Teradyne (NASDAQ: TER) director sells 400 shares under 10b5-1 plan

Rhea-AI Filing Summary

Teradyne, Inc. director Marilyn Matz reported an open-market sale of company common stock. On May 21, 2026, she sold 400 shares of Teradyne common stock at $350 per share. After this transaction, she directly holds 18,640.675 shares of common stock. The filing notes that this sale was executed under a pre-arranged sales plan adopted on February 13, 2026 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934.

Insider Trade Summary 10b5-1

Net Seller: 400 shares ($140,000)

Net Sell 1 txn

Insider MATZ MARILYN

Role null

Sold 400 shs ($140K)

Type	Security	Shares	Price	Value
Sale	Common Stock	400	$350.00	$140K

Holdings After Transaction: Common Stock — 18,640.675 shares (Direct, null)

Footnotes (1)

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Key Figures

Shares sold: 400 shares Sale price: $350 per share Shares held after sale: 18,640.675 shares +1 more

4 metrics

Shares sold 400 shares Open-market sale on May 21, 2026

Sale price $350 per share Common stock sale by director

Shares held after sale 18,640.675 shares Director’s direct ownership post-transaction

Net shares sold 400 shares Net buy/sell direction is net-sell

Key Terms

open-market sale, Rule 10b5-1, sales plan

3 terms

open-market sale financial

"transaction_action: open-market sale"

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

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 by the Reporting Person"

Form 4 Insider Transactions: What Each Field Means →

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)
05/21/2026

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	05/21/2026		S(1)		400	D	$350	18,640.675	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	05/26/2026
	** 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)

FAQ

What insider transaction did Teradyne (TER) director Marilyn Matz report?

Director Marilyn Matz reported selling 400 shares of Teradyne common stock. The sale occurred on May 21, 2026 at a price of $350 per share in an open-market transaction disclosed in a Form 4 filing.

At what price did Marilyn Matz sell her Teradyne (TER) shares?

She sold her Teradyne shares at $350 per share. The Form 4 shows a single open-market transaction on May 21, 2026, covering 400 shares of common stock at this reported sale price.

How many Teradyne (TER) shares does Marilyn Matz hold after the sale?

After the reported sale, Marilyn Matz directly holds 18,640.675 Teradyne shares. This post-transaction balance reflects her remaining direct ownership as disclosed in the Form 4 following the 400-share open-market sale.

Was Marilyn Matz’s Teradyne (TER) stock sale under a Rule 10b5-1 plan?

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

Does the Teradyne (TER) Form 4 show any option exercises or derivative trades?

No derivative transactions are reported in this Form 4 excerpt. The filing lists only one non-derivative open-market sale of 400 common shares, and the derivative summary section shows no remaining derivative positions in this specific disclosure.