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 ZSTK
| 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) | ZSTK ZeroStack Corp. | Blockchain Builders, LLC | 276,271 | 1.3% | SCHEDULE 13G/A ↗ |
| Nov 13, 2026 | SCHEDULE 13G/A (amended) | ZSTK ZeroStack Corp. | Gil Rosen | 276,271 | 1.3% | SCHEDULE 13G/A ↗ |
| Nov 13, 2026 | SCHEDULE 13G/A (amended) | ZSTK ZeroStack Corp. | Blockchain Builders GP, LLC | 276,271 | 1.3% | SCHEDULE 13G/A ↗ |
| Nov 13, 2026 | SCHEDULE 13G/A (amended) | ZSTK ZeroStack Corp. | Blockchain Builders Fund I, LP | 276,271 | 1.3% | SCHEDULE 13G/A ↗ |
| Nov 13, 2026 | SCHEDULE 13G/A (amended) | ZSTK ZeroStack Corp. | Blockchain Builders, LLC | 225,989 | 9.3% | SCHEDULE 13G/A ↗ |
| Nov 13, 2026 | SCHEDULE 13G/A (amended) | ZSTK ZeroStack Corp. | Gil Rosen | 225,989 | 9.3% | SCHEDULE 13G/A ↗ |
| Nov 13, 2026 | SCHEDULE 13G/A (amended) | ZSTK ZeroStack Corp. | Blockchain Builders GP, LLC | 225,989 | 9.3% | SCHEDULE 13G/A ↗ |
| Nov 13, 2026 | SCHEDULE 13G/A (amended) | ZSTK ZeroStack Corp. | Blockchain Builders Fund I, LP | 225,989 | 9.3% | SCHEDULE 13G/A ↗ |
| Nov 13, 2026 | SCHEDULE 13G | ZSTK ZeroStack Corp. | Blockchain Builders, LLC | 82,886 | 9.9% | SCHEDULE 13G ↗ |
| Nov 13, 2026 | SCHEDULE 13G | ZSTK ZeroStack Corp. | Gil Rosen | 82,886 | 9.9% | SCHEDULE 13G ↗ |
| Nov 13, 2026 | SCHEDULE 13G | ZSTK ZeroStack Corp. | Blockchain Builders GP, LLC | 82,886 | 9.9% | SCHEDULE 13G ↗ |
| Nov 13, 2026 | SCHEDULE 13G | ZSTK ZeroStack Corp. | Blockchain Builders Fund I, LP | 82,886 | 9.9% | SCHEDULE 13G ↗ |
| Oct 19, 2026 | SCHEDULE 13G | ZSTK ZeroStack Corp. | Alexander Pack | 1.92M | 8.6% | SCHEDULE 13G ↗ |
| Oct 19, 2026 | SCHEDULE 13G | ZSTK ZeroStack Corp. | Hack VF 2022 LP | 80,015 | 0.4% | SCHEDULE 13G ↗ |
| Oct 19, 2026 | SCHEDULE 13G | ZSTK ZeroStack Corp. | Hack VF 2022 GP LLC | 80,015 | 0.4% | SCHEDULE 13G ↗ |
| Oct 19, 2026 | SCHEDULE 13G | ZSTK ZeroStack Corp. | Hack VC 2021 LP | 80,015 | 0.4% | SCHEDULE 13G ↗ |
| Oct 19, 2026 | SCHEDULE 13G | ZSTK ZeroStack Corp. | Sybil Capital Fund I GP LLC | 80,015 | 0.4% | SCHEDULE 13G ↗ |
| Oct 19, 2026 | SCHEDULE 13G | ZSTK ZeroStack Corp. | Hack Seed Fund II LP | 1.68M | 7.5% | SCHEDULE 13G ↗ |
| Oct 19, 2026 | SCHEDULE 13G | ZSTK ZeroStack Corp. | Hack Seed Fund II GP LLC | 1.68M | 7.5% | SCHEDULE 13G ↗ |
| Oct 19, 2026 | SCHEDULE 13G | ZSTK ZeroStack Corp. | 0G Segregated Portfolio, a designated Segregated Portfolio of Sybil Ventures SPC Ltd. | 80,015 | 0.4% | SCHEDULE 13G ↗ |
| Oct 19, 2026 | SCHEDULE 13G | ZSTK ZeroStack Corp. | Hack VC Management, LLC | 80,015 | 0.4% | SCHEDULE 13G ↗ |
| Sep 4, 2026 | SCHEDULE 13G | ZSTK ZeroStack Corp. | Blockcat Pte. Ltd. | 1.75M | 8.3% | SCHEDULE 13G ↗ |
| Sep 2, 2026 | SCHEDULE 13G | ZSTK ZeroStack Corp. | Puple AI Inc. | 1.75M | 8.3% | SCHEDULE 13G ↗ |
| Jul 21, 2026 | SCHEDULE 13D/A (amended) | ZSTK ZeroStack Corp. | Daniel Reis-Faria | 6.93M | 37.5% | SCHEDULE 13D/A ↗ |
| Jul 21, 2026 | SCHEDULE 13D/A (amended) | ZSTK ZeroStack Corp. | Vaiman Dany | 513,249 | 2.9% | SCHEDULE 13D/A ↗ |
| Jul 21, 2026 | SCHEDULE 13D/A (amended) | ZSTK ZeroStack Corp. | Zero Gravity Labs Inc. | 4.61M | 26.4% | SCHEDULE 13D/A ↗ |
| Jul 21, 2026 | SCHEDULE 13D/A (amended) | ZSTK ZeroStack Corp. | Michael Heinrich | 5.58M | 30.2% | SCHEDULE 13D/A ↗ |
| Apr 2, 2026 | SCHEDULE 13D/A (amended) | ZSTK ZeroStack Corp. | Zero Gravity Labs Inc. | 0 | 0.0% | SCHEDULE 13D/A ↗ |
| Apr 2, 2026 | SCHEDULE 13D/A (amended) | ZSTK ZeroStack Corp. | Michael Heinrich | 471,208 | 10.0% | SCHEDULE 13D/A ↗ |
| Dec 23, 2025 | SCHEDULE 13D/A (amended) | ZSTK ZeroStack Corp. | Zero Gravity Labs Inc. | 4.90M | 85.3% | SCHEDULE 13D/A ↗ |
| Dec 23, 2025 | SCHEDULE 13D/A (amended) | ZSTK ZeroStack Corp. | Michael Heinrich | 5.37M | 86.4% | SCHEDULE 13D/A ↗ |
| Dec 23, 2025 | SCHEDULE 13D/A (amended) | ZSTK ZeroStack Corp. | Vaiman Dany | 263,249 | 23.8% | SCHEDULE 13D/A ↗ |
| Dec 23, 2025 | SCHEDULE 13D/A (amended) | ZSTK ZeroStack Corp. | Daniel Reis-Faria | 6.43M | 88.3% | SCHEDULE 13D/A ↗ |
| Oct 27, 2025 | SCHEDULE 13D | ZSTK ZeroStack Corp. | Zero Gravity Labs Inc. | 4.90M | 87.0% | SCHEDULE 13D ↗ |
| Oct 27, 2025 | SCHEDULE 13D | ZSTK ZeroStack Corp. | Michael Heinrich | 4.90M | 87.0% | SCHEDULE 13D ↗ |
| Oct 10, 2025 | SCHEDULE 13D | ZSTK ZeroStack Corp. | Daniel Reis-Faria | 5.95M | 89.3% | SCHEDULE 13D ↗ |
| Aug 14, 2025 | SCHEDULE 13G/A (amended) | ZSTK ZeroStack Corp. | Highbridge Capital Management, LLC | 1.04M | 4.4% | SCHEDULE 13G/A ↗ |
| Jul 21, 2025 | SCHEDULE 13D/A (amended) | ZSTK ZeroStack Corp. | Clifford Starke | 3.85M | 17.1% | SCHEDULE 13D/A ↗ |
| Jul 21, 2025 | SCHEDULE 13D/A (amended) | ZSTK ZeroStack Corp. | Vaiman Dany | 1.08M | 4.8% | SCHEDULE 13D/A ↗ |
| May 2, 2025 | SCHEDULE 13G | ZSTK ZeroStack Corp. | Highbridge Capital Management, LLC | 1.04M | 5.1% | SCHEDULE 13G ↗ |
| Apr 29, 2025 | SCHEDULE 13G/A (amended) | ZSTK ZeroStack Corp. | Martin D. Hoe | 374,065 | 1.9% | SCHEDULE 13G/A ↗ |
| Apr 29, 2025 | SCHEDULE 13G/A (amended) | ZSTK ZeroStack Corp. | Ryan M. Lane | 374,065 | 1.9% | SCHEDULE 13G/A ↗ |
| Apr 29, 2025 | SCHEDULE 13G/A (amended) | ZSTK ZeroStack Corp. | Empery Asset Management, LP | 374,065 | 1.9% | SCHEDULE 13G/A ↗ |
| Jan 21, 2025 | SCHEDULE 13G | ZSTK ZeroStack Corp. | Martin D. Hoe | 926,361 | 5.4% | SCHEDULE 13G ↗ |
| Jan 21, 2025 | SCHEDULE 13G | ZSTK ZeroStack Corp. | Ryan M. Lane | 926,361 | 5.4% | SCHEDULE 13G ↗ |
| Jan 21, 2025 | SCHEDULE 13G | ZSTK ZeroStack Corp. | Empery Asset Management, LP | 926,361 | 5.4% | SCHEDULE 13G ↗ |
46 items, most recent first (up to 50). Every row links to its original filing. Updated Nov 15, 2026, 6:46 PM EST.
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