Statement of Changes in Beneficial Ownership (Form 4)

Ownership Submission

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. 20549STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person * Starboard Value 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 _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 777 THIRD AVENUE , 18TH FLOOR 3. Date of Earliest Transaction (Month/Day/Year) (Street) NEW YORK NY 10017 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Join/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 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code 4. Securities Acquired (A) or Disposed of (D) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) 6. Ownership Form: Direct (D) or Indirect (I) 7. Nature of Indirect Beneficial Ownership Code V Amount (A) or (D) Price

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivate Security	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code	5. Number of Derivative Securities Acquired (A) or Disposed of (D)	6. Date Exercisable and Expiration Date	7. Title and Amount of Securities Underlying Derivative Security	8. Price of Derivative Security	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s)	10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)	11. Nature of Indirect Beneficial Ownership
Code	V	(A)	(D)	Date Exercisable	Expriation Date	Title	Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address	Relationships
Director	10% Owner	Officer	Other
Starboard Value LP 777 THIRD AVENUE 18TH FLOOR NEW YORK, NY10017	X	X
Starboard Value GP LLC 777 THIRD AVENUE 18TH FLOOR NEW YORK, NY10017	X	X
Starboard Principal Co LP 777 THIRD AVENUE 18TH FLOOR NEW YORK, NY10017	X	X
Starboard Principal Co GP LLC 777 THIRD AVENUE 18TH FLOOR NEW YORK, NY10017	X	X
Starboard Value & Opportunity C LP 777 THIRD AVENUE 18TH FLOOR NEW YORK, NY10017	X	X
Starboard Value R LP 777 THIRD AVENUE 18TH FLOOR NEW YORK, NY10017	X	X
STARBOARD VALUE & OPPORTUNITY MASTER FUND LTD 777 THIRD AVENUE 18TH FLOOR NEW YORK, NY10017	X	X
STARBOARD VALUE & OPPORTUNITY S LLC 777 THIRD AVENUE 18TH FLOOR NEW YORK, NY10017	X	X
Starboard Value R GP LLC 777 THIRD AVENUE 18TH FLOOR NEW YORK, NY10017	X	X

Signatures

Starboard Value LP, By: /s/ Jeffrey C. Smith, Authorized Signatory	2022-01-19
**Signature of Reporting Person	Date
Starboard Value GP LLC, By: /s/ Jeffrey C. Smith, Authorized Signatory	2022-01-19
**Signature of Reporting Person	Date
Starboard Principal Co LP, By: /s/ Jeffrey C. Smith, Authorized Signatory	2022-01-19
**Signature of Reporting Person	Date
Starboard Principal Co GP LLC. By: /s/ Jeffrey C. Smith, Authorized Signatory	2022-01-19
**Signature of Reporting Person	Date
Starboard Value & Opportunity C LP, By:/s/ Jeffrey C. Smith, Authorized Signatory	2022-01-19
**Signature of Reporting Person	Date
Starboard Value R LP, By: /s/ Jeffrey C. Smith, Authorized Signatory	2022-01-19
**Signature of Reporting Person	Date
STARBOARD VALUE & OPPORTUNITY MASTER FUND LTD, By: /s/ Jeffrey C. Smith, Authorized Signatory	2022-01-19
**Signature of Reporting Person	Date
STARBOARD VALUE & OPPORTUNITY S LLC,By: /s/ Jeffrey C. Smith, Authorized Signatory	2022-01-19
**Signature of Reporting Person	Date
Starboard Value R GP LLC, By: /s/ Jeffrey C. Smith, Authorized Signatory	2022-01-19
**Signature of Reporting Person	Date

Explanation of Responses:

(*)	If the form is filed by more than one reporting person, see Instruction 5(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).
(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.

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