David Y. Gan - 15 Dec 2025 Form 4 Insider Report for AECOM (ACM)

Role
CHIEF LEGAL OFFICER
Signature
Matt Benson, Attorney-in-Fact for David Gan
Issuer symbol
ACM
Transactions as of
15 Dec 2025
Net transactions value
-$2,546,408
Form type
4
Filing time
17 Dec 2025, 16:06:58 UTC
Previous filing
18 Dec 2024
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Gan David Y. CHIEF LEGAL OFFICER C/O AECOM, 13355 NOEL RD, SUITE 400, DALLAS Matt Benson, Attorney-in-Fact for David Gan 17 Dec 2025 0001805823

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction ACM Common Stock Options Exercise $0 +5,976 +15% $0.000000 46,991 15 Dec 2025 Direct F1
transaction ACM Common Stock Award $0 +6,534 +14% $0.000000 53,525 15 Dec 2025 Direct F2
transaction ACM Common Stock Award $0 +14,056 +26% $0.000000 67,581 15 Dec 2025 Direct F3
transaction ACM Common Stock Tax liability $1,031,519 -10,530 -16% $97.96 57,051 15 Dec 2025 Direct F4
transaction ACM Common Stock Sale $593,100 -6,000 -11% $98.85 51,051 15 Dec 2025 Direct F5
transaction ACM Common Stock Sale $921,789 -9,502 -19% $97.01 41,549 17 Dec 2025 Direct F5
holding ACM Common Stock 577 15 Dec 2025 by Merrill Lynch under AECOM Retirement & Savings Plan (RSP)

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction ACM Restricted Stock Units Options Exercise -5,976 -100% 0 15 Dec 2025 Common Stock 5,976 Direct F1
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Buy Plan / Sale Plan: These are also open market purchases/sales of shares, but in this case the transaction is part of a trading plan. Rule 10b5-1 allows insiders to setup a trading plan to buy/sell stocks over a certain period of time. Since the purchases/sales are predetermined, this protects the insiders from violating insider trading law.

Transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c).

Explanation of Responses:

Id Content
F1 Each restricted stock unit represents a contingent right to receive, upon vesting, one share of the Issuer's common stock. These restricted stock units were granted on December 15, 2022, and vested in full on December 15, 2025.
F2 Represents annual grant of restricted stock units. Each restricted stock unit represents a contingent right to receive, upon vesting, one share of the Issuer's common stock in accordance with the Issuer's 2020 Stock Incentive Plan. The restricted stock units vest in full on December 15, 2028, subject to continued service through the vesting date.
F3 Represents shares acquired pursuant to AECOM's Performance Earnings Program under the 2020 Stock Incentive Plan.
F4 Represents shares of common stock withheld by the Issuer to satisfy certain tax withholding obligations in connection with the vesting of the restricted stock units and shares acquired under the Performance Earnings Program.
F5 The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on August 15, 2025.