On October 26, 2023, Mervin Dunn and John Staer, each a member of the Board of Directors (the ?Board?) of TransDigm Group Incorporated (the ?Company?), gave notice of their resignation from the Board and as a member of the Board committees on which they serve, effective immediately. Neither Mr. Dunn nor Mr. Staer is resigning from the Board because of any disagreement with the Company on any matter relating to the Company?s operations, policies, or practices. Mr. Dunn joined the Board in 2009.

Prior to his resignation, he served as a member of the Board?s Compensation Committee and Nominating & Corporate Governance Committee. Mr. Staer joined the Board in 2012. Prior to his resignation, he served as a member of the Board?s Audit Committee and Nominating & Corporate Governance Committee.

The Company thanks both Mr. Dunn and Mr. Staer for their service and commitment to the Company.