Teradyne director sells $270K in company stock

A TERADYNE, INC director sold 800 shares under a pre-arranged Rule 10b5-1 trading plan and continues to hold over fourteen thousand shares.

Available on EDGAR 09/16/2026 - 12:20 PM EDT Accepted by SEC EDGAR 09/16/2026 - 12:19 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

TERADYNE, INC (TER) director Marilyn Matz reported selling 800 shares of common stock on September 15, 2026 at about $337.83 per share in an open-market or private transaction. The sale was made under a Rule 10b5-1 sales plan adopted on February 13, 2026, and she now holds 14,240.675 shares directly.

Insider Trade Summary 10b5-1

Net Seller: 800 shares

Net Sell 1 txn

Insider MATZ MARILYN

Role Director

Sold 800 shs ($270K)

Type	Security	Shares	Price	Value
Sale	Common Stock F1	800	$337.83	$270K

Holdings After Transaction: Common Stock — 14,240.675 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: 800 shares Sale price per share: $337.83 per share Approximate transaction value: $270,264 +2 more

5 metrics

Shares sold 800 shares Common stock sale reported for September 15, 2026

Sale price per share $337.83 per share Price for the 800 shares sold on September 15, 2026

Approximate transaction value $270,264 800 shares multiplied by the reported price of $337.83 per share

Shares held after transaction 14,240.675 shares Director’s direct holdings after the September 15, 2026 sale

Rule 10b5-1 plan adoption date February 13, 2026 Adoption date of the sales plan used for the reported transaction

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 (Teradyne, Inc) disclose in this Form 4?

TERADYNE, INC disclosed that director Marilyn Matz sold 800 shares of common stock on September 15, 2026 in an open-market or private transaction at about $337.83 per share, according to the Form 4 filing.

How many TER (Teradyne, Inc) shares did the director retain after the reported sale?

After the reported transaction, director Marilyn Matz directly holds 14,240.675 shares of TERADYNE, INC common stock. This figure reflects her direct ownership immediately following the sale of 800 shares reported in the Form 4.

Was the recent insider sale in TER (Teradyne, Inc) made under a Rule 10b5-1 plan?

Yes. The footnote states the sale was effected under a sales plan adopted on February 13, 2026 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934, indicating it was pre-arranged.

What was the approximate dollar value of the TER (Teradyne, Inc) shares sold by the director?

The director sold 800 shares at about $337.83 per share, for an approximate transaction value of $270,264. This value is the product of the reported share count and reported per-share price in the Form 4.

What is the role of the reporting person in TER (Teradyne, Inc)?

The reporting person, Marilyn Matz, is listed as a director of TERADYNE, INC. She is not indicated as an officer or ten percent owner in the Form 4.

How many TER (Teradyne, Inc) insider sales are reported in this Form 4 filing?

The Form 4 reports one insider transaction: a sale of 800 shares of TERADYNE, INC common stock by director Marilyn Matz on September 15, 2026.

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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)
09/15/2026

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	09/15/2026		S(1)		800	D	$337.83	14,240.675	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	09/16/2026
	** 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)