RNAC · NASDAQ · Biotechnology

Cartesian Therapeutics (RNAC)

Develops outpatient mRNA CAR-T candidates for autoimmune diseases, led by Descartes-08.

$7.91
vs last close−0.17 (−2.10%)

13F · 13D/G · Form 4

Institutions≈ 28.84%8.73M shares
101 holders · as of Jun 30, 2026 · largest filers plus last quarter's tail
Insiders54.58%16.51M shares
16 holders · as of Apr 6, 2026
Other≈ 16.58%5.02M shares
remainder

30.26M company shares as of Sep 23, 2026 · institutions as of Jun 30, 2026 · holders as of their latest filing

This quarter's institutional total failed a plausibility check; shown: the largest filers plus last quarter's remainder.

13F · 13D/G · Form 4

HolderStakeSharesDate
Timothy A. Springer1Insiderdirector, 10 percent owner
32.38%9.56Mfiled Jan 6, 2026
Murat KalayogluInsider10 percent owner
19.25%5.82Mfiled Apr 6, 2026
Squarepoint Ops LLCInstitution
7.45%2.25Mas of Jun 30, 2026
BlackRock, Inc.Institution
2.71%819,239as of Jun 30, 2026
683 Capital Management, LLCInstitution
2.15%650,000as of Jun 30, 2026
Vanguard Capital Management LLCInstitution
1.84%555,823as of Jun 30, 2026
FMR LLCInstitution
1.22%368,429as of Jun 30, 2026
Geode Capital Management, LLCInstitution
1.18%356,525as of Jun 30, 2026
AQR Capital Management LLCInstitution
1.18%356,456as of Jun 30, 2026
Carsten BrunnInsiderdirector, officer: President and CEO
1.07%323,530filed Jan 8, 2026
Millennium Management LLCInstitution
1.02%309,887as of Jun 30, 2026
Two Sigma Investments, LPInstitution
0.98%296,293as of Jun 30, 2026
State Street CorpInstitution
0.82%249,212as of Jun 30, 2026
Marshall Wace, LLPInstitution
0.77%232,919as of Jun 30, 2026
UBS Group AGInstitution
0.69%208,647as of Jun 30, 2026
Jupiter Topco LLCInstitution
0.66%200,905as of Jun 30, 2026
Privium Fund Management B.V.Institution
0.50%151,675as of Jun 30, 2026
Blaine DavisInsiderofficer: Chief Financial Officer
0.40%121,220filed Jan 8, 2026
Northern Trust CorpInstitution
0.35%105,698as of Jun 30, 2026
Adar1 Capital Management, LLCInstitution
0.33%98,877as of Jun 30, 2026
Emily EnglishInsiderofficer: Chief Operations Officer
0.31%94,226filed Jan 6, 2026
Vanguard Fiduciary Trust CoInstitution
0.30%91,854as of Jun 30, 2026
Vanguard Portfolio Management LLCInstitution
0.29%87,317as of Jun 30, 2026
Diadema Partners LPInstitution
0.29%87,057as of Jun 30, 2026
Bank of America Corp /DE/Institution
0.28%84,624as of Jun 30, 2026
  1. Timothy A. Springer's transaction reports restate only vehicles that traded; the 2025 ownership statement (9.56M) plus the 241.5K net shares acquired since is used instead.

13F, as of Jun 30, 2026

101 holders · 8.73M shares · 29 new positions · 72 increased · 12 reduced · 13 closed

HolderShares% outstandingChg q/qFiled
Squarepoint Ops LLC2.25M7.45%+16.1KAug 14, 2026
BlackRock, Inc.819.2K2.71%+220.1KAug 7, 2026
683 Capital Management, LLC650.0K2.15%+320.0KAug 14, 2026
Vanguard Capital Management LLC555.8K1.84%+148.2KAug 13, 2026
FMR LLC368.4K1.22%−431.3KAug 13, 2026
Geode Capital Management, LLC356.5K1.18%+92.8KAug 12, 2026
AQR Capital Management LLC356.5K1.18%+272.4KAug 14, 2026
Millennium Management LLC309.9K1.02%+25.6KAug 14, 2026

13D/G · 5% or more, as filed

Holder% of classSharesFormFiled
Timothy A. Springerincl. TAS Partners LLC, Chafen Lu36.90%9.56M13DJan 15, 2025
Murat Kalayogluincl. Elizabeth Hoge, Sinan Kalayoglu +1 more19.90%5.83M13DApr 2, 2026
Squarepoint Ops LLC8.30%2.21M13GMar 13, 2026
JPMorgan Chase & Co.6.10%1.68M13GApr 25, 2025
Barclays PLC5.99%1.76M13GAug 13, 2026

Form 4

Latest trades

DateInsiderTypeSharesAvg priceOwned after
Jan 6, 2026
Blaine Davisofficer: Chief Financial Officer
Sale10,591$6.82121,220
Jan 6, 2026
Milos Miljkovicofficer: Chief Medical Officer
Sale3,573$6.8258,820
Jan 6, 2026
Carsten Brunndirector, officer: President and CEO
Sale23,766$6.82323,530
Dec 4, 2025
Timothy C. Barabedirector
Purchase30,000$6.8654,366

House and Senate disclosures

Not reported.