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 TSAT
| 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 |
|---|---|---|---|---|---|---|
| Aug 14, 2026 | SCHEDULE 13G/A (amended) | TSAT Telesat Corporation | David Rosen | 0 | 0.0% | SCHEDULE 13G/A ↗ |
| Aug 14, 2026 | SCHEDULE 13G/A (amended) | TSAT Telesat Corporation | Rubric Capital Management LP | 0 | 0.0% | SCHEDULE 13G/A ↗ |
| Jul 9, 2026 | SCHEDULE 13D/A (amended) | TSAT Telesat Corporation | Mark H. Rachesky, M.D. | 18.10M | 35.5% | SCHEDULE 13D/A ↗ |
| Jul 9, 2026 | SCHEDULE 13D/A (amended) | TSAT Telesat Corporation | MHR Holdings LLC | 18.04M | 35.4% | SCHEDULE 13D/A ↗ |
| Jul 9, 2026 | SCHEDULE 13D/A (amended) | TSAT Telesat Corporation | MHR Fund Management LLC | 18.04M | 35.4% | SCHEDULE 13D/A ↗ |
| Jul 9, 2026 | SCHEDULE 13D/A (amended) | TSAT Telesat Corporation | MHR Sun III LP | 3.37M | 6.6% | SCHEDULE 13D/A ↗ |
| Jul 9, 2026 | SCHEDULE 13D/A (amended) | TSAT Telesat Corporation | The Rachesky Revocable Trust | 6.74M | 13.2% | SCHEDULE 13D/A ↗ |
| Jul 9, 2026 | SCHEDULE 13D/A (amended) | TSAT Telesat Corporation | MHR Sun GP LLC | 6.74M | 13.2% | SCHEDULE 13D/A ↗ |
| Jul 9, 2026 | SCHEDULE 13D/A (amended) | TSAT Telesat Corporation | Sat Holdco B. Mhr | 3.21M | 6.3% | SCHEDULE 13D/A ↗ |
| Jul 9, 2026 | SCHEDULE 13D/A (amended) | TSAT Telesat Corporation | Sat Subholdco B. Mhr | 2.84M | 5.6% | SCHEDULE 13D/A ↗ |
| Jul 9, 2026 | SCHEDULE 13D/A (amended) | TSAT Telesat Corporation | MHR Institutional Advisors III LLC | 3.37M | 6.6% | SCHEDULE 13D/A ↗ |
| Jul 9, 2026 | SCHEDULE 13D/A (amended) | TSAT Telesat Corporation | MHR Institutional Partners III LP | 0 | 0.0% | SCHEDULE 13D/A ↗ |
| Jul 9, 2026 | SCHEDULE 13D/A (amended) | TSAT Telesat Corporation | MHRC II LLC | 2.77M | 5.4% | SCHEDULE 13D/A ↗ |
| Jul 9, 2026 | SCHEDULE 13D/A (amended) | TSAT Telesat Corporation | MHR Institutional Advisors II LLC | 2.77M | 5.4% | SCHEDULE 13D/A ↗ |
| Jul 9, 2026 | SCHEDULE 13D/A (amended) | TSAT Telesat Corporation | MHR Institutional Partners Iia LP | 0 | 0.0% | SCHEDULE 13D/A ↗ |
| Jul 9, 2026 | SCHEDULE 13D/A (amended) | TSAT Telesat Corporation | MHRC I LLC | 2.63M | 5.2% | SCHEDULE 13D/A ↗ |
| Jul 9, 2026 | SCHEDULE 13D/A (amended) | TSAT Telesat Corporation | MHR Institutional Advisors LLC | 2.63M | 5.2% | SCHEDULE 13D/A ↗ |
| May 15, 2026 | SCHEDULE 13G/A (amended) | TSAT Telesat Corporation | William Heard | 610,570 | 4.2% | SCHEDULE 13G/A ↗ |
| May 15, 2026 | SCHEDULE 13G/A (amended) | TSAT Telesat Corporation | Heard Capital LLC | 610,570 | 4.2% | SCHEDULE 13G/A ↗ |
| Apr 2, 2026 | SCHEDULE 13D/A (amended) | TSAT Telesat Corporation | Mario J. Gabelli | 3,200 | 0.0% | SCHEDULE 13D/A ↗ |
| Apr 2, 2026 | SCHEDULE 13D/A (amended) | TSAT Telesat Corporation | Associated Capital Group, Inc. | 11,100 | 0.1% | SCHEDULE 13D/A ↗ |
| Apr 2, 2026 | SCHEDULE 13D/A (amended) | TSAT Telesat Corporation | GGCP, Inc. | 10,000 | 0.1% | SCHEDULE 13D/A ↗ |
| Apr 2, 2026 | SCHEDULE 13D/A (amended) | TSAT Telesat Corporation | MJG Associates, Inc. | 13,600 | 0.1% | SCHEDULE 13D/A ↗ |
| Apr 2, 2026 | SCHEDULE 13D/A (amended) | TSAT Telesat Corporation | Gabelli Foundation, Inc. | 50,000 | 0.3% | SCHEDULE 13D/A ↗ |
| Apr 2, 2026 | SCHEDULE 13D/A (amended) | TSAT Telesat Corporation | GABELLI & Co INVESTMENT ADVISERS, INC. | 42,211 | 0.3% | SCHEDULE 13D/A ↗ |
| Apr 2, 2026 | SCHEDULE 13D/A (amended) | TSAT Telesat Corporation | GAMCO Asset Management Inc. | 1.71M | 11.6% | SCHEDULE 13D/A ↗ |
| Apr 2, 2026 | SCHEDULE 13D/A (amended) | TSAT Telesat Corporation | Gabelli Funds LLC | 714,129 | 4.9% | SCHEDULE 13D/A ↗ |
| Apr 2, 2026 | SCHEDULE 13D/A (amended) | TSAT Telesat Corporation | Gamco Investors, Inc. Et Al | 1,200 | 0.0% | SCHEDULE 13D/A ↗ |
| Feb 17, 2026 | SCHEDULE 13G/A (amended) | TSAT Telesat Corporation | William Heard | 1.23M | 8.4% | SCHEDULE 13G/A ↗ |
| Feb 17, 2026 | SCHEDULE 13G/A (amended) | TSAT Telesat Corporation | Heard Capital LLC | 1.23M | 8.4% | SCHEDULE 13G/A ↗ |
| Aug 14, 2025 | SCHEDULE 13G/A (amended) | TSAT Telesat Corporation | William E. Heard Declaration of Trust | 1.52M | 10.4% | SCHEDULE 13G/A ↗ |
| Aug 14, 2025 | SCHEDULE 13G/A (amended) | TSAT Telesat Corporation | William Heard | 1.52M | 10.4% | SCHEDULE 13G/A ↗ |
| Aug 14, 2025 | SCHEDULE 13G/A (amended) | TSAT Telesat Corporation | Heard Investment Manager LLC | 1.52M | 10.4% | SCHEDULE 13G/A ↗ |
| Aug 14, 2025 | SCHEDULE 13G/A (amended) | TSAT Telesat Corporation | Heard Capital LLC | 1.52M | 10.4% | SCHEDULE 13G/A ↗ |
| Jun 3, 2025 | SCHEDULE 13D/A (amended) | TSAT Telesat Corporation | Mario J. Gabelli | 0 | 0.0% | SCHEDULE 13D/A ↗ |
| Jun 3, 2025 | SCHEDULE 13D/A (amended) | TSAT Telesat Corporation | Associated Capital Group, Inc. | 9,900 | 0.1% | SCHEDULE 13D/A ↗ |
| Jun 3, 2025 | SCHEDULE 13D/A (amended) | TSAT Telesat Corporation | GGCP, Inc. | 10,000 | 0.1% | SCHEDULE 13D/A ↗ |
| Jun 3, 2025 | SCHEDULE 13D/A (amended) | TSAT Telesat Corporation | MJG Associates, Inc. | 14,300 | 0.1% | SCHEDULE 13D/A ↗ |
| Jun 3, 2025 | SCHEDULE 13D/A (amended) | TSAT Telesat Corporation | Gabelli Foundation, Inc. | 57,500 | 0.4% | SCHEDULE 13D/A ↗ |
| Jun 3, 2025 | SCHEDULE 13D/A (amended) | TSAT Telesat Corporation | GABELLI & Co INVESTMENT ADVISERS, INC. | 74,061 | 0.5% | SCHEDULE 13D/A ↗ |
| Jun 3, 2025 | SCHEDULE 13D/A (amended) | TSAT Telesat Corporation | GAMCO Asset Management Inc. | 1.80M | 12.3% | SCHEDULE 13D/A ↗ |
| Jun 3, 2025 | SCHEDULE 13D/A (amended) | TSAT Telesat Corporation | Gabelli Funds LLC | 729,329 | 5.0% | SCHEDULE 13D/A ↗ |
| Jun 3, 2025 | SCHEDULE 13D/A (amended) | TSAT Telesat Corporation | Gamco Investors, Inc. Et Al | 1,200 | 0.0% | SCHEDULE 13D/A ↗ |
| May 15, 2025 | SCHEDULE 13G/A (amended) | TSAT Telesat Corporation | William E. Heard Declaration of Trust | 1.65M | 11.5% | SCHEDULE 13G/A ↗ |
| May 15, 2025 | SCHEDULE 13G/A (amended) | TSAT Telesat Corporation | William Heard | 1.65M | 11.5% | SCHEDULE 13G/A ↗ |
| May 15, 2025 | SCHEDULE 13G/A (amended) | TSAT Telesat Corporation | Heard Investment Manager LLC | 1.65M | 11.5% | SCHEDULE 13G/A ↗ |
| May 15, 2025 | SCHEDULE 13G/A (amended) | TSAT Telesat Corporation | Heard Capital LLC | 1.65M | 11.5% | SCHEDULE 13G/A ↗ |
| May 15, 2025 | SCHEDULE 13G/A (amended) | TSAT Telesat Corporation | LM Asset Fund Limited Partnership | 494,000 | 3.4% | SCHEDULE 13G/A ↗ |
| May 15, 2025 | SCHEDULE 13G/A (amended) | TSAT Telesat Corporation | LM Asset (IM) Inc. | 494,000 | 3.4% | SCHEDULE 13G/A ↗ |
| May 15, 2025 | SCHEDULE 13G/A (amended) | TSAT Telesat Corporation | Christine Man | 550,450 | 3.8% | SCHEDULE 13G/A ↗ |
Full history on every feed is part of Premium. Premium loads older rows, up to 10,000, and CSV downloads.
The newest 50 items, most recent first. Every row links to its original filing. Updated Nov 15, 2026, 6:31 PM EST.
Download CSV The rows of this feed, with the filters above. A download holds at most 10,000 rows; narrow the filters to get a smaller slice.
Other feeds: Congressional trades · Executive-branch trades · Bills in Congress · Roll-call votes · Corporate PAC donations · Lobbying · Capitol Hires · Lobbying and contracts · Government contracts · Insider trades · Planned insider sales · Executive pay · Institutional holdings (13F) · Short interest · Fails to deliver · Daily short volume · Wikipedia page views · App store ratings · H-1B visa applications · Stock splits · 8-K events · IPO filings · Deals · Private placements (Form D) · Merger clearances (HSR) · Layoff notices (WARN) · SEC enforcement · Patents · Clinical trial updates · FDA approvals and clearances