Teradyne director Matz proposes $273K share sale

The notice also lists four earlier sales between July 15 and September 17, 2026, in its prior-three-month sales section.

Rhea-AI Filing Summary

Teradyne, Inc. director Marilyn Matz reported a proposed sale of 800 common shares through Fidelity Brokerage Services LLC, with an aggregate market value of $273,024.00 and a proposed sale date of October 15, 2026. The notice lists the shares as acquired through restricted-stock vesting: 44 shares on May 7, 2021, and 756 shares on May 9, 2024. It lists 156,340,750 shares outstanding.

Key Figures

Proposed shares for sale: 800 common shares Aggregate market value: $273,024.00 Shares outstanding: 156,340,750 shares +2 more

5 metrics

Proposed shares for sale 800 common shares Proposed sale dated October 15, 2026

Aggregate market value $273,024.00 Proposed sale

Shares outstanding 156,340,750 shares Listed in the securities information

Shares from May 7, 2021 restricted-stock vesting 44 shares Listed as acquired from the issuer

Shares from May 9, 2024 restricted-stock vesting 756 shares Listed as acquired from the issuer

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

"Restricted Stock Vesting"

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.

How many TER shares did Marilyn Matz propose to sell?

Marilyn Matz reported a proposed sale of 800 common shares, with an aggregate market value of $273,024.00, on October 15, 2026, through Fidelity Brokerage Services LLC.

What prior sales does Marilyn Matz report for TER?

The notice lists sales of 1,200 shares on July 15, 2026, for $427,572.00; 1,200 shares on August 17, 2026, for $510,000.00; 800 shares on September 15, 2026, for $270,264.00; and 400 shares on September 17, 2026, for $140,444.00.

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

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Available on EDGAR 10/15/2026 - 09:52 AM EDT Accepted by SEC EDGAR 10/15/2026 - 09:52 AM EDT 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	800	273024.00	156340750	10/15/2026	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			44	05/07/2021	Compensation
Common	05/09/2024	Restricted Stock Vesting	Issuer			756	05/09/2024	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
Marilyn Matz 600 Riverpark Drive North Reading MA 01864	Common	09/17/2026	400	140444.00

144: Remarks and Signature

Remarks
Date of Notice	10/15/2026
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)