Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in KRRO held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | Lynx1 Capital Management LP | 1.5M | $17.4M | +126.9% | 15.455% | 2.75% |
| 2 | NEA Management Company, LLC | 1.3M | $14.7M | +19.0% | 13.040% | 0.84% |
| 3 | Atlas Venture Life Science Advisors, LLC | 1.1M | $12.9M | 0.0% | 11.425% | 1.63% |
| 4 | BALYASNY ASSET MANAGEMENT LLC | 1.0M | $11.8M | β | 10.449% | 0.04% |
| 5 | VR Adviser, LLC | 1.0M | $11.4M | β | 10.142% | 0.43% |
| 6 | Affinity Asset Advisors, LLC | 707K | $8.0M | β | 7.102% | 0.47% |
| 7 | Nantahala Capital Management, LLC | 660K | $7.5M | +10.0% | 6.631% | 0.38% |
| 8 | ADAR1 Capital Management, LLC | 540K | $6.1M | β | 5.426% | 0.38% |
| 9 | BlackRock, Inc. | 460K | $5.2M | +0.6% | 4.622% | 0.00% |
| 10 | DRIEHAUS CAPITAL MANAGEMENT LLC | 450K | $5.1M | β | 4.521% | 0.04% |
| 11 | TCG Crossover Management, LLC | 416K | $4.7M | 0.0% | 4.183% | 0.13% |
| 12 | Siren, L.L.C. | 348K | $3.9M | 0.0% | 3.494% | 0.11% |
| 13 | VANGUARD CAPITAL MANAGEMENT LLC | 311K | $3.5M | β | 3.124% | 0.00% |
| 14 | 72 Investment Holdings, LLC | 277K | $3.1M | 0.0% | 2.781% | 6.32% |
| 15 | AQR CAPITAL MANAGEMENT LLC | 268K | $3.0M | +558.7% | 2.690% | 0.00% |
| 16 | ADAGE CAPITAL PARTNERS GP, L.L.C. | 228K | $2.6M | β | 2.295% | 0.00% |
| 17 | GEODE CAPITAL MANAGEMENT, LLC | 174K | $2.0M | +6.7% | 1.745% | 0.00% |
| 18 | TWO SIGMA INVESTMENTS, LP | 165K | $1.9M | +109.5% | 1.663% | 0.00% |
| 19 | VANGUARD PORTFOLIO MANAGEMENT LLC | 149K | $1.7M | β | 1.493% | 0.00% |
| 20 | STATE STREET CORP | 140K | $1.6M | -4.0% | 1.410% | 0.00% |
| 21 | RENAISSANCE TECHNOLOGIES LLC | 136K | $1.5M | +81.9% | 1.369% | 0.00% |
| 22 | MILLENNIUM MANAGEMENT LLC | 64K | $720K | -60.5% | 0.639% | 0.00% |
| 23 | F/M Investments LLC | 63K | $712K | -4.1% | 0.632% | 0.05% |
| 24 | EMERALD MUTUAL FUND ADVISERS TRUST | 63K | $712K | -4.1% | 0.632% | 0.03% |
| 25 | XTX Topco Ltd | 60K | $685K | +6.0% | 0.608% | 0.01% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). β% of Fundβ shows how much of that investorβs total 13F portfolio is invested in KRRO β a direct measure of their conviction.
Filings activity in KRRO during Q1 2026, grouped by how each filer changed its position.
Institutions that opened a new KRRO position in Q1 2026
Institutions that fully closed their KRRO position in Q1 2026
8 quarters of 13F filings Β· Ξ columns show change vs prior quarter
| Quarter | Inst. Holders | Ξ Holders | Ownership % | Ξ Ownership | Total 13F Value | Ξ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 93 | +12% | 121.52% | +62.18 pp | $140M | +105% |
| Q4 2025 | 83 | 6.7% | 59.34% | 140.65 pp | $69M | 85% |
| Q3 2025 | 89 | +25% | 199.99% | +100.69 pp | $465M | +305% |
| Q2 2025 | 71 | 6.6% | 99.30% | 46.75 pp | $115M | 32% |
| Q1 2025 | 76 | 11% | 146.05% | 53.94 pp | $169M | 53% |
| Q4 2024 | 85 | +18% | 199.99% | +0.00 pp | $359M | +27% |
| Q3 2024 | 72 | +13% | 199.99% | +0.00 pp | $284M | +0.3% |
| Q2 2024 | 64 | β | 199.99% | β | $283M | β |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Ξ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying KRRO stock.
Based on Q1 2026 13F filings, institutional ownership of Korro Bio, Inc. stands at 121.5%, held across 93 reporting institutions.
Lynx1 Capital Management LP is the largest reported institutional holder of KRRO, with approximately 1,538,296 shares worth $0.02B as of Q1 2026.
Yes β 3 widely-followed marquee investors appear among the top 25 institutional holders of KRRO, including TWO SIGMA INVESTMENTS, LP, RENAISSANCE TECHNOLOGIES LLC, MILLENNIUM MANAGEMENT LLC.
Our composite Smart Money Score for KRRO is 74 out of 100 (Bullish). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
30 institutions opened new positions in KRRO during Q1 2026, while 20 fully exited. 54 added to existing positions and 8 trimmed.
KRRO institutional ownership rose by 62.18 percentage points quarter-over-quarter, with a net change of +10 holders.
The top 10 institutions account for 71.3% of all reported 13F value in KRRO, and the top 25 account for 94.3%.
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.
Korro Bio, Inc. (KRRO) Institutional Ownership