Engineering, Architectural, And Surveying - Latest Activist Disclosures

This table shows recent activist investor (Schedule 13D) filings made in this industry. Any investor or hedge fund that makes an investment with the intention of influencing management is considered an activist investor and must file a 13D.

Date Form Target Company Investor Shares Ownership
(Percent)		 Ownership Change
(Percent)
2025-04-15 13D/A TTEK / Tetra Tech, Inc. Pictet Asset Management Sa 14,458,349 5.30 3.13
2025-04-15 13D TTEK / Tetra Tech, Inc. Pictet Asset Management Sa 14,458,349 5.30 3.13
2025-03-10 13D/A MG / Mistras Group, Inc. Mill Road Capital III, L.P. 1,763,304 5.70 10.34
2024-11-25 13D/A VSEC / VSE Corporation Koonce Calvin Scott 1,011,450 4.96 -14.71
2024-11-07 13D/A VSEC / VSE Corporation Koonce Calvin Scott 1,185,870 5.80 -17.02
2024-10-18 13D/A VSEC / VSE Corporation Koonce Calvin Scott 1,429,186 7.00 -15.84
2024-09-24 13D/A VSEC / VSE Corporation Koonce Calvin Scott 1,698,080 9.20 -9.05
2024-07-11 13D/A WLDN / Willdan Group, Inc. Forager Fund, L.P. 1,267,167 9.20 -23.33
2024-07-09 13D MG / Mistras Group, Inc. Mill Road Capital III, L.P. 1,598,045 5.20
2024-05-17 13D/A VSEC / VSE Corporation Koonce Calvin Scott 1,867,082 10.30 0.00
2024-05-03 13D/A WLDN / Willdan Group, Inc. Forager Fund, L.P. 1,652,660 12.00 -14.01
2024-04-02 13D/A VSEC / VSE Corporation Koonce Calvin Scott 1,867,082 11.90
2024-02-14 13D/A MG / Mistras Group, Inc. Sotirios Vahaviolos January 2023 2-Year Grantor Retained Annuity Trust 6,734,718 22.00 0.00
2024-02-14 13D MG / Mistras Group, Inc. Sotirios Vahaviolos January 2023 2-Year Grantor Retained Annuity Trust 6,734,718 22.00 0.00
2023-06-06 13D WLDN / Willdan Group, Inc. Forager Fund, L.P. 1,921,915 14.20 37.67
2023-05-18 13D/A ACFN / Acorn Energy, Inc. Loeb Jan H 8,358,465 20.92 5.46
2023-01-27 13D/A ACM / AECOM Starboard Value LP 6,761,000 4.90 -13.01
2023-01-26 13D MG / Mistras Group, Inc. Sotirios Vahaviolos January 2023 2-Year Grantor Retained Annuity Trust 6,734,718 22.50 0.00
2023-01-23 13D MG / Mistras Group, Inc. Sotirios Vahaviolos January 2023 2-Year Grantor Retained Annuity Trust 6,734,718 22.50
2022-01-11 13D/A THNPY / Technip Energies N.V. - Depositary Receipt (Common Stock) Bpifrance Participations SA 16,467,517 9.20 30.27
2021-05-11 13D/A THNPY / Technip Energies N.V. - Depositary Receipt (Common Stock) Bpifrance Participations SA 12,641,414 7.00 -0.00
2021-04-09 13D THNPY / Technip Energies N.V. - Depositary Receipt (Common Stock) Bpifrance Participations SA 12,641,435 7.00
2020-12-09 13D/A ACFN / Acorn Energy, Inc. Loeb Jan H 7,925,514 19.89 6.45
2020-12-09 13D/A ACM / AECOM Starboard Value LP 7,771,992 5.20 0.00
2020-11-30 13D ACM / AECOM Starboard Value LP 7,771,992 5.20
2019-07-08 13D ACFN / Acorn Energy, Inc. Leap Tide Capital Acorn Llc 4,372,017 11.00
2019-07-02 13D/A ACFN / Acorn Energy, Inc. Loeb Jan H 7,445,521 18.76 372.77
2018-12-27 13D ACFN / Acorn Energy, Inc. Loeb Jan H 1,574,870 5.31
2014-05-14 13D/A ACFN / Acorn Energy, Inc. Verition Fund Management LLC 1,072,425 4.83
2014-04-15 13D/A ACFN / Acorn Energy, Inc. Verition Fund Management LLC 1,964,545 8.85
2013-08-30 13D ACFN / Acorn Energy, Inc. Verition Fund Management LLC 2,228,413 12.30