Willdan Group (WLDN) CEO logs tax withholding of 1,814 shares

Rhea-AI Filing Summary

Willdan Group, Inc. reported a routine tax-related share withholding by its President and CEO, Michael A. Bieber. On March 9, 2026, 1,814 shares of common stock were withheld at $82.98 per share to cover taxes on recently vested restricted stock. Following this non-market transaction, he directly holds 223,882 shares of Willdan common stock.

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	1,814	$82.98	$151K

Holdings After Transaction: Common Stock — 223,882 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 on March 7, 2026, which restricted stock was granted on March 7, 2023. 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) 19,250 shares of restricted stock units that vest in three substantially equal installments on each of March 17, 2026, 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.

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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 CA 92806

(City) (State) (Zip)

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

3. Date of Earliest Transaction (Month/Day/Year)
03/09/2026

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	03/09/2026		F		1,814(1)	D	$82.98	223,882(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 on March 7, 2026, which restricted stock was granted on March 7, 2023.

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) 19,250 shares of restricted stock units that vest in three substantially equal installments on each of March 17, 2026, 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	03/11/2026
	** 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.

FAQ

What insider transaction did Willdan Group (WLDN) report for its CEO?

Willdan Group reported a tax-related share withholding for CEO Michael A. Bieber. On March 9, 2026, 1,814 common shares were withheld at $82.98 each to satisfy tax obligations arising from restricted stock vesting, rather than an open-market sale.

Was the Willdan (WLDN) CEO’s Form 4 transaction an open-market sale?

No, the transaction was not an open-market sale. The 1,814 shares were withheld by the company to cover tax withholding obligations tied to restricted stock that vested on March 7, 2026, which had been granted on March 7, 2023.

How many Willdan (WLDN) shares does the CEO hold after this Form 4?

After the tax withholding transaction, CEO Michael A. Bieber holds 223,882 shares of Willdan common stock directly. This figure reflects his position following the 1,814-share withholding to satisfy tax obligations on vested restricted stock units.

What restricted stock units are outstanding for the Willdan (WLDN) CEO?

Outstanding awards include 18,000 RSUs vesting in three installments on March 3, 2027, 2028 and 2029; 19,250 RSUs vesting on March 17, 2026, 2027 and 2028; and 11,667 RSUs vesting on March 20, 2026 and 2027, subject to continued service.

What triggered the tax withholding reported in Willdan (WLDN) CEO’s Form 4?

The withholding was triggered by the vesting of restricted stock on March 7, 2026. Shares were automatically withheld to satisfy tax obligations associated with this vesting, using previously granted restricted stock awarded on March 7, 2023.