Teradyne Director Marilyn Matz Files Form 144 to Sell 800 Shares

Executive Summary

On October 15, 2026, Marilyn Matz, a Director of Teradyne, Inc. ($TER), filed a Form 144 notice disclosing the proposed sale of 800 shares of common stock with an aggregate market value of $273,024.00. The sale is being executed through Fidelity Brokerage Services LLC under a Rule 10b5-1 trading plan adopted on February 13, 2026.

Key Transaction Specifics

• Proposed Sale Volume: 800 shares of Common Stock.
• Estimated Aggregate Market Value: $273,024.00 (~$341.28 per share).
• Securities Outstanding: 156,340,750 shares outstanding as of the filing, making the transaction represent approximately 0.0005% of total outstanding stock.
• Origin of Shares: Acquired through restricted stock vesting events on May 7, 2021 (44 shares) and May 9, 2024 (756 shares) as board compensation.

Trading History (Past 3 Months)

Marilyn Matz has executed multiple scheduled sales over the previous three months under the same plan:

• July 15, 2026: 1,200 shares ($427,572.00)
• August 17, 2026: 1,200 shares ($510,000.00)
• September 15, 2026: 800 shares ($270,264.00)
• September 17, 2026: 400 shares ($140,444.00)

Market Impact & Significance

Trading significance is rated as Low. The transaction is routine, modest in size relative to the issuer's market capitalization and float, and executed under a pre-established Rule 10b5-1 plan established in February 2026.