TER · Teradyne, Inc · Insider Trading

Represents DSUs issued to the Reporting Person in accordance with his election to receive dividends paid on DSUs in the form of additional DSUs in lieu of cash. Such acquisition is exempt under Exchange Act Rule 16b-3(d). DSUs are settled one-for-one in Common Stock generally within ninety days of the date as of which a non-employee director no longer serves in such capacity.

Represents deferred stock units ("DSUs") issued to the Reporting Person in accordance with his election to receive dividends paid on DSUs in the form of additional DSUs in lieu of cash. Such acquisition is exempt under Exchange Act Rule l 6b-3(d). DSUs are settled one-for-one in Common Stock generally within ninety days of the date as of which a non-employee director no longer serves in such capacity.

Represents DSUs issued to the Reporting Person in accordance with his election to receive dividends paid on DSUs in the form of additional DSUs in lieu of cash. Such acquisition is exempt under Exchange Act Rule 16b-3(d). DSUs are settled one-for-one in Common Stock generally within ninety days of the date as of which a non-employee director no longer serves in such capacity.

Represents the Reporting Person's deferral of his quarterly cash compensation into deferred stock units ("DSUs"). The number of DSUs is calculated based on the closing price of the Common Stock on their date of issuance. DSUs are settled one-for-one in Common Stock generally within ninety days of the date as of which a non-employee director no longer serves in such capacity.

Represents the Reporting Person's deferral of his quarterly cash compensation into deferred stock units ("DSUs"). The number of DSUs is calculated based on the closing price of the Common Stock on their date of issuance. DSUs are settled one-for-one in Common Stock generally within ninety days of the date as of which a non-employee director no longer serves in such capacity.

Represents the Reporting Person's deferral of his quarterly cash compensation into deferred stock units ("DSUs"). The number of DSUs is calculated based on the closing price of the Common Stock on their date of issuance. DSUs are settled one-for-one in Common Stock generally within ninety days of the date as of which a non-employee director no longer serves in such capacity.

The reported transaction was effected pursuant to a sales plan adopted by the Reporting Person on February 13, 2026 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934.

The reported transactions were effected pursuant to a sales plan adopted by the Reporting Person on February 12, 2026 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934.

The reported transaction was effected pursuant to a sales plan adopted by the Reporting Person on February 13, 2026 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934.

The shares were sold pursuant to a sales plan adopted by the Reporting Person on March 4, 2026 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934.

The reported transaction was effected pursuant to a sales plan adopted by the Reporting Person on February 13, 2026 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934.

The reported transactions were effected pursuant to a sales plan adopted by the Reporting Person on February 12, 2026 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934.

The shares were sold pursuant to a sales plan adopted by the Reporting Person on March 4, 2026 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934.

The reported transaction was effected pursuant to a sales plan adopted by the Reporting Person on February 13, 2026 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934.

The reported transactions were effected pursuant to a sales plan adopted by the Reporting Person on February 12, 2026 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934.

Includes 25.8346 shares acquired under the Issuer's Employee Stock Purchase Plan on June 30, 2026.

The shares were sold pursuant to a sales plan adopted by the Reporting Person on March 4, 2026 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934.

Represents the Reporting Person's deferral of his quarterly cash compensation into deferred stock units ("DSUs"). The number of DSUs is calculated based on the closing price of the Common Stock on their date of issuance. DSUs are settled one-for-one in Common Stock generally within ninety days of the date as of which a non-employee director no longer serves in such capacity.

Represents the Reporting Person's deferral of his quarterly cash compensation into deferred stock units ("DSUs"). The number of DSUs is calculated based on the closing price of the Common Stock on their date of issuance. DSUs are settled one-for-one in Common Stock generally within ninety days of the date as of which a non-employee director no longer serves in such capacity.

Represents the Reporting Person's deferral of his quarterly cash compensation into deferred stock units ("DSUs"). The number of DSUs is calculated based on the closing price of the Common Stock on their date of issuance. DSUs are settled one-for-one in Common Stock generally within ninety days of the date as of which a non-employee director no longer serves in such capacity.

The reported transaction was effected pursuant to a sales plan adopted by the Reporting Person on February 13, 2026 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934.

The reported transactions were effected pursuant to a sales plan adopted by the Reporting Person on February 12, 2026 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934.

Represents deferred stock units ("DSUs") issued to the Reporting Person in accordance with his election to receive dividends paid on DSUs in the form of additional DSUs in lieu of cash. Such acquisition is exempt under Exchange Act Rule 16b-3( d). DSUs are settled one-for-one in Common Stock generally within ninety days of the date as of which a non-employee director no longer serves in such capacity.

Represents deferred stock units ("DSUs") issued to the Reporting Person in accordance with his election to receive dividends paid on DSUs in the form of additional DSUs in lieu of cash. Such acquisition is exempt under Exchange Act Rule l 6b-3( d). DSUs are settled one-for-one in Common Stock generally within ninety days of the date as of which a non-employee director no longer serves in such capacity.

Represents deferred stock units ("DSUs") issued to the Reporting Person in accordance with his election to receive dividends paid on DSUs in the form of additional DSUs in lieu of cash. Such acquisition is exempt under Exchange Act Rule l 6b-3(d). DSUs are settled one-for-one in Common Stock generally within ninety days of the date as of which a non-employee director no longer serves in such capacity.

The shares were sold pursuant to a sales plan adopted by the Reporting Person on March 4, 2026 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934.

Shares withheld by the Issuer to satisfy the Reporting Person's tax withholding obligations in connection with the vesting of restricted stock units on June 2, 2026.

Shares withheld by the Issuer to satisfy the Reporting Person's tax withholding obligations in connection with the vesting of restricted stock units on June 1, 2026.

The reported transactions were effected pursuant to a sales plan adopted by the Reporting Person on February 19, 2026 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934.

The reported transactions were effected pursuant to a sales plan adopted by the Reporting Person on February 19, 2026 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934.

Shares withheld by the Issuer to pay the exercise price of the stock option exercise reported in this Form 4 and to satisfy the Reporting Person's tax withholding obligations in connection with such exercise.

The reported transactions were effected pursuant to a sales plan adopted by the Reporting Person on February 19, 2026 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934.

This option was granted under the Issuer's 2006 Equity and Cash Compensation Incentive Plan, and vests at the rate of 25% per year beginning on April 1, 2026, the first anniversary of the grant.

The reported transactions were effected pursuant to a sales plan adopted by the Reporting Person on February 19, 2026 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934.

The reported transaction was effected pursuant to a sales plan adopted by the Reporting Person on February 13, 2026 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934.

The reported transactions were effected pursuant to a sales plan adopted by the Reporting Person on February 12, 2026 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934.

The reported transaction was effected pursuant to a sales plan adopted by the Reporting Person on February 13, 2026 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934.

The reported transactions were effected pursuant to a sales plan adopted by the Reporting Person on February 12, 2026 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934.

This option was granted under the Issuer's 2006 Equity and Cash Compensation Incentive Plan, and became exercisable at the rate of 25% per year beginning on January 24, 2021, the first anniversary of the grant.

The reported transactions were effected pursuant to a sales plan adopted by the Reporting Person on February 12, 2026 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934.

Represents restricted stock units ("RSUs") granted to the Reporting Person under the Issuer's 2006 Equity and Cash Compensation Incentive Plan. Each RSU represents the right to receive one share of Common Stock. The RSUs are time-based, and will vest in full on the earlier of May 8, 2027 or the date of the Issuer's 2027 Annual Meeting of Shareholders.

Represents restricted stock units ("RSUs") granted to the Reporting Person under the Issuer's 2006 Equity and Cash Compensation Incentive Plan. Each RSU represents the right to receive one share of Common Stock. The RSUs are time-based, and will vest in full on the earlier of May 8, 2027 or the date of the Issuer's 2027 Annual Meeting of Shareholders.

Represents restricted stock units ("RSUs") granted to the Reporting Person under the Issuer's 2006 Equity and Cash Compensation Incentive Plan. Each RSU represents the right to receive one share of Common Stock. The RSUs are time-based, and will vest in full on the earlier of May 8, 2027 or the date of the Issuer's 2027 Annual Meeting of Shareholders.

Represents restricted stock units ("RSUs") granted to the Reporting Person under the Issuer's 2006 Equity and Cash Compensation Incentive Plan. Each RSU represents the right to receive one share of Common Stock. The RSUs are time-based, and will vest in full on the earlier of May 8, 2027 or the date of the Issuer's 2027 Annual Meeting of Shareholders.

Represents restricted stock units ("RSUs") granted to the Reporting Person under the Issuer's 2006 Equity and Cash Compensation Incentive Plan. Each RSU represents the right to receive one share of Common Stock. The RSUs are time-based, and will vest in full on the earlier of May 8, 2027 or the date of the Issuer's 2027 Annual Meeting of Shareholders.

Represents restricted stock units ("RSUs") granted to the Reporting Person under the Issuer's 2006 Equity and Cash Compensation Incentive Plan. Each RSU represents the right to receive one share of Common Stock. The RSUs are time-based, and will vest in full on the earlier of May 8, 2027 or the date of the Issuer's 2027 Annual Meeting of Shareholders.

Represents restricted stock units ("RSUs") granted to the Reporting Person under the Issuer's 2006 Equity and Cash Compensation Incentive Plan. Each RSU represents the right to receive one share of Common Stock. The RSUs are time-based, and will vest in full on the earlier of May 8, 2027 or the date of the Issuer's 2027 Annual Meeting of Shareholders.

Represents restricted stock units ("RSUs") granted to the Reporting Person under the Issuer's 2006 Equity and Cash Compensation Incentive Plan. Each RSU represents the right to receive one share of Common Stock. The RSUs are time-based, and will vest in full on the earlier of May 8, 2027 or the date of the Issuer's 2027 Annual Meeting of Shareholders.

The shares were sold pursuant to a sales plan adopted by the Reporting Person on February 6, 2026 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934.

Following an administrative correction to the number of shares withheld by the Issuer to satisfy the Reporting Person's tax withholding obligations in connection with the vesting of restricted stock units on April 1, 2026, as reported on a Form 4 filed on April 3, 2026, an additional 16 shares were sold on April 8, 2026 pursuant to a sales plan adopted by the Reporting Person on November 25, 2025 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934.

The shares were sold pursuant to a sales plan adopted by the Reporting Person on February 3, 2025 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934.

The shares were sold pursuant to a sales plan adopted by the Reporting Person on November 25, 2025 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934.

Shares withheld by the Issuer to satisfy the Reporting Person's tax withholding obligations in connection with the vesting of restricted stock units on April 1, 2026.