# EDGAR Filing Document

**Accession Number:** 0001593547
**File Stem:** 0001398344-25-012976
**Filing Date:** 2025-7
**Character Count:** 3354
**Document Hash:** 208ab623c45f517b7b44b9f94c28ed06
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001398344-25-012976.hdr.sgml**: 20250710

**ACCESSION NUMBER**: 0001398344-25-012976

**CONFORMED SUBMISSION TYPE**: DEFA14A

**PUBLIC DOCUMENT COUNT**: 3

**FILED AS OF DATE**: 20250710

**DATE AS OF CHANGE**: 20250710

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Advisors' Inner Circle Fund III
- **CENTRAL INDEX KEY:** 0001593547

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** DE

**FILING VALUES:**
- **FORM TYPE:** DEFA14A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 811-22920
- **FILM NUMBER:** 251115575

**BUSINESS ADDRESS:**
- **STREET 1:** ONE FREEDOM VALLEY DRIVE
- **CITY:** OAKS
- **STATE:** PA
- **ZIP:** 19456
- **BUSINESS PHONE:** (800) 342-5734

**MAIL ADDRESS:**
- **STREET 1:** ONE FREEDOM VALLEY DRIVE
- **CITY:** OAKS
- **STATE:** PA
- **ZIP:** 19456

## Series and Classes Contracts Data

### Mesirow High Yield Fund (Series ID: S000063586)

| Class ID   | Class Name           | Ticker Symbol   |
|:---|:---|:---|
| C000206015 | Investor Shares      | MFHVX           |
| C000206016 | Institutional Shares | MFHIX           |

**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

**Washington, D.C. 20549**

**SCHEDULE 14A INFORMATION**

Proxy Statement Pursuant to Section 14(a) of the

Securities Exchange Act of 1934 (Amendment No. __)

Filed by the Registrant [X]

Filed by a Party other than the Registrant [ ]

Check the appropriate box:

[ ] Preliminary Proxy Statement

[ ] Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

[ ] Definitive Proxy Statement

[X] Definitive Additional Materials

[ ] Soliciting Material under § 240.14a-12

**THE ADVISORS' INNER CIRCLE FUND III**

(Name of Registrant as Specified In Its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (Check all boxes that apply):

[X] No fee required <br> [ ] Fee paid previously with preliminary materials <br> [ ] Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11

![](fp0094101-1_01.jpg)

**Mesirow High Yield Fund Investment**

June 30, 2025

Dear Shareholder,

I apologize for the additional follow-up letter related to your investment in the Mesirow High Yield Fund. We still need your important proxy vote for the special meeting of shareholders. **Instructions are provided below.**

MetLife Investment Management has recently acquired the Mesirow team, and fund, which requires shareholders to vote the proxy. If I can be of any assistance in helping to answer questions or provide additional information, please reach out to me at the contact information provided below. **Please help us by casting your vote today.** The team at MetLife Investment Management/Mesirow appreciates your attention to this matter.

Respectfully,

![](fp0094101-1_02.jpg)

**Frank Natale**

**Senior Director, Institutional Client Group**

**MetLife Investment Management**

1717 Arch Street, Suite 1500, Philadelphia, PA 19103

**P:** +1-267-330-0065

**M:** +1-215-680-6181

frank.natale@metlife.com

**To cast your vote, please call: 1-866-356-7814** between Monday–Friday, 9 A.M.–11 P.M. ET, or Saturday, 10 A.M.–6 P.M. ET.

SHAREHOLDER INFO HERE

*Securities offered through MetLife Investments Securities, LLC ("MISL"), a FINRA/SIPC member firm.*