Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in RNAC held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | Squarepoint Ops LLC | 2.2M | $13.8M | +12190.6% | 7.619% | 0.02% |
| 2 | FMR LLC | 800K | $4.9M | -41.5% | 2.722% | 0.00% |
| 3 | BlackRock, Inc. | 599K | $3.7M | -1.7% | 2.039% | 0.00% |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | 408K | $2.5M | β | 1.387% | 0.00% |
| 5 | 683 Capital Management, LLC | 330K | $2.0M | +17.9% | 1.123% | 0.16% |
| 6 | MILLENNIUM MANAGEMENT LLC | 284K | $1.7M | +73.0% | 0.968% | 0.00% |
| 7 | GEODE CAPITAL MANAGEMENT, LLC | 264K | $1.6M | +3.2% | 0.898% | 0.00% |
| 8 | MARSHALL WACE, LLP | 251K | $1.5M | +41.0% | 0.855% | 0.00% |
| 9 | Erste Asset Management GmbH | 222K | $1.3M | -18.4% | 0.755% | 0.01% |
| 10 | STATE STREET CORP | 200K | $1.2M | +0.7% | 0.682% | 0.00% |
| 11 | Privium Fund Management B.V. | 179K | $1.1M | +3.8% | 0.610% | 0.23% |
| 12 | TWO SIGMA INVESTMENTS, LP | 167K | $1.0M | +83.3% | 0.570% | 0.00% |
| 13 | UBS Group AG | 137K | $842K | +103.2% | 0.466% | 0.00% |
| 14 | CITADEL ADVISORS LLC | 110K | $677K | +38.0% | 0.375% | 0.00% |
| 15 | JACOBS LEVY EQUITY MANAGEMENT, INC | 102K | $624K | +6.0% | 0.346% | 0.00% |
| 16 | NORTHERN TRUST CORP | 92K | $566K | +5.7% | 0.313% | 0.00% |
| 17 | AQR CAPITAL MANAGEMENT LLC | 84K | $517K | β | 0.286% | 0.00% |
| 18 | VANGUARD FIDUCIARY TRUST CO | 70K | $432K | β | 0.239% | 0.00% |
| 19 | RENAISSANCE TECHNOLOGIES LLC | 67K | $414K | +63.7% | 0.229% | 0.00% |
| 20 | VANGUARD PORTFOLIO MANAGEMENT LLC | 61K | $373K | β | 0.206% | 0.00% |
| 21 | Diametric Capital, LP | 38K | $234K | β | 0.130% | 0.06% |
| 22 | Nuveen, LLC | 37K | $230K | +52.9% | 0.128% | 0.00% |
| 23 | GOLDMAN SACHS GROUP INC | 31K | $190K | β | 0.105% | 0.00% |
| 24 | XTX Topco Ltd | 30K | $185K | +193.6% | 0.102% | 0.00% |
| 25 | EverSource Wealth Advisors, LLC | 4K | $173K | +62733.3% | 0.013% | 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 RNAC β a direct measure of their conviction.
Filings activity in RNAC during Q1 2026, grouped by how each filer changed its position.
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 | 81 | +21% | 15.69% | +2.57 pp | $44M | +20% |
| Q4 2025 | 67 | +0.0% | 13.12% | 8.72 pp | $37M | 40% |
| Q3 2025 | 67 | +1.5% | 21.84% | 1.88 pp | $61M | 7.9% |
| Q2 2025 | 66 | 9.6% | 23.72% | 7.14 pp | $66M | 23% |
| Q1 2025 | 73 | +7.4% | 30.86% | 11.74 pp | $86M | 28% |
| Q4 2024 | 68 | +3.0% | 42.60% | +2.11 pp | $119M | +5.2% |
| Q3 2024 | 66 | +8.2% | 40.49% | +11.15 pp | $113M | +38% |
| Q2 2024 | 61 | β | 29.34% | β | $82M | 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 RNAC stock.
Based on Q1 2026 13F filings, institutional ownership of Cartesian Therapeutics, Inc. stands at 15.7%, held across 81 reporting institutions.
Squarepoint Ops LLC is the largest reported institutional holder of RNAC, with approximately 2,238,486 shares worth $0.01B as of Q1 2026.
Yes β 4 widely-followed marquee investors appear among the top 25 institutional holders of RNAC, including MILLENNIUM MANAGEMENT LLC, TWO SIGMA INVESTMENTS, LP, CITADEL ADVISORS LLC, RENAISSANCE TECHNOLOGIES LLC.
Our composite Smart Money Score for RNAC is 76 out of 100 (Bullish). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
27 institutions opened new positions in RNAC during Q1 2026, while 13 fully exited. 19 added to existing positions and 33 trimmed.
RNAC institutional ownership rose by 2.57 percentage points quarter-over-quarter, with a net change of +14 holders.
The top 10 institutions account for 78.4% of all reported 13F value in RNAC, and the top 25 account for 95.7%.
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.
Cartesian Therapeutics, Inc. (RNAC) Institutional Ownership