United States Professional & Commercial Services

Willdan Group Inc (WLDN)

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Willdan Group Inc. has seen significant insider selling over the past 90 days, with a net value of approximately $6.1 million. CEO Michael Bieber accounted for the bulk of these transactions in May 2026. These sales follow the company's recent earnings report, which showed a slight earnings miss, and occur amid a 10.6% decline in stock price.
Ticker: WLDN Exchange: NMS
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• Purchase • Sale • Planned purchase • Planned sale Net purchase Net sale Buy signal Sell signal Earnings
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Insider trades have triggered activity signals for Willdan Group Inc. Upgrade to see score, net flow, insiders and the full signal context.

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Trades
Sale 14 May 2026
Value US$3,064,356.09 | Price 131.32 | Shares 58,721 (+31.3%)
Sale 14 May 2026
Value US$2,565,436.75 | Price 132.61 | Shares 42,844 (+1.0%)
Sale 14 May 2026
Value US$2,116,229.25 | Price 91.95 | Shares 23,015 (-8.2%)
Sale 14 May 2026
Value US$2,310,987.52 | Price 90.88 | Shares 25,429 (-8.3%)
Abbreviations B: Buy, S: Sell, PP: Planned purchase, PlS: Planned sale, PrS: Proposed sale, O: Option / Other
Notification date Transaction date B/S Transaction type Insider and/or position Nb. shares
Price
Value 		Number of shares Price Value Details
2026-05-15 2026-05-14 S Sale
2.6
BIEBER MICHAEL A

PRESIDENT AND CEO

Executive Director
58,721 +31.3%
131.32
US$3,064,356 		58,721 +31.3% 131.32 US$3,064,356
2026-05-15 2026-05-14 S Sale
2.6
BIEBER MICHAEL A

PRESIDENT AND CEO

Executive Director
42,844 +1.0%
132.61
US$2,565,437 		42,844 +1.0% 132.61 US$2,565,437
2026-05-15 2026-05-14 S Sale
2.6
BIEBER MICHAEL A

PRESIDENT AND CEO

Executive Director
27,233 +20.1%
264.22
US$97,508 		27,233 +20.1% 264.22 US$97,508
2026-05-15 2026-05-14 S Sale
2.6
BIEBER MICHAEL A

PRESIDENT AND CEO

Executive Director
25,429 -8.3%
90.88
US$2,310,988 		25,429 -8.3% 90.88 US$2,310,988
2026-05-14 2026-05-14 PrS Proposed sale
2.6
MICHAEL BIEBER

Officer; Director

Executive Director
56,676
91.58
US$5,190,150 		56,676 91.58 US$5,190,150
2026-05-14 2026-05-13 S Sale
2.6
BIEBER MICHAEL A

PRESIDENT AND CEO

Executive Director
9,991 -3.8%
92.65
US$925,666 		9,991 -3.8% 92.65 US$925,666
2026-05-13 2026-05-13 PrS Proposed sale
2.6
MICHAEL BIEBER

Officer; Director

Executive Director
9,991
92.65
US$925,690 		9,991 92.65 US$925,690
2026-03-10 2026-03-06 S Sale
2.9
Cohen Steven A
Non-Executive Director
6,000 -22.3%
81.82
US$490,920 		6,000 -22.3% 81.82 US$490,920
2026-03-06 2026-03-06 PrS Proposed sale
2.9
STEVEN A COHEN

Director

Non-Executive Director
6,000
81.82
US$490,908 		6,000 81.82 US$490,908
2025-09-22 2025-09-18 S Sale
2.4
CHEN MICAH

EXECUTIVE VP & GENERAL COUNSEL

Officer
10,000 -19.8%
106.00
US$1,060,000 		10,000 -19.8% 106.00 US$1,060,000
2025-09-22 2025-09-18 S Sale
2.8
McGinn Dennis V
Non-Executive Director
7,298 -39.2%
106.32
US$775,923 		7,298 -39.2% 106.32 US$775,923
2025-09-18 2025-09-18 PrS Proposed sale
2.8
DENNIS MCGINN

Director

Non-Executive Director
7,298
106.32
US$775,910 		7,298 106.32 US$775,910
2025-09-18 2025-09-18 PrS Proposed sale
2.4
MICAH CHEN

Officer

Officer
10,000
106.00
US$1,060,000 		10,000 106.00 US$1,060,000
2025-08-26 2025-08-25 S Sale
3.4
Brisbin Thomas Donald
Non-Executive Director
5,182 -6.8%
118.15
US$612,253 		5,182 -6.8% 118.15 US$612,253
2025-08-25 2025-08-25 PrS Proposed sale
3.4
THOMAS BRISBIN

Director

Non-Executive Director
5,182
118.15
US$612,256 		5,182 118.15 US$612,256
2025-08-26 2025-08-22 S Sale
3.4
Brisbin Thomas Donald
Non-Executive Director
27,492 -28.0%
110.84
US$3,047,213 		27,492 -28.0% 110.84 US$3,047,213
2025-08-26 2025-08-22 S Sale
3.4
Brisbin Thomas Donald
Non-Executive Director
33,096 -25.2%
109.39
US$3,620,371 		33,096 -25.2% 109.39 US$3,620,371
2025-08-26 2025-08-22 S Sale
3.4
Brisbin Thomas Donald
Non-Executive Director
24,988 -16.0%
108.90
US$2,721,193 		24,988 -16.0% 108.90 US$2,721,193
2025-08-26 2025-08-22 S Sale
3.4
Brisbin Thomas Donald
Non-Executive Director
8,974 -5.4%
107.65
US$966,051 		8,974 -5.4% 107.65 US$966,051
2025-08-26 2025-08-22 S Sale
3.4
Brisbin Thomas Donald
Non-Executive Director
7,520 -4.4%
106.68
US$802,234 		7,520 -4.4% 106.68 US$802,234
2025-08-26 2025-08-22 S Sale
3.4
Brisbin Thomas Donald
Non-Executive Director
4,910 -2.8%
105.36
US$517,318 		4,910 -2.8% 105.36 US$517,318
2025-08-26 2025-08-22 S Sale
3.4
Brisbin Thomas Donald
Non-Executive Director
10,615 -5.6%
104.58
US$1,110,117 		10,615 -5.6% 104.58 US$1,110,117
2025-08-25 2025-08-21 S Sale
3.4
Brisbin Thomas Donald
Non-Executive Director
100 -0.1%
106.34
US$10,634 		100 -0.1% 106.34 US$10,634
2025-08-25 2025-08-21 S Sale
3.4
Brisbin Thomas Donald
Non-Executive Director
33,380 -15.1%
105.91
US$3,535,276 		33,380 -15.1% 105.91 US$3,535,276
2025-08-25 2025-08-21 S Sale
3.4
Brisbin Thomas Donald
Non-Executive Director
33,950 -13.3%
104.66
US$3,553,207 		33,950 -13.3% 104.66 US$3,553,207
2025-08-25 2025-08-21 S Sale
3.4
Brisbin Thomas Donald
Non-Executive Director
33,464 -11.6%
103.95
US$3,478,583 		33,464 -11.6% 103.95 US$3,478,583
2025-08-25 2025-08-21 S Sale
3.4
Brisbin Thomas Donald
Non-Executive Director
17,106 -5.6%
103.01
US$1,762,089 		17,106 -5.6% 103.01 US$1,762,089
2025-08-25 2025-08-21 S Sale
3.4
Brisbin Thomas Donald
Non-Executive Director
7,000 -2.2%
101.87
US$713,090 		7,000 -2.2% 101.87 US$713,090
2025-08-21 2025-08-20 S Sale
3.4
Brisbin Thomas Donald
Non-Executive Director
7,405 -2.3%
104.19
US$771,527 		7,405 -2.3% 104.19 US$771,527
2025-08-20 2025-08-18 S Sale
3.4
Brisbin Thomas Donald
Non-Executive Director
7,206 -2.2%
111.21
US$801,379 		7,206 -2.2% 111.21 US$801,379
2025-08-20 2025-08-18 S Sale
3.4
Brisbin Thomas Donald
Non-Executive Director
26,258 -7.4%
110.51
US$2,901,772 		26,258 -7.4% 110.51 US$2,901,772
2025-08-20 2025-08-18 S Sale
3.4
Brisbin Thomas Donald
Non-Executive Director
58,303 -14.1%
109.51
US$6,384,762 		58,303 -14.1% 109.51 US$6,384,762
2025-08-20 2025-08-18 S Sale
3.4
Brisbin Thomas Donald
Non-Executive Director
33,233 -7.5%
108.63
US$3,610,101 		33,233 -7.5% 108.63 US$3,610,101
2025-08-20 2025-08-18 S Sale
3.4
Brisbin Thomas Donald
Non-Executive Director
300 -0.1%
113.01
US$33,903 		300 -0.1% 113.01 US$33,903
2025-08-20 2025-08-18 S Sale
3.4
Brisbin Thomas Donald
Non-Executive Director
4,782 -1.1%
112.30
US$537,019 		4,782 -1.1% 112.30 US$537,019
2025-08-18 2025-08-18 PrS Proposed sale
3.4
THOMAS BRISBIN

Director

Non-Executive Director
5,082
112.34
US$570,905 		5,082 112.34 US$570,905
2025-08-18 2025-08-15 S Sale
3.0
Downes Cynthia
Non-Executive Director
2,763 -23.7%
109.43
US$302,355 		2,763 -23.7% 109.43 US$302,355
2025-08-15 2025-08-15 PrS Proposed sale
3.0
CYNTHIA DOWNES

Director

Non-Executive Director
2,763
109.43
US$302,358 		2,763 109.43 US$302,358
2025-08-18 2025-08-14 S Sale
3.1
REDER WANDA KAY
Non-Executive Director
850 -7.4%
119.46
US$101,541 		850 -7.4% 119.46 US$101,541
2025-08-14 2025-08-14 PrS Proposed sale
3.1
WANDA REDER

Director

Non-Executive Director
850
119.46
US$101,541 		850 119.46 US$101,541
2025-08-15 2025-08-13 S Sale
3.3
EARLY CREIGHTON K

EXECUTIVE VP AND CFO

Officer
7,764 -9.7%
116.54
US$904,817 		7,764 -9.7% 116.54 US$904,817
2025-08-13 2025-08-13 PrS Proposed sale
3.3
CREIGHTON K EARLY

Officer

Officer
7,764
116.54
US$904,819 		7,764 116.54 US$904,819
2025-08-14 2025-08-12 S Sale
2.9
Cohen Steven A
Non-Executive Director
2,500 -8.5%
116.34
US$290,850 		2,500 -8.5% 116.34 US$290,850
2025-08-12 2025-08-12 PrS Proposed sale
2.9
STEVEN A COHEN

Director

Non-Executive Director
2,500
116.34
US$290,856 		2,500 116.34 US$290,856
2025-05-29 2025-05-28 S Sale
3.3
EARLY CREIGHTON K

EXECUTIVE VP AND CFO

Officer
5,000 -6.5%
53.28
US$266,400 		5,000 -6.5% 53.28 US$266,400
2025-05-28 2025-05-28 PrS Proposed sale
3.3
CREIGHTON K EARLY

Officer

Officer
5,000
53.28
US$266,402 		5,000 53.28 US$266,402
2025-05-29 2025-05-27 S Sale
3.4
Brisbin Thomas Donald
Non-Executive Director
22,459 -5.0%
52.34
US$1,175,504 		22,459 -5.0% 52.34 US$1,175,504
2025-05-27 2025-05-27 PrS Proposed sale
3.4
THOMAS BRISBIN

Director

Non-Executive Director
22,459
52.34
US$1,175,504 		22,459 52.34 US$1,175,504
2025-05-28 2025-05-23 S Sale
3.4
Brisbin Thomas Donald
Non-Executive Director
1,626 -0.4%
51.54
US$83,804 		1,626 -0.4% 51.54 US$83,804
2025-05-27 2025-05-22 S Sale
3.4
Brisbin Thomas Donald
Non-Executive Director
5,915 -1.4%
52.04
US$307,817 		5,915 -1.4% 52.04 US$307,817
2025-05-20 2025-05-20 PrS Proposed sale
3.4
Brisbin Thomas Donald

Director

Non-Executive Director
10,000
51.53
US$515,300 		10,000 51.53 US$515,300
2025-05-21 2025-05-19 S Sale
2.4
CHEN MICAH

EXECUTIVE VP & GENERAL COUNSEL

Officer
10,000 -20.6%
50.50
US$505,000 		10,000 -20.6% 50.50 US$505,000
2025-05-19 2025-05-19 PrS Proposed sale
3.4
Brisbin Thomas Donald

Director

Non-Executive Director
20,000
51.27
US$1,025,400 		20,000 51.27 US$1,025,400
2025-05-20 2025-05-16 S Sale
2.4
CHEN MICAH

EXECUTIVE VP & GENERAL COUNSEL

Officer
10,000 -20.6%
48.20
US$482,000 		10,000 -20.6% 48.20 US$482,000
2025-05-20 2025-05-16 S Sale
2.6
BIEBER MICHAEL A

PRESIDENT AND CEO

Executive Director
25,000 -11.1%
48.11
US$1,202,750 		25,000 -11.1% 48.11 US$1,202,750
2025-05-20 2025-05-16 S Sale
3.4
Brisbin Thomas Donald
Non-Executive Director
20,000 -4.5%
48.54
US$970,800 		20,000 -4.5% 48.54 US$970,800
2025-05-16 2025-05-16 PrS Proposed sale
2.4
CHEN MICAH

Officer

Officer
10,000
49.00
US$490,000 		10,000 49.00 US$490,000
2025-05-16 2025-05-16 PrS Proposed sale
2.6
BIEBER MICHAEL A

Officer

Officer
25,000
48.10
US$1,202,500 		25,000 48.10 US$1,202,500
2025-05-15 2025-05-15 PrS Proposed sale
2.4
CHEN MICAH

Officer

Officer
10,000
47.75
US$477,500 		10,000 47.75 US$477,500
2025-05-13 2025-05-13 PrS Proposed sale
3.4
Brisbin Thomas Donald

Director

Non-Executive Director
20,000
48.05
US$961,000 		20,000 48.05 US$961,000
2025-03-21 2025-03-21 PrS Proposed sale
2.4
CHEN MICAH

Officer

Officer
20,000
45.00
US$900,000 		20,000 45.00 US$900,000
2025-03-13 2025-03-12 S Sale
2.2
Shahidehpour Mohammad
Non-Executive Director
2,273 -15.1%
39.20
US$89,102 		2,273 -15.1% 39.20 US$89,102
2025-03-12 2025-03-12 PrS Proposed sale
2.2
Shahidehpour Mohammad

Director

Non-Executive Director
2,273
39.20
US$89,102 		2,273 39.20 US$89,102
2024-12-10 2024-12-09 S Sale
3.3
EARLY CREIGHTON K

EXECUTIVE VP AND CFO

Officer
4,349 -5.9%
43.13
US$187,572 		4,349 -5.9% 43.13 US$187,572
2024-12-10 2024-12-06 S Sale
3.3
EARLY CREIGHTON K

EXECUTIVE VP AND CFO

Officer
234 -0.3%
43.50
US$10,179 		234 -0.3% 43.50 US$10,179
2024-12-06 2024-12-06 PrS Proposed sale
3.3
EARLY CREIGHTON K

Officer

Officer
6,039
43.50
US$262,696 		6,039 43.50 US$262,696
2024-12-16 2024-11-25 S Sale
3.4
Brisbin Thomas Donald
Non-Executive Director
7,700 -1.9%
43.45
US$334,565 		7,700 -1.9% 43.45 US$334,565
2024-12-16 2024-11-22 S Sale
3.4
Brisbin Thomas Donald
Non-Executive Director
7,700 -1.8%
42.34
US$326,018 		7,700 -1.8% 42.34 US$326,018
2024-12-16 2024-11-21 S Sale
3.4
Brisbin Thomas Donald
Non-Executive Director
7,700 -1.8%
41.69
US$321,013 		7,700 -1.8% 41.69 US$321,013
2024-11-12 2024-11-11 PrS Proposed sale
2.6
BIEBER MICHAEL A

Officer

Officer
1,672
45.07
US$75,355 		1,672 45.07 US$75,355
2024-11-12 2024-11-11 S Sale
2.6
BIEBER MICHAEL A

PRESIDENT AND CEO

Executive Director
10,868 -5.9%
45.67
US$496,342 		10,868 -5.9% 45.67 US$496,342
2024-11-08 2024-11-06 S Sale
2.6
BIEBER MICHAEL A

PRESIDENT AND CEO

Executive Director
1,804 -1.0%
45.86
US$82,731 		1,804 -1.0% 45.86 US$82,731
2024-11-06 2024-11-06 PrS Proposed sale
2.6
BIEBER MICHAEL A

Officer

Officer
11,000
45.75
US$503,250 		11,000 45.75 US$503,250
2024-08-14 2024-08-12 S Sale
2.6
BIEBER MICHAEL A

PRESIDENT AND CEO

Executive Director
750 -0.4%
36.46
US$27,345 		750 -0.4% 36.46 US$27,345
2024-08-12 2024-08-12 PrS Proposed sale
2.6
BIEBER MICHAEL A

Officer

Officer
3,828
36.40
US$139,339 		3,828 36.40 US$139,339
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