Sec Form 4 Filing - Starboard Value & Opportunity Master Fund L LP @ Cyxtera Technologies, Inc. - 2022-01-14

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL OMB Number: 3235-0287 Expires: November 30, 2011 Estimated average burden hours per response... 0.5

1. Name and Address of Reporting Person Starboard Value & Opportunity Master Fund L LP 2. Issuer Name and Ticker or Trading Symbol Cyxtera Technologies, Inc. [ CYXT] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director X __ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 777 THIRD AVENUE, 18TH FLOOR 3. Date of Earliest Transaction (MM/DD/YY) 01/14/2022 (Street) NEW YORK, NY10017 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) _____ Form filed by One Reporting Person __ X __ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Class A common stock( 1 )( 2 ) 01/14/2022 M 281,983( 9 ) A 9,510,087 I By Starboard Value and Opportunity Master Fund Ltd( 3 ) Class A common stock( 1 )( 2 ) 01/14/2022 M 48,634( 9 ) A 1,690,739 I By Starboard Value and Opportunity S LLC( 4 ) Class A common stock( 1 )( 2 ) 01/14/2022 M 83,022( 9 ) A 2,785,969 I By Managed Account of Starboard Value LP( 5 ) Class A common stock( 1 )( 2 ) 01/14/2022 M 28,984( 9 ) A 1,004,037 I By Starboard Value and Opportunity C LP( 6 ) Class A common stock( 1 )( 2 ) 01/14/2022 M 22,597( 9 ) A 788,808 I By Starboard Value and Opportunity Master Fund L LP( 7 ) Class A common stock( 1 )( 2 ) 01/14/2022 M 26,036( 9 ) A 1,237,931 I By S tarboard X Master Fund Ltd( 8 )

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Warrants( 1 )( 2 ) ( 10 ) 01/14/2022 M 1,064,090( 9 ) ( 10 ) ( 10 ) Class A common stock 1,064,090 ( 10 ) 0 I By Starboard Value and Opportunity Master Fund Ltd( 3 ) Warrants( 1 )( 2 ) ( 10 ) 01/14/2022 M 183,527( 9 ) ( 10 ) ( 10 ) Class A common stock 183,527 ( 10 ) 0 I By Starboard Value and Opportunity S LLC( 4 ) Warrants( 1 )( 2 ) ( 10 ) 01/14/2022 M 313,294( 9 ) ( 10 ) ( 10 ) Class A common stock 313,294 ( 10 ) 0 I By Managed Account of Starboard Value LP( 5 ) Warrants( 1 )( 2 ) ( 10 ) 01/14/2022 M 109,375( 9 ) ( 10 ) ( 10 ) Class A common stock 109,375 ( 10 ) 0 I By Starboard Value and Opportunity C LP( 6 ) Warrants( 1 )( 2 ) ( 10 ) 01/14/2022 M 85,275( 9 ) ( 10 ) ( 10 ) Class A common stock 85,275 ( 10 ) 0 I By Starboard Value and Opportunity Master Fund L LP( 7 ) Warrants( 1 )( 2 ) ( 10 ) 01/14/2022 M 98,252( 9 ) ( 10 ) ( 10 ) Class A common stock 98,252 ( 10 ) 0 I By Starboard X Master Fund Ltd( 8 ) Optional Shares( 1 )( 2 ) ( 11 ) ( 11 ) ( 11 ) Class A common stock 2,092,500 2,092,500 I By Starboard Value and Opportunity Master Fund Ltd( 3 ) Optional Shares( 1 )( 2 ) ( 11 ) ( 11 ) ( 11 ) Class A common stock 363,750 363,750 I By Starboard Value and Opportunity S LLC( 4 ) Optional Shares( 1 )( 2 ) ( 11 ) ( 11 ) ( 11 ) Class A common stock 513,750 513,750 I By Managed Account of Starboard Value LP( 5 ) Optional Shares( 1 )( 2 ) ( 11 ) ( 11 ) ( 11 ) Class A common stock 217,500 217,500 I By Starboard Value and Opportunity C LP( 6 ) Optional Shares( 1 )( 2 ) ( 11 ) ( 11 ) ( 11 ) Class A common stock 150,000 150,000 I By Starboard Value and Opportunity Master Fund L LP( 7 ) Optional Shares( 1 )( 2 ) ( 11 ) ( 11 ) ( 11 ) Class A common stock 412,500 412,500 I By Starboard X Master Fund Ltd( 8 )

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Starboard Value & Opportunity Master Fund L LP 777 THIRD AVENUE 18TH FLOOR NEW YORK, NY10017 X X Starboard Value L LP 777 THIRD AVENUE 18TH FLOOR NEW YORK, NY10017 X X Starboard X Master Fund Ltd 777 THIRD AVENUE 18TH FLOOR NEW YORK, NY10017 X X Feld Peter A 777 THIRD AVENUE 18TH FLOOR NEW YORK, NY10017 X X Signatures Starboard Value and Opportunity Master Fund L LP, By: /s/ Jeffrey C. Smith, Authorized Signatory 01/19/2022 Signature of Reporting Person Date Starboard Value L LP, By: /s/ Jeffrey C. Smith, Authorized Signatory 01/19/2022 Signature of Reporting Person Date Starboard X Master Fund Ltd, By: /s/ Jeffrey C. Smith, Authorized Signatory 01/19/2022 Signature of Reporting Person Date /s/ Peter A. Feld 01/19/2022 Signature of Reporting Person Date

Explanation of Responses:

( 1 )This Form 4 is filed jointly by Starboard Value and Opportunity Master Fund Ltd ("Starboard V&O Fund"), Starboard Value and Opportunity S LLC ("Starboard S LLC"), Starboard Value ("Starboard Value LP"), Starboard Value GP LLC ("Starboard Value GP"), Starboard Principal Co LP ("Principal Co"), Starboard Principal Co GP, LLC ("Principal GP"), Starboard Value and Opportunity C LP ("Starboard C LP"), Starboard Value R LP ("Starboard R LP"), Starboard Value R GP LLC ("Starboard R GP"), Starboard Value and Opportunity Master Fund L LP ("Starboard L Master"), Starboard Value L LP ("Starboard L LP"), Starboard X Master Fund Ltd ("Starboard X Master") and Peter A. Feld (collectively, the "Reporting Persons"). Jeffrey C. Smith reported the cashless exercises in a separate Form 4. ( 2 )To enable all of the Reporting Persons to gain access to the Securities and Exchange Commission's electronic filing system (which only accepts a maximum of 10 joint filers per report), this report is the first of two identical reports relating to the same transactions being filed with the Securities and Exchange Commission. Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding Ordinary Shares. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose. ( 3 )Securities beneficially owned by Starboard V&O Fund. Starboard Value LP, as the investment manager of Starboard V&O Fund, may be deemed to be the beneficial owner of the securities beneficially owned by Starboard V&O Fund. Each of Starboard Value GP, as the general partner of Starboard Value LP, Principal Co, as a member of Starboard Value GP, Principal GP, as the general partner of Principal Co, and Messrs. Smith and Feld, as members of Principal GP and as members of each of the Management Committee of Starboard Value GP and the Management Committee of Principal GP, may be deemed to be the beneficial owner of the securities beneficially owned by Starboard V&O Fund. ( 4 )Securities beneficially owned by Starboard S LLC. Starboard Value LP, as the manager of Starboard S LLC, may be deemed to be the beneficial owner of the securities beneficially owned by Starboard S LLC. Each of Starboard Value GP, as the general partner of Starboard Value LP, Principal Co, as a member of Starboard Value GP, Principal GP, as the general partner of Principal Co, and Messrs. Smith and Feld, as members of Principal GP and as members of each of the Management Committee of Starboard Value GP and the Management Committee of Principal GP, may be deemed to be the beneficial owner of the securities beneficially owned by Starboard S LLC. ( 5 )Securities held in a certain account managed by Starboard Value LP (the "Starboard Value LP Account"). Each of Starboard Value GP, as the general partner of Starboard Value LP, Principal Co, as a member of Starboard Value GP, Principal GP, as the general partner of Principal Co, and Messrs. Smith and Feld, as members of Principal GP and as members of each of the Management Committee of Starboard Value GP and the Management Committee of Principal GP, may be deemed to be the beneficial owner of the securities beneficially owned by Starboard Value LP and held by the Starboard Value LP Account. ( 6 )Securities beneficially owned by Starboard C LP. Each of Starboard R LP, as the general partner of Starboard C LP, and Starboard R GP, as the general partner of Starboard R LP, may be deemed to be the beneficial owner of the securities beneficially owned by Starboard C LP. Starboard Value LP, as the investment manager of Starboard C LP, may be deemed to be the beneficial owner of the securities beneficially owned by Starboard C LP. Each of Starboard Value GP, as the general partner of Starboard Value LP, Principal Co, as a member of Starboard Value GP, Principal GP, as the general partner of Principal Co, and Messrs. Smith and Feld, as members of Principal GP and as members of each of the Management Committee of Starboard Value GP and the Management Committee of Principal GP, may be deemed to be the beneficial owner of the securities beneficially owned by Starboard C LP. ( 7 )Securities beneficially owned by Starboard L Master. Each of Starboard L LP, as the general partner of Starboard L Master, and Starboard R GP, as the general partner of Starboard L LP, may be deemed to be the beneficial owner of the securities beneficially owned by Starboard L LP. Starboard Value LP, as the investment manager of Starboard L Master, may be deemed to be the beneficial owner of the securities beneficially owned by Starboard L Master. Each of Starboard Value GP, as the general partner of Starboard Value LP, Principal Co, as a member of Starboard Value GP, Principal GP, as the general partner of Principal Co, and Messrs. Smith and Feld, as members of Principal GP and as members of each of the Management Committee of Starboard Value GP and the Management Committee of Principal GP, may be deemed to be the beneficial owner of the securities beneficially owned by Starboard L Master. ( 8 )Securities beneficially owned by Starboard X Master. Starboard Value LP, as the investment manager of Starboard X Master, may be deemed to be the beneficial owner of the securities beneficially owned by Starboard X Master. Each of Starboard Value GP, as the general partner of Starboard Value LP, Principal Co, as a member of Starboard Value GP, Principal GP, as the general partner of Principal Co, and Messrs. Smith and Feld, as members of Principal GP and as members of each of the Management Committee of Starboard Value GP and the Management Committee of Principal GP, may be deemed to be the beneficial owner of the securities beneficially owned by Starboard X Master. ( 9 )In connection with the Cyxtera Technologies, Inc. (the "Issuer") determination to redeem its outstanding warrants, the warrants permit the holder to cashlessly exercise the warrants at the stated rate of 0.265 shares of Class A Common Stock per warrant. ( 10 )The warrants became exercisable 12 months from the closing of Starboard Value Acquisition Corp.'s ("SVAC") initial public offering, which closed on September 14, 2020. The warrants would have expired five years after the completion of the business combination between SVAC, Mundo Merger Sub 1, Inc., Mundo Merger Sub 2, LLC, the Issuer and Mundo Holdings, Inc. or earlier upon redemption or liquidation. Each whole warrant would have entitled the holder thereof to purchase one share of Class A common stock at a price of $11.50 per share (subject to adjustment). ( 11 )The option to purchase shares of Class A common stock at a price per share of $10.00 is exercisable by the Starboard Accounts at any time or from time to time during the six month following the day that is the first business day after the consummation of the business combination between SVAC and Cyxtera Technologies, Inc., which was consummated on July 29, 2021.

Remarks: Starboard V&O Fund, Starboard S LLC, the Starboard Value LP Account, Starboard C LP, Starboard L Master and Starboard X Master also own a partial pecuniary interest in SVAC Sponsor LLC. Jeffrey C. Smith is a Managing Member, Chief Executive Officer and Chief Investment Officer of Starboard Value LP and is a director of the Issuer. By virtue of his service on the Board of Directors of the Issuer as a representative of Starboard Value LP, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, each reporting person may be deemed to be a director by deputization of the Issuer.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.