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 OSG
| 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 |
|---|---|---|---|---|---|---|
| Oct 30, 2026 | SCHEDULE 13G/A (amended) | OSG Octave Specialty Group, Inc. | Vanguard Capital Management | 2.16M | 4.8% | SCHEDULE 13G/A ↗ |
| Oct 27, 2026 | SCHEDULE 13G | OSG Octave Specialty Group, Inc. | BlackRock Portfolio Management LLC | 2.94M | 6.5% | SCHEDULE 13G ↗ |
| Jul 31, 2026 | SCHEDULE 13G | OSG Octave Specialty Group, Inc. | Vanguard Capital Management | 2.27M | 5.0% | SCHEDULE 13G ↗ |
| May 11, 2026 | SCHEDULE 13G/A (amended) | OSG Octave Specialty Group, Inc. | Jane Street Global Trading, LLC | 350,603 | 0.8% | SCHEDULE 13G/A ↗ |
| May 11, 2026 | SCHEDULE 13G/A (amended) | OSG Octave Specialty Group, Inc. | Jane Street Options, LLC | 102 | 0.0% | SCHEDULE 13G/A ↗ |
| May 11, 2026 | SCHEDULE 13G/A (amended) | OSG Octave Specialty Group, Inc. | Jane Street Capital, LLC | 420,679 | 0.9% | SCHEDULE 13G/A ↗ |
| May 11, 2026 | SCHEDULE 13G/A (amended) | OSG Octave Specialty Group, Inc. | Jane Street Group, LLC | 771,384 | 1.7% | SCHEDULE 13G/A ↗ |
| May 11, 2026 | SCHEDULE 13G/A (amended) | OSG Octave Specialty Group, Inc. | Western Standard LLC | 2.25M | 5.0% | SCHEDULE 13G/A ↗ |
| Mar 27, 2026 | SCHEDULE 13G/A (amended) | OSG Octave Specialty Group, Inc. | The Vanguard Group | 0 | 0.0% | SCHEDULE 13G/A ↗ |
| Feb 12, 2026 | SCHEDULE 13G | OSG Octave Specialty Group, Inc. | Western Standard LLC | 2.57M | 5.9% | SCHEDULE 13G ↗ |
| Feb 11, 2026 | SCHEDULE 13G | OSG Octave Specialty Group, Inc. | Jane Street Global Trading, LLC | 270,179 | 0.6% | SCHEDULE 13G ↗ |
| Feb 11, 2026 | SCHEDULE 13G | OSG Octave Specialty Group, Inc. | Jane Street Options, LLC | 1.47M | 3.4% | SCHEDULE 13G ↗ |
| Feb 11, 2026 | SCHEDULE 13G | OSG Octave Specialty Group, Inc. | Jane Street Capital, LLC | 634,716 | 1.5% | SCHEDULE 13G ↗ |
| Feb 11, 2026 | SCHEDULE 13G | OSG Octave Specialty Group, Inc. | Jane Street Group, LLC | 2.38M | 5.4% | SCHEDULE 13G ↗ |
| Nov 13, 2025 | SCHEDULE 13G/A (amended) | OSG Octave Specialty Group, Inc. | Susquehanna Securities, LLC | 1.02M | 2.2% | SCHEDULE 13G/A ↗ |
| Nov 13, 2025 | SCHEDULE 13G/A (amended) | OSG Octave Specialty Group, Inc. | SIG Brokerage, LP | 1.02M | 2.2% | SCHEDULE 13G/A ↗ |
| Nov 13, 2025 | SCHEDULE 13G/A (amended) | OSG Octave Specialty Group, Inc. | G1 Execution Services, LLC | 1.02M | 2.2% | SCHEDULE 13G/A ↗ |
| Oct 17, 2025 | SCHEDULE 13G/A (amended) | OSG Octave Specialty Group, Inc. | BlackRock, Inc. | 3.54M | 7.6% | SCHEDULE 13G/A ↗ |
| Oct 9, 2025 | SCHEDULE 13G/A (amended) | OSG Octave Specialty Group, Inc. | Dimensional Fund Advisors LP | 2.14M | 4.6% | SCHEDULE 13G/A ↗ |
| Aug 14, 2025 | SCHEDULE 13G | OSG Octave Specialty Group, Inc. | Susquehanna Securities, LLC | 2.38M | 5.1% | SCHEDULE 13G ↗ |
| Aug 14, 2025 | SCHEDULE 13G | OSG Octave Specialty Group, Inc. | SIG Brokerage, LP | 2.38M | 5.1% | SCHEDULE 13G ↗ |
| Apr 30, 2025 | SCHEDULE 13G/A (amended) | OSG Octave Specialty Group, Inc. | The Vanguard Group | 2.66M | 5.8% | SCHEDULE 13G/A ↗ |
| Apr 3, 2025 | SCHEDULE 13G/A (amended) | OSG Octave Specialty Group, Inc. | BlackRock, Inc. | 4.00M | 8.7% | SCHEDULE 13G/A ↗ |
| Jan 30, 2025 | SCHEDULE 13G/A (amended) | OSG Octave Specialty Group, Inc. | The Vanguard Group | 3.22M | 6.8% | SCHEDULE 13G/A ↗ |
24 items, most recent first (up to 50). Every row links to its original filing. Updated Nov 15, 2026, 5:59 PM EST.
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