SEC FORM 4/A SEC Form 4
FORM 4 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
or Section 30(h) of the Investment Company Act of 1940
 
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checkbox unchecked Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
checkbox unchecked Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
CONSTELLATION SOFTWARE INC

(Last) (First) (Middle)
66 WELLINGTON STREET WEST, SUITE 5300
TD BANK TOWER

(Street)
TORONTO A6 M5K 1E6

(City) (State) (Zip)
2. Issuer Name and Ticker or Trading Symbol
Sabre Corp [ SABR ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director checkbox checked 10% Owner
Officer (give title below) Other (specify below)
3. Date of Earliest Transaction (Month/Day/Year)
02/27/2026
4. If Amendment, Date of Original Filed (Month/Day/Year)
03/03/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
Form filed by One Reporting Person
checkbox checked 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. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 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
Common Stock, $0.01 par value(1) 02/27/2026 P 10,634,702 A $1.1605(3) 50,157,523 D(2)
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 (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 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 (Month/Day/Year) 7. 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: 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
1. Name and Address of Reporting Person*
CONSTELLATION SOFTWARE INC

(Last) (First) (Middle)
66 WELLINGTON STREET WEST, SUITE 5300
TD BANK TOWER

(Street)
TORONTO A6 M5K 1E6

(City) (State) (Zip)
1. Name and Address of Reporting Person*
Constellation Canadian Holdings Inc.

(Last) (First) (Middle)
66 WELLINGTON STREET WEST, SUITE 5300
TD BANK TOWER

(Street)
TORONTO A6 M5K 1E6

(City) (State) (Zip)
1. Name and Address of Reporting Person*
Miller Mark Robert

(Last) (First) (Middle)
66 WELLINGTON STREET WEST, SUITE 5300
TD BANK TOWER

(Street)
TORONTO A6 M5K 1E6

(City) (State) (Zip)
Explanation of Responses:
1. This Form 4 is filed jointly by Constellation Software Inc ("Constellation Software"), Constellation Canadian Holdings Inc. ("Constellation Holdings"), and Mark Miller (collectively, the "Reporting Persons"). The EDGAR filing codes for Constellation Holdings and Mark Miller were not available at the time of this required filing, and the Reporting Persons intend to amend this Form 3 to include such Reporting Persons in the filing when such codes are available. Each Reporting Person disclaims beneficial ownership of the securities of the Issuer 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.
2. Securities owned directly by Constellation Holdings. As the direct parent company of Constellation Holdings, Constellation Software may be deemed to beneficially own the securities owned directly by Constellation Holdings. Mr. Miller, as the President of Constellation Software, may be deemed to beneficially own the securities owned directly by Constellation Holdings.
3. The reported price represents a weighted average price. These shares were purchased in multiple transactions at prices ranging from $1.07 to $1.24 per share. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote.
Remarks:
This Form 4 is being amended to add each of Constellation Canadian Holdings Inc. and Mr. Miller as a reporting person upon receipt of their EDGAR codes.
/s/ Constellation Software Inc., By Mark Dennison, Secretary and General Counsel 03/30/2026
/s/ Constellation Canadian Holdings Inc., By Jamal Baksh, Chief Financial Officer 03/30/2026
/s/ Mark Miller 03/30/2026
** Signature of Reporting Person Date
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).
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