Company · Ownership research

Cartesian Therapeutics, Inc. RNAC

CIK 0001453687

Form 4 transactions dated Nov 1, 2023 to Nov 15, 2026, as reported to the SEC.

Insider trading Initial holdings Institutional holders

This page lists 30 of 42 rows; the complete set is available through the API.

Insider filings on file run through Apr 6, 2026.

Insider purchases & sales

Purchased: $16.98M
Sold: $5.08M

Nov 1, 2023 – Apr 6, 2026
Available records · partial months are marked ·

202510 of 24 preview events

Date	Insider	Activity	Trade value (USD)	% of prior holding
Dec 4, 2025	BARABE TIMOTHY C Director	Purchase	$205.80K 30,000 shares bought	123.12% added Direct holding	▾
Apr 11, 2025	SPRINGER TIMOTHY A Director · 10% owner	Purchase	$69.07K 6,412 shares bought	0.07% added Direct holding	▾
Apr 11, 2025	SPRINGER TIMOTHY A Director · 10% owner	Purchase	$391.45K 36,338 shares bought	5.86% added Indirect holding	▾
Apr 10, 2025	SPRINGER TIMOTHY A Director · 10% owner	Purchase	$89.77K 8,575 shares bought	0.10% added Direct holding	▾
Apr 10, 2025	SPRINGER TIMOTHY A Director · 10% owner	Purchase	$508.75K 48,595 shares bought	8.50% added Indirect holding	▾
Apr 9, 2025	SPRINGER TIMOTHY A Director · 10% owner	Purchase	$69.52K 7,373 shares bought	0.09% added Direct holding	▾
Apr 9, 2025	SPRINGER TIMOTHY A Director · 10% owner	Purchase	$393.95K 41,782 shares bought	7.89% added Indirect holding	▾
Mar 20, 2025	SPRINGER TIMOTHY A Director · 10% owner	Purchase	$855.59K 54,889 shares bought	0.64% added Direct holding	▾
Mar 19, 2025	SPRINGER TIMOTHY A Director · 10% owner	Purchase	$302.96K 20,234 shares bought	0.24% added Direct holding	▾
Mar 18, 2025	SPRINGER TIMOTHY A Director · 10% owner	Purchase	$212.60K 14,740 shares bought	0.17% added Direct holding	▾

Showing 24 / 24 record groups in 2025. The complete set is available through the API.

Cartesian Therapeutics, Inc. · RNAC

Follow the people behind the trades.

Log in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and reach other datasets through the Akkru API.

Download CSV
Earlier filings
Advanced screening & filtering
API & AI access

Already have an account?

＋ New accounts get free API credits to explore data beyond ownership filings.

For AI agents & developers

The initial HTML of this page carries its exact data as script#research-data (JSON): values, units, scope, preview limits and SEC sources. Read it directly, no script or API key needed; script#research-access says what needs an account. For the year shown, this page lists 24 of 24 purchase / sale groups and 30 of 42 other groups; the totals and the monthly series cover the whole window.

Without an account: the last 3 years, with the row caps stated on the page. A free account opens all history on file on these pages and the CSV of what a page shows. Rows beyond the caps and bulk retrieval go through the authenticated API / MCP / CLI.

MCP  https://api.akkrudata.ai/mcp

akkru_insider_transactions
{"action":"list","ticker":"RNAC","transaction_code":["P","S"],"transaction_form_type":"4","page_size":20}

Connect to MCP with OAuth and follow the returned pagination. Credits and usage limits depend on the account.

MCP endpoint: https://api.akkrudata.ai/mcp
API / MCP / CLI documentation: /documents
llms.txt: /llms.txt

Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.

Non-cancelled, non-derivative purchase (P) and sale (S) rows dated inside the public window, as reported. Share totals are on today's split-adjusted basis. Includes open-market and private transactions. Data after the latest filing is not asserted complete and is not zero-filled. A grouped event shares filing, transaction date, security, code, direction, ownership bucket and source. Derivative groups also match underlying security, exercise price, exercise/expiration dates and footnote references. Reported rows are retained; P/S price lots can be grouped. Post-transaction balances are never summed.