Teradyne director receives 2 deferred stock units

Teradyne, Inc. director Ernest E. Maddock recorded a small, routine equity-related change in his holdings.

Rhea-AI Filing Summary

Teradyne, Inc. director Ernest E. Maddock recorded a small, routine equity-related change in his holdings. On March 13, 2026, he received 2 deferred stock units (DSUs) credited as dividends on existing DSUs, in lieu of cash. This transaction is classified as an exempt "other" acquisition under Exchange Act Rule 16b-3(d). Following this adjustment, he is credited with a total of 9,597 units tied to Teradyne common stock, which will generally be settled one-for-one in shares within ninety days after he no longer serves as a non-employee director.

Insider Trade Summary

Other: 2 shares

Other 1 txn

Insider MADDOCK ERNEST E

Role Director

Type	Security	Shares	Price	Value
Other	Common Stock	2	$0.00	$0.00

Holdings After Transaction: Common Stock — 9,597 shares (Direct)

Footnotes (1)

1. F1. Represents deferred stock units ("DSUs") issued to the Reporting Person in accordance with his election to receive dividends paid on DSUs in the form of additional DSUs in lieu of cash. Such acquisition is exempt under Exchange Act Rule 16b-3(d). DSUs are settled one-for-one in Common Stock generally within ninety days of the date as of which a non-employee director no longer serves in such capacity.

FAQ

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

What insider transaction did Teradyne (TER) director Ernest Maddock report?

Director Ernest E. Maddock reported receiving 2 deferred stock units. These units were issued as dividend equivalents on existing DSUs, in lieu of cash, and are classified as an exempt “other” acquisition under Exchange Act Rule 16b-3(d).

How many Teradyne (TER) units does Ernest Maddock hold after this Form 4?

After this transaction, Ernest E. Maddock is credited with 9,597 units tied to Teradyne common stock. These are deferred stock units that will generally be settled one-for-one in shares after he stops serving as a non-employee director.

What are deferred stock units (DSUs) in the Teradyne (TER) filing?

Deferred stock units are bookkeeping entries that track the value of common stock without immediate share issuance. For Teradyne directors, DSUs are settled one-for-one in common shares, generally within ninety days after they cease serving as non-employee directors.

Why did Teradyne (TER) issue 2 DSUs instead of cash to its director?

The 2 deferred stock units were issued because the director elected to receive dividends on existing DSUs in the form of additional DSUs rather than cash. This reflects a compensation election rather than an open-market stock purchase or sale.

Is the Teradyne (TER) director’s Form 4 transaction a buy or sell of stock?

The reported event is not a traditional buy or sell. It is classified as an “other” exempt acquisition of 2 deferred stock units, issued as dividend equivalents on existing DSUs, under Exchange Act Rule 16b-3(d). No open-market trade occurred.

When will Teradyne (TER) deferred stock units held by the director be settled?

The deferred stock units will generally be settled one-for-one in Teradyne common stock within ninety days after the non-employee director no longer serves in that capacity. Until then, they remain as units credited to the director’s account.

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

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Accepted by SEC EDGAR 03/17/2026 - 05:29 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).

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 MA 01864

(City) (State) (Zip)

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)

3. Date of Earliest Transaction (Month/Day/Year)
03/13/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

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	03/13/2026		J(1)		2(1)	A	$0(1)	9,597	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 deferred stock units ("DSUs") issued to the Reporting Person in accordance with his election to receive dividends paid on DSUs in the form of additional DSUs in lieu of cash. Such acquisition is exempt under Exchange Act Rule 16b-3(d). DSUs are settled one-for-one in Common Stock generally within ninety days of the date as of which a non-employee director no longer serves in such capacity.

	/s/ Ryan E. Driscoll, Attorney-in-Fact	03/17/2026
	** 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.