Cartesian Therapeutics Inc.
Ownership
Ownership Structure
Who owns Cartesian Therapeutics Inc. (RNAC)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 38.0% of the shares are freely tradable; institutional investors hold 24.5%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Squarepoint Ops LLC | 7.40 | 2,238,486 | +12,190.6 | 03/31/2026 |
| FMR Inc | 2.64 | 799,743 | -41.5 | 03/31/2026 |
| BlackRock Inc | 1.98 | 599,108 | -1.7 | 03/31/2026 |
| Vanguard Capital Management, LLC | 1.35 | 407,597 | +0.0 | 03/31/2026 |
| 683 Capital Management LLC | 1.09 | 330,000 | +17.9 | 03/31/2026 |
| Millennium Management LLC | 1.02 | 309,887 | +9.0 | 06/30/2026 |
| Two Sigma Investments LLC | 0.98 | 296,293 | +77.1 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard MStar Total Stk Mkt Idx Invest | 1.24 | 376,309 | +0.0 | 07/31/2026 |
| Fidelity Select Biotechnology | 1.21 | 366,554 | +0.0 | 07/31/2026 |
| iShares Russell 2000 ETF | 1.10 | 333,542 | -0.6 | 08/31/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Data as of: September 18, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.