13F Insight
DOSSIER · 13F Holders · Q1 2026
KLRS

KALARIS THERAPEUTICS INC

57 institutions still hold KALARIS THERAPEUTICS INC as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 482929106·57 13F holders·last filed Mar 31, 2026
Market cap
—
13F value held
$94M
visible holders
Holders
57
filers reporting
Concentration
79.10%
Samsara BioCapital, LLC #1
top holder share
AI Holders Summary · Q1 2026

57 institutions reported KLRS in Q1 2026. Samsara BioCapital, LLC leads at 79.1% of the visible book.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
Samsara BioCapital, LLC
CIK 0001744967
$75M12.9M7.26%Q1 202602
RTW INVESTMENTS, LP
CIK 0001493215
$5M1.3M0.05%Q2 202603
Alyeska Investment Group, L.P.
CIK 0001453072
$2M573K0.01%Q2 202604
Ikarian Capital, LLC
CIK 0001778253
$2M360K0.17%Q1 202605
Siren, L.L.C.
CIK 0002005245
$2M436K0.04%Q2 202606
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$2M399K0.00%Q2 202607
UBS Group AG
CIK 0001610520
$1M262K0.00%Q2 202608
683 Capital Management, LLC
CIK 0001404574
$680K81K0.03%Q4 202509
RENAISSANCE TECHNOLOGIES LLC
CIK 0001037389
$608K149K0.00%Q2 202610
MARSHALL WACE, LLP
CIK 0001318757
$567K139K0.00%Q2 202611
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$464K114K0.00%Q2 202612
Woodline Partners LP
CIK 0001784547
$407K100K0.00%Q2 202613
ADAR1 Capital Management, LLC
CIK 0001940272
$407K100K0.02%Q2 202614
WHI TRUST Co LLC
CIK 0002013902
$397K97K0.26%Q2 202615
RAYMOND JAMES FINANCIAL INC
CIK 0000720005
$395K97K0.00%Q2 202616
CITADEL ADVISORS LLC
CIK 0001423053
$390K96K0.00%Q2 202617
BOOTHBAY FUND MANAGEMENT, LLC
CIK 0001549230
$376K92K0.00%Q2 202618
Verdad Advisers, LP
CIK 0001812822
$327K80K0.31%Q2 202619
MORGAN STANLEY
CIK 0000895421
$294K72K0.00%Q2 202620
VANGUARD FIDUCIARY TRUST CO
CIK 0000933478· Index
$269K66K0.00%Q2 2026
Page 1 of 3
37 more holders available. Log in →
Insiders at KALARIS THERAPEUTICS INC
Keating Laurie →Bayko Liisa Ann →Ferrara Napoleone →Jovan-Embiricos Morana →Patterson Leone D →Adamis Anthony P →Dybbs Michael →Gall Matthew →