SEC Form 4 · accession 0001628280-26-043360
Acadian Asset Management Inc. · AAMI
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Barbara Trebbi
Director
Period of report
Jun 12, 2026
Accepted (ET)
Jun 15, 2026 · 6:52 pm EDT
Rule 10b5-1 plan
box not checked
Issuer CIK
0001748824
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Common Stock | Jun 15, 2026 | G | 10,260 | $0.00 | D | 28,797 | D | |
| Common StockF1 | Jun 15, 2026 | G | 10,260 | $0.00 | A | 10,260 | I | Landry Trebbi 2012 Family Grantor Trust dated 12/31/2012 |
Table II — derivative securities
| Security | Conv. / exercise price | Date | Code | Shares | A/D | Exercisable | Expires | Underlying | Underlying shares | Owned after | D/I |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Restricted Stock UnitsF2,F3,F4 | — | Jun 12, 2026 | A | 1,288 | A | — | — | Common Stock | 1,288 | 1,288 | D |
Explanation of responses
- F1These shares are held in a trust for the benefit of the reporting person's child. The reporting person, the reporting person's spouse and a third party are trustees of the trust.
- F2Each restricted stock unit represents a right to receive one share of common stock of Acadian Asset Management Inc.
- F3Consists of restricted stock units under the Acadian Asset Management Inc. 2026 Equity Incentive Plan.
- F4On June 12, 2026, the reporting person was granted 1,288 restricted stock units vesting upon the earlier of June 12, 2027 and the date of the 2027 annual meeting of stockholders of Acadian Asset Management Inc.