Teradyne (NASDAQ: TER) director sells 800 shares under 10b5-1 plan

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

She sold the shares at $338.98 per share. The Form 4 lists an open-market sale of 800 Teradyne common shares at this price on May 15, 2026, establishing the transaction’s per-share execution level.

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

Yes, the sale was executed under a Rule 10b5-1 trading plan. A footnote explains the transaction was effected pursuant to a sales plan adopted on February 13, 2026, intended to comply with Rule 10b5-1 under the Exchange Act.

Q: What type of transaction is reported in this Teradyne (TER) Form 4?

The filing reports an open-market sale of common stock. The transaction code is “S,” described as a sale in an open market or private transaction, involving 800 non-derivative shares of Teradyne common stock.

Filing Impact

(Moderate)

Filing Sentiment

(Negative)

Form Type

Rhea-AI Filing Summary

Teradyne director Marilyn Matz sold 800 shares of common stock at $338.98 per share in an open-market transaction. After this sale, she directly holds 19,040.675 shares. The trade was carried out under a pre-arranged Rule 10b5-1 sales plan adopted on February 13, 2026.

Insider Trade Summary 10b5-1

Net Seller: 800 shares ($271,184)

Net Sell 1 txn

Insider MATZ MARILYN

Role null

Sold 800 shs ($271K)

Type	Security	Shares	Price	Value
Sale	Common Stock	800	$338.98	$271K

Holdings After Transaction: Common Stock — 19,040.675 shares (Direct, null)

Footnotes (1)

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Key Figures

Shares sold: 800 shares Sale price per share: $338.98 per share Shares held after transaction: 19,040.675 shares +1 more

4 metrics

Shares sold 800 shares Open-market sale of Teradyne common stock

Sale price per share $338.98 per share Price for the 800-share open-market sale

Shares held after transaction 19,040.675 shares Director’s direct holdings following the sale

Net shares sold 800 shares Net sell direction in transaction summary

Key Terms

Rule 10b5-1, open-market sale, Common Stock, Form 4

4 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.

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.

Common Stock financial

"security_title: "Common Stock""

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

Form 4 regulatory

"INSIDER FILING DATA (Form 4)"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

Form 4 Insider Transactions: What Each Field Means →

05/19/2026 - 02:27 PM

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).

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)
05/15/2026

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	05/15/2026		S⁽¹⁾		800	D	$338.98	19,040.675	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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

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	05/19/2026
	** 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)

Source: View Original Filing on SEC EDGAR

FAQ

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

Marilyn Matz reported selling 800 shares of Teradyne common stock. The Form 4 shows an open-market sale of 800 shares at $338.98 per share, with her direct ownership reported at 19,040.675 shares after the transaction.

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

She sold the shares at $338.98 per share. The Form 4 lists an open-market sale of 800 Teradyne common shares at this price on May 15, 2026, establishing the transaction’s per-share execution level.

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

After the sale, Marilyn Matz directly holds 19,040.675 shares. The Form 4’s post-transaction ownership column reports this amount, reflecting her remaining direct position following the 800-share open-market sale.

What type of transaction is reported in this Teradyne (TER) Form 4?

The filing reports an open-market sale of common stock. The transaction code is “S,” described as a sale in an open market or private transaction, involving 800 non-derivative shares of Teradyne common stock.