X0508 4 2024-02-13 0000055135 KELLY SERVICES INC KELYA 0001826842 Williams Vanessa Peterson 999 WEST BIG BEAVER ROAD TROY MI 48084-4716 1 SVP, Gen Counsel & Corp Sec 0 Class A Common Stock, Par Value $1 2024-02-13 4 A 0 2080 0 A 44743 D Class A Common Stock, Par Value $1 2024-02-13 4 A 0 2377 0 A 47120 D Class A Common Stock, Par Value $1 2024-02-13 4 A 0 2582 0 A 49702 D Class A Common Stock, Par Value $1 2024-02-13 4 A 0 11413 20.81 A 61115 D Class A Common Stock, Par Value $1 2024-02-13 4 F 0 279 20.81 D 60836 D Class A Common Stock, Par Value $1 2024-02-13 4 F 0 698 20.81 D 60138 D Class A Common Stock, Par Value $1 2024-02-13 4 F 0 172 20.81 D 59966 D Class A Common Stock, Par Value $1 2024-02-13 4 F 0 187 20.81 D 59779 D Restricted stock units granted following satisfaction of specified performance criteria for 2021 and certification as earned by the Compensation and Talent Management Committee on February 13, 2024. Each restricted stock unit represents a contingent right to receive one share of Kelly Services Class A common stock. Restricted stock units granted following satisfaction of specified performance criteria for 2022 and certification as earned by the Compensation and Talent Management Committee. Shares vest 100% on the 3rd-anniversary date of the grant. Restricted stock units granted following satisfaction of specified performance criteria for 2023 and certification as earned by the Compensation and Talent Management Committee. Shares vest 100% on the 3rd-anniversary date of the grant. Restricted stock award granted under the Kelly Services Equity Incentive Plan. Shares vest ratably over three (3) years on the anniversary date of the grant. /s/ Cynthia D. Mull, attorney-in-fact for Ms. Williams 2024-02-15