---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-22-125493"
form_type: "8-K"
ticker: "CERT"
cik: "0001827090"
company_name: "Certara, Inc."
filed_at: "2022-12-08T23:59:59+00:00"
generated_at: "2026-06-21T07:42:10.559468+00:00"
event_type: "m_and_a"
sentiment: "positive"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# Certara announces $449M stock purchase by Arsenal Capital Partners at $15/share; David Spaight joins board

## Summary
- Arsenal Capital Partners closed $449M purchase of 29,954,521 shares from EQT at $15.00/share.
- David Spaight appointed to Board; Eric Liu and Ethan Waxman resign (EQT representatives).
- Arsenal agreed to two-year lock-up on new shares, signaling long-term commitment.
- Stephen McLean remains on Board; moves to Nominating and Corporate Governance Committee from Audit.

## SEC filing metadata
- accession: 0001104659-22-125493
- form_type: 8-K
- ticker: CERT
- cik: 0001827090
- company_name: Certara, Inc.
- filed_at: 2022-12-08T23:59:59+00:00
- event_type: m_and_a
- sentiment: positive
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 5.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1827090/000110465922125493/0001104659-22-125493-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1827090/000110465922125493/tm2232188d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-22-125493
- JSON: https://secwatch.observer/filing/0001104659-22-125493.json
- Plain text: https://secwatch.observer/filing/0001104659-22-125493.txt

## Key facts
- Executive change
  David Spaight was appointed as Director at Certara, Inc..
  - Action: appointed
  - Role: Director
  source text: Also on December 8, 2022, David Spaight was appointed to the Board, effective upon the closing, as a Class I director with a term expiring at the Company’s 2024 Annual Meeting of Shareholders, and Mr. Spaight was appointed to serve as a member of the Board’s Compensation Committee, effective upon the closing.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1827090/000110465922125493/0001104659-22-125493-index.htm
- Executive change
  Ethan Waxman resigned as Director at Certara, Inc..
  - Action: resigned
  - Role: Director
  source text: On December 8, 2022, in connection with the closing of the Sale Transaction (as defined below) (the “closing”), Eric Liu and Ethan Waxman, each a member of the Board of Directors (the “Board”) of Certara, Inc. (the “Company”), each notified the Company of his decision to resign as a director of the Company, effective upon the closing.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1827090/000110465922125493/0001104659-22-125493-index.htm
- Executive change
  Eric Liu resigned as Director at Certara, Inc..
  - Action: resigned
  - Role: Director
  source text: On December 8, 2022, in connection with the closing of the Sale Transaction (as defined below) (the “closing”), Eric Liu and Ethan Waxman, each a member of the Board of Directors (the “Board”) of Certara, Inc. (the “Company”), each notified the Company of his decision to resign as a director of the Company, effective upon the closing.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1827090/000110465922125493/0001104659-22-125493-index.htm

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