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Keith Woodward Senior VP, CFO 763-540-1205 701 N. Lilac Drive
Minneapolis, MN 55422
Kathryn Lovik Director, Global Communications 763.540.1212

Board of Directors

Azita Arvani,, 56, Director Since 2012, , Former Head of Innovation Partner & Venture Management for Nokia

Member of the Compensation, Executive and Governance Committees.

Ms. Arvani, through her work with Nokia Network and prior responsibilities, brings extensive experience in disruptive technologies, commercializing innovations, partnerships and ecosystems. As an executive leader and a consultant, she has helped a diverse set of companies develop and commercialize game-changing technologies. Her experience in new technologies and innovations is particularly valuable as we evolve our telemetry, robotics and other sustainable cleaning technologies.

William F. Austen ,, 60, Director Since 2007 , , President, Chief Executive Officer and member of the Board of Directors of Bemis Company, Inc.

Member of the Audit, Compensation and Executive Committees.

Mr. Austen brings a broad strategic perspective as the top leader at Bemis Company where he serves as President and Chief Executive Officer. He is a talented leader in global manufacturing and operations with experience in global mergers, acquisitions and business integration. This experience is relevant to our business, including our international operations and growth initiatives.

Carol S. Eicher,, 60, Director Since 2008 , , Former Non-Executive Board Chairman of Innocor, Inc. (a Bain Capital portfolio company)

Chair of the Governance Committee, member of the Compensation and Executive Committees.

Ms. Eicher brings a wealth of global manufacturing, operations and merger and acquisition experience from her senior leadership positions at Innocor, Inc., The Dow Chemical Company, Rohm and Haas Company, Ashland Chemical Company and E.I. DuPont de Nemours and Company, Inc. In these positions she has led expansion efforts in developing countries and can provide insights as to the issues we may face as we expand our presence in Brazil, China and other developing countries.

Maria C. Green ,, 66, Director Since 2019, , Senior Vice President and General Counsel of Ingersoll Rand plc

Member of the Executive and Governance Committees.

Ms. Green was selected by the Board because of her extensive experience in public company corporate governance, global legal and compliance and international matters. She also brings extensive public company experience in the areas of acquisitions, enterprise risk management, environmental health, safety and sustainability and shareholder activism. This experience will be particularly valuable as we focus on successful global business integrations, achievement of acquisition-related synergies and maximizing shareholder value.

H. Chris Killingstad,, 63, Director Since 2005 , , President and Chief Executive Officer of Tennant Company

Mr. Killingstad, our President and Chief Executive Officer, through his work with General Electric, PepsiCo Inc. and The Pillsbury Company, as well as with the Company, has led global expansion and turnaround efforts and has developed expertise in the areas of product innovation, brand marketing and building strong leadership teams.

Donal L. Mulligan ,, 58, Director Since 2009 , , Executive Vice President and Chief Financial Officer of General Mills, Inc.

Chair of the Audit Committee, member of the Executive and Governance Committees.

Mr. Mulligan was selected by the Board not only because of his financial expertise and his various senior financial and operations leadership positions at large multinational public companies, but also because of his knowledge in developing, marketing and branding innovative products, which is particularly relevant to our business.

Steven A. Sonnenberg,, 65, Director Since 2005, Lead Director Since 2016, , Senior Advisor of Emerson Automation Solutions

Lead Director, Chair of the Executive Committee, member of the Audit and Governance Committees.

Mr. Sonnenberg is an expert in global sales, operations and expansion. His leadership roles with Emerson Electric Company and its various divisions have helped him acquire a specific expertise in process improvement, grounded in systems and metrics that are critical to successful, scalable growth and expansion, which applies directly to our process improvement and growth initiatives. His experience with global acquisitions and joint ventures, and his expertise in emerging markets are also very valuable as we grow our global business.

David S. Wichmann ,, 56, Director Since 2009 , , Chief Executive Officer and member of the Board of Directors of UnitedHealth Group, Inc.

Member of the Audit, Compensation and Executive Committees.

Mr. Wichmann was selected by the Board for his global financial operations, merger and acquisitions and business integration expertise. In addition to being a seasoned senior executive with UnitedHealth Group, he has experience across multiple businesses through his early consulting practice with Arthur Andersen and as Chief Financial Officer of a company in our industry. His understanding of business processes, finance, accounting and internal controls adds further discipline to our growth initiatives.

David Windley,, 55, Director Since 2016 , , President of IQTalent Partners

Chair of the Compensation Committee, member of the Executive and Governance Committees.

Mr. Windley has extensive global human resources management, succession planning and executive compensation expertise from his executive roles with IQTalent Partners, Fusion-io, Inc., Yahoo! Inc. and Microsoft Corporation. His experience with leading technologies will be particularly valuable as we expand how we use digital technology in our products and in our go-to-market initiatives.

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