When did Acadian Asset Management Inc file this DEFA14A?

Acadian Asset Management Inc (AAMI) filed this Additional Proxy Materials (DEFA14A) with the SEC on April 29, 2026. The accession number assigned by EDGAR is 0001628280-26-028382.

What does a DEFA14A disclose?

DEFA14A is additional definitive proxy soliciting material filed in connection with a shareholder meeting — supplemental letters, slides, or amendments issued after the main proxy statement.

What is the key takeaway from this filing?

No material developments for governance or investors. This is Boardroom Alpha's one-line summary of the additional proxy materials; see the full filing text above for the formal disclosure.

Where can I find Acadian Asset Management Inc's prior proxy statements on EDGAR?

The SEC EDGAR browser lists every DEFA14A Acadian Asset Management Inc has filed under CIK 1748824, sortable by date. Use the "View on SEC EDGAR" link in the page header, or browse directly via https://www.sec.gov/cgi-bin/browse-edgar.

Boardroom Alpha

AAMI · Additional Proxy Materials (DEFA14A) · Filed April 29, 2026

Acadian Asset Management Inc — Additional Proxy Materials (DEFA14A)

Form

DEFA14A

Filed

April 29, 2026

Ticker

AAMI

Accession

0001628280-26-028382

Acadian Asset Management Inc on Boardroom Alpha View on SEC EDGAR

Boardroom Alpha · Filing insights

No material developments for governance or investors.

About Acadian Asset Management Inc

Market cap

$2.6B

1Y TSR

+123.0%

3Y TSR

+48.2%

Board grade

A-

Sector

Financial Services

CEO

Kelly Young

Last annual meeting: Jun 11, 2026 · View full Acadian Asset Management Inc profile →

Document

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of

the Securities Exchange Act of 1934 (Amendment No. )


Filed by the Registrant ý
Filed by a Party other than the Registrant o
Check the appropriate box:
o			Preliminary Proxy Statement
o			Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))
o			Definitive Proxy Statement
ý			Definitive Additional Materials
o			Soliciting Material under §240.14a-12


ACADIAN ASSET MANAGEMENT INC.
(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):
ý			No fee required
o			Fee paid previously with preliminary materials
o			Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11

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More filings

Other filings from Acadian Asset Management Inc (AAMI)

8-KCurrent Report
May 19, 2026
10-QQuarterly Report
May 7, 2026
8-KCurrent Report
Apr 30, 2026
DEF 14AProxy Statement
Apr 29, 2026
10-KAnnual Report
Feb 27, 2026
8-KCurrent Report
Feb 5, 2026
8-KCurrent Report
Nov 25, 2025
10-QQuarterly Report
Nov 6, 2025
8-KCurrent Report
Oct 30, 2025
10-QQuarterly Report
Aug 7, 2025
8-KCurrent Report
Jul 31, 2025
8-KCurrent Report
May 16, 2025

Continue researching

Reference

Frequently asked questions

When did Acadian Asset Management Inc file this DEFA14A?: Acadian Asset Management Inc (AAMI) filed this Additional Proxy Materials (DEFA14A) with the SEC on April 29, 2026. The accession number assigned by EDGAR is 0001628280-26-028382.
What does a DEFA14A disclose?: DEFA14A is additional definitive proxy soliciting material filed in connection with a shareholder meeting — supplemental letters, slides, or amendments issued after the main proxy statement.
What is the key takeaway from this filing?: No material developments for governance or investors. This is Boardroom Alpha's one-line summary of the additional proxy materials; see the full filing text above for the formal disclosure.
Where can I find Acadian Asset Management Inc's prior proxy statements on EDGAR?: The SEC EDGAR browser lists every DEFA14A Acadian Asset Management Inc has filed under CIK 1748824, sortable by date. Use the "View on SEC EDGAR" link in the page header, or browse directly via https://www.sec.gov/cgi-bin/browse-edgar.

Disclaimer

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