Ranked by reported Q2 2026 13F market value
Share of total reported institutional value in AIV held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | Madison Avenue Partners, LP | 12.4M | $36.8M | 0.0% | 8.602% | 1.58% |
| 2 | Newtyn Management, LLC | 12.2M | $36.2M | 0.0% | 8.481% | 4.52% |
| 3 | Weiss Asset Management LP | 8.2M | $24.2M | 0.0% | 5.666% | 0.25% |
| 4 | Owl Creek Asset Management, L.P. | 5.9M | $17.6M | +96.1% | 4.120% | 1.46% |
| 5 | VANGUARD PORTFOLIO MANAGEMENT LLC | 5.9M | $17.5M | -31.6% | 4.086% | 0.00% |
| 6 | TWO SIGMA INVESTMENTS, LP | 4.7M | $14.0M | +487.5% | 3.287% | 0.01% |
| 7 | VANGUARD CAPITAL MANAGEMENT LLC | 4.5M | $13.4M | -4.0% | 3.131% | 0.00% |
| 8 | MANGROVE PARTNERS IM, LLC | 4.5M | $13.2M | — | 3.100% | 0.87% |
| 9 | BlackRock, Inc. | 3.8M | $11.4M | +30.7% | 2.675% | 0.00% |
| 10 | Qube Research & Technologies Ltd | 3.2M | $9.5M | +80.5% | 2.219% | 0.01% |
| 11 | SummitTX Capital, L.P. | 2.3M | $6.9M | +14.8% | 1.604% | 0.18% |
| 12 | 683 Capital Management, LLC | 2.1M | $6.2M | +44.8% | 1.460% | 0.31% |
| 13 | Zimmer Partners, LP | 2.0M | $6.0M | 0.0% | 1.409% | 0.14% |
| 14 | LANDMARK INVESTMENT PARTNERS, L.P. | 2.0M | $5.1M | -22.5% | 1.378% | 1.29% |
| 15 | Verition Fund Management LLC | 1.7M | $5.0M | 0.0% | 1.165% | 0.01% |
| 16 | LPL Financial LLC | 1.6M | $4.9M | +218.8% | 1.135% | 0.00% |
| 17 | Irenic Capital Management LP | 1.4M | $4.2M | -72.2% | 0.972% | 0.20% |
| 18 | DLD Asset Management, LP | 1.3M | $3.8M | +19.3% | 0.888% | 0.25% |
| 19 | TUDOR INVESTMENT CORP ET AL | 1.1M | $3.4M | +151.8% | 0.799% | 0.00% |
| 20 | Union Square Park Capital Management, LLC | 1.1M | $3.3M | 0.0% | 0.782% | 1.20% |
| 21 | Meros Investment Management, LP | 967K | $2.9M | -0.1% | 0.672% | 0.91% |
| 22 | JANE STREET GROUP, LLC | 857K | $2.5M | -59.1% | 0.595% | 0.00% |
| 23 | Alberta Investment Management Corp | 850K | $2.5M | 0.0% | 0.591% | 0.01% |
| 24 | CITADEL ADVISORS LLC | 835K | $2.5M | +85.4% | 0.581% | 0.00% |
| 25 | STATE STREET CORP | 721K | $2.1M | +34.5% | 0.501% | 0.00% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in AIV — a direct measure of their conviction.
Filings activity in AIV during Q2 2026, grouped by how each filer changed its position.
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q2 2026 | 152 | 17% | 83.72% | 0.94 pp | $293M | 26% |
| Q1 2026 | 183 | 13% | 84.66% | 7.03 pp | $396M | 39% |
| Q4 2025 | 210 | +1.0% | 91.69% | 2.49 pp | $644M | 28% |
| Q3 2025 | 208 | 0.5% | 94.18% | +0.39 pp | $890M | 3.3% |
| Q2 2025 | 209 | +0.0% | 93.79% | +2.92 pp | $921M | +1.8% |
| Q1 2025 | 209 | +5.6% | 90.87% | +0.53 pp | $905M | 1.3% |
| Q4 2024 | 198 | +4.2% | 90.34% | +4.61 pp | $917M | +5.8% |
| Q3 2024 | 190 | — | 85.73% | — | $867M | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying AIV stock.
Based on Q2 2026 13F filings, institutional ownership of Apartment Investment and Management Company stands at 83.7%, held across 152 reporting institutions.
Madison Avenue Partners, LP is the largest reported institutional holder of AIV, with approximately 12,374,991 shares worth $0.04B as of Q2 2026.
Yes — 4 widely-followed marquee investors appear among the top 25 institutional holders of AIV, including TWO SIGMA INVESTMENTS, LP, LANDMARK INVESTMENT PARTNERS, L.P., JANE STREET GROUP, LLC, CITADEL ADVISORS LLC.
Our composite Smart Money Score for AIV is 41 out of 100 (Neutral). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
16 institutions opened new positions in AIV during Q2 2026, while 44 fully exited. 20 added to existing positions and 112 trimmed.
AIV institutional ownership fell by 0.94 percentage points quarter-over-quarter, with a net change of -31 holders.
The top 10 institutions account for 66.2% of all reported 13F value in AIV, and the top 25 account for 87.1%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Apartment Investment and Management Company (AIV) Institutional Ownership