Teradyne director plans $140K stock sale

Rhea-AI Filing Summary

TERADYNE, INC (TER) has a notice under Rule 144 indicating that director Marilyn Matz, through Fidelity Brokerage Services LLC, plans to sell 400 shares of Teradyne common stock on or about September 17, 2026, with an approximate aggregate market value of $140,444. These shares were acquired from Teradyne on May 7, 2021 via Restricted Stock Vesting as compensation.

Key Figures

Planned shares to be sold: 400 shares Aggregate market value of planned sale: $140,444 Shares sold July 15, 2026: 1,200 shares +5 more

8 metrics

Planned shares to be sold 400 shares Teradyne common stock under Rule 144 for the transaction dated September 17, 2026

Aggregate market value of planned sale $140,444 Estimated value for 400 Teradyne shares in the planned September 17, 2026 sale

Shares sold July 15, 2026 1,200 shares Teradyne common stock sold by Marilyn Matz on July 15, 2026

Proceeds July 15, 2026 sale $427,572 Value of 1,200 Teradyne shares sold on July 15, 2026

Shares sold August 17, 2026 1,200 shares Teradyne common stock sold by Marilyn Matz on August 17, 2026

Proceeds August 17, 2026 sale $510,000 Value of 1,200 Teradyne shares sold on August 17, 2026

Shares sold September 15, 2026 800 shares Teradyne common stock sold by Marilyn Matz on September 15, 2026

Proceeds September 15, 2026 sale $270,264 Value of 800 Teradyne shares sold on September 15, 2026

Key Terms

Rule 144, Restricted Stock Vesting, attorney-in-fact

3 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

Restricted Stock Vesting financial

"Common | 05/07/2021 | Restricted Stock Vesting | Issuer"

Restricted stock vesting is the timetable and conditions under which shares granted to employees or insiders become fully owned and can be sold, typically requiring continued work or meeting performance goals. It matters to investors because large blocks of shares can become tradable at once, which can change share supply and price, and because vesting aligns insiders’ incentives with the company’s long‑term performance—think of it like a timed unlock that both rewards and locks in key people.

attorney-in-fact regulatory

"as attorney-in-fact for Marilyn Matz"

An attorney-in-fact is the person or entity given legal authority through a power of attorney to act on behalf of another for specific tasks, such as signing documents, voting shares, or handling transactions. For investors, this matters because it lets a trusted representative make timely decisions or complete paperwork when the owner cannot, much like handing keys to someone to run errands on your behalf—so checks on scope and limits of that authority are important.

FAQ

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

What sale is disclosed for TERADYNE, INC (TER) in this Rule 144 notice?

The notice shows that director Marilyn Matz plans to sell 400 shares of Teradyne common stock, with an approximate aggregate market value of $140,444, in a transaction listed for September 17, 2026 on NASDAQ.

How and when did Marilyn Matz acquire the TER shares to be sold?

The 400 Teradyne shares to be sold were acquired on May 7, 2021 through Restricted Stock Vesting from the issuer as compensation.

What TER common stock sales has Marilyn Matz made in the past three months?

Disclosed past 3‑month sales are: 1,200 shares on July 15, 2026 for $427,572; 1,200 shares on August 17, 2026 for $510,000; and 800 shares on September 15, 2026 for $270,264.

Who is the broker for the planned TER share sale by Marilyn Matz?

The planned sale of Teradyne common stock is listed through Fidelity Brokerage Services LLC, located in Smithfield, Rhode Island.

Who signed the Rule 144 notice related to TER on behalf of Marilyn Matz?

The notice is signed by /s/ Daniel Tucci as a duly authorized representative of Fidelity Brokerage Services LLC, acting as attorney-in-fact for Marilyn Matz.

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

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Available on EDGAR 09/17/2026 - 11:46 AM Accepted by SEC EDGAR 09/17/2026 - 11:45 AM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001618274
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	TERADYNE, INC
SEC File Number	001-06462
Address of Issuer	600 RIVERPARK DRIVE NORTH READING MASSACHUSETTS 01864
Phone	978-370-2700
Name of Person for Whose Account the Securities are To Be Sold	MATZ MARILYN
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Director

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917	400	140444.00	156340750	09/17/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	05/07/2021	Restricted Stock Vesting	Issuer			400	05/07/2021	Compensation

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Marilyn Matz 600 Riverpark Drive North Reading MA 01864	Common	07/15/2026	1200	427572.00
Marilyn Matz 600 Riverpark Drive, North Reading MA 01864	Common	08/17/2026	1200	510000.00
Marilyn Matz 600 Riverpark Drive North Reading MA 01864	Common	09/15/2026	800	270264.00

144: Remarks and Signature

Remarks
Date of Notice	09/17/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	02/13/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Daniel Tucci, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Marilyn Matz
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)