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  4. [Form 3/A] Sabre Corp Amended Initial Statement of Beneficial Ownership

39,522,821 Sabre (SABR) shares reported by Constellation group

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
3/A

Rhea-AI Filing Summary

Sabre Corp insider filing: Constellation Software Inc., together with Constellation Canadian Holdings Inc. and Mark Miller, reports an initial ownership position in Sabre Corp. The filing shows that Constellation Canadian Holdings Inc. directly owns 39,522,821 shares of Sabre common stock, and Constellation Software and Mr. Miller may be deemed to beneficially own these shares through their relationship to Constellation Canadian Holdings Inc., while each expressly disclaims beneficial ownership beyond any pecuniary interest.

Positive

  • None.

Negative

  • None.
Insider CONSTELLATION SOFTWARE INC, Constellation Canadian Holdings Inc., Miller Mark Robert
Role 10% Owner | 10% Owner | 10% Owner
Type Security Shares Price Value
holding Common Stock, $0.01 par value -- -- --
Holdings After Transaction: Common Stock, $0.01 par value — 39,522,821 shares (Direct)
Footnotes (1)
  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. 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.
Sabre shares owned 39,522,821 shares Common Stock owned directly by Constellation Canadian Holdings Inc.
beneficial ownership financial
"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"
Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.
pecuniary interest financial
"except to the extent of his or its pecuniary interest therein"
Section 16 regulatory
"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"
Section 16 is a U.S. securities law rule that governs the trading and disclosure obligations of company insiders — typically officers, directors and large shareholders — to promote transparency and deter unfair profit-taking. It requires insiders to publicly report their stock trades and allows companies or the issuer to reclaim quick, short-term profits from certain insider trades, like a scoreboard and a refund policy that help investors see and limit possible insider advantage.
ten percent owner regulatory
"is_ten_percent_owner": 1"
Common Stock, $0.01 par value financial
"security_title": "Common Stock, $0.01 par value""
Understanding Insider Trading Forms →
SEC Form 3
FORM 3UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF 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
OMB APPROVAL
OMB Number:3235-0104
Estimated average burden
hours per response:0.5
1. Name and Address of Reporting Person*
CONSTELLATION SOFTWARE INC
(Last)(First)(Middle)
66 WELLINGTON STREET WEST, SUITE 5300
TD BANK TOWER
(Street)
TORONTOM5K 1E6
(City)(State)(Zip)
ONTARIO, CANADA
(Country)		2. Date of Event Requiring Statement (Month/Day/Year)
02/27/2026		3. Issuer Name and Ticker or Trading Symbol
Sabre Corp [ SABR ]
3a. Foreign Trading Symbol
5. If Amendment, Date of Original Filed (Month/Day/Year)
03/03/2026
4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
DirectorX10% Owner
Officer (give title below)Other (specify below)
6. Individual or Joint/Group Filing (Check Applicable Line)
Form filed by One Reporting Person
XForm filed by More than One Reporting Person
Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock, $0.01 par value(1)39,522,821D(2)
Table II - Derivative Securities Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4) 2. Date Exercisable and Expiration Date (Month/Day/Year)3. Title and Amount of Securities Underlying Derivative Security (Instr. 4) 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 6. Nature of Indirect Beneficial Ownership (Instr. 5)
Date ExercisableExpiration DateTitleAmount 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)
TORONTOM5K 1E6
(City)(State)(Zip)
ONTARIO, CANADA
(Country)
Relationship of Reporting Person(s) to Issuer
DirectorX10% Owner
Officer (give title below)Other (specify below)
1. Name and Address of Reporting Person*
Constellation Canadian Holdings Inc.
(Last)(First)(Middle)
66 WELLINGTON STREET WEST, SUITE 5300
TD BANK TOWER
(Street)
TORONTOM5K 1E6
(City)(State)(Zip)
ONTARIO, CANADA
(Country)
Relationship of Reporting Person(s) to Issuer
DirectorX10% Owner
Officer (give title below)Other (specify below)
1. Name and Address of Reporting Person*
Miller Mark Robert
(Last)(First)(Middle)
66 WELLINGTON STREET WEST, SUITE 5300
TD BANK TOWER
(Street)
TORONTOM5K 1E6
(City)(State)(Zip)
ONTARIO, CANADA
(Country)
Relationship of Reporting Person(s) to Issuer
DirectorX10% Owner
Officer (give title below)Other (specify below)
Explanation of Responses:
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.
/s/ Constellation Software Inc., By Mark Dennison, Secretary and General Counsel03/30/2026
/s/ Constellation Canadian Holdings Inc., By Jamal Baksh, Chief Financial Officer03/30/2026
/s/ Mark Miller03/30/2026
** 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 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).
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.
* Form 3: SEC 1473 (03-26)

Source: View Original Filing on SEC EDGAR

FAQ

How many Sabre Corp (SABR) shares are reported in this Form 3/A?

The filing reports that Constellation Canadian Holdings Inc. directly owns 39,522,821 shares of Sabre Corp common stock. This reflects a large ownership stake and supports the filer’s status as a ten percent owner under Section 16 reporting rules.

Who directly owns the Sabre Corp (SABR) shares in this Form 3/A?

The shares are owned directly by Constellation Canadian Holdings Inc.. Constellation Software Inc., as its direct parent, and Mark Miller, as President of Constellation Software, may be deemed to beneficially own the same shares through that relationship under Section 16 concepts.

What does the Form 3/A say about beneficial ownership of Sabre (SABR) shares?

Each reporting person disclaims beneficial ownership of Sabre securities except to the extent of their pecuniary interest. This language limits how their ownership should be interpreted for Section 16 and other legal purposes while still fulfilling mandatory disclosure requirements.

Why are multiple reporting persons listed in this Sabre Corp (SABR) Form 3/A?

The Form 3/A is filed jointly by Constellation Software Inc., Constellation Canadian Holdings Inc., and Mark Miller. Their roles as parent company and executive tied to the direct owner require joint reporting, even though Constellation Canadian Holdings Inc. holds the Sabre shares directly.

Does this Sabre (SABR) Form 3/A show a new buy or sell transaction?

The entry is classified as a holding with 39,522,821 shares shown as owned following the reported date. There is no explicit buy or sell transaction code; the form primarily establishes the reporting persons’ ownership position under Section 16 rules.