[Form 4] TERADYNE, INC Insider Trading Activity

Rhea-AI Filing Summary

Peter Herweck, a director of Teradyne, Inc. (TER), deferred his quarterly cash compensation into 206 deferred stock units (DSUs) on 09/25/2025. The filing shows the 206 DSUs were issued at a $0 price per unit (per reporting convention) and that after this transaction the reporting person beneficially owned 15,205 shares of Teradyne common stock. The DSUs are calculated based on the closing price on the issuance date and will be settled one-for-one in common stock generally within ninety days after the director ceases to serve as a non-employee director. The Form 4 was signed by an attorney-in-fact on 09/29/2025.

Positive

• Director increased equity alignment by deferring cash compensation into 206 DSUs
• Total beneficial ownership disclosed at 15,205 shares provides transparency for investors

Negative

• None.

Insights

Corporate Governance Expert

TL;DR: Routine director deferral into DSUs indicates alignment with shareholder interests and standard non-employee director compensation practice.

This Form 4 reports a director-level compensation deferral rather than a market purchase or sale. Converting cash retainer into 206 DSUs is a common governance practice to align non-employee directors with long-term equity ownership. The filing discloses the mechanics: DSUs are priced using the closing stock price at issuance and convert one-for-one to common stock within ninety days after the director leaves the board. There is no indication of option exercises, sales, or derivative transactions in this filing, and the overall beneficial ownership reported is 15,205 shares.

Securities Analyst

TL;DR: Transaction is immaterial to company capitalization but notable for tracking director ownership levels.

The reported acquisition of 206 DSUs on 09/25/2025 increases the reporting person's stake to 15,205 shares. Because this is a compensation deferral settled in DSUs, it does not reflect open-market trading and carries no immediate cash transfer related to share purchase. The Form 4 contains no derivatives, dispositions, or other transactions that would materially affect float or signal large insider liquidity events. Impact on valuation or market supply is therefore negligible based on the disclosed data.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person^*

Herweck Peter

(Last) (First) (Middle)

TERADYNE, INC.

600 RIVERPARK DRIVE

(Street)

NORTH READING MA 01864

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
TERADYNE, INC [ TER ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
09/25/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	09/25/2025		A		206(1)	A	$0(1)	15,205	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. 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.

	/s/ Ryan E. Driscoll, Attorney-in-Fact	09/29/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What did the TER Form 4 filed for Peter Herweck report?

The filing reports that on 09/25/2025 Mr. Herweck deferred his quarterly cash compensation into 206 deferred stock units (DSUs), bringing his beneficial ownership to 15,205 shares.

How are the DSUs described in the TER Form 4 settled?

The DSUs are calculated using the closing price on the issuance date and are settled one-for-one in common stock generally within ninety days after the director no longer serves as a non-employee director.

Does the Form 4 show any sales or derivative transactions for TER?

No. The Form 4 shows an acquisition via DSU deferral and does not report open-market purchases, sales, or derivative transactions in this filing.

When was the Form 4 signed and filed?

The signature block shows the Form 4 was signed by an attorney-in-fact on 09/29/2025.

Is the DSU issuance priced in the Form 4?

The Form 4 lists the transaction price as $0 per reporting convention and explains DSUs are valued based on the closing stock price on the issuance date.