Willdan Group (WLDN) CEO uses 2,625 shares to cover RSU tax bill

Rhea-AI Filing Summary

Willdan Group president and CEO Michael A. Bieber reported a routine tax-related transaction involving company stock. On March 17, 2026, 2,625 shares of common stock were withheld at $78.29 per share to satisfy tax obligations from vesting restricted stock units.

After this withholding, Bieber directly held 242,606 shares of common stock. He also has unvested restricted stock units, including 18,000 units vesting in three installments on March 3, 2027, 2028 and 2029, 12,834 units vesting in two installments on March 17, 2027 and 2028, and 11,667 units vesting in two installments on March 20, 2026 and 2027, all subject to continued service.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider BIEBER MICHAEL A

Role PRESIDENT AND CEO

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock	2,625	$78.29	$206K

Holdings After Transaction: Common Stock — 242,606 shares (Direct)

Footnotes (1)

1. Represents shares of the Issuer's Common Stock withheld to satisfy tax withholding obligations in connection with the vesting of restricted stock units on March 17, 2026, which restricted stock was granted on March 17, 2025. Includes (i) 18,000 shares of restricted stock units that vest in three substantially equal installments on each of March 3, 2027, March 3, 2028 and March 3, 2029, (ii) 12,834 shares of restricted stock units that vest in two substantially equal installments on each of March 17, 2027 and March 17, 2028, and (iii) 11,667 shares of restricted stock units that vest in two substantially equal installments on each of March 20, 2026 and March 20, 2027, subject to the Reporting Person's continued service to the Issuer through the applicable vesting date.

Form 4 Insider Transactions: What Each Field Means →

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^*

BIEBER MICHAEL A

(Last) (First) (Middle)

2401 EAST KATELLA AVENUE

SUITE 300

(Street)

ANAHEIM CALIFORNIA 92806

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Willdan Group, Inc. [ WLDN ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	PRESIDENT AND CEO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
03/17/2026

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	03/17/2026		F		2,625(1)	D	$78.29	242,606(2)	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 shares of the Issuer's Common Stock withheld to satisfy tax withholding obligations in connection with the vesting of restricted stock units on March 17, 2026, which restricted stock was granted on March 17, 2025.

2. Includes (i) 18,000 shares of restricted stock units that vest in three substantially equal installments on each of March 3, 2027, March 3, 2028 and March 3, 2029, (ii) 12,834 shares of restricted stock units that vest in two substantially equal installments on each of March 17, 2027 and March 17, 2028, and (iii) 11,667 shares of restricted stock units that vest in two substantially equal installments on each of March 20, 2026 and March 20, 2027, subject to the Reporting Person's continued service to the Issuer through the applicable vesting date.

	/s/ Creighton K. Early, Attorney-in-fact for Michael A. Bieber	03/19/2026
	** 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)

FAQ

What did Willdan Group (WLDN) CEO Michael Bieber report in this Form 4?

Michael Bieber reported a tax-related share disposition. The company withheld 2,625 common shares to cover tax obligations from vesting restricted stock units, a routine non-market transaction that does not represent an open-market purchase or sale of Willdan Group stock.

How many Willdan Group (WLDN) shares were used to cover Michael Bieber’s taxes?

A total of 2,625 Willdan Group common shares were withheld. These shares satisfied tax withholding obligations triggered when previously granted restricted stock units vested on March 17, 2026, rather than being sold in the open market by the CEO.

At what price were the withheld Willdan Group (WLDN) shares valued?

The withheld shares were valued at $78.29 per share. This price is used in the Form 4 to quantify the tax-withholding disposition, reflecting the fair market value applied when the restricted stock units vested and shares were retained by the company.

How many Willdan Group (WLDN) shares does Michael Bieber hold after this transaction?

Following the tax-withholding transaction, Michael Bieber directly holds 242,606 common shares. This figure reflects his remaining ownership after 2,625 shares were withheld to cover tax obligations arising from the vesting of restricted stock units on March 17, 2026.

What unvested restricted stock units does the Willdan Group (WLDN) CEO still have?

Michael Bieber holds 18,000 restricted stock units vesting in three installments on March 3, 2027, 2028 and 2029; 12,834 units vesting in two installments on March 17, 2027 and 2028; and 11,667 units vesting in two installments on March 20, 2026 and 2027, subject to continued service.

Does this Willdan Group (WLDN) Form 4 indicate an open-market sale by the CEO?

No, it does not indicate an open-market sale. The Form 4 shows a tax-withholding disposition coded “F,” meaning shares were withheld by the issuer to satisfy tax liabilities from vesting restricted stock units, rather than sold by Michael Bieber in the market.