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Disclosery

KLRS KALARIS THERAPEUTICS INC

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COM (common), issuer CIK 1754068

51 managers (51 13F filers) reported a position in KLRS shares at 2025-12-31, 17,996,169 shares in all. 21 filers opened a position and 5 filers sold out during the quarter.

Managers
51
13F filers
51
New
21
Added
10
Reduced
7
Sold out
5
Shares held by filers
17,996,169

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

No Form 4 transaction on this security in the data.

13F holders, Q4 2025

Filers in the available 13F reports with a share position at 2025-12-31, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
SAMSARA BIOCAPITAL, LLC12,948,081$109M11.27%+1,500,00013F-HRTimeline
RTW INVESTMENTS, LP1,300,000$11M0.11%new13F-HRTimeline
Paradigm Biocapital Advisors LPin group Paradigm Biocapital Advisors …700,000$5.91M0.16%new13F-HRTimelineGroup
Siren, L.L.C.in group Siren, L.L.C.435,798$3.68M0.11%+117,53413F-HRTimelineGroup
Alyeska Investment Group, L.P.in group Alyeska Investment Group, L.P.403,551$3.4M0.01%new13F-HRTimelineGroup
Ikarian Capital, LLCin group Ikarian Capital, LLC360,000$3.04M0.39%new13F-HRTimelineGroup
VANGUARD GROUP INCin group VANGUARD GROUP INC292,790$2.47M<0.01%+89,73913F-HRTimelineGroup
Kalehua Capital Management LLC139,901$1.18M1.17%13F-HRTimeline
Woodline Partners LP100,000$844K<0.01%-141,10213F-HRTimeline
ADAR1 Capital Management, LLCin group ADAR1 Capital Management, LLC100,000$844K0.06%new13F-HR/ATimelineGroup
WHI TRUST Co LLC97,493$823K0.63%13F-HRTimeline
BOOTHBAY FUND MANAGEMENT, LLC92,261$779K0.02%new13F-HRTimeline
RAYMOND JAMES FINANCIAL INCin group RAYMOND JAMES FINANCIAL INC88,436$746K<0.01%new13F-HRTimelineGroup
RENAISSANCE TECHNOLOGIES LLC87,751$741K<0.01%-25,00013F-HRTimeline
Redmile Group, LLCin group Redmile Group, LLC82,955$700K0.05%013F-HRTimelineGroup
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC82,647$698K<0.01%+18,09613F-HRTimelineGroup
683 Capital Management, LLCin group 683 Capital Management, LLC80,590$680K0.06%new13F-HRTimelineGroup
MARSHALL WACE, LLPin group MARSHALL WACE, LLP72,876$615K<0.01%+58,76113F-HRTimelineGroup
Propel Bio Management, LLC42,053$355K0.3%new13F-HRTimeline
Belpointe Asset Management LLC40,000$338K0.01%013F-HRTimeline
Fortis Capital Advisors, LLC40,000$338K0.05%013F-HRTimeline
BlackRock, Inc.in group BlackRock, Inc.38,454$325K<0.01%-1,92513F-HRTimelineGroup
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC34,303$290K<0.01%+11,83813F-HR/ATimelineGroup
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC33,114$279K<0.01%new13F-HRTimelineGroup
OMERS ADMINISTRATION Corp30,000$253K<0.01%new13F-HRTimeline
MORGAN STANLEYin group MORGAN STANLEY27,948$236K<0.01%+3,03013F-HR/ATimelineGroup
TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP27,759$234K<0.01%new13F-HRTimelineGroup
STATE STREET CORPin group STATE STREET CORP25,410$214K<0.01%+2,80013F-HRTimelineGroup
Squarepoint Ops LLCin group Squarepoint Ops LLC25,367$214K<0.01%-14,80613F-HRTimelineGroup
BRIDGEWAY CAPITAL MANAGEMENT, LLC22,500$190K<0.01%013F-HRTimeline
Simplify Asset Management Inc.20,074$169K<0.01%new13F-HRTimeline
RBF Capital, LLC17,391$147K0.01%013F-HR/ATimeline
NORTHERN TRUST CORPin group NORTHERN TRUST CORP13,654$115K<0.01%new13F-HRTimelineGroup
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…12,856$109K<0.01%new13F-HRTimelineGroup
Walleye Capital LLCin group Walleye Capital LLC11,225$94.7K<0.01%new13F-HRTimelineGroup
XTX Topco Ltdin group XTX Topco Ltd10,897$92K<0.01%new13F-HRTimelineGroup
Keel Point, LLC10,225$86.3K0.01%new13F-HRTimeline
Connor, Clark & Lunn Investment Managem…10,159$85.7K<0.01%new13F-HRTimeline
Johnson Financial Group, Inc.in group Johnson Financial Group, Inc.10,000$84.4K<0.01%013F-HRTimelineGroup
FMR LLCin group FMR LLC7,806$65.9K<0.01%013F-HRTimelineGroup
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/6,704$56.6K<0.01%+6,48713F-HRTimelineGroup
BARCLAYS PLCin group BARCLAYS PLC6,065$51.2K<0.01%new13F-HRTimelineGroup
NANO CAP NEW MILLENNIUM GROWTH FUND L P4,000$33.8K0.03%13F-HRTimeline
UBS Group AGin group UBS Group AG2,691$22.7K<0.01%-2,56113F-HRTimelineGroup
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA113$1K<0.01%+2813F-HRTimelineGroup
Fortitude Family Office, LLC114$962<0.01%new13F-HRTimeline
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS52$439<0.01%-8913F-HRTimelineGroup
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO50$422<0.01%013F-HRTimelineGroup
Parallel Advisors, LLC49$414<0.01%013F-HRTimeline
SBI Securities Co., Ltd.5$42<0.01%-313F-HRTimeline
CITIGROUP INCin group CITIGROUP INC1$8<0.01%013F-HRTimelineGroup