Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in IWM held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 62.3M | $15.44B | +4.5% | — | 1.73% |
| 2 | MILLENNIUM MANAGEMENT LLC | 52.8M | $13.10B | — | — | 8.70% |
| 3 | BARCLAYS PLC | 47.1M | $11.69B | — | — | 4.80% |
| 4 | BANK OF AMERICA CORP /DE/ | 41.6M | $10.32B | -4.9% | — | 0.75% |
| 5 | CITIGROUP INC | 34.2M | $8.49B | +21.8% | — | 3.62% |
| 6 | GOLDMAN SACHS GROUP INC | 30.2M | $7.50B | +49.7% | — | 0.86% |
| 7 | MORGAN STANLEY | 29.8M | $7.38B | +73.8% | — | 0.44% |
| 8 | WELLS FARGO & COMPANY/MN | 24.4M | $6.05B | — | — | 1.32% |
| 9 | ROYAL BANK OF CANADA | 23.0M | $5.71B | -13.4% | — | 1.00% |
| 10 | UBS Group AG | 18.3M | $4.54B | -15.1% | — | 0.68% |
| 11 | BNP PARIBAS ARBITRAGE, SA | 6.3M | $4.42B | +23.9% | — | 2.15% |
| 12 | BANK OF MONTREAL /CAN/ | 16.9M | $4.18B | +60.7% | — | 1.58% |
| 13 | TORONTO DOMINION BANK | 10.8M | $2.67B | +5743.7% | — | 3.84% |
| 14 | Empower Advisory Group, LLC | 8.6M | $2.13B | +1.4% | — | 5.53% |
| 15 | Walleye Trading LLC | 6.9M | $1.72B | +28.3% | — | 4.35% |
| 16 | Belvedere Trading LLC | 5.7M | $1.41B | -18.3% | — | 2.11% |
| 17 | HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | 4.7M | $1.17B | -4.0% | — | 1.92% |
| 18 | NORTHERN TRUST CORP | 4.1M | $1.03B | -2.5% | — | 0.14% |
| 19 | TCM Advisors, LLC | 4.0M | $999.3M | -2.5% | — | 73.80% |
| 20 | Jain Global LLC | 4.0M | $989.7M | — | — | 4.83% |
| 21 | LPL Financial LLC | 3.8M | $931.8M | -49.6% | — | 0.25% |
| 22 | Rafferty Asset Management, LLC | 3.7M | $907.0M | -26.5% | — | 3.68% |
| 23 | US BANCORP \DE\ | 3.5M | $859.5M | +50.0% | — | 1.04% |
| 24 | PNC FINANCIAL SERVICES GROUP, INC. | 3.2M | $790.5M | +6.6% | — | 0.46% |
| 25 | FMR LLC | 2.9M | $727.6M | +33.8% | — | 0.04% |
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 IWM — a direct measure of their conviction.
Filings activity in IWM during Q1 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 |
|---|---|---|---|---|---|---|
| Q1 2026 | 2,509 | +0.1% | — | — | $140.63B | +34% |
| Q4 2025 | 2,507 | +6.5% | — | — | $104.62B | 36% |
| Q3 2025 | 2,354 | +2.1% | — | — | $164.67B | +6.8% |
| Q2 2025 | 2,306 | +1.2% | — | — | $154.18B | +30% |
| Q1 2025 | 2,279 | 5.2% | — | — | $118.24B | 1.9% |
| Q4 2024 | 2,405 | +11% | — | — | $120.52B | 15% |
| Q3 2024 | 2,166 | +4.3% | — | — | $142.35B | +20% |
| Q2 2024 | 2,076 | — | — | — | $118.68B | — |
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 IWM stock.
Based on Q1 2026 13F filings, institutional ownership of iShares Russell 2000 ETF stands at not currently reported, held across 2,509 reporting institutions.
SUSQUEHANNA INTERNATIONAL GROUP, LLP is the largest reported institutional holder of IWM, with approximately 62,259,960 shares worth $15.44B as of Q1 2026.
Yes — 2 widely-followed marquee investors appear among the top 25 institutional holders of IWM, including SUSQUEHANNA INTERNATIONAL GROUP, LLP, MILLENNIUM MANAGEMENT LLC.
Our composite Smart Money Score for IWM is 55 out of 100 (Neutral). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
237 institutions opened new positions in IWM during Q1 2026, while 235 fully exited. 1,416 added to existing positions and 837 trimmed.
Quarter-over-quarter ownership change for IWM is not yet available — at least two quarters of 13F data are required.
The top 10 institutions account for 64.1% of all reported 13F value in IWM, and the top 25 account for 81.9%.
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.
iShares Russell 2000 ETF (IWM) Institutional Ownership