---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-26-094301"
form_type: "8-K"
ticker: "SABR"
cik: "0001597033"
company_name: "Sabre Corp"
filed_at: "2026-03-05T23:59:59+00:00"
generated_at: "2026-05-15T19:40:18.235271+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.7
calibrated_materiality_score: 0.7
confidence: "high"
source: SEC EDGAR
---

# Sabre appoints Constellation Software exec to board; ends poison pill

## Summary
- Appoints Damian McKay (CEO Vela Software, Constellation division) to Sabre board; effective within 10 business days.
- Constellation holds ~12.7% of Sabre shares; standstill caps ownership at 15% during specified period.
- Sabre terminates March 1, 2026 shareholder rights plan (poison pill); expiration accelerated to close on March 6, 2026.
- Constellation withdraws prior director nomination notice; parties agree to mutual non-disparagement and confidentiality.
- McKay will serve on Technology Committee; receives annual cash retainer of $90,000 plus equity awards.

## SEC filing metadata
- accession: 0001193125-26-094301
- form_type: 8-K
- ticker: SABR
- cik: 0001597033
- company_name: Sabre Corp
- filed_at: 2026-03-05T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.7
- calibrated_materiality_score: 0.7
- confidence: high
- sec_items: 1.01, 5.02, 1.02, 3.03, 5.03, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1597033/000119312526094301/0001193125-26-094301-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1597033/000119312526094301/d87762d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-26-094301
- JSON: https://secwatch.observer/filing/0001193125-26-094301.json
- Plain text: https://secwatch.observer/filing/0001193125-26-094301.txt

## Key facts
- Governance Changes
  Sabre Corp: Filed a Certificate of Designations of Series B Preferred Stock in connection with adoption of a Rights Agreement (effective 2026-03-01).
  - Change: charter amendment
  - Effective: 2026-03-01
  source text: In connection with the adoption of the Rights Agreement, on March 1, 2026, the Company filed a Certificate of Designations of Series B Preferred Stock with the Secretary of State of the State of Delaware setting forth the rights, powers and preferences of the Series B Preferred Stock issuable upon exercise of the Rights (the “Preferred Shares”).
  evidence_url: https://www.sec.gov/Archives/edgar/data/1597033/000119312526094301/0001193125-26-094301-index.htm
- Material Agreements
  Sabre Corp entered into Strategic Governance Agreement with Constellation Canadian Holdings Inc. and Constellation Software Inc. (effective 2026-03-05).
  - Action: entry
  - Counterparty: Constellation Canadian Holdings Inc. and Constellation Software Inc.
  - Effective: 2026-03-05
  source text: On March 5, 2026 (the "Effective Date"), Sabre Corporation, a Delaware corporation (the "Company") entered into a Strategic Governance Agreement (the "Agreement") with Constellation Canadian Holdings Inc., an Ontario corporation and Constellation Software Inc., an Ontario corporation
  evidence_url: https://www.sec.gov/Archives/edgar/data/1597033/000119312526094301/0001193125-26-094301-index.htm

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.