Key facts
- · Holder: Vanguard Portfolio Management · Percent: 4.08% · SCHEDULE 13G/A
- · Holder: Weiss Asset Management LP · Percent: 5.7% · SCHEDULE 13G
- · Holder: Vanguard Portfolio Management · Percent: 5.97% · SCHEDULE 13G
- · Holder: BlackRock, Inc. · Percent: 0.4% · SCHEDULE 13G/A
- · Holder: The Vanguard Group · Percent: 0% · SCHEDULE 13G/A
Apartment Investment and Management Co has 11 Schedule 13D or 13G filings on record since 2025-07-18. 3 holders' latest filing reports 5% or more of common stock. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| Madison Avenue International LP | 8.6% | 12,347,991 | SCHEDULE 13G, 2026-03-04 | 2026-02-26 |
| Newtyn Management, LLC | 8.1% | 11,600,000 | SCHEDULE 13G/A, 2026-03-25 | 2026-03-18 |
| Weiss Asset Management LP | 5.7% | 8,150,456 | SCHEDULE 13G, 2026-05-11 | 2026-03-31 |
| Vanguard Portfolio Management | 4.08% | 5,878,027 | SCHEDULE 13G/A, 2026-07-31 | 2026-06-30 |
| Millennium Management LLC | 3.1% | 4,440,885 | SCHEDULE 13G/A, 2025-10-24 | 2025-09-30 |
| Silver Point Capital, L.P. | 1.2% | 1,759,272 | SCHEDULE 13G, 2026-02-17 | 2025-12-31 |
| BlackRock, Inc. | 0.4% | 570,866 | SCHEDULE 13G/A, 2026-04-27 | 2026-03-31 |
| The Vanguard Group | 0% | 0 | SCHEDULE 13G/A, 2026-03-26 | 2026-03-13 |
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The Short Answer
Which Company This Is
What They Do, And How The Money Works
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Warning Bells
Sources
11 cited sources found
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Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-07-18 | BlackRock, Inc. | 9.4% | SCHEDULE 13G/A |
| 2025-10-24 | Millennium Management LLC | 3.1% | SCHEDULE 13G/A |
| 2025-11-14 | Newtyn Management, LLC | 5.5% | SCHEDULE 13G |
| 2026-02-17 | Silver Point Capital, L.P. | 1.2% | SCHEDULE 13G |
| 2026-03-04 | Madison Avenue International LP | 8.6% | SCHEDULE 13G |
| 2026-03-25 | Newtyn Management, LLC | 8.1% | SCHEDULE 13G/A |
| 2026-03-26 | The Vanguard Group | 0% | SCHEDULE 13G/A |
| 2026-04-27 | BlackRock, Inc. | 0.4% | SCHEDULE 13G/A |
| 2026-04-28 | Vanguard Portfolio Management | 5.97% | SCHEDULE 13G |
| 2026-05-11 | Weiss Asset Management LP | 5.7% | SCHEDULE 13G |
| 2026-07-31 | Vanguard Portfolio Management | 4.08% | SCHEDULE 13G/A |
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Where this comes from
Anyone who comes to own more than 5% of a class of a listed company's voting shares has to tell the SEC. A holder who may seek to change or influence the company files Schedule 13D, and has to say in Item 4, "Purpose of Transaction", what it intends to do. A holder with no such intent, such as many index and passive funds, may file the shorter Schedule 13G. Both are amended when the stake changes, including when it falls below 5%.
Every row here is one of those filings, linked to the filing itself. Percentages and share counts are exactly as the holder filed them, for the holder the filing names; an amendment showing a lower figure is shown as filed. Item 4 text is quoted word for word. Where a 13D's Item 4 contains a sentence stating a definite intent to influence the company, that sentence is marked and quoted; the page does not describe the holder or its motives beyond the words it filed. Nothing here is investment advice.