UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

 

 

SCHEDULE 13D

Amendment No. 2

Under the Securities Exchange Act of 1934

 

 

ATI PHYSICAL THERAPY, INC.

(Name of Issuer)

Class A Common Stock, $0.0001 par value per share

(Title of Class of Securities)

00216W109

(CUSIP Number)

Copy to:

James Westra

General Counsel and Managing Partner

Advent International Corporation

Prudential Tower

800 Boylston Street

Boston, MA 02199-8069

December 13, 2021

(Date of Event Which Requires Filing of this Statement)

 

 

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because § 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g) check the following box  ☐.

 

 

Note: Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See § 240.13d-7(b) for other parties to whom copies are to be sent.

 

 

 

*    The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

 

 

 


CUSIP No. 00216W109    13D

 

  1    

  NAMES OF REPORTING PERSONS

 

  ADVENT INTERNATIONAL CORPORATION

  2  

  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

  (a)  ☐        (b)  ☒

 

  3  

  SEC USE ONLY

 

  4  

  SOURCE OF FUNDS

 

  N/A

  5  

  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e):

 

  ☐

  6  

  CITIZENSHIP OR PLACE OF ORGANIZATION

 

  DELAWARE

NUMBER OF

SHARES

BENEFICIALLY

OWNED BY

EACH

REPORTING

PERSON

WITH:

 

     7     

  SOLE VOTING POWER

 

  0

     8   

  SHARED VOTING POWER

 

  116,391,635

     9   

  SOLE DISPOSITIVE POWER

 

  0

   10   

  SHARED DISPOSITIVE POWER

 

  116,391,635

11    

  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

 

  116,391,635

12  

CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES

 

  ☐

13  

  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

 

  56.2%*

14  

  TYPE OF REPORTING PERSON

 

  CO

 

*

Calculation based on 207,282,536 shares of Class A Common Stock of the Issuer outstanding as of November 11, 2021, as reported by the Issuer in its Quarterly Report on Form 10-Q, as filed with the Securities and Exchange Commission on November 17, 2021.


CUSIP No. 00216W109    13D

 

  1    

  NAMES OF REPORTING PERSONS

 

  ADVENT INTERNATIONAL GPE VII, LLC

  2  

  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

  (a)  ☐        (b)  ☒

 

  3  

  SEC USE ONLY

 

  4  

  SOURCE OF FUNDS

 

  N/A

  5  

  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e):

 

  ☐

  6  

  CITIZENSHIP OR PLACE OF ORGANIZATION

 

  DELAWARE

NUMBER OF

SHARES

BENEFICIALLY

OWNED BY

EACH

REPORTING

PERSON

WITH:

 

     7     

  SOLE VOTING POWER

 

  0

     8   

  SHARED VOTING POWER

 

  115,830,656

     9   

  SOLE DISPOSITIVE POWER

 

  0

   10   

  SHARED DISPOSITIVE POWER

 

  115,830,656

11    

  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

 

  115,830,656

12  

CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES

 

  ☐

13  

  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

 

  55.9%*

14  

  TYPE OF REPORTING PERSON

 

  OO

 

*

Calculation based on 207,282,536 shares of Class A Common Stock of the Issuer outstanding as of November 11, 2021, as reported by the Issuer in its Quarterly Report on Form 10-Q, as filed with the Securities and Exchange Commission on November 17, 2021.


CUSIP No. 00216W109    13D

 

  1    

  NAMES OF REPORTING PERSONS

 

  WILCO ACQUISITION, LP

  2  

  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

  (a)  ☐        (b)  ☒

 

  3  

  SEC USE ONLY

 

  4  

  SOURCE OF FUNDS

 

  OO

  5  

  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e):

 

  ☐

  6  

  CITIZENSHIP OR PLACE OF ORGANIZATION

 

  DELAWARE

NUMBER OF

SHARES

BENEFICIALLY

OWNED BY

EACH

REPORTING

PERSON

WITH:

 

     7     

  SOLE VOTING POWER

 

  0

     8   

  SHARED VOTING POWER

 

  560,979

     9   

  SOLE DISPOSITIVE POWER

 

  0

   10   

  SHARED DISPOSITIVE POWER

 

  560,979

11    

  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

 

  560,979

12  

CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES

 

  ☐

13  

  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

 

  0.3%

14  

  TYPE OF REPORTING PERSON

 

  PN

 

*

Calculation based on 207,282,536 shares of Class A Common Stock of the Issuer outstanding as of November 11, 2021, as reported by the Issuer in its Quarterly Report on Form 10-Q, as filed with the Securities and Exchange Commission on November 17, 2021.


CUSIP No. 00216W109    13D

 

  1    

  NAMES OF REPORTING PERSONS

 

  WILCO GP, INC.

  2  

  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

  (a)  ☐        (b)  ☒

 

  3  

  SEC USE ONLY

 

  4  

  SOURCE OF FUNDS

 

  N/A

  5  

  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e):

 

  ☐

  6  

  CITIZENSHIP OR PLACE OF ORGANIZATION

 

  DELAWARE

NUMBER OF

SHARES

BENEFICIALLY

OWNED BY

EACH

REPORTING

PERSON

WITH:

 

     7     

  SOLE VOTING POWER

 

  0

     8   

  SHARED VOTING POWER

 

  560,979

     9   

  SOLE DISPOSITIVE POWER

 

  0

   10   

  SHARED DISPOSITIVE POWER

 

  560,979

11    

  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

 

  560,979

12  

CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES

 

  ☐

13  

  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

 

  0.3%

14  

  TYPE OF REPORTING PERSON

 

  CO

 

*

Calculation based on 207,282,536 shares of Class A Common Stock of the Issuer outstanding as of November 11, 2021, as reported by the Issuer in its Quarterly Report on Form 10-Q, as filed with the Securities and Exchange Commission on November 17, 2021.


CUSIP No. 00216W109    13D

 

  1    

  NAMES OF REPORTING PERSONS

 

  ADVENT INTERNATIONAL GPE VII LIMITED PARTNERSHIP

  2  

  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

  (a)  ☐        (b)  ☒

 

  3  

  SEC USE ONLY

 

  4  

  SOURCE OF FUNDS

 

  N/A

  5  

  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)

 

  ☐

  6  

  CITIZENSHIP OR PLACE OF ORGANIZATION

 

  LUXEMBOURG

NUMBER OF

SHARES

BENEFICIALLY

OWNED BY

EACH

REPORTING

PERSON

WITH:

 

     7     

  SOLE VOTING POWER

 

  0

     8   

  SHARED VOTING POWER

 

  11,324,692

     9   

  SOLE DISPOSITIVE POWER

 

  0

   10   

  SHARED DISPOSITIVE POWER

 

  11,324,692

11    

  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

 

  11,324,692

12  

CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES

 

  ☐

13  

  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

 

  5.5%*

14  

  TYPE OF REPORTING PERSON

 

  PN

 

*

Calculation based on 207,282,536 shares of Class A Common Stock of the Issuer outstanding as of November 11, 2021, as reported by the Issuer in its Quarterly Report on Form 10-Q, as filed with the Securities and Exchange Commission on November 17, 2021.


CUSIP No. 00216W109    13D

 

  1    

  NAMES OF REPORTING PERSONS

 

  ADVENT INTERNATIONAL GPE VII-B LIMITED PARTNERSHIP

  2  

  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

  (a)  ☐        (b)  ☒

 

  3  

  SEC USE ONLY

 

  4  

  SOURCE OF FUNDS

 

  N/A

  5  

  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e):

 

  ☐

  6  

  CITIZENSHIP OR PLACE OF ORGANIZATION

 

  LUXEMBOURG

NUMBER OF

SHARES

BENEFICIALLY

OWNED BY

EACH

REPORTING

PERSON

WITH:

 

     7     

  SOLE VOTING POWER

 

  0

     8   

  SHARED VOTING POWER

 

  30,970,374

     9   

  SOLE DISPOSITIVE POWER

 

  0

   10   

  SHARED DISPOSITIVE POWER

 

  30,970,374

11    

  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

 

  30,970,374

12  

CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES

 

  ☐

13  

  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

 

  14.9%*

14  

  TYPE OF REPORTING PERSON

 

  PN

 

*

Calculation based on 207,282,536 shares of Class A Common Stock of the Issuer outstanding as of November 11, 2021, as reported by the Issuer in its Quarterly Report on Form 10-Q, as filed with the Securities and Exchange Commission on November 17, 2021.


CUSIP No. 00216W109    13D

 

  1    

  NAMES OF REPORTING PERSONS

 

  ADVENT INTERNATIONAL GPE VII-C LIMITED PARTNERSHIP

  2  

  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

  (a)  ☐        (b)  ☒

 

  3  

  SEC USE ONLY

 

  4  

  SOURCE OF FUNDS

 

  N/A

  5  

  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e):

 

  ☐

  6  

  CITIZENSHIP OR PLACE OF ORGANIZATION

 

  LUXEMBOURG

NUMBER OF

SHARES

BENEFICIALLY

OWNED BY

EACH

REPORTING

PERSON

WITH:

 

     7     

  SOLE VOTING POWER

 

  0

     8   

  SHARED VOTING POWER

 

  9,845,475

     9   

  SOLE DISPOSITIVE POWER

 

  0

   10   

  SHARED DISPOSITIVE POWER

 

  9,845,475

11    

  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

 

  9,845,475

12  

CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES

 

  ☐

13  

  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

 

  4.7%*

14  

  TYPE OF REPORTING PERSON

 

  PN

 

*

Calculation based on 207,282,536 shares of Class A Common Stock of the Issuer outstanding as of November 11, 2021, as reported by the Issuer in its Quarterly Report on Form 10-Q, as filed with the Securities and Exchange Commission on November 17, 2021.


CUSIP No. 00216W109    13D

 

  1    

  NAMES OF REPORTING PERSONS

 

ADVENT INTERNATIONAL GPE VII-D LIMITED PARTNERSHIP

  2  

  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

  (a)  ☐        (b)  ☒

 

  3  

  SEC USE ONLY

 

  4  

  SOURCE OF FUNDS

 

  N/A

  5  

  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e):

 

  ☐

  6  

  CITIZENSHIP OR PLACE OF ORGANIZATION

 

  LUXEMBOURG

NUMBER OF

SHARES

BENEFICIALLY

OWNED BY

EACH

REPORTING

PERSON

WITH:

 

     7     

  SOLE VOTING POWER

 

  0

     8   

  SHARED VOTING POWER

 

  6,777,137

     9   

  SOLE DISPOSITIVE POWER

 

  0

   10   

  SHARED DISPOSITIVE POWER

 

  6,777,137

11    

  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

 

  6,777,137

12  

CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES

 

  ☐

13  

  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

 

  3.3%*

14  

  TYPE OF REPORTING PERSON

 

  PN

 

*

Calculation based on 207,282,536 shares of Class A Common Stock of the Issuer outstanding as of November 11, 2021, as reported by the Issuer in its Quarterly Report on Form 10-Q, as filed with the Securities and Exchange Commission on November 17, 2021.


CUSIP No. 00216W109    13D

 

  1    

  NAMES OF REPORTING PERSONS

 

ADVENT INTERNATIONAL GPE VII-F LIMITED PARTNERSHIP

  2  

  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

  (a)  ☐        (b)  ☒

 

  3  

  SEC USE ONLY

 

  4  

  SOURCE OF FUNDS

 

  N/A

  5  

  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e):

 

  ☐

  6  

  CITIZENSHIP OR PLACE OF ORGANIZATION

 

  LUXEMBOURG

NUMBER OF

SHARES

BENEFICIALLY

OWNED BY

EACH

REPORTING

PERSON

WITH:

 

     7     

  SOLE VOTING POWER

 

  0

     8   

  SHARED VOTING POWER

 

  2,873,509

     9   

  SOLE DISPOSITIVE POWER

 

  0

   10   

  SHARED DISPOSITIVE POWER

 

  2,873,509

11    

  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

 

  2,873,509

12  

CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES

 

  ☐

13  

  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

  1.4%*

14  

  TYPE OF REPORTING PERSON

 

  PN

 

*

Calculation based on 207,282,536 shares of Class A Common Stock of the Issuer outstanding as of November 11, 2021, as reported by the Issuer in its Quarterly Report on Form 10-Q, as filed with the Securities and Exchange Commission on November 17, 2021.


CUSIP No. 00216W109    13D

 

  1    

  NAMES OF REPORTING PERSONS

 

ADVENT INTERNATIONAL GPE VII-G LIMITED PARTNERSHIP

  2  

  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

  (a)  ☐        (b)  ☒

 

  3  

  SEC USE ONLY

 

  4  

  SOURCE OF FUNDS

 

  N/A

  5  

  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e):

 

  ☐

  6  

  CITIZENSHIP OR PLACE OF ORGANIZATION

 

  LUXEMBOURG

NUMBER OF

SHARES

BENEFICIALLY

OWNED BY

EACH

REPORTING

PERSON

WITH:

 

     7     

  SOLE VOTING POWER

 

  0

     8   

  SHARED VOTING POWER

 

  2,873,509

     9   

  SOLE DISPOSITIVE POWER

 

  0

   10   

  SHARED DISPOSITIVE POWER

 

  2,873,509

11    

  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

 

  2,873,509

12  

CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES

 

  ☐

13  

  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

  1.4%*

14  

  TYPE OF REPORTING PERSON

 

  PN

 

*

Calculation based on 207,282,536 shares of Class A Common Stock of the Issuer outstanding as of November 11, 2021, as reported by the Issuer in its Quarterly Report on Form 10-Q, as filed with the Securities and Exchange Commission on November 17, 2021.


CUSIP No. 00216W109    13D

 

  1    

  NAMES OF REPORTING PERSONS

 

GPE VII GP S.A.R.L.

  2  

  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

  (a)  ☐        (b)  ☒

 

  3  

  SEC USE ONLY

 

  4  

  SOURCE OF FUNDS

 

  N/A

  5  

  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e):

 

  ☐

  6  

  CITIZENSHIP OR PLACE OF ORGANIZATION

 

  LUXEMBOURG

NUMBER OF

SHARES

BENEFICIALLY

OWNED BY

EACH

REPORTING

PERSON

WITH:

 

     7     

  SOLE VOTING POWER

 

  0

     8   

  SHARED VOTING POWER

 

  64,664,696

     9   

  SOLE DISPOSITIVE POWER

 

  0

   10   

  SHARED DISPOSITIVE POWER

 

  64,664,696

11    

  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

 

  64,664,696

12  

CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES

 

  ☐

13  

  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

  31.2%*

14  

  TYPE OF REPORTING PERSON

 

  CO

 

*

Calculation based on 207,282,536 shares of Class A Common Stock of the Issuer outstanding as of November 11, 2021, as reported by the Issuer in its Quarterly Report on Form 10-Q, as filed with the Securities and Exchange Commission on November 17, 2021.


CUSIP No. 00216W109    13D

 

  1    

  NAMES OF REPORTING PERSONS

 

  ADVENT INTERNATIONAL GPE VII-A LIMITED PARTNERSHIP

  2  

  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

  (a)  ☐        (b)  ☒

 

  3  

  SEC USE ONLY

 

  4  

  SOURCE OF FUNDS

 

  N/A

  5  

  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e):

 

  ☐

  6  

  CITIZENSHIP OR PLACE OF ORGANIZATION

 

  CAYMAN ISLANDS

NUMBER OF

SHARES

BENEFICIALLY

OWNED BY

EACH

REPORTING

PERSON

WITH:

 

     7     

  SOLE VOTING POWER

 

  0

     8   

  SHARED VOTING POWER

 

  10,481,755

     9   

  SOLE DISPOSITIVE POWER

 

  0

   10   

  SHARED DISPOSITIVE POWER

 

  10,481,755

11    

  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

 

  10,481,755

12  

CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES

 

  ☐

13  

  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

 

  5.1%*

14  

  TYPE OF REPORTING PERSON

 

  PN

 

*

Calculation based on 207,282,536 shares of Class A Common Stock of the Issuer outstanding as of November 11, 2021, as reported by the Issuer in its Quarterly Report on Form 10-Q, as filed with the Securities and Exchange Commission on November 17, 2021.


CUSIP No. 00216W109    13D

 

  1    

  NAMES OF REPORTING PERSONS

 

  ADVENT INTERNATIONAL GPE VII-E LIMITED PARTNERSHIP

  2  

  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

  (a)  ☐        (b)  ☒

 

  3  

  SEC USE ONLY

 

  4  

  SOURCE OF FUNDS

 

  N/A

  5  

  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e):

 

  ☐

  6  

  CITIZENSHIP OR PLACE OF ORGANIZATION

 

  CAYMAN ISLANDS

NUMBER OF

SHARES

BENEFICIALLY

OWNED BY

EACH

REPORTING

PERSON

WITH:

 

     7     

  SOLE VOTING POWER

 

  0

     8   

  SHARED VOTING POWER

 

  22,316,206

     9   

  SOLE DISPOSITIVE POWER

 

  0

   10   

  SHARED DISPOSITIVE POWER

 

  22,316,206

11    

  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

 

  22,316,206

12  

CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES

 

  ☐

13  

  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

 

  10.8%*

14  

  TYPE OF REPORTING PERSON

 

  PN

 

*

Calculation based on 207,282,536 shares of Class A Common Stock of the Issuer outstanding as of November 11, 2021, as reported by the Issuer in its Quarterly Report on Form 10-Q, as filed with the Securities and Exchange Commission on November 17, 2021.


CUSIP No. 00216W109    13D

 

  1    

  NAMES OF REPORTING PERSONS

 

  ADVENT INTERNATIONAL GPE VII-H LIMITED PARTNERSHIP

  2  

  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

  (a)  ☐        (b)  ☒

 

  3  

  SEC USE ONLY

 

  4  

  SOURCE OF FUNDS

 

  N/A

  5  

  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e):

 

  ☐

  6  

  CITIZENSHIP OR PLACE OF ORGANIZATION

 

  CAYMAN ISLANDS

NUMBER OF

SHARES

BENEFICIALLY

OWNED BY

EACH

REPORTING

PERSON

WITH:

 

     7     

  SOLE VOTING POWER

 

  0

     8   

  SHARED VOTING POWER

 

  1,743,884

     9   

  SOLE DISPOSITIVE POWER

 

  0

   10   

  SHARED DISPOSITIVE POWER

 

  1,743,884

11    

  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

 

  1,743,884

12  

CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES

 

  ☐

13  

  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

 

  0.8%*

14  

  TYPE OF REPORTING PERSON

 

  PN

 

*

Calculation based on 207,282,536 shares of Class A Common Stock of the Issuer outstanding as of November 11, 2021, as reported by the Issuer in its Quarterly Report on Form 10-Q, as filed with the Securities and Exchange Commission on November 17, 2021.


CUSIP No. 00216W109    13D

 

  1    

  NAMES OF REPORTING PERSONS

 

  GPE VII GP LIMITED PARTNERSHIP

  2  

  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

  (a)  ☐        (b)  ☒

 

  3  

  SEC USE ONLY

 

  4  

  SOURCE OF FUNDS

 

  N/A

  5  

  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e):

 

  ☐

  6  

  CITIZENSHIP OR PLACE OF ORGANIZATION

 

  CAYMAN ISLANDS

NUMBER OF

SHARES

BENEFICIALLY

OWNED BY

EACH

REPORTING

PERSON

WITH:

 

     7     

  SOLE VOTING POWER

 

  0

     8   

  SHARED VOTING POWER

 

  34,541,845

     9   

  SOLE DISPOSITIVE POWER

 

  0

   10   

  SHARED DISPOSITIVE POWER

 

  34,541,845

11    

  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

 

  34,541,845

12  

CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES

 

  ☐

13  

  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

 

  16.7%*

14  

  TYPE OF REPORTING PERSON

 

  PN

 

*

Calculation based on 207,282,536 shares of Class A Common Stock of the Issuer outstanding as of November 11, 2021, as reported by the Issuer in its Quarterly Report on Form 10-Q, as filed with the Securities and Exchange Commission on November 17, 2021.


CUSIP No. 00216W109    13D

 

  1    

  NAMES OF REPORTING PERSONS

 

  ADVENT PARTNERS GPE VII 2014 LIMITED PARTNERSHIP

  2  

  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

  (a)  ☐        (b)  ☒

 

  3  

  SEC USE ONLY

 

  4  

  SOURCE OF FUNDS

 

  N/A

  5  

  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e):

 

  ☐

  6  

  CITIZENSHIP OR PLACE OF ORGANIZATION

 

  DELAWARE

NUMBER OF

SHARES

BENEFICIALLY

OWNED BY

EACH

REPORTING

PERSON

WITH:

 

     7     

  SOLE VOTING POWER

 

  0

     8   

  SHARED VOTING POWER

 

  65,045

     9   

  SOLE DISPOSITIVE POWER

 

  0

   10   

  SHARED DISPOSITIVE POWER

 

  65,045

11    

  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

 

  65,045

12  

CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES

 

  ☐

13  

  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

 

  Less than 0.1%*

14  

  TYPE OF REPORTING PERSON

 

  PN

 

*

Calculation based on 207,282,536 shares of Class A Common Stock of the Issuer outstanding as of November 11, 2021, as reported by the Issuer in its Quarterly Report on Form 10-Q, as filed with the Securities and Exchange Commission on November 17, 2021.


CUSIP No. 00216W109    13D

 

  1    

  NAMES OF REPORTING PERSONS

 

  ADVENT PARTNERS GPE VII 2014 CAYMAN LIMITED PARTNERSHIP

  2  

  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

  (a)  ☐        (b)  ☒

 

  3  

  SEC USE ONLY

 

  4  

  SOURCE OF FUNDS

 

  N/A

  5  

  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e):

 

  ☐

  6  

  CITIZENSHIP OR PLACE OF ORGANIZATION

 

  CAYMAN ISLANDS

NUMBER OF

SHARES

BENEFICIALLY

OWNED BY

EACH

REPORTING

PERSON

WITH:

 

     7     

  SOLE VOTING POWER

 

  0

     8   

  SHARED VOTING POWER

 

  155,782

     9   

  SOLE DISPOSITIVE POWER

 

  0

   10   

  SHARED DISPOSITIVE POWER

 

  155,782

11    

  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

 

  155,782

12  

CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES

 

  ☐

13  

  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

 

  0.1%*

14  

  TYPE OF REPORTING PERSON

 

  PN

 

*

Calculation based on 207,282,536 shares of Class A Common Stock of the Issuer outstanding as of November 11, 2021, as reported by the Issuer in its Quarterly Report on Form 10-Q, as filed with the Securities and Exchange Commission on November 17, 2021.


CUSIP No. 00216W109    13D

 

  1    

  NAMES OF REPORTING PERSONS

 

  ADVENT PARTNERS GPE VII—A 2014 LIMITED PARTNERSHIP

  2  

  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

  (a)  ☐        (b)  ☒

 

  3  

  SEC USE ONLY

 

  4  

  SOURCE OF FUNDS

 

  N/A

  5  

  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e):

 

  ☐

  6  

  CITIZENSHIP OR PLACE OF ORGANIZATION

 

  DELAWARE

NUMBER OF

SHARES

BENEFICIALLY

OWNED BY

EACH

REPORTING

PERSON

WITH:

 

     7     

  SOLE VOTING POWER

 

  0

     8   

  SHARED VOTING POWER

 

  179,333

     9   

  SOLE DISPOSITIVE POWER

 

  0

   10   

  SHARED DISPOSITIVE POWER

 

  179,333

11    

  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

 

  179,333

12  

CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES

 

  ☐

13  

  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

 

  0.1%*

14  

  TYPE OF REPORTING PERSON

 

  PN

 

*

Calculation based on 207,282,536 shares of Class A Common Stock of the Issuer outstanding as of November 11, 2021, as reported by the Issuer in its Quarterly Report on Form 10-Q, as filed with the Securities and Exchange Commission on November 17, 2021.


CUSIP No. 00216W109    13D

 

  1    

  NAMES OF REPORTING PERSONS

 

  ADVENT PARTNERS GPE VII – A 2014 CAYMAN LIMITED PARTNERSHIP

  2  

  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

  (a)  ☐        (b)  ☒

 

  3  

  SEC USE ONLY

 

  4  

  SOURCE OF FUNDS

 

  N/A

  5  

  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e):

 

  ☐

  6  

  CITIZENSHIP OR PLACE OF ORGANIZATION

 

  CAYMAN ISLANDS

NUMBER OF

SHARES

BENEFICIALLY

OWNED BY

EACH

REPORTING

PERSON

WITH:

 

     7     

  SOLE VOTING POWER

 

  0

     8   

  SHARED VOTING POWER

 

  109,904

     9   

  SOLE DISPOSITIVE POWER

 

  0

   10   

  SHARED DISPOSITIVE POWER

 

  109,904

11    

  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

 

  109,904

12  

CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES

 

  ☐

13  

  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

 

  0.1%*

14  

  TYPE OF REPORTING PERSON

 

  PN

 

*

Calculation based on 207,282,536 shares of Class A Common Stock of the Issuer outstanding as of November 11, 2021, as reported by the Issuer in its Quarterly Report on Form 10-Q, as filed with the Securities and Exchange Commission on November 17, 2021.


CUSIP No. 00216W109    13D

 

  1    

  NAMES OF REPORTING PERSONS

 

  ADVENT PARTNERS GPE VII CAYMAN LIMITED PARTNERSHIP

  2  

  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

  (a)  ☐        (b)  ☒

 

  3  

  SEC USE ONLY

 

  4  

  SOURCE OF FUNDS

 

  N/A

  5  

  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e):

 

  ☐

  6  

  CITIZENSHIP OR PLACE OF ORGANIZATION

 

  CAYMAN ISLANDS

NUMBER OF

SHARES

BENEFICIALLY

OWNED BY

EACH

REPORTING

PERSON

WITH:

 

     7     

  SOLE VOTING POWER

 

  0

     8   

  SHARED VOTING POWER

 

  806,132

     9   

  SOLE DISPOSITIVE POWER

 

  0

   10   

  SHARED DISPOSITIVE POWER

 

  806,132

11    

  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

 

  806,132

12  

CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES

 

  ☐

13  

  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

 

  0.4%*

14  

  TYPE OF REPORTING PERSON

 

  PN

 

*

Calculation based on 207,282,536 shares of Class A Common Stock of the Issuer outstanding as of November 11, 2021, as reported by the Issuer in its Quarterly Report on Form 10-Q, as filed with the Securities and Exchange Commission on November 17, 2021.


CUSIP No. 00216W109    13D

 

  1    

  NAMES OF REPORTING PERSONS

 

  ADVENT PARTNERS GPE VII—B CAYMAN LIMITED PARTNERSHIP

  2  

  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

  (a)  ☐        (b)  ☒

 

  3  

  SEC USE ONLY

 

  4  

  SOURCE OF FUNDS

 

  N/A

  5  

  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e):

 

  ☐

  6  

  CITIZENSHIP OR PLACE OF ORGANIZATION

 

  CAYMAN ISLANDS

NUMBER OF

SHARES

BENEFICIALLY

OWNED BY

EACH

REPORTING

PERSON

WITH:

 

     7     

  SOLE VOTING POWER

 

  0

     8   

  SHARED VOTING POWER

 

  1,063,662

     9   

  SOLE DISPOSITIVE POWER

 

  0

   10   

  SHARED DISPOSITIVE POWER

 

  1,063,662

11    

  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

 

  1,063,662

12  

CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES

 

  ☐

13  

  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

 

  0.5%*

14  

  TYPE OF REPORTING PERSON

 

  PN

 

*

Calculation based on 207,282,536 shares of Class A Common Stock of the Issuer outstanding as of November 11, 2021, as reported by the Issuer in its Quarterly Report on Form 10-Q, as filed with the Securities and Exchange Commission on November 17, 2021.


CUSIP No. 00216W109    13D

 

  1    

  NAMES OF REPORTING PERSONS

 

  ADVENT PARTNERS GPE VII LIMITED PARTNERSHIP

  2  

  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

  (a)  ☐        (b)  ☒

 

  3  

  SEC USE ONLY

 

  4  

  SOURCE OF FUNDS

 

  N/A

  5  

  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e):

 

  ☐

  6  

  CITIZENSHIP OR PLACE OF ORGANIZATION

 

  DELAWARE

NUMBER OF

SHARES

BENEFICIALLY

OWNED BY

EACH

REPORTING

PERSON

WITH:

 

     7     

  SOLE VOTING POWER

 

  0

     8   

  SHARED VOTING POWER

 

  45,267

     9   

  SOLE DISPOSITIVE POWER

 

  0

   10   

  SHARED DISPOSITIVE POWER

 

  45,267

11    

  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

 

  45,267

12  

CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES

 

  ☐

13  

  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

 

  Less than 0.1%*

14  

  TYPE OF REPORTING PERSON

 

  PN

 

*

Calculation based on 207,282,536 shares of Class A Common Stock of the Issuer outstanding as of November 11, 2021, as reported by the Issuer in its Quarterly Report on Form 10-Q, as filed with the Securities and Exchange Commission on November 17, 2021.


CUSIP No. 00216W109    13D

 

  1    

  NAMES OF REPORTING PERSONS

 

  ADVENT PARTNERS GPE VII—A CAYMAN LIMITED PARTNERSHIP

  2  

  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

  (a)  ☐        (b)  ☒

 

  3  

  SEC USE ONLY

 

  4  

  SOURCE OF FUNDS

 

  N/A

  5  

  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e):

 

  ☐

  6  

  CITIZENSHIP OR PLACE OF ORGANIZATION

 

  CAYMAN ISLANDS

NUMBER OF

SHARES

BENEFICIALLY

OWNED BY

EACH

REPORTING

PERSON

WITH:

 

     7     

  SOLE VOTING POWER

 

  0

     8   

  SHARED VOTING POWER

 

  212,875

     9   

  SOLE DISPOSITIVE POWER

 

  0

   10   

  SHARED DISPOSITIVE POWER

 

  212,875

11    

  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

 

  212,875

12  

CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES

 

  ☐

13  

  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

 

  0.1%*

14  

  TYPE OF REPORTING PERSON

 

  PN

 

*

Calculation based on 207,282,536 shares of Class A Common Stock of the Issuer outstanding as of November 11, 2021, as reported by the Issuer in its Quarterly Report on Form 10-Q, as filed with the Securities and Exchange Commission on November 17, 2021.


CUSIP No. 00216W109    13D

 

  1    

  NAMES OF REPORTING PERSONS

 

  ADVENT PARTNERS GPE VII—A LIMITED PARTNERSHIP

  2  

  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

  (a)  ☐        (b)  ☒

 

  3  

  SEC USE ONLY

 

  4  

  SOURCE OF FUNDS

 

  N/A

  5  

  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e):

 

  ☐

  6  

  CITIZENSHIP OR PLACE OF ORGANIZATION

 

  DELAWARE

NUMBER OF

SHARES

BENEFICIALLY

OWNED BY

EACH

REPORTING

PERSON

WITH:

 

     7     

  SOLE VOTING POWER

 

  0

     8   

  SHARED VOTING POWER

 

  107,151

     9   

  SOLE DISPOSITIVE POWER

 

  0

   10   

  SHARED DISPOSITIVE POWER

 

  107,151

11    

  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

 

  107,151

12  

CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES

 

  ☐

13  

  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

 

  0.1%*

14  

  TYPE OF REPORTING PERSON

 

  PN

 

*

Calculation based on 207,282,536 shares of Class A Common Stock of the Issuer outstanding as of November 11, 2021, as reported by the Issuer in its Quarterly Report on Form 10-Q, as filed with the Securities and Exchange Commission on November 17, 2021.


CUSIP No. 00216W109    13D

 

  1    

  NAMES OF REPORTING PERSONS

 

  GPE VII ATI CO-INVESTMENT (DELAWARE) LIMITED PARTNERSHIP

  2  

  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

  (a)  ☐        (b)  ☒

 

  3  

  SEC USE ONLY

 

  4  

  SOURCE OF FUNDS

 

  N/A

  5  

  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e):

 

  ☐

  6  

  CITIZENSHIP OR PLACE OF ORGANIZATION

 

  DELAWARE

NUMBER OF

SHARES

BENEFICIALLY

OWNED BY

EACH

REPORTING

PERSON

WITH:

 

     7     

  SOLE VOTING POWER

 

  0

     8   

  SHARED VOTING POWER

 

  13,878,964

     9   

  SOLE DISPOSITIVE POWER

 

  0

   10   

  SHARED DISPOSITIVE POWER

 

  13,878,964

11    

  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

 

  13,878,964

12  

CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES

 

  ☐

13  

  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

 

  6.7%*

14  

  TYPE OF REPORTING PERSON

 

  PN

 

*

Calculation based on 207,282,536 shares of Class A Common Stock of the Issuer outstanding as of November 11, 2021, as reported by the Issuer in its Quarterly Report on Form 10-Q, as filed with the Securities and Exchange Commission on November 17, 2021.


This Amendment No. 2 (“Amendment No. 2”) amends and supplements the statement on Schedule 13D originally filed by the Reporting Persons on June 29, 2021 (as amended from time to time, the “Schedule 13D”). Unless otherwise indicated, each capitalized term used but not defined in this Amendment No. 2 shall have the meaning assigned to such term in the Schedule 13D.

 

Item 1.

Security and Issuer

This Statement on Schedule 13D relates to the Class A Common Stock, $0.0001 par value per share (the “Common Stock”), of ATI Physical Therapy, Inc. (the “Issuer” or the “Company”). The address of the principal executive offices of the Issuer is 790 Remington Boulevard, Bolingbrook, Illinois 60440.

 

Item 4.

Purpose of Transaction

Item 4 of the Schedule 13D is supplemented as follows:

On December 13, 2021, Wilco Acquisition distributed 560,979 shares of Common Stock, pro rata and in-kind to certain of its partners, for no consideration (the “Distribution”).

 

Item 5.

Interest in Securities of the Issuer

Item 5 of the Schedule 13D is supplemented as follows:

The information set forth or incorporated by reference in Items 2 and 6 of this Statement is incorporated by reference in this Item 5.

(a) and (b) The responses of the Reporting Persons to rows (7) through (13) of the cover pages of this Schedule 13D, as of December 13, 2021, are incorporated herein by reference. As of December 13, 2021, the Reporting Persons beneficially owned in the aggregate 116,391,635 shares of Common Stock, which represents approximately 56.2% of the outstanding shares.

The following table sets forth the aggregate number and percentage of the Common Stock beneficially owned by each Reporting Person as of December 13, 2021, after giving effect to the Distribution described in Item 4 of this Amendment No. 2, calculated in accordance with Rule 13d-3 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). The percentage of Common Stock owned was calculated based on 207,282,536 shares of Common Stock outstanding as of November 11, 2021, as reported by the Issuer in its Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on November 17, 2021.

 

Reporting Person

   Number of Shares
Beneficially Owned
     Percentage of
Common Stock
 

Advent International Corporation (1)(2)

     116,391,635        56.2

Advent International GPE VII, LLC (1)

     115,830,656        55.9

Wilco Acquisition, LP

     560,979        0.3

Wilco GP, Inc. (2)

     560,979        0.3

GPE VII GP S.a.r.l (3)

     64,664,696        31.2

GPE VII GP Limited Partnership (4)

     34,541,845        16.7

Advent International GPE VII Limited Partnership

     11,324,692        5.5

Advent International GPE VII-B Limited Partnership

     30,970,374        14.9

Advent International GPE VII-C Limited Partnership

     9,845,475        4.7

Advent International GPE VII-D Limited Partnership

     6,777,137        3.3

Advent International GPE VII-F Limited Partnership

     2,873,509        1.4


Advent International GPE VII-G Limited Partnership

     2,873,509        1.4

Advent International GPE VII-A Limited Partnership

     10,481,755        5.1

Advent International GPE VII-E Limited Partnership

     22,316,206        10.8

Advent International GPE VII-H Limited Partnership

     1,743,884        0.8

Advent Partners GPE VII—2014 Limited Partnership

     65,045        Less than 0.1

Advent Partners GPE VII—2014 Cayman Limited Partnership

     155,782        0.1

Advent Partners GPE VII—A 2014 Limited Partnership

     179,333        0.1

Advent Partners GPE VII—A 2014 Cayman Limited Partnership

     109,904        0.1

Advent Partners GPE VII—Cayman Limited Partnership

     806,132        0.4

Advent Partners GPE VII – B Cayman Limited Partnership

     1,063,662        0.5

Advent Partners GPE VII—Limited Partnership

     45,267        Less than 0.1

Advent Partners GPE VII – A Cayman Limited Partnership

     212,875        0.1

Advent Partners GPE VII – A Limited Partnership

     107,151        0.1

GPE VII ATI Co-Investment (Delaware) Limited Partnership

     13,878,964        6.7

 

(1)

Advent Top GP, as the manager of Advent GP Luxembourg and the general partner of each of Advent GP Cayman, the Advent Partners Funds and Advent Co-Invest Fund, and Advent, as the manager of Advent Top GP, may each be deemed to beneficially own the 115,830,656 shares of Common Stock held directly by the Advent Funds.

(2)

Wilco GP, as the general partner of Wilco Acquisition, and Advent, an affiliate of Wilco GP, may each be deemed to beneficially own the 560,979 shares of Common Stock held directly by Wilco Acquisition.

(3)

Advent GP Luxembourg, as the general partner of each of the Advent Luxembourg Funds, may be deemed to beneficially own the 64,664,696 shares of Common Stock held directly by the Advent Luxembourg Funds.

(4)

Advent GP Cayman, as the general partner of each of the Advent Cayman Funds, may be deemed to beneficially own the 34,541,845 shares of Common Stock held directly by the Advent Cayman Funds.

The foregoing excludes the contingent right by Wilco Acquisition to receive up to 15,000,000 Earnout Shares (as defined and described in Item 6 of this Statement).

As a result of the Transaction Agreements (as defined and described in Item 6 of this Statement), the Reporting Persons may be deemed to constitute a “group” within the meaning of Section 13(d)(3) of Exchange Act. This Schedule 13D shall not be construed as an admission by the Reporting Persons that the Reporting Persons are, for the purposes of Section 13(d) of the Exchange Act, the beneficial owners of any shares of Common Stock covered by the Transaction Agreements.

(c) Except pursuant to the Distribution, none of the Reporting Persons effected transactions in Common Stock during the past 60 days. To the Reporting Persons’ knowledge, none of the individuals listed on Schedule A to this Statement effected transactions in Common Stock during the past 60 days.

(d) Under certain circumstances, partners, members or shareholders of the Reporting Persons, as the case may be, could have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, shares of Common Stock owned by such Reporting Person.

(e) Inapplicable.

 

Item 7.

Material to Be Filed as Exhibits

 

Exhibit No.    Description
1    Joint Filing Agreement, dated as of December 15, 2021, by and among the Reporting Persons (filed herewith).


Signature

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this Statement is true, complete and correct.

 

Date: December 15, 2021     ADVENT INTERNATIONAL CORPORATION
   

/s/ Neil Crawford

    Name:   Neil Crawford
    Title:   Director, Fund Administration
Date: December 15, 2021     WILCO ACQUISITION, LP
    By: WILCO GP, INC., GENERAL PARTNER
   

/s/ John Maldonado

    Name:   John Maldonado
    Title:   President
Date: December 15, 2021     WILCO GP, INC.
   

/s/ John Maldonado

    Name:   John Maldonado
    Title:   President
Date: December 15, 2021     ADVENT INTERNATIONAL GPE VII LIMITED
    PARTNERSHIP
    ADVENT INTERNATIONAL GPE VII-B LIMITED
    PARTNERSHIP
    ADVENT INTERNATIONAL GPE VII-C LIMITED
    PARTNERSHIP
    ADVENT INTERNATIONAL GPE VII-D LIMITED
    PARTNERSHIP
    ADVENT INTERNATIONAL GPE VII-F LIMITED
    PARTNERSHIP
    ADVENT INTERNATIONAL GPE VII-G LIMITED
    PARTNERSHIP
   

By: GPE VII GP S.A.R.L., GENERAL PARTNER

    By: ADVENT INTERNATIONAL GPE VII, LLC,
    MANAGER and
   

/s/ Justin Nuccio

    Name:   Justin Nuccio
    Title:   Manager
    By: ADVENT INTERNATIONAL CORPORATION,
    MANAGER
   

/s/ Neil Crawford

    Name:   Neil Crawford
    Title:   Director, Fund Administration


    ADVENT INTERNATIONAL GPE VII-A LIMITED
Date: December 15, 2021     PARTNERSHIP
    ADVENT INTERNATIONAL GPE VII-E LIMITED
    PARTNERSHIP
    ADVENT INTERNATIONAL GPE VII-H LIMITED
    PARTNERSHIP
    By: GPE VII GP LIMITED PARTNERSHIP, GENERAL
    PARTNER
    By: ADVENT INTERNATIONAL GPE VII, LLC,
    GENERAL PARTNER
    By: ADVENT INTERNATIONAL CORPORATION,
    MANAGER
   

/s/ Neil Crawford

    Name: Neil Crawford
    Title: Director, Fund Administration

 

Date: December 15, 2021     ADVENT PARTNERS GPE VII 2014 LIMITED
    PARTNERSHIP
    ADVENT PARTNERS GPE VII 2014 CAYMAN
    LIMITED PARTNERSHIP
    ADVENT PARTNERS GPE VII—A 2014 LIMITED
    PARTNERSHIP
    ADVENT PARTNERS GPE VII—A 2014 CAYMAN
    LIMITED PARTNERSHIP
    ADVENT PARTNERS GPE VII CAYMAN LIMITED
    PARTNERSHIP
    ADVENT PARTNERS GPE VII—B CAYMAN
    LIMITED PARTNERSHIP
    ADVENT PARTNERS GPE VII LIMITED
    PARTNERSHIP
    ADVENT PARTNERS GPE VII—A CAYMAN
    LIMITED PARTNERSHIP
    ADVENT PARTNERS GPE VII—A LIMITED
    PARTNERSHIP
    By: ADVENT INTERNATIONAL GPE VII, LLC,
    GENERAL PARTNER
    By: ADVENT INTERNATIONAL CORPORATION,
    MANAGER
   

/s/ Neil Crawford

    Name: Neil Crawford
    Title: Director, Fund Administration
Date: December 15, 2021     GPE VII ATI CO-INVESTMENT (DELAWARE) LIMITED PARTNERSHIP
    By: ADVENT INTERNATIONAL GPE VII, LLC,
    GENERAL PARTNER


    By: ADVENT INTERNATIONAL CORPORATION,
    MANAGER
   

/s/ Neil Crawford

    Name: Neil Crawford
    Title: Director, Fund Administration
Date: December 15, 2021     GPE VII GP S.A.R.L.
    By: ADVENT INTERNATIONAL GPE VII, LLC,
    MANAGER and
   

/s/ Justin Nuccio

    Name: Justin Nuccio
    Title: Manager
    By: ADVENT INTERNATIONAL CORPORATION,
    MANAGER
   

/s/ Neil Crawford

    Name: Neil Crawford
    Title: Director, Fund Administration

 

Date: December 15, 2021     GPE VII GP LIMITED PARTNERSHIP
    By: ADVENT INTERNATIONAL GPE VII, LLC,
    GENERAL PARTNER
    By: ADVENT INTERNATIONAL CORPORATION,
    MANAGER
   

/s/ Neil Crawford

    Name: Neil Crawford
    Title: Director, Fund Administration
Date: December 15, 2021     ADVENT INTERNATIONAL GPE VII, LLC
    By: ADVENT INTERNATIONAL CORPORATION,
    MANAGER
   

/s/ Neil Crawford

    Name: Neil Crawford
    Title: Director, Fund Administration

 

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