Cartesian Therapeutics, Inc. (RNAC)
Nasdaq: RNAC · Pharmaceutical Preparations · Frederick, MD · filing with the SEC since 2009
Who owns Cartesian Therapeutics, Inc.
As filed with the SECHolders of 5% or more
4
Timothy A. Springer holds 36.9% of Common Stock, $0.0001 par value per share, as its SCHEDULE 13D/A filed Jan 15, 2025 says.
Directors and officers
13
report now, of 48 people on the record since 2016. Their holdings as a group are not read here.
Institutions as a whole
n/a
The record does not read the share held by managers that file Form 13F, so none is printed and no split of the rest is estimated. What it holds is the 4 named at left.
Holders of 5% or moreshare of the class, as filed
Timothy A. Springer
SCHEDULE 13D/A · filed Jan 15, 2025 · Common Stock, $0.0001 par value per share · 36.8% in Dec 23, 2024
Murat Kalayoglu
SCHEDULE 13D/A · filed Apr 2, 2026 · Common Stock
Squarepoint Ops LLC
SCHEDULE 13G · filed Mar 13, 2026 · Common Stock
Barclays PLC
SCHEDULE 13G · filed Aug 13, 2026 · COMMON-STOCK
JPMorgan Chase & Co.
SCHEDULE 13G/A · filed Jul 22, 2026 · Common Stock, $0.0001 par value per share · reported falling below 5%, from 6.1% in Apr 25, 2025
Fmr LLC
SCHEDULE 13G/A · filed May 6, 2026 · COMMON STOCK · reported falling below 5%, from 5.3% in Feb 5, 2026
What RNAC reports owning in othersstakes of 5% or more, and other ties
Other ties the annual report names
Old Cartesian
A company bought · acquisition · Oct 2023 · owns, named in the 10-K filed Mar 9, 2026
2 subsidiaries in 2 countries, from the list filed with the 10-K filed Mar 9, 2026.
Insider tradesForm 4
3sales
1purchases
0sales on a scheduled plan
3people selling
$300,000sold, in dollars
$200,000bought, in dollars
Open-market trades on Form 4 from Sep 30, 2025 to Sep 30, 2026. A scheduled plan is a selling program set in advance under SEC rule 10b5-1. The trades are listed as filed and do not feed the grade.
By calendar yearSoldBought
2026 runs to Sep 30, 2026. Dollars as filed, summed by the transaction date.
People who traded in the window4 of 65 on the roster
| Person | Role as filed | Sales | Sold | On a plan | Buys | Bought |
|---|---|---|---|---|---|---|
| Brunn Carsten | President and CEO | 1 | $200,000 | 0 | 0 | $0 |
| Davis Blaine | Chief Financial Officer | 1 | $100,000 | 0 | 0 | $0 |
| Barabe Timothy C | director | 0 | $0 | 0 | 1 | $200,000 |
| Miljkovic Milos | Chief Medical Officer | 1 | $0 | 0 | 0 | $0 |