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Constellation Software’s 12.7% Sabre Corp (SABR) stake comes with new board seat

Filing Impact
(Moderate)
Filing Sentiment
(Neutral)
Form Type
SCHEDULE 13D

Rhea-AI Filing Summary

Constellation Software and affiliates have disclosed a major stake in Sabre Corp, alongside a board seat and governance deal. Constellation Canadian Holdings directly beneficially owns 50,157,523 Sabre common shares, about 12.7% of the 395,165,033 shares outstanding as of February 10, 2026, at an aggregate cost basis of $86,178,338.

On March 5, 2026, Sabre and certain Constellation entities entered into a strategic governance agreement. Sabre agreed to appoint Damian McKay to its board and nominate him for election at the 2026 annual meeting, while Constellation accepted a standstill capping its beneficial ownership and economic exposure at 15% during a defined period and agreed to vote largely in line with Sabre’s board recommendations.

The agreement also accelerates the expiration of Sabre’s stockholder rights plan to the next business day after a specified acceleration date and includes mutual non-disparagement and confidentiality provisions. Constellation indicates it may adjust its Sabre investment over time and intends ongoing engagement with Sabre’s management and board on profitability, balance sheet, growth, and governance topics.

Positive

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Insights

Constellation gains influence at Sabre with a 12.7% stake and board seat under a standstill.

Constellation Canadian Holdings directly beneficially owns 50,157,523 Sabre shares, about 12.7% of outstanding stock as of February 10, 2026, acquired for an aggregate cost basis of $86,178,338. This positions Constellation as a significant shareholder with potential to shape discussions.

The strategic governance agreement dated March 5, 2026 adds Damian McKay to Sabre’s board and commits Sabre to nominate him at the 2026 annual meeting. In return, Constellation accepts a standstill capping Beneficial Ownership and economic exposure at 15% during the specified period and agrees to generally vote with the board, with limited exceptions tied to proxy advisory recommendations and Extraordinary Transactions.

The deal also accelerates the Final Expiration Date of Sabre’s stockholder rights plan to the next business day after the Acceleration Date, reducing overhang from the rights plan. Future company filings around the 2026 annual meeting and any subsequent changes in Constellation’s ownership or governance terms will show how this relationship evolves.






MARK DENNISON
CONSTELLATION SOFTWARE INC., 66 Wellington St. W, Suite 5300
Toronto, A6, M5K 1E6
416-861-2279


ANDREW FREEDMAN & IAN ENGORON
OLSHAN FROME WOLOSKY LLP, 1325 Avenue of the Americas
New York, NY, 10019
212-451-2300

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)
02/26/2026

(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 of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box.

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).






SCHEDULE 13D






SCHEDULE 13D






SCHEDULE 13D






SCHEDULE 13D


CONSTELLATION SOFTWARE INC
Signature:/s/ Mark Dennison
Name/Title:Mark Dennison, General Counsel and Secretary
Date:03/05/2026
CONSTELLATION CANADIAN HOLDINGS INC.
Signature:/s/ Jamal Baksh
Name/Title:Jamal Baksh, Chief Financial Officer
Date:03/05/2026
MARK MILLER
Signature:/s/ Mark Miller
Name/Title:Mark Miller
Date:03/05/2026

FAQ

How large is Constellation Software’s ownership stake in Sabre Corp (SABR)?

Constellation Canadian Holdings directly beneficially owns 50,157,523 Sabre common shares, representing about 12.7% of the 395,165,033 shares outstanding as of February 10, 2026. Constellation Software and Mark Miller may be deemed to share beneficial ownership of this same 12.7% stake.

What price did Constellation pay for its Sabre Corp (SABR) shares?

Constellation Canadian Holdings’ aggregate cost basis for 50,157,523 Sabre shares is $86,178,338, including brokerage commissions. The shares were acquired in the open market and through settlement of certain physically settled swaps, as detailed in an exhibit listing individual transactions.

What board changes at Sabre Corp (SABR) are tied to Constellation’s investment?

Under a March 5, 2026 strategic governance agreement, Sabre agreed to appoint Damian McKay to its board and nominate him for election at the 2026 annual meeting. Sabre also agreed to recommend that stockholders vote for McKay and to use reasonable best efforts to secure his election.

What standstill and voting commitments did Constellation make regarding Sabre Corp (SABR)?

Constellation agreed not to acquire Beneficial Ownership and economic exposure above 15% of Sabre’s outstanding shares during a defined Specified Period. It also agreed to vote generally in line with Sabre’s board recommendations, with limited exceptions for certain proposals and Extraordinary Transactions described in the agreement.

How does the governance agreement affect Sabre Corp (SABR)’s stockholder rights plan?

Sabre agreed to amend its stockholder rights plan so that the Final Expiration Date is accelerated to the next immediate business day following a defined Acceleration Date, which is within two business days after the March 5, 2026 effective date of the strategic governance agreement.

What future actions might Constellation consider regarding its Sabre Corp (SABR) investment?

Constellation states it will review its Sabre investment on an ongoing basis and may buy or sell shares, adjust its economic exposure through financial instruments, or engage with Sabre’s management, board, stockholders, and third parties on operations, capital structure, governance, and potential business combinations, subject to the agreement’s terms.
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