0001593547 2026-03-19 2026-03-19 0001593547 aiciii:S000055328Member 2026-03-19 2026-03-19 0001593547 aiciii:S000055328Member aiciii:C000174120Member 2026-03-19 2026-03-19 0001593547 aiciii:S000055328Member aiciii:C000174121Member 2026-03-19 2026-03-19 0001593547 aiciii:S000055328Member aiciii:C000174122Member 2026-03-19 2026-03-19 iso4217:USD pure false 497 N-1A Advisors' Inner Circle Fund III 2026-03-19 0001593547 The Advisors’ Inner Circle Fund III Redwheel Global Emerging Equity Fund (the “Fund”) Supplement Dated March 19, 2026 to the Fund’s Summary Prospectus and Prospectus, each dated January 28, 2026 This supplement provides new and additional information beyond that contained in the Summary Prospectus and Prospectus, and should be read in conjunction with the Summary Prospectus and Prospectus. <table cellpadding="0" cellspacing="0" style="font: 11pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0pt; width: 100%"><tr style="vertical-align: top; text-align: justify"> <td style="width: 0in"></td><td style="width: 0.5in; text-align: left">I.</td><td style="text-align: justify">Effective immediately, the advisory fee for the Fund is reduced as follows:</td> </tr></table> <table cellpadding="2" cellspacing="0" style="border-right: Black 1pt solid; border-left: Black 1pt solid; font: 11pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse"> <tr style="vertical-align: top"> <td style="border-top: Black 1pt solid; border-bottom: Black 1pt solid; width: 50%; font-size: 11pt; text-align: center">Current Advisory Fee</td> <td style="border-top: Black 1pt solid; border-bottom: Black 1pt solid; width: 50%; font-size: 11pt; text-align: center">New Advisory Fee</td></tr> <tr style="vertical-align: top; background-color: Gainsboro"> <td style="border-bottom: Black 1pt solid; font-size: 11pt; text-align: center">0.90%</td> <td style="border-bottom: Black 1pt solid; font-size: 11pt; text-align: center">0.75%</td></tr> </table> Accordingly, effective immediately, the Summary Prospectus and Prospectus are hereby amended and supplemented as follows: <table cellpadding="0" cellspacing="0" style="font: 11pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0pt; width: 100%"><tr style="vertical-align: top; text-align: justify"> <td style="width: 0in"></td><td style="width: 0.5in; text-align: left">1.</td><td style="text-align: justify">In the “Fund Fees and Expenses” section of the Summary Prospectus and the Prospectus, the “Annual Fund Operating Expenses” table and the “Example” are hereby deleted and replaced with the following:</td> </tr></table> 2026-01-28 Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) 0.0075 0.0075 0.0075 0.0025 0 0 0.0049 0.0049 0.0034 0.0015 0.0015 0 0.0003 0.0003 0.0003 0.0031 0.0031 0.0031 0.0149 0.0124 0.0109 Management fees have been restated to reflect current fees. Example This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be: 152 471 806 1754 126 393 674 1454 111 347 594 1303 Management fees have been restated to reflect current fees. Until January 29, 2024, RWC Asset Advisors (US) LLC (“RWC US”), the investment adviser to the Fund, had contractually agreed to waive its fees and/or reimburse expenses to the extent necessary to keep total annual Fund operating expenses (excluding certain excluded expenses) from exceeding 1.25% of the average daily net assets of each of the Fund’s share classes. This agreement was terminated by RWC US effective as of January 29, 2024. Pursuant to the terms of the agreement, RWC US has the ability to recoup all or a portion of its prior fee waivers or expense reimbursements made during the three-year period preceding the recoupment subject to certain terms and conditions. The amounts above reflect previously waived fees and/or reimbursed expensed recovered by RWC US from the Fund during the fiscal year ended September 30, 2025.