Zendesk, Inc. Board appointed Adrian McDermott as its Chief Technology Officer, effective April 5, 2021. From October 2016 until his appointment as Chief Technology Officer, Mr. McDermott served as the Company’s President of Products. Mr. McDermott has served on the board of directors of FireEye, Inc., a security software company, since January 2019. Mr. McDermott served as the Company’s Senior Vice President, Product Development from July 2010 until October 2016. Mr. McDermott holds a B.Sc. in computer science from De Montfort University. There are no arrangements or understandings between Mr. McDermott and any other persons pursuant to which he was appointed as Chief Technology Officer. There are also no family relationships between Mr. McDermott and the executive officers or directors of the Company, and no transactions involving the Company and Mr. McDermott that the Company would be required to report pursuant to Item 404(a) of Regulation S-K. the Company’s Board appointed Jeffrey Titterton as Chief Operating Officer of the Company, effective April 5, 2021. Mr. Titterton, age 48, has served as the Company’s Chief Marketing Officer since October 2018, until his appointment as Chief Operating Officer. Mr. Titterton served as the Company’s Senior Vice President, Marketing from May 2017 until October 2018. From January 2017 to May 2017, Mr. Titterton served as the Head of Global Campaign and Engagement Marketing for Adobe Inc., a software company, where he also was the Head of Engagement Marketing, Creative Cloud from August 2013 to January 2017. Prior to that, he served as the Chief Marketing Officer for 99designs, a graphic design marketplace, from August 2011 to August 2013. Mr. Titterton holds a B.A. in English and a concentration in economics from Cornell University. There are no arrangements or understandings between Mr. Titterton and any other persons pursuant to which he was appointed as Chief Operating Officer. There are also no family relationships between Mr. Titterton and the executive officers or directors of the Company, and no transactions involving the Company and Mr. Titterton that the Company would be required to report pursuant to Item 404(a) of Regulation S-K. The Board of Directors (the “Board”) of Zendesk, Inc. (the “Company”) appointed Brandon Gayle to the Board as a Class II director and Steve Johnson as a Class III director, effective that day. Mr. Gayle’s term will expire at the Company’s 2022 annual meeting of stockholders, and Mr. Johnson’s term will expire at the Company’s 2023 annual meeting of stockholders. Concurrent with each of their appointments to the Board, Mr. Gayle was appointed to the Audit Committee of the Board and Mr. Johnson was appointed to the Compensation Committee of the Board. There are no arrangements or understandings between either Mr. Gayle or Mr. Johnson and any other persons pursuant to which they were selected to serve as a director. Additionally, there are no transactions involving the Company and Mr. Gayle or Mr. Johnson that the Company would be required to report pursuant to Item 404(a) of Regulation S-K.