Insider · CIK 0001270606
Michael A Bieber
Files at WLDN (Willdan Group, Inc.). First filing Nov 8, 2024, latest May 15, 2026.
In brief
Michael A Bieber files SEC Form 4 as CEO, president and director at WLDN (Willdan Group, Inc.). Since Nov 8, 2024, Michael A Bieber has reported 0 open-market buys worth $0 and 5 open-market sells worth $7.9M, the latest filed on May 15, 2026.
A track record needs three past buys with six months of prices behind them; Michael A Bieber has 0, so none is measured yet.
The newest scored trade: sold $5.2M of WLDN on May 14, 2026, filed May 15, 2026, scored 40 (moderate). In the last 12 months: 0 buys worth $0 and 2 sells worth $6.1M.
Where the trades landed
Last year at the company this insider has traded most, with each buy and sell on the bar it happened.
WLDN: Willdan Group, Inc.
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
This insider’s open-market buys and sells, scored.
| Score | Company | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 40Moderate | WLDNsell Willdan Group, Inc. | $5.2M 56,676 shares | -19% | +100% from low-32% from high | |
| 34Weak | WLDNsell Willdan Group, Inc. | $926k 9,991 shares | -4% | +99% from low-33% from high | |
| 55Moderate | Willdan Group, Inc. | $1.2M 25,000 shares | -11% | +57% from low0% from high | |
| 36Weak | Willdan Group, Inc. | $496k 10,868 shares | -6% | - | |
| 19Weak | WLDNsell Willdan Group, Inc. | $83k 1,804 shares | -1% | - |
Planned sales
Form 144 notices this insider filed before selling restricted or control stock, newest first.
| Filed | Company | Shares | Value | Sale date | Past 3 months |
|---|---|---|---|---|---|
| May 14, 2026 | WLDN WILLDAN GROUP, INC. | 56,676 0.38% of outstanding | $5.2M | May 14, 2026 | $926k |
| May 13, 2026 | WLDN WILLDAN GROUP, INC. | 9,991 0.07% of outstanding | $926k | May 13, 2026 | none |
| May 16, 2025 | WLDN Willdan Group, Inc. | 25,000 0.17% of outstanding | $1.2M | May 16, 2025 | none |
| Nov 12, 2024 | WLDN Willdan Group, Inc. | 1,672 0.01% of outstanding | $75k | Nov 11, 2024 | $110k |
| Nov 6, 2024 | WLDN Willdan Group, Inc. | 11,000 0.08% of outstanding | $503k | Nov 6, 2024 | $1.6M |
Transactions
Every row this insider has filed, 39 in all, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| May 14, 2026 | WLDN Willdan Group, Inc. | MOption exercise Common Stock | +40,009 | $16.27 | $651k | 289,534 | May 15, 2026 |
| May 14, 2026 | WLDN Willdan Group, Inc. | MOption exercise Common Stock | +16,667 | $28.19 | $470k | 306,201 | May 15, 2026 |
| May 14, 2026 | WLDN Willdan Group, Inc. | SOpen-market sale Common Stock | -25,429 | $90.88 | $2.3M | 280,772 | May 15, 2026 |
| May 14, 2026 | WLDN Willdan Group, Inc. | SOpen-market sale Common Stock | -23,015 | $91.95 | $2.1M | 257,757 | May 15, 2026 |
| May 14, 2026 | WLDN Willdan Group, Inc. | SOpen-market sale Common Stock | -7,956 | $92.65 | $737k | 249,801 | May 15, 2026 |
| May 14, 2026 | WLDN Willdan Group, Inc. | SOpen-market sale Common Stock | -276 | $93.74 | $26k | 249,525 | May 15, 2026 |
| May 14, 2026 | WLDN Willdan Group, Inc. | MOption exercise Stock Options (Right to Buy)derivative | -40,009 | $0.00 | $0 | 0 | May 15, 2026 |
| May 14, 2026 | WLDN Willdan Group, Inc. | MOption exercise Stock Options (Right to Buy)derivative | -16,667 | $0.00 | $0 | 0 | May 15, 2026 |
| May 13, 2026 | WLDN Willdan Group, Inc. | MOption exercise Common Stock | +9,991 | $16.27 | $163k | 259,516 | May 14, 2026 |
| May 13, 2026 | WLDN Willdan Group, Inc. | SOpen-market sale Common Stock | -9,991 | $92.65 | $926k | 249,525 | May 14, 2026 |
| May 13, 2026 | WLDN Willdan Group, Inc. | MOption exercise Stock Options (Right to Buy)derivative | -9,991 | $0.00 | $0 | 40,009 | May 14, 2026 |
| Mar 25, 2026 | WLDN Willdan Group, Inc. | AGrant or award Common Stock | +15,750 | $0.00 | $0 | 255,969 | Mar 26, 2026 |
| Mar 25, 2026 | WLDN Willdan Group, Inc. | FTax withholding Common Stock | -6,444 | $82.80 | $534k | 249,525 | Mar 26, 2026 |
| Mar 20, 2026 | WLDN Willdan Group, Inc. | FTax withholding Common Stock | -2,387 | $75.52 | $180k | 240,219 | Mar 23, 2026 |
| Mar 17, 2026 | WLDN Willdan Group, Inc. | FTax withholding Common Stock | -2,625 | $78.29 | $206k | 242,606 | Mar 19, 2026 |
| Mar 16, 2026 | WLDN Willdan Group, Inc. | AGrant or award Common Stock | +17,326 | $0.00 | $0 | 252,321 | Mar 17, 2026 |
| Mar 16, 2026 | WLDN Willdan Group, Inc. | FTax withholding Common Stock | -7,090 | $78.61 | $557k | 245,231 | Mar 17, 2026 |
| Mar 11, 2026 | WLDN Willdan Group, Inc. | AGrant or award Common Stock | +18,810 | $0.00 | $0 | 242,692 | Mar 12, 2026 |
| Mar 11, 2026 | WLDN Willdan Group, Inc. | FTax withholding Common Stock | -7,697 | $83.98 | $646k | 234,995 | Mar 12, 2026 |
| Mar 9, 2026 | WLDN Willdan Group, Inc. | FTax withholding Common Stock | -1,814 | $82.98 | $151k | 223,882 | Mar 11, 2026 |
| Mar 3, 2026 | WLDN Willdan Group, Inc. | AGrant or award Common Stock | +18,000 | $0.00 | $0 | 225,696 | Mar 5, 2026 |
| Aug 18, 2025 | WLDN Willdan Group, Inc. | AGrant or award Common Stock | +12,963 | $0.00 | $0 | 214,330 | Aug 20, 2025 |
| Aug 18, 2025 | WLDN Willdan Group, Inc. | FTax withholding Common Stock | -6,788 | $109.53 | $743k | 207,542 | Aug 20, 2025 |
| May 16, 2025 | WLDN Willdan Group, Inc. | MOption exercise Common Stock | +25,000 | $13.91 | $348k | 225,981 | May 20, 2025 |
| May 16, 2025 | WLDN Willdan Group, Inc. | SOpen-market sale Common Stock | -25,000 | $48.11 | $1.2M | 200,981 | May 20, 2025 |
| May 16, 2025 | WLDN Willdan Group, Inc. | MOption exercise Stock Options (Right to Buy)derivative | -25,000 | $0.00 | $0 | 0 | May 20, 2025 |
| Mar 24, 2025 | WLDN Willdan Group, Inc. | AGrant or award Common Stock | +15,750 | $0.00 | $0 | 209,227 | Mar 26, 2025 |
| Mar 24, 2025 | WLDN Willdan Group, Inc. | FTax withholding Common Stock | -8,246 | $42.53 | $351k | 200,981 | Mar 26, 2025 |
| Mar 20, 2025 | WLDN Willdan Group, Inc. | FTax withholding Common Stock | -3,054 | $43.06 | $132k | 193,477 | Mar 24, 2025 |
| Mar 17, 2025 | WLDN Willdan Group, Inc. | AGrant or award Common Stock | +19,250 | $0.00 | $0 | 196,531 | Mar 19, 2025 |
| Mar 11, 2025 | WLDN Willdan Group, Inc. | AGrant or award Common Stock | +11,970 | $0.00 | $0 | 183,549 | Mar 12, 2025 |
| Mar 11, 2025 | WLDN Willdan Group, Inc. | FTax withholding Common Stock | -6,268 | $40.11 | $251k | 177,281 | Mar 12, 2025 |
| Mar 7, 2025 | WLDN Willdan Group, Inc. | FTax withholding Common Stock | -2,429 | $41.80 | $102k | 171,579 | Mar 11, 2025 |
| Nov 11, 2024 | WLDN Willdan Group, Inc. | MOption exercise Common Stock | +10,868 | $13.49 | $147k | 184,522 | Nov 12, 2024 |
| Nov 11, 2024 | WLDN Willdan Group, Inc. | SOpen-market sale Common Stock | -10,868 | $45.67 | $496k | 173,654 | Nov 12, 2024 |
| Nov 11, 2024 | WLDN Willdan Group, Inc. | MOption exercise Stock Options (Right to Buy)derivative | -10,868 | $0.00 | $0 | 0 | Nov 12, 2024 |
| Nov 6, 2024 | WLDN Willdan Group, Inc. | MOption exercise Common Stock | +1,804 | $13.49 | $24k | 175,458 | Nov 8, 2024 |
| Nov 6, 2024 | WLDN Willdan Group, Inc. | SOpen-market sale Common Stock | -1,804 | $45.86 | $83k | 173,654 | Nov 8, 2024 |
| Nov 6, 2024 | WLDN Willdan Group, Inc. | MOption exercise Stock Options (Right to Buy)derivative | -1,804 | $0.00 | $0 | 10,868 | Nov 8, 2024 |
Questions about Michael A Bieber
Answered from the filings on this page, as of the latest one.
Is Michael A Bieber buying or selling?
In the last 12 months Michael A Bieber reported 0 open-market buys worth $0 and 2 open-market sells worth $6.1M on SEC Form 4; the latest was sold $5.2M of WLDN on May 14, 2026. Grants, option exercises and tax withholding are not counted.
How did Michael A Bieber's past buys perform?
Not measured yet. InsiderTell needs three past buys with six months of prices to publish a track record, and Michael A Bieber has 0.
Where does Michael A Bieber file Form 4?
Michael A Bieber has filed Form 4 at WLDN (Willdan Group, Inc.) as PRESIDENT AND CEO. A Form 4 is required of officers, directors and holders of more than 10% of a share class within two business days of a trade.
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.