X0306 4 2022-10-01 0 0001794905 Cyxtera Technologies, Inc. CYXT 0001362697 Smith Jeffrey C C/O STARBOARD VALUE LP 201 E LAS OLAS BOULEVARD, SUITE 1000 FORT LAUDERDALE FL 33301 1 0 1 0 Class A Common Stock 2022-10-01 4 M 0 3273 A 3273 D Class A Common Stock 20767571 I By Starboard Value LP Restricted Stock Unit 2022-10-01 4 M 0 3273 0.00 D Class A Common Stock 3273 20304 D Each restricted stock unit ("RSU") represents a contingent right to receive one share of Class A common stock. Starboard Value LP ("Starboard") serves as the investment manager or manager of certain managed accounts and private investment funds (collectively, the "Starboard Accounts"), which hold the securities reported herein and as such may be deemed to beneficially own such securities. The Reporting Person, as a Managing Member of Starboard, may be deemed to beneficially own the securities directly held by the Starboard Accounts for purposes of Section 16 of the Securities Exchange Act of 1934, as amended. The Reporting Person expressly disclaims beneficial ownership of such securities except to the extent of his pecuniary interest therein. The 3,273 RSUs vested on October 1, 2022 and had no expiration date. Other RSUs also have no expiration and vest one year after grant. The Reporting Person also owns a partial pecuniary interest in SVAC Sponsor LLC through his interest in the Starboard Accounts. /s/ Jeffrey C. Smith 2022-10-04