Teradyne director sells 167 shares at $341

Teradyne director Mercedes Johnson sold shares under a pre-established Rule 10b5-1 plan and reported updated direct and trust holdings.

Rhea-AI Filing Summary

TERADYNE, INC (TER) director Mercedes Johnson reported selling common stock and updating her holdings. On September 1, 2026, she sold 167 shares of common stock at $341.30 per share in an open-market or private transaction pursuant to a Rule 10b5-1 trading plan adopted on March 4, 2026. After this sale, she held 6,364 shares directly and 1,876 shares indirectly through The Mercedes Johnson Trust UAD 07/23/04, where she is trustee and sole beneficiary.

Insider Trade Summary 10b5-1

Net Seller: 167 shares

Net Sell 2 txns

Insider JOHNSON MERCEDES

Role Director

Sold 167 shs ($57K)

Type	Security	Shares	Price	Value
Sale	Common Stock F1	167	$341.30	$57K
holding	Common Stock F2	--	--	--

Holdings After Transaction: Common Stock — 6,364 shares (Direct); Common Stock — 1,876 shares (Indirect, By Trust)

Footnotes (2)

1. F1. The shares were sold pursuant to a sales plan adopted by the Reporting Person on March 4, 2026 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934.
2. F2. Shares held by The Mercedes Johnson Trust UAD 07/23/04 (the "Trust"), of which the Reporting Person is the trustee and sole beneficiary.

Key Figures

Shares sold: 167 shares Sale price per share: $341.30 per share Direct holdings after transaction: 6,364 shares +3 more

6 metrics

Shares sold 167 shares Common stock sale reported for September 1, 2026

Sale price per share $341.30 per share Price for the 167 shares of common stock sold on September 1, 2026

Direct holdings after transaction 6,364 shares Directly owned Teradyne common stock following the September 1, 2026 sale

Indirect holdings after transaction 1,876 shares Indirectly owned through The Mercedes Johnson Trust UAD 07/23/04 after the reported transaction

Shares sold under 10b5-1 plan 167 shares Sold pursuant to a sales plan adopted March 4, 2026 to comply with Rule 10b5-1

Trading plan adoption date March 4, 2026 Date the Rule 10b5-1 sales plan referenced in the footnote was adopted

Key Terms

Rule 10b5-1, sales plan, sole beneficiary, indirectly owned

4 terms

Rule 10b5-1 regulatory

"intended to comply with Rule 10b5-1 under the Securities Exchange Act"

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 shares were sold pursuant to a sales plan adopted by the Reporting Person"

sole beneficiary financial

"of which the Reporting Person is the trustee and sole beneficiary"

indirectly owned financial

"Shares held by The Mercedes Johnson Trust ... reported as indirectly owned"

FAQ

What insider transaction did TER director Mercedes Johnson report?

Director Mercedes Johnson reported a sale of 167 shares of Teradyne common stock on September 1, 2026, described as a sale in an open-market or private transaction. The filing also updates her direct and indirect share holdings.

At what price did Mercedes Johnson sell TER common stock?

Mercedes Johnson sold 167 shares of Teradyne common stock at a reported price of $341.30 per share on September 1, 2026, as disclosed in the Form 4 insider transaction report.

How many TER shares does Mercedes Johnson hold after this transaction?

After the September 1, 2026 sale, Mercedes Johnson held 6,364 shares directly of Teradyne common stock and 1,876 shares indirectly through The Mercedes Johnson Trust UAD 07/23/04.

Was Mercedes Johnson’s sale of TER shares under a Rule 10b5-1 plan?

Yes. The filing states the 167-share sale was made pursuant to a sales plan adopted on March 4, 2026 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934.

How are the trust-held TER shares related to Mercedes Johnson?

The 1,876 indirect shares are held by The Mercedes Johnson Trust UAD 07/23/04. The filing notes that Mercedes Johnson is the trustee and sole beneficiary of this trust, so these shares are reported as indirectly owned.

How many TER shares did Mercedes Johnson sell in total in this Form 4?

In this Form 4, Mercedes Johnson reported the sale of 167 shares of Teradyne common stock. The transaction summary in the filing shows a net sell direction with 167 shares sold and no reported purchases.

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Available on EDGAR 09/02/2026 - 02:29 PM Accepted by SEC EDGAR 09/02/2026 - 02:28 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^*

JOHNSON MERCEDES

(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)
09/01/2026

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	09/01/2026		S(1)		167	D	$341.3	6,364	D
Common Stock								1,876	I	By Trust(2)

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 shares were sold pursuant to a sales plan adopted by the Reporting Person on March 4, 2026 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934.

2. Shares held by The Mercedes Johnson Trust UAD 07/23/04 (the "Trust"), of which the Reporting Person is the trustee and sole beneficiary.

	/s/ Ryan E. Driscoll, Attorney-in-Fact	09/02/2026
	** 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)