Teradyne director Mercedes Johnson sells 167 shares

The Mercedes Johnson Trust held shares with Johnson identified as its trustee and sole beneficiary.

Rhea-AI Filing Summary

Teradyne, Inc. director Mercedes Johnson sold 167 shares of common stock on October 1, 2026, at $402.90 per share under a sales plan adopted March 4, 2026, which was intended to comply with Rule 10b5-1. After the sale, Johnson directly held 6,197 shares, while The Mercedes Johnson Trust held 1,876 shares.

Insider Trade Summary 10b5-1

Net Seller: 167 shares

Net Sell 2 txns

Insider JOHNSON MERCEDES

Role Director

Sold 167 shs ($67K)

Type	Security	Shares	Price	Value
Sale	Common Stock F1	167	$402.90	$67K
holding	Common Stock F2	--	--	--

Holdings After Transaction: Common Stock — 6,197 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: $402.90 per share Direct shares following sale: 6,197 shares +1 more

4 metrics

Shares sold 167 shares October 1, 2026

Sale price per share $402.90 per share Sale on October 1, 2026

Direct shares following sale 6,197 shares Following the October 1, 2026 sale

Trust-held shares 1,876 shares Reported October 1, 2026

Key Terms

Rule 10b5-1, sales plan, trustee, sole beneficiary

4 terms

Rule 10b5-1 regulatory

"the sales plan intended to comply with Rule 10b5-1"

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

"shares were sold pursuant to a sales plan"

trustee technical

"the Reporting Person is the trustee"

A trustee is a person or institution legally appointed to hold and manage assets or enforce an agreement on behalf of other people (beneficiaries). Think of a trustee as a neutral referee or custodian who must act in the beneficiaries’ best interests, follow the trust or contract rules, and handle distributions, recordkeeping and enforcement. Investors care because a trustworthy trustee protects their rights, ensures promised payments or remedies are delivered, and can influence recoveries if things go wrong.

sole beneficiary technical

"the trustee and sole beneficiary"

FAQ

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

How many TER shares did director Mercedes Johnson sell, and at what price?

Mercedes Johnson sold 167 TER common shares on October 1, 2026, at $402.90 per share. The sale was made under a plan adopted March 4, 2026, intended to comply with Rule 10b5-1.

How many TER shares did Mercedes Johnson hold after the sale?

After the October 1, 2026 sale, Johnson directly held 6,197 shares. The Mercedes Johnson Trust held 1,876 shares; Johnson was the trust's trustee and sole beneficiary.

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

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Available on EDGAR 10/02/2026 - 12:45 PM Accepted by SEC EDGAR 10/02/2026 - 12:44 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)
10/01/2026

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	10/01/2026		S(1)		167	D	$402.9	6,197	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	10/02/2026
	** 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)