Key facts
- This page summarizes Michael A. Bieber's Form 4 filing for Willdan Group, Inc. (WLDN).
- 8 reported transactions and 2 derivative rows are listed below.
- Accepted by SEC: 15 May 2026, 18:08.
Michael A. Bieber - 14 May 2026 Form 4 Insider Report for Willdan Group, Inc. (WLDN)
- Reporting relationship
- PRESIDENT AND CEO, Director
- Issuer ticker
- WLDN
- Reported as of
- 14 May 2026
- Net transaction value
- -$5,190,212
- SEC form
- 4
- Accepted by SEC
- 15 May 2026, 18:08:15 UTC
- Prior SEC filing
- 14 May 2026
- Source filing
- View source filing
- Reporting owner signature
- /s/ Creighton K. Early, Attorney-in-fact for Michael A. Bieber
Source evidence
Original filing metadata and source links for verification.
4 source fields
Reporting owner
1 detail
Key filing fact
Michael A. Bieber filed Form 4 for Willdan Group, Inc. (WLDN) on 15 May 2026.
Change
- Previous filing in this sequence was filed on 14 May 2026.
- Current net transaction value: -$5,190,212.
Research use
- This tells you what this filing adds before you inspect full transaction and derivative tables.
- You can trace every row back to the original SEC filing document.
Evidence
Filed on Form 4
View source filing
Ownership activity is grounded in SEC Form 4 disclosures.
Reporting Owners (1)
CIK 0001270606
Primary reporting owner
BIEBER MICHAEL A
- Relationship
- PRESIDENT AND CEO, Director
- Address
- 2401 EAST KATELLA AVENUE, SUITE 300, ANAHEIM
- Signature
- /s/ Creighton K. Early, Attorney-in-fact for Michael A. Bieber
- Signature date
- 15 May 2026
Reported non-derivative transactions
Shares, units, or other non-derivative securities reported in this filing.
WLDN
transaction
Common Stock
Options Exercise
- Transaction value
- Shares
- +40,009
- Change %
- +16%
- Price
- $16.27*
- Shares after
- 289,534
- Date
- 14 May 2026
- Ownership
- Direct
- Footnotes
- F1
WLDN
transaction
Common Stock
Options Exercise
- Transaction value
- Shares
- +16,667
- Change %
- +5.8%
- Price
- $28.19*
- Shares after
- 306,201
- Date
- 14 May 2026
- Ownership
- Direct
- Footnotes
- F1
WLDN
transaction
Common Stock
Sale
- Transaction value
- $2,310,988
- Shares
- -25,429
- Change %
- -8.3%
- Price
- $90.88
- Shares after
- 280,772
- Date
- 14 May 2026
- Ownership
- Direct
- Footnotes
- F1, F2
WLDN
transaction
Common Stock
Sale
- Transaction value
- $2,116,229
- Shares
- -23,015
- Change %
- -8.2%
- Price
- $91.95
- Shares after
- 257,757
- Date
- 14 May 2026
- Ownership
- Direct
- Footnotes
- F1, F3
WLDN
transaction
Common Stock
Sale
- Transaction value
- $737,123
- Shares
- -7,956
- Change %
- -3.1%
- Price
- $92.65
- Shares after
- 249,801
- Date
- 14 May 2026
- Ownership
- Direct
- Footnotes
- F1, F4
WLDN
transaction
Common Stock
Sale
- Transaction value
- $25,872
- Shares
- -276
- Change %
- -0.11%
- Price
- $93.74
- Shares after
- 249,525
- Date
- 14 May 2026
- Ownership
- Direct
- Footnotes
- F1, F5
Reported derivative securities
Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.
WLDN
transaction
Derivative
Stock Options (Right to Buy)
Options Exercise
- Transaction value
- Shares
- -40,009
- Change %
- -100%
- Price
- $0.000000*
- Shares after
- 0
- Date
- 14 May 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 40,009
- Exercise price
- $16.27
- Footnotes
- F6
WLDN
transaction
Derivative
Stock Options (Right to Buy)
Options Exercise
- Transaction value
- Shares
- -16,667
- Change %
- -100%
- Price
- $0.000000*
- Shares after
- 0
- Date
- 14 May 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 16,667
- Exercise price
- $28.19
- Footnotes
- F7
* marks a reported price that did not pass the local price check.
Additional SEC filing notes
Filing notes and footnotes
Explanation of responses 7 footnotes
Footnote F1
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) 5,834 shares of restricted stock units that vest on March 20, 2027, subject to the Reporting Person's continued service to the Issuer through the applicable vesting date.
Footnote F2
The price reported in Column 4 is the weighted average price. These shares were sold in multiple transactions at prices ranging from $90.50 to $91.46, inclusive. The Reporting Person undertakes to provide to Willdan Group, Inc., any security holder of Willdan Group, Inc., 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), footnote (3), footnote (4), and footnote (5).
Footnote F3
The price reported in Column 4 is the weighted average price. These shares were sold in multiple transactions at prices ranging from $91.50 to $92.49, inclusive.
Footnote F4
The price reported in Column 4 is the weighted average price. These shares were sold in multiple transactions at prices ranging from $92.50 to $93.41, inclusive.
Footnote F5
The price reported in Column 4 is the weighted average price. These shares were sold in multiple transactions at prices ranging from $93.62 to $93.99, inclusive.
Footnote F6
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.
Footnote F7
Stock options granted under the Willdan Group, Inc. Amended and Restated 2008 Performance Incentive Plan, which vested in three equal installments on each of March 8, 2018, March 8, 2019, and March 8, 2020.