As of November 4, 2026, 3 holders' latest Schedule 13D or 13G filings report owning 5% or more of Apartment Invt & Mgmt Co -A. The largest reported stake is Madison Avenue International LP's, at 8.6%. 12 filings are on record since July 18, 2025 (Schedule 13G, March 4, 2026).
Sell to companies like Apartment Invt & Mgmt Co -A? Enter your website and see 10 with a filed reason to buy from you this month. Free.
Opens in a new tab. No signup.
Key facts
- · Reporting person: T. Rowe Price Associates, Inc. · Sole voting: 5,040,993 · Shared voting: 0 · Sole dispositive: 5,048,394 · Shared dispositive: 0 · SCHEDULE 13G/A, 2026-10-07
- · 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
Apartment Invt & Mgmt Co -A has 12 Schedule 13D or 13G filings on record since 2025-07-18. 3 holders' latest filing reports 5% or more of reit. 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 |
| T. Rowe Price Associates, Inc. | 3.5% | 5,048,394 | SCHEDULE 13G/A, 2026-10-07 | 2026-09-30 |
| 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 |
Holding shares or following this stake? See who's behind Apartment Invt & Mgmt Co -A and the warning signs.
Free to see. No signup.
Keep reading
More on Apartment Invt & Mgmt Co -A and the records around it.
Apartment Invt & Mgmt Co -A elsewhere on the record
- Leadership changes Oct 2026
- Who owns it
Companies that share a holder
- Silver Point Capital, L.P. also filed stake reports on 9 other companies: Smart Share Global Limited (Aug 2026), Keenova Therapeutics plc (May 2026), Cool Company Ltd. (May 2026)
- Weiss Asset Management LP also filed stake reports on 9 other companies: Theravance Biopharma, Inc. (Sep 2026), RE/MAX Holdings, Inc. (Aug 2026), Canaan Inc. (Aug 2026)
- Madison Avenue International LP also filed stake reports on 11 other companies: Ultragenyx Pharmaceutical Inc. (Oct 2026), Graham Holdings Co (Aug 2026), STAAR SURGICAL CO (Aug 2026)
Watch Apartment Invt & Mgmt Co -A
Get an email when Apartment Invt & Mgmt Co -A files again: a new raise, a leadership change, a layoff or an IPO filing. One email first to confirm; nothing else until you click it. At most one a day, one click to stop. Free for up to 3 companies.
Want the whole picture on Apartment Invt & Mgmt Co -A?
Example from a real report (our sample on Target): “In March 2026, Target announced a planned incremental $1 billion operating investment” Source: Target Corporation (press release)
A Full Report on Apartment Invt & Mgmt Co -A: verified, sourced, every claim cited, ready in a few minutes. See pricing.
What the Full Report on Apartment Invt & Mgmt Co -A covers
The Short Answer
Which Company This Is
What They Do, And How The Money Works
Who Runs It, And How To Reach Them
The Money: Funding, Valuation, Runway
Who Pays Them, And Who They Are Up Against
Warning Bells
Sources
13 cited sources found
Plus the sections for what you are deciding, which you pick after ordering.
A real finished report, first screen. Opens in a new tab.
Not ready to order yet? Keep this snapshot.
Sends this preview to you once; we won't add you to any list
Voting and dispositive power, as filed
| Reporting person | Sole voting | Shared voting | Sole dispositive | Shared dispositive | Filing |
|---|---|---|---|---|---|
| T. Rowe Price Associates, Inc. | 5,040,993 | 0 | 5,048,394 | 0 | SCHEDULE 13G/A, 2026-10-07 |
The latest filing identifies Apartment Invt & Mgmt Co -A by CUSIP 03748R747 and gives its principal executive office as 4582 SOUTH ULSTER STREET, SUITE 1450, DENVER, CO 80237 (SCHEDULE 13G/A, 2026-10-07).
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 |
| 2026-10-07 | T. Rowe Price Associates, Inc. | 3.5% | SCHEDULE 13G/A |
Questions about who owns Apartment Invt & Mgmt Co -A
Who owns Apartment Invt & Mgmt Co -A?
On this page, 3 holders' latest ownership filings report 5% or more of Apartment Invt & Mgmt Co -A: Madison Avenue International LP (8.6%, Schedule 13G, filed 2026-03-04), Newtyn Management, LLC (8.1%, Schedule 13G/A, filed 2026-03-25) and Weiss Asset Management LP (5.7%, Schedule 13G, filed 2026-05-11).
Who are the largest shareholders of Apartment Invt & Mgmt Co -A?
By the share each holder's latest filing reports, the largest holders of Apartment Invt & Mgmt Co -A on this page are Madison Avenue International LP (8.6%), Newtyn Management, LLC (8.1%) and Weiss Asset Management LP (5.7%).
When did Madison Avenue International LP buy into Apartment Invt & Mgmt Co -A?
The filings give report dates, not purchase dates. The earliest filing from Madison Avenue International LP on this page is the Schedule 13G, filed 2026-03-04, reporting 8.6%.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 12 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
Also on the record for Apartment Invt & Mgmt Co -A
| Date | Record | Figure | Our page | Source |
|---|---|---|---|---|
| October 2, 2026 | Leadership change: Jennifer Johnson departs, Chief Administrative Officer | — | Leadership changes | Source |
Tools for this story
Each opens in a new tab, filled in for Apartment Invt & Mgmt Co -A. With no account yet, you sign up free and land on the result.
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.