As of the latest Form 4 filed Apr 6, 2026.
What Cartesian Therapeutics Inc. insiders — officers, directors and 10% owners — have bought and sold in their own stock, straight from their SEC Form 4 filings. Values are shares × the reported transaction price where both are disclosed.
Buys plotted up, sells down; bar height is the disclosed dollar value (shares × reported price). Our Form 4 history is only complete from mid-2026, so early months are sparse — the series fills in as more filings land. Open-market purchases and sales only.
Newest filing first — the 21 most recent filings for RNAC.
| Filed | Trade date | Insider | Transaction | Shares | Price | Value | 10b5-1 | Filing |
|---|---|---|---|---|---|---|---|---|
| 2026-04-06 | 2026-04-02 | Hoge Elizabeth 10% owner | MExercise | +758K | — | — | No | Form 4 ↗ |
| 2026-04-06 | 2026-04-02 | Kalayoglu Murat 10% owner | MExercise | +758K | — | — | No | Form 4 ↗ |
| 2026-03-13 | 2026-03-13 | Singer Michael Director | GGift | −6.55K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-01-08 | 2026-01-06 | Brunn Carsten President and CEO | SSale | −23.8K | $6.82 | $162K | No | Form 4 ↗ |
| 2026-01-08 | 2026-01-06 | Miljkovic Milos Chief Medical Officer | SSale | −3.57K | $6.82 | $24.4K | No | Form 4 ↗ |
| 2026-01-08 | 2026-01-06 | Davis Blaine Chief Financial Officer | SSale | −10.6K | $6.82 | $72.2K | No | Form 4 ↗ |
| 2026-01-06 | 2026-01-02 | DeSilva Nishan M Director | AAward | +2.60K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-01-06 | 2026-01-02 | Brunn Carsten President and CEO | AAward | +143K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-01-06 | 2026-01-02 | Malik Kemal Director | AAward | +2.60K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-01-06 | 2026-01-02 | Miljkovic Milos Chief Medical Officer | AAward | +27.0K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-01-06 | 2026-01-02 | ZENNER PATRICK J Director | AAward | +2.60K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-01-06 | 2026-01-02 | Seymour June Ann Chief Accounting Officer | AAward | +6.50K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-01-06 | 2026-01-02 | Davis Blaine Chief Financial Officer | AAward | +37.0K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-01-06 | 2026-01-02 | BARABE TIMOTHY C Director | AAward | +2.60K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-01-06 | 2026-01-02 | English Emily Chief Operations Officer | AAward | +24.0K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-01-06 | 2026-01-02 | Singer Michael Director | AAward | +2.60K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-01-06 | 2026-01-02 | SPRINGER TIMOTHY A Director | AAward | +2.60K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-01-06 | 2026-01-02 | Kalayoglu Murat Director | AAward | +2.60K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-01-02 | 2025-12-30 | English Emily Chief Operations Officer | MExercise | +7.50K | $3.30 | $24.8K | No | Form 4 ↗ |
| 2025-12-18 | 2025-12-16 | Bot Adrian Ion Director | AAward | +5.80K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2025-12-08 | 2025-12-04 | BARABE TIMOTHY C Director | PPurchase | +30.0K | $6.86 | $206K | No | Form 4 ↗ |
Insiders — a company’s officers, directors and holders of more than 10% of its stock — must report any trade in that stock to the SEC on a Form 4 within two business days. Each row here is one transaction from those filings.
The transaction code tells you what happened: Purchase (P) and Sale (S) are open-market trades — the ones markets watch most; Award (A) is a granted stock or unit, Option exercise (M) converts options into shares, and Gift (G) is a transfer for no consideration. Awards, exercises and gifts are largely compensation or administrative, not a directional bet.
One caveat on sales: many are made under a Rule 10b5-1 plan scheduled months in advance, so a sale is not automatically a bearish signal. Insider activity is a noisy input — read it alongside the filings, not on its own.
See also RNAC’s full analysis or the market-wide insider trading feed. The tabs above jump to RNAC’s other SEC data.
Source: SEC Form 4 filings for RNAC, parsed from EDGAR. Transaction prices are as reported in the filing — SEC public-domain data, not market quotes. Values are shares × reported price where both are disclosed; grants and gifts often carry no price. A delayed record of what insiders reported, not a live position or a recommendation.
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