Feeds › Ownership stakes (13D / 13G)
Ownership stakes (13D / 13G)
Investors who own more than 5% of a company, from activists (13D) to passive holders (13G).
About this data
- What it is
- An investor who owns more than 5% of a public company must say so. Investors who may try to influence the company, such as activists, file the longer Schedule 13D; passive holders file the shorter Schedule 13G.
- Who files it
- The investor, within days of crossing 5%, and again whenever the stake changes materially.
- How current
- We collect new filings throughout the day on SEC business days.
- Worth knowing
- 13G filings are far more common than 13D. A 13D usually means the investor intends to push for changes, so it tends to get more attention.
All of this comes from public filings.
Source and freshness · Information, not investment advice (disclaimer).
Filings per day, last 30 days
13D (activist) 13G (passive)
Latest ownership filings
Showing: ticker MWH
| Filed | ScheduleBoth report a stake of more than 5%. A 13D is filed by investors who may try to influence the company, such as activists; a 13G by passive holders. | Company | Investor | Shares | % of shares | Filing |
|---|---|---|---|---|---|---|
| Nov 13, 2026 | SCHEDULE 13G/A (amended) | MWH SOLV Energy, Inc. | American Securities LLC | 148.49M | 73.6% | SCHEDULE 13G/A ↗ |
| Nov 13, 2026 | SCHEDULE 13G/A (amended) | MWH SOLV Energy, Inc. | ASP Manager Corp. | 148.49M | 73.6% | SCHEDULE 13G/A ↗ |
| Nov 13, 2026 | SCHEDULE 13G/A (amended) | MWH SOLV Energy, Inc. | SOLV Energy Management Holdings LP | 21.25M | 13.9% | SCHEDULE 13G/A ↗ |
| Nov 13, 2026 | SCHEDULE 13G/A (amended) | MWH SOLV Energy, Inc. | ASP VIII CSE Holdings LP | 77.88M | 59.2% | SCHEDULE 13G/A ↗ |
| Nov 13, 2026 | SCHEDULE 13G/A (amended) | MWH SOLV Energy, Inc. | ASP VIII SOLV Holdings LP | 77.88M | 59.2% | SCHEDULE 13G/A ↗ |
| Nov 13, 2026 | SCHEDULE 13G/A (amended) | MWH SOLV Energy, Inc. | American Securities Associates VIII, LLC | 49.36M | 27.3% | SCHEDULE 13G/A ↗ |
| Nov 13, 2026 | SCHEDULE 13G/A (amended) | MWH SOLV Energy, Inc. | AS/ASP VIII Co-Investor LLC | 49.36M | 27.3% | SCHEDULE 13G/A ↗ |
| Nov 13, 2026 | SCHEDULE 13G/A (amended) | MWH SOLV Energy, Inc. | ASP VIII Alternative Investments L.P. | 49.36M | 27.3% | SCHEDULE 13G/A ↗ |
| Nov 13, 2026 | SCHEDULE 13G/A (amended) | MWH SOLV Energy, Inc. | American Securities Partners VIII(B), L.P. | 49.36M | 27.3% | SCHEDULE 13G/A ↗ |
| Nov 13, 2026 | SCHEDULE 13G/A (amended) | MWH SOLV Energy, Inc. | ASP VIII Alternative Investments Solstice, L.P. | 77.88M | 59.2% | SCHEDULE 13G/A ↗ |
| Nov 13, 2026 | SCHEDULE 13G/A (amended) | MWH SOLV Energy, Inc. | ASP SOLV Aggregator LP | 36.56M | 21.8% | SCHEDULE 13G/A ↗ |
| Nov 13, 2026 | SCHEDULE 13G/A (amended) | MWH SOLV Energy, Inc. | ASP Endeavor Investco LP | 12.80M | 8.9% | SCHEDULE 13G/A ↗ |
| Aug 11, 2026 | SCHEDULE 13G/A (amended) | MWH SOLV Energy, Inc. | American Securities LLC | 157.82M | 79.4% | SCHEDULE 13G/A ↗ |
| Aug 11, 2026 | SCHEDULE 13G/A (amended) | MWH SOLV Energy, Inc. | ASP Manager Corp. | 157.82M | 79.4% | SCHEDULE 13G/A ↗ |
| Aug 11, 2026 | SCHEDULE 13G/A (amended) | MWH SOLV Energy, Inc. | SOLV Energy Management Holdings LP | 22.64M | 15.5% | SCHEDULE 13G/A ↗ |
| Aug 11, 2026 | SCHEDULE 13G/A (amended) | MWH SOLV Energy, Inc. | ASP VIII CSE Holdings LP | 82.74M | 66.9% | SCHEDULE 13G/A ↗ |
| Aug 11, 2026 | SCHEDULE 13G/A (amended) | MWH SOLV Energy, Inc. | ASP VIII SOLV Holdings LP | 82.74M | 66.9% | SCHEDULE 13G/A ↗ |
| Aug 11, 2026 | SCHEDULE 13G/A (amended) | MWH SOLV Energy, Inc. | American Securities Associates VIII, LLC | 52.44M | 29.8% | SCHEDULE 13G/A ↗ |
| Aug 11, 2026 | SCHEDULE 13G/A (amended) | MWH SOLV Energy, Inc. | AS/ASP VIII Co-Investor LLC | 52.44M | 29.8% | SCHEDULE 13G/A ↗ |
| Aug 11, 2026 | SCHEDULE 13G/A (amended) | MWH SOLV Energy, Inc. | ASP VIII Alternative Investments L.P. | 52.44M | 29.8% | SCHEDULE 13G/A ↗ |
| Aug 11, 2026 | SCHEDULE 13G/A (amended) | MWH SOLV Energy, Inc. | American Securities Partners VIII(B), L.P. | 52.44M | 29.8% | SCHEDULE 13G/A ↗ |
| Aug 11, 2026 | SCHEDULE 13G/A (amended) | MWH SOLV Energy, Inc. | ASP VIII Alternative Investments Solstice, L.P. | 82.74M | 66.9% | SCHEDULE 13G/A ↗ |
| Aug 11, 2026 | SCHEDULE 13G/A (amended) | MWH SOLV Energy, Inc. | ASP SOLV Aggregator LP | 38.85M | 23.9% | SCHEDULE 13G/A ↗ |
| Aug 11, 2026 | SCHEDULE 13G/A (amended) | MWH SOLV Energy, Inc. | ASP Endeavor Investco LP | 13.59M | 9.9% | SCHEDULE 13G/A ↗ |
| May 7, 2026 | SCHEDULE 13G | MWH SOLV Energy, Inc. | American Securities LLC | 174.78M | 88.1% | SCHEDULE 13G ↗ |
| May 7, 2026 | SCHEDULE 13G | MWH SOLV Energy, Inc. | ASP Manager Corp. | 174.78M | 88.1% | SCHEDULE 13G ↗ |
| May 7, 2026 | SCHEDULE 13G | MWH SOLV Energy, Inc. | SOLV Energy Management Holdings LP | 25.16M | 17.9% | SCHEDULE 13G ↗ |
| May 7, 2026 | SCHEDULE 13G | MWH SOLV Energy, Inc. | ASP VIII CSE Holdings LP | 91.57M | 79.4% | SCHEDULE 13G ↗ |
| May 7, 2026 | SCHEDULE 13G | MWH SOLV Energy, Inc. | ASP VIII SOLV Holdings LP | 91.57M | 79.4% | SCHEDULE 13G ↗ |
| May 7, 2026 | SCHEDULE 13G | MWH SOLV Energy, Inc. | American Securities Associates VIII, LLC | 58.04M | 33.5% | SCHEDULE 13G ↗ |
| May 7, 2026 | SCHEDULE 13G | MWH SOLV Energy, Inc. | AS/ASP VIII Co-Investor LLC | 58.04M | 33.5% | SCHEDULE 13G ↗ |
| May 7, 2026 | SCHEDULE 13G | MWH SOLV Energy, Inc. | ASP VIII Alternative Investments L.P. | 58.04M | 33.5% | SCHEDULE 13G ↗ |
| May 7, 2026 | SCHEDULE 13G | MWH SOLV Energy, Inc. | American Securities Partners VIII(B), L.P. | 58.04M | 33.5% | SCHEDULE 13G ↗ |
| May 7, 2026 | SCHEDULE 13G | MWH SOLV Energy, Inc. | ASP VIII Alternative Investments Solstice, L.P. | 91.57M | 79.4% | SCHEDULE 13G ↗ |
| May 7, 2026 | SCHEDULE 13G | MWH SOLV Energy, Inc. | ASP SOLV Aggregator LP | 42.99M | 27.2% | SCHEDULE 13G ↗ |
| May 7, 2026 | SCHEDULE 13G | MWH SOLV Energy, Inc. | ASP Endeavor Investco LP | 15.05M | 11.5% | SCHEDULE 13G ↗ |
36 items, most recent first (up to 50). Every row links to its original filing. Updated Nov 15, 2026, 6:16 PM EST.
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