KELLY SERVICES INC

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

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Kelly Services Inc.

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Letter to Shareholders

April 13, 2026

Dear Shareholders:

2025 was a year of transition for Kelly as the Company navigated a dynamic macroeconomic environment and an evolving global and domestic policy landscape. Against this backdrop, we took decisive action to stabilize and strengthen the business, accelerate technology modernization, and position Kelly for growth. 2025 also marked the beginning of a new era of leadership at Kelly as the Company successfully completed a planned CEO succession process. Throughout the year, the Kelly team demonstrated unwavering focus and agility, opportunistically seeking out and capturing demand, driving structural efficiencies, and laying the groundwork for an exciting chapter ahead.

Stabilizing and Strengthening the Business

In 2025, Kelly focused on driving growth in more resilient markets. Kelly Education delivered year-over-year revenue growth, driven by continued fill rate improvement and solid demand for our market-leading K-12 staffing and pediatric therapy specialties. In the third quarter, Education achieved a portfolio-wide 90% fill rate for the first time, a testament to the operational excellence and deep customer relationships that have made this business one of the best organic growth stories in our industry.

We stabilized the underlying performance of our Science Engineering and Telecom (SET) and Enterprise Talent Management (ETM) businesses as we navigated discrete demand reductions from the federal government and three large customers. Within SET, both our telecom and engineering specialties grew over the prior full-year period, with telecom achieving double-digit growth on robust demand from large carriers. Within ETM, outcome-based solutions, excluding contact center, and payroll process outsourcing also grew on a full-year basis, while our Managed Services Provider specialty gained momentum through new customer wins. Across both segments, we continued to align resources with demand and drove structural efficiencies in our operating model.

Kelly’s scale and capabilities continued to earn recognition from the industry. Everest Group named Kelly both a Leader and Star Performer in each of its Contingent Talent and Strategic Solutions PEAK Matrices, marking the first time a company has achieved this feat, and recognized Kelly as a Leader and Star Performer in RPO. In addition, HRO Today named Kelly the number one global provider of total workforce solutions, encompassing MSP, RPO, and Staffing. These accolades reflect the breadth and depth of our differentiated offerings and the trust that the world’s leading employers place in Kelly to meet their workforce needs.

Accelerating Technology Modernization

We reached a significant milestone in our technology modernization initiative in 2025, completing the cutover of our SET acquisitions to the unified, best-in-class technology platform Kelly acquired through the acquisition of Motion Recruitment Partners. This marks the first phase of a multi-phase strategy to move our enterprise from a fragmented mix of legacy front-, middle-, and back-office technologies to a modern, integrated platform. With our SET acquisitions fully operational within the platform, the business is now benefiting from deeper data and insights, AI and automation at scale, and enhanced productivity. These benefits will extend across SET and the enterprise as we execute our phased approach.

We accelerated the integration of human-centric AI across the enterprise as well. In the fourth quarter, we launched Grace Boost, a proprietary internal AI platform deployed to every Kelly employee. The platform integrates generative AI into the applications our people use every day to enhance productivity and streamline workflows. We also deployed a scalable and configurable AI recruiting solution that leverages the combined power of people and technology to deliver faster, more cost-effective results for large employers. These practical applications reflect Kelly’s commitment to putting AI directly into the hands of our employees and customers to solve real business challenges.

Positioning for Growth in 2026 and Beyond

As we enter 2026, we are taking deliberate steps to position Kelly to capitalize on the growth opportunities ahead. Following a successful CEO transition, we are continuing to evolve our leadership team through key appointments. In February, Pat McCall joined Kelly as Chief Growth Officer, bringing 30 years of sales and operations experience and a proven track record of accelerating profitable growth at leading global staffing firms. And in March, Joel Leege was appointed President of SET bringing nearly three decades of experience in specialty staffing and solutions, and a track record of driving above-market growth. Together, Kelly’s refreshed management team is aligned and energized to accelerate progress on our growth strategy.

Kelly’s Board of Directors also continues to evolve while remaining steadfast in its commitment to sound governance. On January 30, 2026, Kelly entered into a letter of agreement with Hunt Equity Opportunities, LLC (“Hunt”) related to its purchase of the controlling stake of the Company’s Class B common stock previously held by the Terence E. Adderley Revocable Trust K. As part of the agreement, the Board was reconstituted to consist of four new Directors designated by Hunt, including the Chairman of the Board; Kelly’s CEO; and three Directors serving on the

Board as of the letter agreement date. In connection with these changes, Terrence B. Larkin, Gerald S. Adolph, George S. Corona, InaMarie F. Johnson, and Peter W. Quigley resigned from the Board. We thank them for their dedicated service and contributions to Kelly—particularly Mr. Quigley following a distinguished 23-year career with the Company, including the last five as President and CEO.

Looking ahead, we have clear organic growth drivers and a pathway totop-line growth and margin expansion in the second half of 2026. In Education, our pipeline ofnet-new K-12 opportunities remains strong. In SET, we are sharpening our focus on high-growth areas including data centers, AI, and cybersecurity. In ETM, significant new MSP and enterprise staffing wins are coming online, including one of the largest MSP contracts in Kelly’s history. As the discrete demand reductions that impacted our results in 2025 begin to anniversary, we expect the path to improved year-over-year performance to become clearer. Our strategic initiatives to enhance how we go to market as one Kelly enterprise, modernize our technology, and recenter our culture around customer centricity, visibility, and accountability are designed to ensure we capitalize on that inflection.

Later this year, we will celebrate 80 years of Kelly’s leadership in workforce strategy and solutions. This milestone is a testament to the endurance of our mission to connect people to work in ways that enrich their lives. It also reflects our capacity to transform how we go to market and meet our customers’ evolving needs as the pace of change continues to accelerate. As we prepare to mark this occasion, we have never been more optimistic about Kelly’s future. We move forward with confidence in our strategy, underpinned by a strong balance sheet, healthy cash generation, and a balanced approach to capital allocation. The investments we are making in our people, portfolio, and technology are positioning Kelly to drive profitable growth and to realize the Company’s full potential.

We thank you for your support and trust at this important moment on Kelly’s journey. As we build on our momentum, we look forward to delivering on the promise of 2026 and accelerating progress on our journey to create long-term value for all our stakeholders.

With appreciation,

“Our team’s resilience and determination through a year of transition have set the stage for what comes next. With a refreshed leadership team, a modernized technology platform, and clear organic growth drivers across our businesses, Kelly is well positioned to realize its full potential. I am confident that 2026 will mark an inflection point on our journey to accelerate profitable growth.”

Chris Layden, President and CEO

Notice of Annual Meeting of Shareholders

2026 Annual Meeting of Shareholders

If you were a holder of record of the Company’s Class B Common Stock at the close of business on the Record Date, March 19, 2026, you are entitled to vote at the Annual Meeting.

Please promptly submit your vote by internet, telephone, or by signing, dating, and returning the enclosed proxy card or voting instructions form in the postage-paid envelope provided so that your shares will be represented and voted at the meeting.

Thank you for your interest in Kelly.

By Order of the Board of Directors,

VANESSA P. WILLIAMS

Corporate Secretary