X0508 4 2026-02-24 0001647088 WillScot Holdings Corp WSC 0001723491 Boswell Timothy D 6400 E MCDOWELL RD., 3RD FLOOR SCOTTSDALE AZ 85257 true true false false President & CEO false Common Stock 2026-02-24 4 M false 2660 A 14125 D Common Stock 2026-02-24 4 F false 1131 23.73 D 12994 D Common Stock 2026-02-24 4 M false 4678 A 17672 D Common Stock 2026-02-24 4 F false 2206 23.73 D 15466 D Common Stock 295862 I By EAB Irrevocable Trust Restricted Stock Units 2026-02-24 4 M false 2660 0 D Common Stock 2660 30721 D Restricted Stock Units 2026-02-24 4 M false 4678 0 D Common Stock 4678 26043 D Restricted Stock Units 2026-02-24 4 A false 35952 0 A Common Stock 35952 61995 D Performance Stock Units 2026-02-24 4 A false 83888 0 A Common Stock 83888 396592 D Stock Options (right to buy) 13.6 2028-03-20 Common Stock 125691 125691 D Each time-based restricted stock unit ("RSU") represents a contingent right to receive upon vesting one share of common stock of the Issuer, par value $0.0001 per share, or its cash equivalent. Reflects the transfer of shares to the trust in a transaction exempt from Section 16 pursuant to Rule 16a-13.? On February 24, 2023, the Reporting Person was granted 10,642 RSUs which vest in four equal installments on each of the first four anniversaries of the grant date subject to the terms and conditions of the previously disclosed Plan and the Restricted Stock Unit Agreement entered into between the Issuer and the Reporting Person. On February 24, 2025, the Reporting Person was granted 18,713 RSUs which vest annually in four equal installments on each of the first four anniversaries of the grant date subject to the terms and conditions of the Plan and the Restricted Stock Unit Agreement entered into between the Issuer and the Reporting Person. On February 24, 2026, the Reporting Person was granted 35,952 RSUs which vest annually in three equal installments on each of the first three anniversaries of the grant date subject to the terms and conditions of the Plan and the Restricted Stock Unit Agreement entered into between the Issuer and the Reporting Person. Each performance-based restricted stock unit ("PSU") represents a contingent right to receive upon vesting one share of common stock of the Issuer, par value $0.0001 per share, or its cash equivalent. On February 24, 2026, the Reporting Person was granted a target number of 83,888 PSUs which vest based on the achievement of certain company specific performance metrics. The stock options (the "Options"), reported on this Form 4, represent the right upon vesting to buy shares of Class A Common Stock pursuant to the terms and conditions of the Plan and the Nonqualified Stock Option Award Agreement entered into between the Issuer and the Reporting Person as of March 20, 2018 (the "Award Agreement"). The Options vested in equal installments on each of the first four anniversaries of the grant date subject to the terms and conditions of the Plan and Award Agreement. Peter D. Fetzer as Attorney-in-Fact 2026-02-26