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 OF SECURITIES
                                                                                  
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
                      

1. Name and Address of Reporting Person *

BC Partners Holdings Ltd		 2. Issuer Name and Ticker or Trading Symbol

Cyxtera Technologies, Inc. [ CYXT ] 		5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

_____ Director                    __X__ 10% Owner
_____ Officer (give title below)    _____ Other (specify below)
(Last)          (First)          (Middle)

WEST WING, FLOOR 2, TRAFALGAR COURT,, LES BANQUES		 3. Date of Earliest Transaction (MM/DD/YYYY)

10/1/2022
(Street)

ST. PETER PORT, Y7 GY1 4LY
(City)        (State)        (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)

 
 6. Individual or Joint/Group Filing (Check Applicable Line)

___ Form filed by One Reporting Person
_ X _ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3) 		2. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. 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 10/1/2022  M  6000 A (1)68317440 I By BCEC-SIS Holdings, L.P. (2)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3)		2. Conversion or Exercise Price of Derivative Security3. Trans. Date3A. Deemed Execution Date, if any4. Trans. Code
(Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date7. Title and Amount of Securities Underlying Derivative Security
(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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Restricted Stock Unit  (1)10/1/2022  M     6000   (3) (3)Class A Common Stock 6000.0 $0 0 I By BCEC-SIS Holdings, L.P. (2)
Explanation of Responses:
(1) Each restricted stock unit ("RSU") represents a contingent right to receive one share of Class A common stock.
(2) The general partners of BCEC-SIS Holdings L.P. (the "BC Stockholder") are CIE Management IX Limited and BCEC Management X Limited, which are controlled by the board of directors, which are appointed by BC Partners Group Holdings Limited, which is a majority owned subsidiary of BC Partners Holdings Limited, which is controlled by Lee Clark, Karen Jamieson and Mark Rodliffe. As a result, each of the foregoing entities may be deemed to share voting and investment power over the shares held directly by the BC Stockholder, but disclaim beneficial ownership of the securities reported herein except to the extent of their pecuniary interest therein.
(3) The RSUs vest on October 1, 2022 and have no expiration date.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director10% OwnerOfficerOther
BC Partners Holdings Ltd
WEST WING, FLOOR 2, TRAFALGAR COURT,
LES BANQUES
ST. PETER PORT, Y7 GY1 4LY
X

BC Partners Group Holdings Ltd
WEST WING, FLOOR 2, TRAFALGAR COURT,
LES BANQUES
ST. PETER PORT, Y7 GY1 4LY
X

BCEC Management X Ltd
ARNOLD HOUSE PO BOX 273
ST JULIAN'S AVENUE
ST PETER PORT, Y7 GY1 3RD
X

CIE Management IX Ltd
ARNOLD HOUSE PO BOX 273
ST JULIAN'S AVENUE
ST PETER PORT, Y7 GY1 3RD
X

BCEC-SIS Holdings L.P.
ARNOLD HOUSE PO BOX 273 ST
JULIAN'S AVENUE
ST PETER PORT, Y7 GY1 3RD
X
Signatures
BC Partners Holdings Limited, By: /s/ Lee Clark, Name: Lee Clark, Title: Director10/4/2022
**Signature of Reporting PersonDate

BC Partners Group Holdings Limited, By: /s/ Lee Clark, Name: Lee Clark, Title: Director10/4/2022
**Signature of Reporting PersonDate

BCEC Management X Limited, By: /s/ Lee Clark, Name: Lee Clark, Title: Director10/4/2022
**Signature of Reporting PersonDate

CIE Management IX Limited, By: /s/ Lee Clark, Name: Lee Clark, Title: Director10/4/2022
**Signature of Reporting PersonDate

BCEC-SIS Holdings, L.P., By: /s/ Lee Clark, Name: Lee Clark, Title: Director of the General Partners10/4/2022
**Signature of Reporting PersonDate
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 control number.
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