Teradyne director granted 668 restricted stock units

MADDOCK ERNEST E reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

MADDOCK ERNEST E reported acquisition or exercise transactions in this Form 4 filing.

TERADYNE, INC director Ernest E. Maddock reported a compensation-related stock award. He received 668 restricted stock units (RSUs) of Common Stock under the company’s 2006 Equity and Cash Compensation Incentive Plan, with no purchase price.

Each RSU represents one share of Teradyne common stock. The RSUs are time-based and will vest in full on the earlier of May 8, 2027 or the date of Teradyne’s 2027 Annual Meeting of Shareholders. Following this grant, Maddock directly holds 10,265 shares of common stock.

Insider Trade Summary

Grant/Award: 668 shares

Grant/Award 1 txn

Insider MADDOCK ERNEST E

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	668	$0.00	$0.00

Holdings After Transaction: Common Stock — 10,265 shares (Direct)

Footnotes (1)

1. F1. Represents restricted stock units ("RSUs") granted to the Reporting Person under the Issuer's 2006 Equity and Cash Compensation Incentive Plan. Each RSU represents the right to receive one share of Common Stock. The RSUs are time-based, and will vest in full on the earlier of May 8, 2027 or the date of the Issuer's 2027 Annual Meeting of Shareholders.

Key Figures

RSU grant size: 668 RSUs Post-transaction holdings: 10,265 shares Vesting date: May 8, 2027

3 metrics

RSU grant size 668 RSUs Restricted stock units granted on May 8, 2026

Post-transaction holdings 10,265 shares Total common shares held directly after award

Vesting date May 8, 2027 RSUs vest on earlier of this date or 2027 annual meeting

Key Terms

restricted stock units ("RSUs"), 2006 Equity and Cash Compensation Incentive Plan, Annual Meeting of Shareholders

3 terms

restricted stock units ("RSUs") financial

"Represents restricted stock units ("RSUs") granted to the Reporting Person under the Issuer's 2006 Equity and Cash Compensation Incentive Plan."

Restricted stock units (RSUs) are a company promise to give an employee shares of stock (or cash equivalent) in the future, but only after certain conditions—usually staying with the company for a set time or hitting performance goals—are met. Investors watch RSUs because when they vest they increase the number of shares outstanding and can lead insiders to sell shares, affecting share price, company dilution and the true cost of employee pay.

2006 Equity and Cash Compensation Incentive Plan financial

"granted to the Reporting Person under the Issuer's 2006 Equity and Cash Compensation Incentive Plan."

Annual Meeting of Shareholders financial

"will vest in full on the earlier of May 8, 2027 or the date of the Issuer's 2027 Annual Meeting of Shareholders."

A yearly gathering where a company’s owners (shareholders) vote on key items like electing the board, approving executive pay, and ratifying auditors, and receive updates on performance and strategy. Think of it as an annual town hall for owners: it matters to investors because outcomes and disclosures can affect leadership, corporate direction, dividend and governance policies, and therefore the company’s risk and potential return.

FAQ

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

What insider transaction did TER director Ernest Maddock report on this Form 4?

Director Ernest E. Maddock reported receiving 668 restricted stock units (RSUs) of Teradyne common stock as a compensation award, with no cash paid. This is a non-market grant, not an open-market purchase or sale.

How many Teradyne (TER) shares does Ernest Maddock hold after this award?

After the RSU grant, Ernest Maddock directly holds 10,265 shares of Teradyne common stock. This total reflects the addition of 668 time-based RSUs granted under the company’s 2006 Equity and Cash Compensation Incentive Plan.

When do Ernest Maddock’s 668 Teradyne RSUs vest?

The 668 RSUs will vest in full on the earlier of May 8, 2027 or the date of Teradyne’s 2027 Annual Meeting of Shareholders. Vesting must occur before the RSUs convert into actual common shares.

What does each restricted stock unit (RSU) for Teradyne (TER) represent?

Each Teradyne RSU represents the right to receive one share of Teradyne common stock upon vesting. Holders do not receive the underlying shares until the time-based vesting condition is satisfied.

Under which plan were the 668 Teradyne RSUs granted to Ernest Maddock?

The 668 RSUs were granted under Teradyne’s 2006 Equity and Cash Compensation Incentive Plan. This plan provides equity-based compensation such as restricted stock units to directors and other eligible participants.

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

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Accepted by SEC EDGAR 05/12/2026 - 05:09 PM EDT 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).

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^*

MADDOCK ERNEST E

(Last) (First) (Middle)

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)
05/08/2026

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	05/08/2026		A		668(1)	A	$0	10,265	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. Represents restricted stock units ("RSUs") granted to the Reporting Person under the Issuer's 2006 Equity and Cash Compensation Incentive Plan. Each RSU represents the right to receive one share of Common Stock. The RSUs are time-based, and will vest in full on the earlier of May 8, 2027 or the date of the Issuer's 2027 Annual Meeting of Shareholders.

	/s/ Ryan E. Driscoll, Attorney-in-Fact	05/12/2026
	** 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)