Ranked by reported Q2 2026 13F market value
Share of total reported institutional value in KROS held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 2.8M | $29.9M | +15.9% | 8.732% | 0.00% |
| 2 | Nantahala Capital Management, LLC | 1.4M | $15.1M | +3.7% | 4.408% | 0.25% |
| 3 | AQR CAPITAL MANAGEMENT LLC | 968K | $10.4M | +138.1% | 3.025% | 0.00% |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | 834K | $8.9M | +0.3% | 2.605% | 0.00% |
| 5 | ORBIMED ADVISORS LLC | 759K | $8.1M | 0.0% | 2.373% | 0.15% |
| 6 | FEDERATED HERMES, INC. | 700K | $7.5M | +1.6% | 2.189% | 0.01% |
| 7 | VANGUARD PORTFOLIO MANAGEMENT LLC | 653K | $7.0M | -4.3% | 2.040% | 0.00% |
| 8 | MACKENZIE FINANCIAL CORP | 628K | $6.7M | +312.2% | 1.964% | 0.01% |
| 9 | Madison Avenue Partners, LP | 627K | $6.7M | 0.0% | 1.958% | 0.29% |
| 10 | Qube Research & Technologies Ltd | 609K | $6.5M | -16.0% | 1.903% | 0.01% |
| 11 | JACOBS LEVY EQUITY MANAGEMENT, INC | 605K | $6.5M | -14.2% | 1.892% | 0.02% |
| 12 | STATE STREET CORP | 541K | $5.8M | -3.7% | 1.691% | 0.00% |
| 13 | GEODE CAPITAL MANAGEMENT, LLC | 511K | $5.5M | -25.0% | 1.597% | 0.00% |
| 14 | DIMENSIONAL FUND ADVISORS LP | 461K | $4.9M | +43.3% | 1.439% | 0.00% |
| 15 | CITADEL ADVISORS LLC | 410K | $4.4M | -25.9% | 1.283% | 0.00% |
| 16 | RENAISSANCE TECHNOLOGIES LLC | 359K | $3.8M | -20.8% | 1.122% | 0.01% |
| 17 | D. E. Shaw & Co., Inc. | 267K | $2.9M | -47.5% | 0.836% | 0.00% |
| 18 | BRIDGEWAY CAPITAL MANAGEMENT, LLC | 265K | $2.8M | +35.9% | 0.828% | 0.05% |
| 19 | Nuveen, LLC | 248K | $2.7M | -5.5% | 0.774% | 0.00% |
| 20 | ADAR1 Capital Management, LLC | 247K | $2.6M | +153.6% | 0.771% | 0.12% |
| 21 | TWO SIGMA INVESTMENTS, LP | 247K | $2.6M | -32.2% | 0.771% | 0.00% |
| 22 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 233K | $2.5M | -60.5% | 0.729% | 0.00% |
| 23 | MILLENNIUM MANAGEMENT LLC | 185K | $2.0M | +73.0% | 0.578% | 0.00% |
| 24 | GOLDMAN SACHS GROUP INC | 178K | $1.9M | -20.8% | 0.556% | 0.00% |
| 25 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 159K | $1.7M | -11.8% | 0.496% | 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 KROS — a direct measure of their conviction.
Filings activity in KROS 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 | 131 | 13% | 58.03% | 1.28 pp | $195M | 4.6% |
| Q1 2026 | 150 | 8.5% | 59.31% | 6.74 pp | $205M | 50% |
| Q4 2025 | 164 | +7.2% | 66.05% | 47.07 pp | $407M | 29% |
| Q3 2025 | 153 | +11% | 113.12% | 4.73 pp | $570M | +14% |
| Q2 2025 | 138 | 9.2% | 117.85% | +3.42 pp | $498M | +18% |
| Q1 2025 | 152 | 5.6% | 114.43% | 1.18 pp | $422M | 26% |
| Q4 2024 | 161 | 1.2% | 115.61% | +61.55 pp | $569M | 70% |
| Q3 2024 | 163 | — | 54.06% | — | $1.89B | — |
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 KROS stock.
Based on Q2 2026 13F filings, institutional ownership of Keros Therapeutics, Inc. stands at 58.0%, held across 131 reporting institutions.
BlackRock, Inc. is the largest reported institutional holder of KROS, with approximately 2,794,217 shares worth $0.03B as of Q2 2026.
Yes — 4 widely-followed marquee investors appear among the top 25 institutional holders of KROS, including CITADEL ADVISORS LLC, RENAISSANCE TECHNOLOGIES LLC, TWO SIGMA INVESTMENTS, LP, MILLENNIUM MANAGEMENT LLC.
Our composite Smart Money Score for KROS is 42 out of 100 (Neutral). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
14 institutions opened new positions in KROS during Q2 2026, while 29 fully exited. 40 added to existing positions and 75 trimmed.
KROS institutional ownership fell by 1.28 percentage points quarter-over-quarter, with a net change of -19 holders.
The top 10 institutions account for 54.7% of all reported 13F value in KROS, and the top 25 account for 81.6%.
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.
Keros Therapeutics, Inc. (KROS) Institutional Ownership