Willdan Group, Inc.
US ˙ NasdaqGM ˙ US96924N1000

SecurityWLDN / Willdan Group, Inc.
InstitutionState Street Corp
Latest Disclosed Ownership314,700 shares
Latest Disclosed Value $ 24,093,432
State Street Corp reports 2.90% increase in ownership of WLDN / Willdan Group, Inc.

On May 15, 2026 - State Street Corp filed a 13F-HR form disclosing ownership of 314,700 shares of Willdan Group, Inc. (US:WLDN) valued at $24,093,432 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 305,845 shares of Willdan Group, Inc.. This represents a change in shares of 2.90% during the quarter. The current value of the position is $30,809,130 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F WILLDAN GROUP COM 96924N100 314,700 8,855 2.90 24,093 -24.00 0.0008
2026-02-13 2025-12-31 13F WILLDAN GROUP COM 96924N100 305,845 6,523 2.18 31,704 9.54 0.0011
2025-11-14 2025-09-30 13F WILLDAN GROUP COM 96924N100 299,322 22,357 8.07 28,941 67.16 0.0010
2025-08-14 2025-06-30 13F WILLDAN GROUP COM 96924N100 276,965 27,190 10.89 17,313 70.24 0.0006
2025-05-15 2025-03-31 13F WILLDAN GROUP COM 96924N100 249,775 1,076 0.43 10,171 7.37 0.0004
2025-02-14 2024-12-31 13F WILLDAN GROUP COM 96924N100 248,699 8,434 3.51 9,473 -3.72 0.0004
2024-11-14 2024-09-30 13F WILLDAN GROUP COM 96924N100 240,265 6,178 2.64 9,839 45.68 0.0004
2024-08-14 2024-06-30 13F WILLDAN GROUP COM 96924N100 234,087 9,911 4.42 6,753 3.92 0.0003
2024-05-15 2024-03-31 13F WILLDAN GROUP COM 96924N100 224,176 5,539 2.53 6,499 38.26 0.0003
2024-02-14 2023-12-31 13F WILLDAN GROUP COM 96924N100 218,637 3,237 1.50 4,701 6.82 0.0002
2023-11-14 2023-09-30 13F WILLDAN GROUP COM 96924N100 215,400 894 0.42 4,401 7.08 0.0002
2023-08-14 2023-06-30 13F WILLDAN GROUP COM 96924N100 214,506 2,016 0.95 4,110 23.80 0.0002
2023-05-15 2023-03-31 13F WILLDAN GROUP COM 96924N100 212,490 3,354 1.60 3,319 -11.09 0.0002
2023-05-15 2022-12-31 13F/A-99 WILLDAN GROUP COM 96924N100 209,136 -20,838 -9.06 3,733 9.60 0.0002
2023-05-15 2022-12-31 13F WILLDAN GROUP COM 96924N100 209,136 -20,838 3,733 0.0002
2022-11-15 2022-09-30 13F WILLDAN GROUP COM 96924N100 229,974 4,783 2.12 3,406 -45.16 0.0002
2022-08-15 2022-06-30 13F WILLDAN GROUP COM 96924N100 225,191 5,718 2.61 6,211 -7.79 0.0004
2022-05-16 2022-03-31 13F WILLDAN GROUP COM 96924N100 219,473 10,596 5.07 6,736 -8.38 0.0003
2022-02-14 2021-12-31 13F WILLDAN GROUP COM 96924N100 208,877 6,800 3.37 7,352 2.22 0.0003
2021-11-15 2021-09-30 13F WILLDAN GROUP COM 96924N100 202,077 -2,670 -1.30 7,192 -6.68 0.0004
2021-08-16 2021-06-30 13F WILLDAN GROUP COM 96924N100 204,747 17,327 9.25 7,707 0.17 0.0004
2021-07-09 2021-03-31 13F/A-1 WILLDAN GROUP COM 96924N100 187,420 -5,037 -2.62 7,694 -4.12 0.0004
2021-05-17 2021-03-31 13F WILLDAN GROUP COM 96924N100 187,420 -5,037 7,694 0.0004
2021-02-16 2020-12-31 13F WILLDAN GROUP COM 96924N100 192,457 -3,620 -1.85 8,025 60.44 0.0005
2020-11-10 2020-09-30 13F WILLDAN GROUP COM 96924N100 196,077 -4,290 -2.14 5,002 -0.18 0.0003
2020-08-14 2020-06-30 13F WILLDAN GROUP COM 96924N100 200,367 7,327 3.80 5,011 21.48 0.0004
2020-06-19 2020-03-31 13F/A-1 WILLDAN GROUP COM 96924N100 193,040 3,434 1.81 4,125 -31.55 0.0004
2020-05-11 2020-03-31 13F WILLDAN GROUP COM 96924N100 193,040 3,434 4,125 362.2581
2020-02-06 2019-12-31 13F WILLDAN GROUP COM 96924N100 189,606 3,592 1.93 6,026 -7.65 0.0004
2019-11-14 2019-09-30 13F WILLDAN GROUP COM 96924N100 186,014 2,038 1.11 6,525 -4.79 0.0005
2019-08-14 2019-06-30 13F WILLDAN GROUP COM 96924N100 183,976 29,116 18.80 6,853 19.37 0.0005
2019-05-15 2019-03-31 13F WILLDAN GROUP COM 96924N100 154,860 11,271 7.85 5,741 14.29 0.0004
2019-02-12 2018-12-31 13F WILLDAN GROUP COM 96924N100 143,589 21,548 17.66 5,023 21.24 0.0005
2018-11-09 2018-09-30 13F WILLDAN GROUP Common equity shares 96924N100 122,041 3,236 2.72 4,143 12.67 0.0003
2018-08-14 2018-06-30 13F WILLDAN GROUP Common equity shares 96924N100 118,805 1,663 1.42 3,677 10.55 0.0003
2018-05-15 2018-03-31 13F WILLDAN GROUP Common equity shares 96924N100 117,142 2,629 2.30 3,326 21.30 0.0003
2018-02-14 2017-12-31 13F WILLDAN GROUP Common equity shares 96924N100 114,513 -646 -0.56 2,742 -26.65 0.0002
2017-11-14 2017-09-30 13F WILLDAN GROUP Common equity shares 96924N100 115,159 15,190 15.19 3,738 22.48 0.0003
2017-08-14 2017-06-30 13F WILLDAN GROUP Common equity shares 96924N100 99,969 99,969 3,052 0.0003
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.