#1 Dividend equivalent rights (DERs) accrued on the restricted stock units granted under the 2006 Equity Incentive Plan and the 2021 Equity and Incentive Compensation Plan. DERs vest in the same manner as the restricted stock units to which they relate. Each DER is the economic equivalent of one share of ABM common stock.

#1 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.

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

#1 Each Restricted Stock Unit (RSU) represents a contingent right to receive, upon vesting of the award: (i) one share of common stock, and (ii) accrued cash in lieu of dividends.