Kelly Services, Inc.

Item 5.03 Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year. On May 7, 2026, at the annual meeting of stockholders (the “Annual Meeting”) of Kelly Services, Inc. (the “Company”), which was held in virtual-only format, the Company’s stockholders approved an amendment to the Company’s Amended and Restated Certificate of Incorporation (the “Amendment”) to (i) permit stockholder action by written consent, (ii) expand the persons who may call special meetings of stockholders to include the Chairperson of the Board of Directors (the “Board”) and holders of at least a majority of the voting power of the Company’s Class B Common Stock (in addition to the Board or a duly authorized committee), and (iii) permit stockholders to fill vacancies or newly created directorships in any manner permitted by Delaware law (in addition to the Board’s ability to fill vacancies). The Amendment is reflected in the Amended and Restated Certificate of Incorporation that became effective upon filing with the Secretary of State of the State of Delaware on May 13, 2026. The Board approved Amended and Restated Bylaws of the Company, reflecting conforming changes consistent with the Amendment, effective as of May 7, 2026. The foregoing description does not purport to be complete and is qualified in its entirety by reference to the full text of the Amended and Restated Certificate of Incorporation and Amended and Restated Bylaws, which are attached hereto as Exhibit 3.1 and Exhibit 3.2, respectively, and are incorporated herein by reference.

Item 5.07 Submission of Matters to a Vote of Security Holders. The Company held the Annual Meeting on May 7, 2026. The final results of voting on each of the matters submitted to a vote of stockholders during the Annual Meeting are provided below. Proposal 1 All of the nominees for election to the Board were elected to serve until the Company’s next annual meeting of stockholders, as follows: Name of Nominee Number of Shares Number of Shares Broker Non-Votes Voted “For” Voted “Withheld” ──────────────────────────────────────────────────────────────────────────────────────────── James Christopher Hunt 3,046,545 7,565 131,552 Christopher D. Layden 3,053,958 152 131,552 Angela Brock-Kyle 3,053,759 351 131,552 Robert S. Cubbin 3,053,199 911 131,552 Amala Duggirala 3,053,082 1,028 131,552 Edward Escudero 3,053,709 401 131,552 James K. Hunt 3,053,776 334 131,552 Ryan B. McCrory 3,053,765 345 131,552 Leslie A. Murphy 3,053,195 915 131,552 Michael J. Wartell 3,053,766 344 131,552 George Young III 3,053,776 334 131,552 Proposal 2 The Company’s stockholders approved, on an advisory basis, the Company’s executive compensation, as follows: Shares Voting “For” 3,052,698 Shares Voting “Against” 941 Shares Abstaining From Voting 471 Broker Non-Votes 131,552 Proposal 3 The Company’s stockholders approved the Amendment to the Company’s Amended and Restated Certificate of Incorporation, as follows: Shares Voting “For” 3,046,639 Shares Voting “Against” 7,004 Shares Abstaining From Voting 467 Broker Non-Votes 131,552 Proposal 4 The Company’s stockholders ratified the appointment of PricewaterhouseCoopers LLP as the Company’s independent registered public accounting firm for the 2026 fiscal year, as follows: Shares Voting “For” 3,182,579 Shares Voting “Against” 3,072 Shares Abstaining From Voting 11 Broker Non-Votes 0