Company · Ownership research

Cartesian Therapeutics, Inc. RNAC

CIK 0001453687 · CUSIP 816212302

Insider tradingInitial holdingsInstitutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 816212302 (RNAC), not CUSIP 816212902 (RNAC), and does not merge CUSIPs.

This page lists the top 20 of 67 rows by value; the complete set is available through the API.

Some filings reported values in thousands; those figures were scaled ×1,000 to dollars.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	FMR LLC CIK 315066 · View history	$24.25M 2,334,124 shares	0.00%	-5.79K(-0.20%)Reduced	SEC filing ↗ Aug 14, 2025	▾
02	MPM BIOIMPACT LLC CIK 1687078 · View history	$7.13M 686,007 shares	1.23%	-104.77K(-13.20%)Reduced	SEC filing ↗ Aug 14, 2025	▾
03	BlackRock, Inc. CIK 2012383 · View history	$6.79M 653,840 shares	0.00%	-19.21K(-2.90%)Reduced	SEC filing ↗ Aug 12, 2025	▾
04	Siren, L.L.C. CIK 2005245 · View history	$5.85M 563,272 shares	0.30%	0(0.00%)Unchanged	SEC filing ↗ Aug 13, 2025	▾
05	VANGUARD GROUP INC CIK 102909 · View history	$5.16M 496,366 shares	0.00%	-7.17K(-1.40%)Reduced	SEC filing ↗ Aug 11, 2025	▾
06	Erste Asset Management GmbH CIK 2024532 · View history	$2.70M 260,011 shares	0.02%	0(0.00%)Unchanged	SEC filing ↗ Aug 14, 2025	▾
07	683 Capital Management, LLC CIK 1404574 · View history	$2.28M 219,000 shares	0.23%	+69.00K(+46.00%)Added	SEC filing ↗ Aug 14, 2025	▾
08	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$2.28M 218,927 shares	0.00%	-6.57K(-2.90%)Reduced	SEC filing ↗ Aug 8, 2025	▾
09	STATE STREET CORP CIK 93751 · View history	$2.02M 194,269 shares	0.00%	-6.86K(-3.40%)Reduced	SEC filing ↗ Aug 14, 2025	▾
10	CITADEL ADVISORS LLC CIK 1423053 · View history	$1.26M 120,874 shares	0.00%	-26.42K(-17.90%)Reduced	SEC filing ↗ Aug 14, 2025	▾
11	NORTHERN TRUST CORP CIK 73124 · View history	$861.79K 82,944 shares	0.00%	-9.39K(-10.20%)Reduced	SEC filing ↗ Aug 13, 2025	▾
12	MARSHALL WACE, LLP CIK 1318757 · View history	$858.53K 82,630 shares	0.00%	+44.02K(+114.00%)Added	SEC filing ↗ Aug 13, 2025	▾
13	GSA CAPITAL PARTNERS LLP CIK 1362033 · View history	$432.00K 41,602 shares	0.03%	+24.81K(+147.80%)Added	SEC filing ↗ Jul 22, 2025	▾
14	JACOBS LEVY EQUITY MANAGEMENT, INC CIK 884414 · View history	$429.28K 41,317 shares	0.00%	+41.32KNew	SEC filing ↗ Aug 14, 2025	▾
15	BARCLAYS PLC CIK 312069 · Amended · View history	$318.71K 30,675 shares	0.00%	+16.31K(+113.50%)Added	SEC filing ↗ Feb 27, 2026	▾
16	MORGAN STANLEY CIK 895421 · View history	$303.52K 29,213 shares	0.00%	+11.36K(+63.70%)Added	SEC filing ↗ Aug 14, 2025	▾
17	Freestone Capital Holdings, LLC CIK 1470876 · View history	$269.32K 25,921 shares	0.01%	0(0.00%)Unchanged	SEC filing ↗ Aug 5, 2025	▾
18	Bank of New York Mellon Corp CIK 1390777 · View history	$259.55K 24,981 shares	0.00%	+4.04K(+19.30%)Added	SEC filing ↗ Aug 5, 2025	▾
19	CHARLES SCHWAB INVESTMENT MANAGEMENT INC CIK 884546 · View history	$258.74K 24,903 shares	0.00%	-4.40K(-15.00%)Reduced	SEC filing ↗ Aug 12, 2025	▾
20	Nuveen, LLC CIK 1871926 · View history	$254.52K 24,497 shares	0.00%	-3.37K(-12.10%)Reduced	SEC filing ↗ Aug 12, 2025	▾

Showing 20 / 67 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

Cancelled or null records excluded

Disclosed shares

6,401,052

Not deduplicated across managers

Disclosed value

$66.47M

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

Cartesian Therapeutics, Inc. · Q2 2025

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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.