Teradyne CEO sells 4,000 shares at $337.83

Teradyne’s president and CEO sold 4,000 shares under a pre-arranged Rule 10b5-1 trading plan and retains over 108,000 shares directly.

Rhea-AI Filing Summary

TERADYNE, INC (TER) President and CEO Gregory Stephen Smith sold 4,000 shares of common stock on September 15, 2026 at an average price of $337.83 per share. Following this sale, he holds 108,495.4075 shares directly. The transaction was carried out under a Rule 10b5-1 trading plan adopted on February 12, 2026.

Insider Trade Summary 10b5-1

Net Seller: 4,000 shares

Net Sell 1 txn

Insider Smith Gregory Stephen

Role President and CEO

Sold 4,000 shs ($1.35M)

Type	Security	Shares	Price	Value
Sale	Common Stock F1	4,000	$337.83	$1.35M

Holdings After Transaction: Common Stock — 108,495.4075 shares (Direct)

Footnotes (1)

1. F1. The reported transactions were effected pursuant to a sales plan adopted by the Reporting Person on February 12, 2026 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934.

Key Figures

Shares sold: 4,000 shares Sale price: $337.83 per share Shares held after transaction: 108,495.4075 shares +1 more

4 metrics

Shares sold 4,000 shares Sale of common stock by the president and CEO on September 15, 2026

Sale price $337.83 per share Average price received for 4,000 shares sold on September 15, 2026

Shares held after transaction 108,495.4075 shares Direct holdings of the president and CEO following the reported sale

Rule 10b5-1 plan adoption date February 12, 2026 Date the trading plan governing the reported sale was adopted

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 transactions were 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’s CEO report on this Form 4?

Gregory Stephen Smith, president and CEO of TERADYNE, INC (TER), reported selling 4,000 shares of common stock on September 15, 2026 at an average price of $337.83 per share in an open market or private transaction.

How many TER shares does the CEO hold after the reported sale?

After the September 15, 2026 sale, Gregory Stephen Smith directly holds 108,495.4075 shares of Teradyne common stock. This figure reflects his reported direct ownership position immediately following the transaction.

Was the TER CEO’s September 2026 stock sale under a Rule 10b5-1 plan?

Yes. The filing states the reported transactions were effected under a sales plan adopted on February 12, 2026 that is intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934.

What price did the TER CEO receive for the sold shares?

Gregory Stephen Smith sold 4,000 shares of Teradyne common stock at an average price of $337.83 per share on September 15, 2026, in an open market or private transaction as described in the filing.

What is the nature of the CEO’s ownership of TER shares after the sale?

The filing reports that the 108,495.4075 shares held after the transaction are owned directly by Gregory Stephen Smith, reflecting his direct beneficial ownership following the September 15, 2026 sale.

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

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Available on EDGAR 09/16/2026 - 12:23 PM Accepted by SEC EDGAR 09/16/2026 - 12:23 PM Learn about SEC filing dates

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^*

Smith Gregory Stephen

(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
X	Officer (give title below)		Other (specify below)
	President and CEO

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)		4,000	D	$337.83	108,495.4075	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 transactions were effected pursuant to a sales plan adopted by the Reporting Person on February 12, 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)