ABM · Abm Industries Inc /De/

The sale of shares reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on April 15, 2026.

Includes shares acquired pursuant to dividend reinvestment in transactions exempt from Section 16 pursuant to Rule 16a-11.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $45.30 to $45.36, inclusive. The reporting person undertakes to provide ABM Industries Incorporated, any security holder of ABM Industries Incorporated, 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 ranges set forth in footnote 1 of this Form 4.

Includes shares acquired pursuant to dividend reinvestment in transactions exempt from Section 16 pursuant to Rule 16a-11.

Includes shares acquired pursuant to dividend reinvestment in transactions exempt from Section 16 pursuant to Rule 16a-11.

The sales of shares reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on December 24, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $46.61 to $46.77, inclusive. The reporting person undertakes to provide ABM Industries Incorporated, any security holder of ABM Industries Incorporated, 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 ranges set forth in footnote 2 of this Form 4.

The sales of shares reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on December 24, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $45.60 to $46.595, inclusive. The reporting person undertakes to provide ABM Industries Incorporated, any security holder of ABM Industries Incorporated, 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 ranges set forth in footnote 3 of this Form 4.

Includes shares acquired pursuant to dividend reinvestment in transactions exempt from Section 16 pursuant to Rule 16a-11.

The sale of shares reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $46.895 to $47.415, inclusive. The reporting person undertakes to provide ABM Industries Incorporated, any security holder of ABM Industries Incorporated, 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 ranges set forth in footnote 1 of this Form 4.

Includes shares acquired pursuant to dividend reinvestment in transactions exempt from Section 16 pursuant to Rule 16a-11.

The sale of shares reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $43.755 to $44.54, inclusive. The reporting person undertakes to provide ABM Industries Incorporated, any security holder of ABM Industries Incorporated, 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 ranges set forth in footnote 1 of this Form 4.

Includes shares acquired pursuant to dividend reinvestment in transactions exempt from Section 16 pursuant to Rule 16a-11.

Represents shares of Issuer common stock acquired pursuant to vesting of relative-total stockholder return modified performance shares that were granted to the reporting person in January 2023 and have vested based upon the satisfaction of performance criteria specified for the award at the time of grant.

Represents shares of Issuer common stock acquired pursuant to vesting of performance shares that were granted to the reporting person in January 2023 and have vested based upon the satisfaction of performance criteria specified for the award at the time of grant.

Represents shares of Issuer common stock acquired pursuant to vesting of performance shares that were granted to the reporting person in January 2023 and have vested based upon the satisfaction of performance criteria specified for the award at the time of grant.

Includes shares acquired pursuant to dividend reinvestment in transactions exempt from Section 16 pursuant to Rule 16a-11.

Represents shares of Issuer common stock acquired pursuant to vesting of relative-total stockholder return modified performance shares that were granted to the reporting person in January 2023 and have vested based upon the satisfaction of performance criteria specified for the award at the time of grant.

On January 12, 2026, the reporting person filed a Form 4 which inadvertently omitted an additional 1,007 shares withheld to satisfy tax obligations in connection with the vesting of restricted stock unit awards and relative-total stockholder return modified performance shares.

The error described in footnote 1 also affected certain reported total holdings in the original Form 4 and a subsequent Form 4 filed on January 15, 2026.

Includes shares acquired pursuant to dividend reinvestment in transactions exempt from Section 16 pursuant to Rule 16a-11.

Includes shares acquired pursuant to dividend reinvestment in transactions exempt from Section 16 pursuant to Rule 16a-11.

Represents shares of Issuer common stock acquired pursuant to vesting of performance shares that were granted to the reporting person in January 2023 and have vested based upon the satisfaction of performance criteria specified for the award at the time of grant.

Includes shares acquired pursuant to dividend reinvestment in transactions exempt from Section 16 pursuant to Rule 16a-11.

Represents shares of Issuer common stock acquired pursuant to vesting of performance shares that were granted to the reporting person in January 2023 and have vested based upon the satisfaction of performance criteria specified for the award at the time of grant.

Represents shares of Issuer common stock acquired pursuant to vesting of relative-total stockholder return modified performance shares that were granted to the reporting person in January 2023 and have vested based upon the satisfaction of performance criteria specified for the award at the time of grant.

Represents shares of Issuer common stock acquired pursuant to vesting of relative-total stockholder return modified performance shares that were granted to the reporting person in January 2023 and have vested based upon the satisfaction of performance criteria specified for the award at the time of grant.

Includes shares acquired pursuant to dividend reinvestment in transactions exempt from Section 16 pursuant to Rule 16a-11.

Includes shares acquired pursuant to dividend reinvestment in transactions exempt from Section 16 pursuant to Rule 16a-11.

Restricted stock units (RSUs) granted under the 2021 Equity and Incentive Compensation Plan, representing a contingent right to receive shares of common stock. Such RSUs vest in three equal annual installments beginning a year from the grant date, and will settle in shares of common stock. Dividend equivalent rights will accrue.

Restricted stock units (RSUs) granted under the 2021 Equity and Incentive Compensation Plan, representing a contingent right to receive shares of common stock. Such RSUs vest in three equal annual installments beginning a year from the grant date, and will settle in shares of common stock. Dividend equivalent rights will accrue.

Restricted stock units (RSUs) granted under the 2021 Equity and Incentive Compensation Plan, representing a contingent right to receive shares of common stock. Such RSUs vest in three equal annual installments beginning a year from the grant date, and will settle in shares of common stock. Dividend equivalent rights will accrue.

Restricted stock units (RSUs) granted under the 2021 Equity and Incentive Compensation Plan, representing a contingent right to receive shares of common stock. Such RSUs vest in three equal annual installments beginning a year from the grant date, and will settle in shares of common stock. Dividend equivalent rights will accrue.

Restricted stock units (RSUs) granted under the 2021 Equity and Incentive Compensation Plan, representing a contingent right to receive shares of common stock. Such RSUs vest in three equal annual installments beginning a year from the grant date, and will settle in shares of common stock. Dividend equivalent rights will accrue.

Restricted stock units (RSUs) granted under the 2021 Equity and Incentive Compensation Plan, representing a contingent right to receive shares of common stock. Such RSUs vest in three equal annual installments beginning a year from the grant date, and will settle in shares of common stock. Dividend equivalent rights will accrue.

Restricted stock units (RSUs) granted under the 2021 Equity and Incentive Compensation Plan, representing a contingent right to receive shares of common stock. Such RSUs vest in three equal annual installments beginning a year from the grant date, and will settle in shares of common stock. Dividend equivalent rights will accrue.

Restricted stock units (RSUs) granted under the 2021 Equity and Incentive Compensation Plan, representing a contingent right to receive shares of common stock. Such RSUs vest in three equal annual installments beginning a year from the grant date, and will settle in shares of common stock. Dividend equivalent rights will accrue.

Annual grant of restricted stock units (RSUs) to non-employee directors granted under the 2021 Equity and Incentive Compensation Plan, representing a contingent right to receive shares of common stock. All such RSUs vest on the first anniversary of the grant date. Dividend equivalent rights (DERs) will accrue.

Annual grant of restricted stock units (RSUs) to non-employee directors granted under the 2021 Equity and Incentive Compensation Plan, representing a contingent right to receive shares of common stock. All such RSUs vest on the first anniversary of the grant date. Dividend equivalent rights (DERs) will accrue.

Includes shares acquired pursuant to dividend reinvestment in transactions exempt from Section 16 pursuant to Rule 16a-11.

Annual grant of restricted stock units (RSUs) to non-employee directors granted under the 2021 Equity and Incentive Compensation Plan, representing a contingent right to receive shares of common stock. All such RSUs vest on the first anniversary of the grant date. Dividend equivalent rights (DERs) will accrue.

Includes shares acquired pursuant to dividend reinvestment in transactions exempt from Section 16 pursuant to Rule 16a-11.

Annual grant of restricted stock units (RSUs) to non-employee directors granted under the 2021 Equity and Incentive Compensation Plan, representing a contingent right to receive shares of common stock. All such RSUs vest on the first anniversary of the grant date. Dividend equivalent rights (DERs) will accrue.

Annual grant of restricted stock units (RSUs) to non-employee directors granted under the 2021 Equity and Incentive Compensation Plan, representing a contingent right to receive shares of common stock. All such RSUs vest on the first anniversary of the grant date. Dividend equivalent rights (DERs) will accrue.

Includes shares acquired pursuant to dividend reinvestment in transactions exempt from Section 16 pursuant to Rule 16a-11.

Annual grant of restricted stock units (RSUs) to non-employee directors granted under the 2021 Equity and Incentive Compensation Plan, representing a contingent right to receive shares of common stock. All such RSUs vest on the first anniversary of the grant date. Dividend equivalent rights (DERs) will accrue.

Annual grant of restricted stock units (RSUs) to non-employee directors granted under the 2021 Equity and Incentive Compensation Plan, representing a contingent right to receive shares of common stock. All such RSUs vest on the first anniversary of the grant date. Dividend equivalent rights (DERs) will accrue.

Includes shares acquired pursuant to dividend reinvestment in transactions exempt from Section 16 pursuant to Rule 16a-11

Includes shares acquired pursuant to dividend reinvestment in transactions exempt from Section 16 pursuant to Rule 16a-11.