0c7fe93e8b9f" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_019fce9f-6af1-7a76-a1eb-c0513d392d5c" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityFileNumber"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019fce9f-6af1-7514-bb8b-04e2c92abd8c" xlink:to="loc_dei_EntityFileNumber_019fce9f-6af1-7a76-a1eb-c0513d392d5c" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_019fce9f-6af1-705d-986b-4879d1ea355f" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityRegistrantName"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019fce9f-6af1-7514-bb8b-04e2c92abd8c" xlink:to="loc_dei_EntityRegistrantName_019fce9f-6af1-705d-986b-4879d1ea355f" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_019fce9f-6af1-79ed-9e82-51d2f59dc6fb" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019fce9f-6af1-7514-bb8b-04e2c92abd8c" xlink:to="loc_dei_EntityIncorporationStateCountryCode_019fce9f-6af1-79ed-9e82-51d2f59dc6fb" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_019fce9f-6af1-73eb-a96b-970ea60ab907" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:presentationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019fce9f-6af1-7514-bb8b-04e2c92abd8c" xlink:to="loc_dei_EntityTaxIdentificationNumber_019fce9f-6af1-73eb-a96b-970ea60ab907" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_019fce9f-6af1-7c0b-acb1-2d7974cc5f33" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressAddressLine1"/>
    <link:presentationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019fce9f-6af1-7514-bb8b-04e2c92abd8c" xlink:to="loc_dei_EntityAddressAddressLine1_019fce9f-6af1-7c0b-acb1-2d7974cc5f33" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_019fce9f-6af1-7de2-9f87-8cab66eeed91" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressCityOrTown"/>
    <link:presentationArc order="8" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019fce9f-6af1-7514-bb8b-04e2c92abd8c" xlink:to="loc_dei_EntityAddressCityOrTown_019fce9f-6af1-7de2-9f87-8cab66eeed91" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_019fce9f-6af1-7a38-94d9-affe3c80f5ca" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressStateOrProvince"/>
    <link:presentationArc order="9" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019fce9f-6af1-7514-bb8b-04e2c92abd8c" xlink:to="loc_dei_EntityAddressStateOrProvince_019fce9f-6af1-7a38-94d9-affe3c80f5ca" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_019fce9f-6af1-7ff1-8c49-4d8ffa1fe2fc" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressPostalZipCode"/>
    <link:presentationArc order="10" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019fce9f-6af1-7514-bb8b-04e2c92abd8c" xlink:to="loc_dei_EntityAddressPostalZipCode_019fce9f-6af1-7ff1-8c49-4d8ffa1fe2fc" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_019fce9f-6af1-71d3-b7f1-86337269f82b" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_CityAreaCode"/>
    <link:presentationArc order="11" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019fce9f-6af1-7514-bb8b-04e2c92abd8c" xlink:to="loc_dei_CityAreaCode_019fce9f-6af1-71d3-b7f1-86337269f82b" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_019fce9f-6af1-774b-a91b-d3d06883e073" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LocalPhoneNumber"/>
    <link:presentationArc order="12" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019fce9f-6af1-7514-bb8b-04e2c92abd8c" xlink:to="loc_dei_LocalPhoneNumber_019fce9f-6af1-774b-a91b-d3d06883e073" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_WrittenCommunications_019fce9f-6af1-72f4-8eca-7a5524afd6e2" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_WrittenCommunications"/>
    <link:presentationArc order="13" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019fce9f-6af1-7514-bb8b-04e2c92abd8c" xlink:to="loc_dei_WrittenCommunications_019fce9f-6af1-72f4-8eca-7a5524afd6e2" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SolicitingMaterial_019fce9f-6af1-7e0e-b6e3-6da1d9f82c79" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_SolicitingMaterial"/>
    <link:presentationArc order="14" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019fce9f-6af1-7514-bb8b-04e2c92abd8c" xlink:to="loc_dei_SolicitingMaterial_019fce9f-6af1-7e0e-b6e3-6da1d9f82c79" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementTenderOffer_019fce9f-6af1-7e38-b6be-88d9a70848a0" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_PreCommencementTenderOffer"/>
    <link:presentationArc order="15" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019fce9f-6af1-7514-bb8b-04e2c92abd8c" xlink:to="loc_dei_PreCommencementTenderOffer_019fce9f-6af1-7e38-b6be-88d9a70848a0" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementIssuerTenderOffer_019fce9f-6af1-75e1-829f-eada9df0e3fd" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_PreCommencementIssuerTenderOffer"/>
    <link:presentationArc order="16" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019fce9f-6af1-7514-bb8b-04e2c92abd8c" xlink:to="loc_dei_PreCommencementIssuerTenderOffer_019fce9f-6af1-75e1-829f-eada9df0e3fd" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_019fce9f-6af1-7545-a922-795fd112f12d" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_Security12bTitle"/>
    <link:presentationArc order="17" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019fce9f-6af1-7514-bb8b-04e2c92abd8c" xlink:to="loc_dei_Security12bTitle_019fce9f-6af1-7545-a922-795fd112f12d" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_019fce9f-6af1-7c64-afa9-170dd0a53ff4" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_TradingSymbol"/>
    <link:presentationArc order="18" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019fce9f-6af1-7514-bb8b-04e2c92abd8c" xlink:to="loc_dei_TradingSymbol_019fce9f-6af1-7c64-afa9-170dd0a53ff4" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_019fce9f-6af1-7f80-add2-d559832b424c" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_SecurityExchangeName"/>
    <link:presentationArc order="19" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019fce9f-6af1-7514-bb8b-04e2c92abd8c" xlink:to="loc_dei_SecurityExchangeName_019fce9f-6af1-7f80-add2-d559832b424c" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_019fce9f-6af1-795a-8dbd-704b174a5f7b" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:presentationArc order="20" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019fce9f-6af1-7514-bb8b-04e2c92abd8c" xlink:to="loc_dei_EntityEmergingGrowthCompany_019fce9f-6af1-795a-8dbd-704b174a5f7b" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_019fce9f-6af1-79dd-9f82-7149f929020b" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityCentralIndexKey"/>
    <link:presentationArc order="21" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019fce9f-6af1-7514-bb8b-04e2c92abd8c" xlink:to="loc_dei_EntityCentralIndexKey_019fce9f-6af1-79dd-9f82-7149f929020b" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_019fce9f-6af1-7d97-868d-7b4b16022759" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_CityAreaCode"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_019fce9f-6af1-71fe-86bf-83a2c7378dc5" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LocalPhoneNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_019fce9f-6af1-7a51-8e3d-a49d6769dcce" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_AmendmentFlag"/>
    <link:presentationArc order="22" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019fce9f-6af1-7514-bb8b-04e2c92abd8c" xlink:to="loc_dei_AmendmentFlag_019fce9f-6af1-7a51-8e3d-a49d6769dcce" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
</link:linkbase>
