[Form 4] TERADYNE, INC Insider Trading Activity

Rhea-AI Filing Summary

Teradyne director Mercedes Johnson reported a small open-market sale of company stock. She sold 167 shares of Common Stock at a price of $460.00 per share in a transaction classified as an open-market sale. The sale was executed under a pre-arranged Rule 10b5-1 trading plan adopted on March 4, 2026, indicating it was scheduled in advance. After the sale, she directly holds 6,697 shares and indirectly holds 1,876 shares through The Mercedes Johnson Trust, where she is trustee and sole beneficiary.

Insider Trade Summary 10b5-1

Net Seller: 167 shares ($76,820)

Net Sell 2 txns

Insider JOHNSON MERCEDES

Role null

Sold 167 shs ($77K)

Type	Security	Shares	Price	Value
Sale	Common Stock	167	$460.00	$77K
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 6,697 shares (Direct, null); Common Stock — 1,876 shares (Indirect, By Trust)

Footnotes (1)

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. 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: $460.00 per share Direct holdings after sale: 6,697 shares +2 more

5 metrics

Shares sold 167 shares Open-market sale of Common Stock on July 1, 2026

Sale price $460.00 per share Price for the 167 Teradyne shares sold

Direct holdings after sale 6,697 shares Common Stock directly owned by Mercedes Johnson post-transaction

Indirect holdings after sale 1,876 shares Common Stock held via The Mercedes Johnson Trust

Net shares sold 167 shares Net change in buy/sell activity reported in this Form 4

Key Terms

Rule 10b5-1, open-market sale, Common Stock, Trust, +1 more

5 terms

Rule 10b5-1 regulatory

"sales plan adopted by the Reporting Person ... 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.

open-market sale financial

"transaction_action": "open-market sale""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

Common Stock financial

""security_title": "Common Stock""

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

Trust financial

"Shares held by The Mercedes Johnson Trust UAD 07/23/04"

A trust is a legal setup in which one party (the trustee) holds and manages assets—like cash, stocks or property—on behalf of other people (beneficiaries) according to instructions from the person who created it (the grantor). Think of it as a locked box with a keyholder who must follow written rules; for investors it matters because trusts influence who controls and benefits from assets, affect taxes and succession, and can change how quickly or transparently shares are bought, sold or voted.

Form 4 regulatory

"INSIDER FILING DATA (Form 4):"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 07/02/2026 - 01:11 PM Accepted by SEC EDGAR 07/02/2026 - 01:11 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)
07/01/2026

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	07/01/2026		S(1)		167	D	$460	6,697	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	07/02/2026
	** 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)