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Willdan director sells 4,905 shares after option

A Willdan Group director exercised stock options and sold the resulting 4,905 shares in the market.

(Neutral)
(Neutral)
Form Type
4

Rhea-AI Filing Summary

Willdan Group, Inc. (WLDN) director Thomas Donald Brisbin exercised stock options for 4,905 shares of common stock on September 15, 2026 at an exercise price of $16.27 per share. He then sold 4,905 shares of common stock in open-market transactions the same day and held 22,635 options afterward. No Rule 10b5-1 trading plan is reported.

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Insider Brisbin Thomas Donald
Role Director
Sold 4,905 shs ($389K)
Approx. gross sale proceeds $389K
Approx. exercise cost $80K
Approx. pre-tax spread $309K
Type Security Shares Price Value
Exercise Stock Options (Right to Buy) F4 4,905 $0.00 $0.00
Exercise Common Stock F1 4,905 $16.27 $80K
Sale Common Stock F2, F1 4,005 $79.01 $316K
Sale Common Stock F3, F1 900 $80.91 $73K
Holdings After Transaction: Stock Options (Right to Buy) — 22,635 contracts (Direct); Common Stock — 96,687 shares (Direct)
Footnotes (4)
  1. F1. Includes 1,241 shares of restricted stock that vest on June 17, 2027.
  2. F2. The price reported in Column 4 is the weighted average price. These shares were sold in multiple transactions at prices ranging from $79.00 to $79.19, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (2) and (3).
  3. F3. The price reported in Column 4 is the weighted average price. These shares were sold in multiple transactions at prices ranging from $80.67 to $80.94, inclusive.
  4. F4. Stock options granted under the Willdan Group, Inc. Amended and Restated 2008 Performance Incentive Plan, which vested in three equal installments on each of November 3, 2017, November 3, 2018 and November 3, 2019.
Options exercised 4,905 shares Stock options exercised into common stock on September 15, 2026
Exercise price $16.27 per share Exercise price of stock options converted into 4,905 shares
Shares sold at $79.01 4,005 shares Weighted average sale price of one block of common shares on September 15, 2026
Shares sold at $80.91 900 shares Weighted average sale price of second block of common shares on September 15, 2026
Options held after exercise 22,635 options Stock options outstanding following the reported exercise
Restricted stock scheduled to vest 1,241 shares Restricted shares vesting on June 17, 2027
weighted average price financial
"The price reported ... is the weighted average price."
Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.
restricted stock financial
"Includes 1,241 shares of restricted stock that vest on June 17, 2027."
Shares granted to an individual that carry limits on transfer or sale until certain conditions are met, such as staying with the company for a set time or hitting performance targets. Think of them as a locked gift that gradually opens; for investors they matter because they affect how many shares may enter the market later, signal management incentives and potential dilution, and reveal confidence in future company performance.
vest financial
"Includes 1,241 shares of restricted stock that vest on June 17, 2027."
A vest is the process by which an employee earns the right to receive certain benefits or ownership interests, such as stock or retirement funds, over time. It’s similar to earning a reward gradually, ensuring that the benefit becomes fully yours only after a set period or meeting specific conditions. This makes it important for investors because it determines when they can actually claim or use those benefits.

FAQ

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

What insider transaction did WLDN director Thomas Donald Brisbin report?

He reported exercising stock options for 4,905 shares of Willdan Group common stock on September 15, 2026 at an exercise price of $16.27 per share, then selling all 4,905 shares in open-market transactions the same day.

At what prices were the WLDN shares sold by the director on September 15, 2026?

He sold 4,005 shares at a weighted average price of $79.01 per share and 900 shares at a weighted average price of $80.91 per share, in multiple transactions within the price ranges described in the footnotes.

How many Willdan Group options does the reporting person hold after this Form 4?

After the reported exercise, he held 22,635 stock options representing rights to buy Willdan Group common stock, as of the Form 4 reporting date.

Were the WLDN insider sales made under a Rule 10b5-1 trading plan?

No. The Form 4 indicates that no Rule 10b5-1 trading plan is reported for these transactions.

What restricted stock holdings does the WLDN director have according to the filing?

His holdings include 1,241 shares of restricted stock that are scheduled to vest on June 17, 2027, as disclosed in a footnote.

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

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Learn about SEC filing dates
SEC Form 4
FORM 4UNITED 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*
Brisbin Thomas Donald

(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)
XDirector10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
09/15/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock09/15/2026M4,905A$16.27101,592(1)D
Common Stock09/15/2026S4,005D$79.01(2)97,587(1)D
Common Stock09/15/2026S900D$80.91(3)96,687(1)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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Stock Options (Right to Buy)$16.2709/15/2026M4,90511/03/2017(4)11/03/2026Common Stock4,905$022,635D
Explanation of Responses:
1. Includes 1,241 shares of restricted stock that vest on June 17, 2027.
2. The price reported in Column 4 is the weighted average price. These shares were sold in multiple transactions at prices ranging from $79.00 to $79.19, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (2) and (3).
3. The price reported in Column 4 is the weighted average price. These shares were sold in multiple transactions at prices ranging from $80.67 to $80.94, inclusive.
4. Stock options granted under the Willdan Group, Inc. Amended and Restated 2008 Performance Incentive Plan, which vested in three equal installments on each of November 3, 2017, November 3, 2018 and November 3, 2019.
/s/ Creighton K. Early, Attorney-in-Fact for Thomas D. Brisbin09/16/2026
** Signature of Reporting PersonDate
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)

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