# EDGAR Filing Document

**Accession Number:** 0001597033
**File Stem:** 0000921895-26-000836
**Filing Date:** 2026-3
**Character Count:** 10628
**Document Hash:** 842c06f44fba31373b021a8635e2c2fd
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000921895-26-000836.hdr.sgml**: 20260330

**ACCESSION NUMBER**: 0000921895-26-000836

**CONFORMED SUBMISSION TYPE**: 3/A

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20260227

**FILED AS OF DATE**: 20260330

**DATE AS OF CHANGE**: 20260330

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** CONSTELLATION SOFTWARE INC
- **CENTRAL INDEX KEY:** 0001113678
- **STANDARD INDUSTRIAL CLASSIFICATION:** SERVICES-PREPACKAGED SOFTWARE [7372]
- **ORGANIZATION NAME:** 06 Technology
- **STATE OF INCORPORATION:** A6

**FILING VALUES:**
- **FORM TYPE:** 3/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-36422
- **FILM NUMBER:** 26816170

**BUSINESS ADDRESS:**
- **ADDRESS IS A NON US LOCATION:** YES
- **STREET 1:** 66 WELLINGTON STREET WEST, SUITE 5300
- **STREET 2:** TD BANK TOWER
- **CITY:** TORONTO
- **PROVINCE COUNTRY:** A6
- **ZIP:** M5K 1E6
- **BUSINESS PHONE:** 4168612281

**MAIL ADDRESS:**
- **ADDRESS IS A NON US LOCATION:** YES
- **STREET 1:** 66 WELLINGTON STREET WEST, SUITE 5300
- **STREET 2:** TD BANK TOWER
- **CITY:** TORONTO
- **PROVINCE COUNTRY:** A6
- **ZIP:** M5K 1E6
**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Miller Mark Robert
- **CENTRAL INDEX KEY:** 0002123494

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 3/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-36422
- **FILM NUMBER:** 26816168

**MAIL ADDRESS:**
- **ADDRESS IS A NON US LOCATION:** YES
- **STREET 1:** 66 WELLINGTON STREET WEST, SUITE 5300
- **STREET 2:** TD BANK TOWER
- **CITY:** TORONTO
- **PROVINCE COUNTRY:** A6
- **ZIP:** M5K 1E6
**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Constellation Canadian Holdings Inc.
- **CENTRAL INDEX KEY:** 0002120544

**ORGANIZATION NAME:**
- **STATE OF INCORPORATION:** A6
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 3/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-36422
- **FILM NUMBER:** 26816169

**BUSINESS ADDRESS:**
- **ADDRESS IS A NON US LOCATION:** YES
- **STREET 1:** 66 WELLINGTON STREET WEST, SUITE 5300
- **STREET 2:** TD BANK TOWER
- **CITY:** TORONTO
- **PROVINCE COUNTRY:** A6
- **ZIP:** M5K 1E6
- **BUSINESS PHONE:** 4168612281

**MAIL ADDRESS:**
- **ADDRESS IS A NON US LOCATION:** YES
- **STREET 1:** 66 WELLINGTON STREET WEST, SUITE 5300
- **STREET 2:** TD BANK TOWER
- **CITY:** TORONTO
- **PROVINCE COUNTRY:** A6
- **ZIP:** M5K 1E6
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Sabre Corp
- **CENTRAL INDEX KEY:** 0001597033
- **STANDARD INDUSTRIAL CLASSIFICATION:** SERVICES-COMPUTER PROGRAMMING, DATA PROCESSING, ETC. [7370]
- **ORGANIZATION NAME:** 06 Technology
- **EIN:** 208647322
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 3150 SABRE DRIVE
- **CITY:** SOUTHLAKE
- **STATE:** TX
- **ZIP:** 76092
- **BUSINESS PHONE:** 682 605 1000

**MAIL ADDRESS:**
- **STREET 1:** 3150 SABRE DRIVE
- **CITY:** SOUTHLAKE
- **STATE:** TX
- **ZIP:** 76092

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## FORM 3/A

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

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

[ ] 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**<sup>*</sup><br>CONSTELLATION SOFTWARE INC<br><sub>(Last) (First) (Middle)</sub><br>66 WELLINGTON STREET WEST, SUITE 5300<br>TD BANK TOWER<br><sub>(Street)</sub><br>TORONTO, ONTARIO, CANADA M5K 1E6<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2026-02-27 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Sabre Corp [ SABR ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[ ] Form filed by One Reporting Person<br>[X] Form filed by More than One Reporting Person |

---

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>Constellation Canadian Holdings Inc.<br><sub>(Last) (First) (Middle)</sub><br>66 WELLINGTON STREET WEST, SUITE 5300<br>TD BANK TOWER<br><sub>(Street)</sub><br>TORONTO, ONTARIO, CANADA M5K 1E6<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2026-02-27 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Sabre Corp [ SABR ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[ ] Form filed by One Reporting Person<br>[X] Form filed by More than One Reporting Person |

---

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>Miller Mark Robert<br><sub>(Last) (First) (Middle)</sub><br>66 WELLINGTON STREET WEST, SUITE 5300<br>TD BANK TOWER<br><sub>(Street)</sub><br>TORONTO, ONTARIO, CANADA M5K 1E6<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2026-02-27 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Sabre Corp [ SABR ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[ ] Form filed by One Reporting Person<br>[X] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | 3. Transaction Code (V) | 3. Transaction Code (V) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | Code | V | Amount | (A) or (D) | Price | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| Common Stock, $0.01 par value<sup>(1)</sup> |  |  |  |  |  |  |  | 39522821 | D<sup>(2)</sup> |  |

---

## Table II - Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | 4. Transaction Code (V) | 4. Transaction Code (V) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 6. Date Exercisable and Expiration Date | 6. Date Exercisable and Expiration Date | 7. Title and Amount of Underlying Securities | 7. Title and Amount of Underlying Securities | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | Code | V | (A) | (D) | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

---

### Footnotes:

(1) This Form 3 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.

**Remarks:**
This Form 3 is being amended to add each of Constellation Canadian Holdings Inc. and Mr. Miller as a reporting person upon receipt of their EDGAR codes.

**Signature:** /s/ Constellation Software Inc., By Mark Dennison, Secretary and General Counsel  
**Date:** 2026-03-30

**Signature:** /s/ Constellation Canadian Holdings Inc., By Jamal Baksh, Chief Financial Officer  
**Date:** 2026-03-30

**Signature:** /s/ Mark Miller  
**Date:** 2026-03-30

### Remarks:

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.**