Teradyne director sells 400 shares at $351.11

Teradyne director Marilyn Matz sold a small block of shares under a pre-arranged Rule 10b5-1 trading plan and remains a direct shareholder.

Rhea-AI Filing Summary

TERADYNE, INC (TER) director Marilyn Matz reported selling 400 shares of common stock on September 17, 2026 in an open-market or private transaction at $351.11 per share. Following this sale, she directly holds 13,840.675 shares of TER common stock. The trade was made under a Rule 10b5-1 sales plan adopted on February 13, 2026.

Insider Trade Summary 10b5-1

Net Seller: 400 shares

Net Sell 1 txn

Insider MATZ MARILYN

Role Director

Sold 400 shs ($140K)

Type	Security	Shares	Price	Value
Sale	Common Stock F1	400	$351.11	$140K

Holdings After Transaction: Common Stock — 13,840.675 shares (Direct)

Footnotes (1)

1. F1. 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.

Key Figures

Shares sold: 400 shares Sale price per share: $351.11 per share Shares held after transaction: 13,840.675 shares +1 more

4 metrics

Shares sold 400 shares Common stock sale reported for September 17, 2026

Sale price per share $351.11 per share Price for the 400 shares of common stock sold

Shares held after transaction 13,840.675 shares Direct ownership of Teradyne common stock following the sale

Rule 10b5-1 plan adoption date February 13, 2026 Sales plan under which the reported transaction was effected

Key Terms

Rule 10b5-1, sales plan, open market or private transaction

3 terms

Rule 10b5-1 regulatory

"intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934"

Rule 10b5-1 is a regulation that allows company insiders to buy or sell their shares at predetermined times, even if they have access to non-public information. It acts like setting a schedule in advance for transactions, helping prevent accusations of unfair trading. This rule provides a way for insiders to plan trades transparently, giving investors confidence that these transactions are not based on hidden information.

sales plan financial

"The reported transaction was effected pursuant to a sales plan adopted"

open market or private transaction financial

"Sale in open market or private transaction"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did TER director Marilyn Matz report?

She reported a sale of 400 shares of Teradyne common stock on September 17, 2026 at $351.11 per share in an open-market or private transaction.

How many TER shares does Marilyn Matz hold after this transaction?

After the reported sale, Marilyn Matz directly holds 13,840.675 shares of Teradyne common stock, according to the Form 4 disclosure.

Was the TER insider sale by Marilyn Matz under a Rule 10b5-1 plan?

Yes. The filing states the sale was effected pursuant to a sales plan adopted on February 13, 2026 that is intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934.

What price did Marilyn Matz receive for the TER shares sold?

The reported transaction price was $351.11 per share for the 400 shares of Teradyne common stock sold on September 17, 2026.

What role does Marilyn Matz have at TERADYNE, INC (TER)?

Marilyn Matz is reported in the filing as a director of TERADYNE, INC, with no officer or ten percent owner status indicated.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 09/18/2026 - 11:38 AM Accepted by SEC EDGAR 09/18/2026 - 11:38 AM Learn about SEC filing dates

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

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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

X

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

MATZ MARILYN

(Last) (First) (Middle)

C/O TERADYNE, INC.

600 RIVERPARK DRIVE

(Street)

NORTH READING MASSACHUSETTS 01864

(City) (State) (Zip)

UNITED STATES

(Country)

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)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/17/2026

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

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

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

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	09/17/2026		S(1)		400	D	$351.11	13,840.675	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. 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.

	/s/ Ryan E. Driscoll, Attorney-in-Fact	09/18/2026
	** 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.
* Form 4: SEC 1474 (03-26)