Security Snapshot

Cartesian Therapeutics, Inc. - COMMON STOCK (RNAC) Institutional Ownership

CUSIP: 816212302

13F Institutional Holders and Ownership History from Q1 2023 to Q1 2026

Latest Period

Q1 2026

Institutions Reporting

81

Shares (Excl. Options)

7,151,630

Price

$6.15

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Security type / class
Equity / COMMON STOCK
Symbol
RNAC on Nasdaq
All holders as of 31 Mar 2026
Q1 2026
Total 13F shares
7,151,630
Latest holder snapshot 5 signals
Total 13F value
$43,929,103
Portfolio coverage rank
0%
Share change
+1,977,449
Value change
+$11,824,838
Number of holders
81
Issuer context Names, identifiers, and filing context for this profile. 3 identity fields
Shares outstanding
26,658,100
SEC-reported price per share
$8.53
Insider filing price
$8.53
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors

Key facts

  • RNAC - Cartesian Therapeutics, Inc. - COMMON STOCK is tracked under CUSIP 816212302.
  • 81 institutions reported positions in Q1 2026.
  • 5 significant owners is listed from Schedule 13D/13G reporting.

Change

  • Holder count moved from 66 to 81 between Q4 2025 and Q1 2026.
  • SEC-reported value moved from $37,214,593 to $43,929,103.

Research use

  • You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
  • 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.

Evidence

Source: SEC Form 13F

Latest holder context comes from 81 institutions filings for Q1 2026.

Open SEC evidence

Security key

816212302

Latest holder period

Q1 2026

13F holders

81

13D/G owners

5

CIK / CUSIP context first

Open Q1 2026 holders RNAC full holder history Cartesian Therapeutics, Inc. SEC filings Cartesian Therapeutics, Inc. company facts Cartesian Therapeutics, Inc. insider transactions

Broader feeds

Latest 13F filings Latest 13D/G filings All securities

13D/G owners

Significant owners

Large-stake holder rows connected to Schedule 13D/G evidence.

Rows
5
Security
RNAC
Filer Ownership Change % Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
SPRINGER TIMOTHY A 37% +0.27% $116,671,361 +$258,583 9,555,394 +0.22% Timothy A. Springer 13 Jan 2025
Kalayoglu Murat 20% $48,188,600 5,833,971 Murat Kalayoglu 31 Mar 2026
Squarepoint Ops LLC 8.3% $14,163,542 2,209,601 Squarepoint Ops LLC 09 Mar 2026
JPMORGAN CHASE & CO 6.1% $20,459,516 1,675,636 JPMORGAN CHASE & CO. 31 Mar 2025
FMR LLC 3% -46% $4,990,396 -$3,539,615 799,743 -41% FMR LLC 31 Mar 2026

As of 31 Mar 2026, 81 institutional investors reported holding 7,151,630 shares of Cartesian Therapeutics, Inc. - COMMON STOCK (RNAC). This represents 27% of the company’s total 26,658,100 outstanding shares.

13F concentration

Top 25 institutional shareholders

Largest 13F positions for this security by reported shares and value.

Top holder share
26%
Institution Ownership % Shares Held Share Change % Portfolio % Holdings Value
Squarepoint Ops LLC 8.4% 2,238,486 +12191% 0.03% $13,766,689
FMR LLC 3% 799,743 -41% 0% $4,918,419
BlackRock, Inc. 2.2% 599,108 -1.7% 0% $3,684,515
VANGUARD CAPITAL MANAGEMENT LLC 1.5% 407,597 0% 0% $2,506,722
683 Capital Management, LLC 1.2% 330,000 +18% 0.19% $2,029,500
MILLENNIUM MANAGEMENT LLC 1.1% 284,317 +73% 0% $1,748,550
GEODE CAPITAL MANAGEMENT, LLC 0.99% 263,694 +3.2% 0% $1,621,951
MARSHALL WACE, LLP 0.94% 251,115 +41% 0% $1,544,359
Erste Asset Management GmbH 0.83% 221,705 -18% 0.01% $1,303,625
STATE STREET CORP 0.75% 200,337 +0.69% 0% $1,232,073
Privium Fund Management B.V. 0.67% 179,114 +3.8% 0.23% $1,101,551
TWO SIGMA INVESTMENTS, LP 0.63% 167,313 +83% 0% $1,028,975
UBS Group AG 0.51% 136,840 +103% 0% $841,566
CITADEL ADVISORS LLC 0.41% 110,128 +38% 0% $677,287
JACOBS LEVY EQUITY MANAGEMENT, INC 0.38% 101,534 +6% 0% $624,434
NORTHERN TRUST CORP 0.35% 91,992 +5.7% 0% $565,750
AQR CAPITAL MANAGEMENT LLC 0.32% 84,020 0% $516,724
VANGUARD FIDUCIARY TRUST CO 0.26% 70,296 0% 0% $432,320
RENAISSANCE TECHNOLOGIES LLC 0.25% 67,300 +64% 0% $413,895
VANGUARD PORTFOLIO MANAGEMENT LLC 0.23% 60,583 0% 0% $372,585
Diametric Capital, LP 0.14% 38,069 0.06% $234,124
Nuveen, LLC 0.14% 37,451 +53% 0% $230,324
GOLDMAN SACHS GROUP INC 0.12% 30,927 0% $190,201
XTX Topco Ltd 0.11% 30,055 +194% 0% $184,838
Bank of New York Mellon Corp 0.1% 26,099 +3.4% 0% $160,509

Quarter history

Institutional holders across reporting periods

Holder count, reported shares/value, and median price by quarter.

Periods
13
Latest
Q1 2026
Rows shown
1-13 of 13
Period 13F Shares, Excl. Options Value, Excl. Options Value Change Price (Median) Investors
2026 Q1 7,151,630 $43,929,103 +$11,824,838 $6.15 81
2025 Q4 5,161,870 $37,214,593 -$8,841,222 $7.21 66
2025 Q3 5,968,086 $60,898,831 -$4,440,064 $10.22 65
2025 Q2 6,401,037 $66,468,780 -$2,049,017 $10.39 65
2025 Q1 6,582,077 $86,710,172 -$755,346 $13.18 68
2024 Q4 6,665,799 $119,478,509 -$2,692,613 $17.91 64
2024 Q3 6,867,968 $110,349,366 +$42,879,892 $16.12 61
2024 Q2 3,268,033 $88,276,427 +$88,059,260 $27.01 57
2024 Q1 1,855 $1,157 +$1,157 $0.64 4
2023 Q4 0 $0 -$1,272 $8.53 0
2023 Q3 1,200 $1,272 $1.06 1
2023 Q2 1,200 $1,344 $1.12 1
2023 Q1 1,200 $1,668 +$1,668 $1.39 1
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