Engineering Services - 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 |
|
