ACM · Aecom

Represents restricted stock units, which vest on the earlier of March 3, 2027, or the date of the Issuer's 2027 Annual Meeting of Stockholders.

Represents restricted stock units, which vest on the earlier of March 3, 2027, or the date of the Issuer's 2027 Annual Meeting of Stockholders.

Represents restricted stock units, which vest on the earlier of March 3, 2027, or the date of the Issuer's 2027 Annual Meeting of Stockholders.

Represents restricted stock units, which vest on the earlier of March 3, 2027, or the date of the Issuer's 2027 Annual Meeting of Stockholders.

Represents restricted stock units, which vest on the earlier of March 3, 2027, or the date of the Issuer's 2027 Annual Meeting of Stockholders.

Represents restricted stock units, which vest on the earlier of March 3, 2027, or the date of the Issuer's 2027 Annual Meeting of Stockholders.

Represents restricted stock units, which vest on the earlier of March 3, 2027, or the date of the Issuer's 2027 Annual Meeting of Stockholders.

The price reported is a weighted average price. The shares were sold in multiple transactions at prices ranging from $98.35 to $98.48. The Reporting Person undertakes to provide to the Issuer, any security holder, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range noted in this footnote. The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 11, 2025.

The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 11, 2025.

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.

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.

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.

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.

Represents shares acquired pursuant to AECOM's Performance Earnings Program under the 2020 Stock Incentive Plan.

Represents shares acquired pursuant to AECOM's Performance Earnings Program under the 2020 Stock Incentive Plan.

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.

Represents shares acquired pursuant to AECOM's Performance Earnings Program under the 2020 Stock Incentive Plan.

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.

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.

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.

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.

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.

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.

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.

Represents shares acquired pursuant to AECOM's Performance Earnings Program under the 2020 Stock Incentive Plan.

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.

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.

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.

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.

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.

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.

The price reported is a weighted average price. The shares were sold in multiple transactions at prices ranging from $118.94 to $119.56. The Reporting Person undertakes to provide to the Issuer, any security holder, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range noted in this footnote. The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 11, 2025.

The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 11, 2025.

Represents the exercise of a stock option that was exercisable in equal tranches subject to (A) Mr. Rudd's continued employment with the Issuer through the first, second, third, fourth and fifth anniversaries of the 8/15/2020 option grant date, and (B) the volume-weighted average prices of AECOM's common stock on the New York Stock Exchange during any consecutive 20 trading day period exceeding certain price hurdles. The exercise of the stock options reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 11, 2024.

Represents the exercise of a stock option that was exercisable in equal tranches subject to (A) Mr. Rudd's continued employment with the Issuer through the first, second, third, fourth and fifth anniversaries of the 8/15/2020 option grant date, and (B) the volume-weighted average prices of AECOM's common stock on the New York Stock Exchange during any consecutive 20 trading day period exceeding certain price hurdles. The exercise of the stock options reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 11, 2024.

Represents restricted stock units, which vest on the earlier of February 28, 2026, or the date of the Issuer's 2026 Annual Meeting of Stockholders.

Represents restricted stock units, which vest on the earlier of February 28, 2026, or the date of the Issuer's 2026 Annual Meeting of Stockholders.

Represents restricted stock units, which vest on the earlier of February 28, 2026, or the date of the Issuer's 2026 Annual Meeting of Stockholders.

Represents restricted stock units, which vest on the earlier of February 28, 2026, or the date of the Issuer's 2026 Annual Meeting of Stockholders.

Represents restricted stock units, which vest on the earlier of February 28, 2026, or the date of the Issuer's 2026 Annual Meeting of Stockholders.

Represents restricted stock units, which vest on the earlier of February 28, 2026, or the date of the Issuer's 2026 Annual Meeting of Stockholders.

Represents restricted stock units, which vest on the earlier of February 28, 2026, or the date of the Issuer's 2026 Annual Meeting of Stockholders.

The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on August 20, 2024.

The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on August 20, 2024.

The price reported is a weighted average price. The shares were sold in multiple transactions at prices ranging from $110.39 to $111.37. The Reporting Person undertakes to provide to the Issuer, any security holder, or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separate price with the range noted in this footnote. The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on August 20, 2024.