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 AMPL
| 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 6, 2026 | SCHEDULE 13G | AMPL Amplitude, Inc. | Abigail P. Johnson | 5.98M | 5.8% | SCHEDULE 13G ↗ |
| Aug 6, 2026 | SCHEDULE 13G | AMPL Amplitude, Inc. | FMR LLC | 5.98M | 5.8% | SCHEDULE 13G ↗ |
| Jul 27, 2026 | SCHEDULE 13G/A (amended) | AMPL Amplitude, Inc. | BlackRock, Inc. | 7.94M | 7.6% | SCHEDULE 13G/A ↗ |
| May 18, 2026 | SCHEDULE 13G/A (amended) | AMPL Amplitude, Inc. | AllianceBernstein L.P. | 317,618 | 0.3% | SCHEDULE 13G/A ↗ |
| Apr 28, 2026 | SCHEDULE 13G | AMPL Amplitude, Inc. | Vanguard Portfolio Management | 6.25M | 6.0% | SCHEDULE 13G ↗ |
| Apr 7, 2026 | SCHEDULE 13G | AMPL Amplitude, Inc. | Wellington Management Company LLP | 11.15M | 8.8% | SCHEDULE 13G ↗ |
| Apr 7, 2026 | SCHEDULE 13G | AMPL Amplitude, Inc. | Wellington Investment Advisors Holdings LLP | 11.15M | 10.7% | SCHEDULE 13G ↗ |
| Apr 7, 2026 | SCHEDULE 13G | AMPL Amplitude, Inc. | Wellington Group Holdings LLP | 11.15M | 10.7% | SCHEDULE 13G ↗ |
| Apr 7, 2026 | SCHEDULE 13G | AMPL Amplitude, Inc. | Wellington Management Group LLP | 11.15M | 10.7% | SCHEDULE 13G ↗ |
| Apr 7, 2026 | SCHEDULE 13G | AMPL Amplitude, Inc. | Wellington Management Company LLP | 11.15M | 8.8% | SCHEDULE 13G ↗ |
| Apr 7, 2026 | SCHEDULE 13G | AMPL Amplitude, Inc. | Wellington Investment Advisors Holdings LLP | 11.15M | 10.7% | SCHEDULE 13G ↗ |
| Apr 7, 2026 | SCHEDULE 13G | AMPL Amplitude, Inc. | Wellington Group Holdings LLP | 11.15M | 10.7% | SCHEDULE 13G ↗ |
| Apr 7, 2026 | SCHEDULE 13G | AMPL Amplitude, Inc. | Wellington Management Group LLP | 11.15M | 10.7% | SCHEDULE 13G ↗ |
| Mar 26, 2026 | SCHEDULE 13G/A (amended) | AMPL Amplitude, Inc. | The Vanguard Group | 0 | 0.0% | SCHEDULE 13G/A ↗ |
| Feb 17, 2026 | SCHEDULE 13G/A (amended) | AMPL Amplitude, Inc. | T. Rowe Price Investment Management, Inc. | 441 | 0.0% | SCHEDULE 13G/A ↗ |
| Jan 7, 2026 | SCHEDULE 13G/A (amended) | AMPL Amplitude, Inc. | The Vanguard Group | 10.83M | 10.4% | SCHEDULE 13G/A ↗ |
| Nov 14, 2025 | SCHEDULE 13G/A (amended) | AMPL Amplitude, Inc. | T. Rowe Price Investment Management, Inc. | 5.07M | 5.0% | SCHEDULE 13G/A ↗ |
| Nov 14, 2025 | SCHEDULE 13G | AMPL Amplitude, Inc. | AllianceBernstein L.P. | 6.03M | 5.9% | SCHEDULE 13G ↗ |
| Aug 11, 2025 | SCHEDULE 13G/A (amended) | AMPL Amplitude, Inc. | Jasmine Ventures Pte. Ltd. | 4.98M | 4.8% | SCHEDULE 13G/A ↗ |
| Aug 11, 2025 | SCHEDULE 13G/A (amended) | AMPL Amplitude, Inc. | GIC Special Investments Private Limited | 4.98M | 4.8% | SCHEDULE 13G/A ↗ |
| Aug 11, 2025 | SCHEDULE 13G/A (amended) | AMPL Amplitude, Inc. | GIC Private Ltd | 4.98M | 4.8% | SCHEDULE 13G/A ↗ |
| Aug 6, 2025 | SCHEDULE 13G/A (amended) | AMPL Amplitude, Inc. | Abigail P. Johnson | 3.29M | 3.3% | SCHEDULE 13G/A ↗ |
| Aug 6, 2025 | SCHEDULE 13G/A (amended) | AMPL Amplitude, Inc. | FMR LLC | 3.29M | 3.3% | SCHEDULE 13G/A ↗ |
| May 15, 2025 | SCHEDULE 13G/A (amended) | AMPL Amplitude, Inc. | Scott R. Tobin | 4.52M | 4.6% | SCHEDULE 13G/A ↗ |
| May 15, 2025 | SCHEDULE 13G/A (amended) | AMPL Amplitude, Inc. | Dharmesh Thakker | 4.45M | 4.5% | SCHEDULE 13G/A ↗ |
| May 15, 2025 | SCHEDULE 13G/A (amended) | AMPL Amplitude, Inc. | Chelsea R. Stoner | 4.61M | 4.7% | SCHEDULE 13G/A ↗ |
| May 15, 2025 | SCHEDULE 13G/A (amended) | AMPL Amplitude, Inc. | Roger H. Lee | 4.52M | 4.6% | SCHEDULE 13G/A ↗ |
| May 15, 2025 | SCHEDULE 13G/A (amended) | AMPL Amplitude, Inc. | Russell L. Fleischer | 4.53M | 4.6% | SCHEDULE 13G/A ↗ |
| May 15, 2025 | SCHEDULE 13G/A (amended) | AMPL Amplitude, Inc. | Jesse Feldman | 4.52M | 4.6% | SCHEDULE 13G/A ↗ |
| May 15, 2025 | SCHEDULE 13G/A (amended) | AMPL Amplitude, Inc. | Morad Elhafed | 372,948 | 0.4% | SCHEDULE 13G/A ↗ |
| May 15, 2025 | SCHEDULE 13G/A (amended) | AMPL Amplitude, Inc. | Michael M. Brown | 4.63M | 4.7% | SCHEDULE 13G/A ↗ |
| May 15, 2025 | SCHEDULE 13G/A (amended) | AMPL Amplitude, Inc. | Neeraj Agrawal | 4.67M | 4.7% | SCHEDULE 13G/A ↗ |
| May 15, 2025 | SCHEDULE 13G/A (amended) | AMPL Amplitude, Inc. | Battery Partners Select Fund I GP, LLC | 363,479 | 0.4% | SCHEDULE 13G/A ↗ |
| May 15, 2025 | SCHEDULE 13G/A (amended) | AMPL Amplitude, Inc. | Battery Investment Partners Select Fund I, L.P. | 35,713 | 0.0% | SCHEDULE 13G/A ↗ |
| May 15, 2025 | SCHEDULE 13G/A (amended) | AMPL Amplitude, Inc. | Battery Partners Select Fund I, L.P. | 327,766 | 0.3% | SCHEDULE 13G/A ↗ |
| May 15, 2025 | SCHEDULE 13G/A (amended) | AMPL Amplitude, Inc. | Battery Ventures Select Fund I, L.P. | 327,766 | 0.3% | SCHEDULE 13G/A ↗ |
| May 15, 2025 | SCHEDULE 13G/A (amended) | AMPL Amplitude, Inc. | Battery Partners XI Side Fund, LLC | 2.01M | 2.0% | SCHEDULE 13G/A ↗ |
| May 15, 2025 | SCHEDULE 13G/A (amended) | AMPL Amplitude, Inc. | Battery Partners XI, LLC | 2.08M | 2.1% | SCHEDULE 13G/A ↗ |
| May 15, 2025 | SCHEDULE 13G/A (amended) | AMPL Amplitude, Inc. | Battery Investment Partners XI, LLC | 73,579 | 0.1% | SCHEDULE 13G/A ↗ |
| May 15, 2025 | SCHEDULE 13G/A (amended) | AMPL Amplitude, Inc. | Battery Ventures XI-B Side Fund, L.P. | 357,671 | 0.4% | SCHEDULE 13G/A ↗ |
| May 15, 2025 | SCHEDULE 13G/A (amended) | AMPL Amplitude, Inc. | Battery Ventures XI-A Side Fund, L.P. | 1.65M | 1.7% | SCHEDULE 13G/A ↗ |
| May 15, 2025 | SCHEDULE 13G/A (amended) | AMPL Amplitude, Inc. | Battery Ventures XI-B, L.P. | 419,490 | 0.4% | SCHEDULE 13G/A ↗ |
| May 15, 2025 | SCHEDULE 13G/A (amended) | AMPL Amplitude, Inc. | Battery Ventures XI-A, L.P. | 1.59M | 1.6% | SCHEDULE 13G/A ↗ |
| May 12, 2025 | SCHEDULE 13G/A (amended) | AMPL Amplitude, Inc. | Abigail P. Johnson | 7.31M | 7.6% | SCHEDULE 13G/A ↗ |
| May 12, 2025 | SCHEDULE 13G/A (amended) | AMPL Amplitude, Inc. | FMR LLC | 7.31M | 7.6% | SCHEDULE 13G/A ↗ |
| Feb 25, 2025 | SCHEDULE 13D/A (amended) | AMPL Amplitude, Inc. | Roelof Botha ("RB") | 2.55M | 2.6% | SCHEDULE 13D/A ↗ |
| Feb 25, 2025 | SCHEDULE 13D/A (amended) | AMPL Amplitude, Inc. | Douglas Leone ("DL") | 2.55M | 2.6% | SCHEDULE 13D/A ↗ |
| Feb 25, 2025 | SCHEDULE 13D/A (amended) | AMPL Amplitude, Inc. | SC US (TTGP), Ltd. ("SC US (TTGP)") | 10.22M | 9.9% | SCHEDULE 13D/A ↗ |
| Feb 25, 2025 | SCHEDULE 13D/A (amended) | AMPL Amplitude, Inc. | SC U.S. Growth IX Management, L.P. ("SC U.S. Growth IX Management") | 2.56M | 2.7% | SCHEDULE 13D/A ↗ |
| Feb 25, 2025 | SCHEDULE 13D/A (amended) | AMPL Amplitude, Inc. | SC U.S. Venture 2010 Management, L.P. ("Usv 2010 Management") | 235,201 | 0.2% | SCHEDULE 13D/A ↗ |
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