Vault-13

KALARIS THERAPEUTICS INC KLRS

COM · Common Stock · CUSIP 482929106

57 institutional holders -1 vs Q1 2026
18,035,98118.0m shares reported held*
75.8% of all shares outstanding*
$73.4mreported value*
10 new 18 added 9 reduced 11 sold out net sold ≈ $2.8m (-678.4k shares)

* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once. Holder counts are more reliable. Shares outstanding: 23.8m as of 2026-08-04, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $4.07.

Trends to Q2 2026

Institutional holders

Managers reporting a position, each quarter

0204060Q1 25: 33Q2 25: 31Q3 25: 32Q4 25: 51Q1 26: 58Q2 26: 5757Q1 25Q2 25Q3 25Q4 25Q1 26Q2 26
Numbers
QuarterHolders
Q1 202533
Q2 202531
Q3 202532
Q4 202551
Q1 202658
Q2 202657

Buyers vs sellers

Managers adding to or starting a position, vs cutting or selling out

Bought or addedCut or sold out
40040Q2 25: 13 bought or addedQ2 25: 13 cut or sold outQ2 25Q3 25: 18 bought or addedQ3 25: 12 cut or sold outQ3 25Q4 25: 32 bought or addedQ4 25: 13 cut or sold outQ4 25Q1 26: 29 bought or addedQ1 26: 14 cut or sold outQ1 26Q2 26: 28 bought or addedQ2 26: 20 cut or sold outQ2 26
Numbers
QuarterBought or addedCut or sold out
Q2 20251313
Q3 20251812
Q4 20253213
Q1 20262914
Q2 20262820

Biggest buyers

UBS Group AG Added +255,947+255.9k
VANGUARD CAPITAL MANAGEMENT LLC Added +143,364+143.4k
CITADEL ADVISORS LLC New +95,772+95.8k
RENAISSANCE TECHNOLOGIES LLC Added +83,200+83.2k
Verdad Advisers, LP New +80,297+80.3k
MARSHALL WACE, LLP Added +71,322+71.3k
Pale Fire Capital SE New +39,626+39.6k
MORGAN STANLEY Added +33,982+34.0k
Trexquant Investment LP New +29,737+29.7k
VANGUARD FIDUCIARY TRUST CO Added +29,462+29.5k

Biggest sellers

Paradigm Biocapital Advisors LP Sold out -700,000-700.0k
Propel Bio Management, LLC Sold out -295,771-295.8k
Kalehua Capital Management LLC Sold out -271,170-271.2k
GOLDMAN SACHS GROUP INC Reduced -94,449-94.4k
Simplify Asset Management Inc. Sold out -87,426-87.4k
SAMSARA BIOCAPITAL, LLC Reduced -66,906-66.9k
MILLENNIUM MANAGEMENT LLC Sold out -59,534-59.5k
683 Capital Management, LLC Sold out -45,000-45.0k
SUSQUEHANNA INTERNATIONAL GROUP, LLP Reduced -38,463-38.5k
RAYMOND JAMES FINANCIAL INC Reduced -21,723-21.7k

Major shareholders (over 5%)

Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.

HolderStakeChangeShares Last filed
Samsara BioCapital, L.P. 13D · may seek influence -2.3 pts · filed 2026-05-22 54.2% -2.3 pts 12.9m≈ $52.5m 2026-05-22
RTW INVESTMENTS, LP 13G · institution new · filed 2026-02-17 5.7% new 1.3m≈ $5.3m 2026-02-17
Coastlands Capital LP 13G · institution new · filed 2026-10-26 5.7% new 1.4m≈ $5.5m 2026-10-26

Insider purchases and sales since 1 Apr 2026

Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.

Officers and directors buying vs selling

Number of people, by quarter (10% owners not included)

BuyingSelling
404Q4 24: 0 buyingQ4 24: 4 sellingQ1 25: 0 buyingQ1 25: 3 sellingQ1 25Q2 25: 0 buyingQ2 25: 0 sellingQ3 25: 0 buyingQ3 25: 0 sellingQ3 25Q4 25: 1 buyingQ4 25: 0 sellingQ1 26: 0 buyingQ1 26: 1 sellingQ1 26Q2 26: 1 buyingQ2 26: 0 sellingQ3 26: 0 buyingQ3 26: 0 sellingQ3 26
Numbers
QuarterBuyingBoughtSellingSoldSold under a plan
Q4 20240—4——
Q1 20250—3$15.3k—
Q2 20250—0——
Q3 20250—0——
Q4 20251$5.0m0——
Q1 20260—1$12.9k—
Q2 20261$1.2m0——
Q3 20260—0——
DateInsiderTradeSharesPrice ValueTheir holding
2026-05-20 AKKARAJU SRINIVAS +4 Director · By Samsara Opportunity Fund, L.P. Bought 244,300 $4.83 $1.2m244.3k shares +12%

Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).

Holders, Q2 2026

#ManagerLocationShares Value% of their portfolioChangeShares change
1 SAMSARA BIOCAPITAL, LLC 4.31% of their portfolio PALO ALTO, CA 12,881,17512.9m $52.4m $52.4m 4.31% Reduced -66.9k -66,906
2 RTW INVESTMENTS, LP 0.05% of their portfolio NEW YORK, NY 1,300,0001.3m $5.3m $5.3m 0.05% Unchanged
3 Alyeska Investment Group, L.P. 0.01% of their portfolio CHICAGO, IL 572,687572.7k $2.3m $2.3m 0.01% Unchanged
4 Siren, L.L.C. 0.04% of their portfolio New York, NY 435,798435.8k $1.8m $1.8m 0.04% Unchanged
5 VANGUARD CAPITAL MANAGEMENT LLC 0.00% of their portfolio MALVERN, PA 398,712398.7k $1.6m $1.6m 0.00% Added +143.4k +143,364
6 Ikarian Capital, LLC 0.24% of their portfolio DALLAS, TX 360,000360.0k $1.5m $1.5m 0.24% Unchanged
7 UBS Group AG 0.00% of their portfolio ZURICH, V8 262,131262.1k $1.1m $1.1m 0.00% Added +255.9k +255,947
8 RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio NEW YORK, NY 149,351149.4k $607.9k $607.9k 0.00% Added +83.2k +83,200
9 MARSHALL WACE, LLP 0.00% of their portfolio LONDON, X0 139,201139.2k $566.5k $566.5k 0.00% Added +71.3k +71,322
10 GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio BOSTON, MA 114,037114.0k $464.3k $464.3k 0.00% Added +26.5k +26,492
11 Woodline Partners LP 0.00% of their portfolio San Francisco, CA 100,000100.0k $407.0k $407.0k 0.00% Unchanged
12 ADAR1 Capital Management, LLC 0.02% of their portfolio AUSTIN, TX 100,000100.0k $407.0k $407.0k 0.02% Unchanged
13 WHI TRUST Co LLC 0.26% of their portfolio CHICAGO, IL 97,49397.5k $396.8k $396.8k 0.26% Unchanged
14 RAYMOND JAMES FINANCIAL INC 0.00% of their portfolio ST. PETERSBURG, FL 97,16497.2k $395.5k $395.5k 0.00% Reduced -21.7k -21,723
15 CITADEL ADVISORS LLC 0.00% of their portfolio MIAMI, FL 95,77295.8k $389.8k $389.8k 0.00% New
16 BOOTHBAY FUND MANAGEMENT, LLC 0.01% of their portfolio NEW YORK, NY 92,26192.3k $375.5k $375.5k 0.01% Unchanged
17 Verdad Advisers, LP 0.31% of their portfolio BOSTON, MA 80,29780.3k $326.8k $326.8k 0.31% New
18 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 72,32672.3k $294.4k $294.4k 0.00% Added +34.0k +33,982
19 VANGUARD FIDUCIARY TRUST CO 0.00% of their portfolio MALVERN, PA 66,17966.2k $269.3k $269.3k 0.00% Added +29.5k +29,462
20 BlackRock, Inc. 0.00% of their portfolio New York, NY 54,44254.4k $221.6k $221.6k 0.00% Added +18.4k +18,399
21 Belpointe Asset Management LLC 0.01% of their portfolio RENO, NV 40,00040.0k $162.8k $162.8k 0.01% Unchanged
22 Fortis Capital Advisors, LLC 0.02% of their portfolio PRAIRIE VILLAGE, KS 40,00040.0k $162.8k $162.8k 0.02% Unchanged
23 Pale Fire Capital SE 0.01% of their portfolio Prague, 2N 39,62639.6k $161.3k $161.3k 0.01% New
24 Squarepoint Ops LLC 0.00% of their portfolio NEW YORK, NY 38,77538.8k $157.8k $157.8k 0.00% Reduced -998 -998
25 BRIDGEWAY CAPITAL MANAGEMENT, LLC 0.00% of their portfolio HOUSTON, TX 32,50032.5k $132.3k $132.3k 0.00% Added +10.0k +10,000
26 Stonepine Capital Management, LLC 0.09% of their portfolio Bend, OR 30,12230.1k $122.6k $122.6k 0.09% Added +9.7k +9,722
27 Connor, Clark & Lunn Investment Management Ltd. 0.00% of their portfolio VANCOUVER, A1 30,00730.0k $122.1k $122.1k 0.00% Added +16.4k +16,352
28 Trexquant Investment LP 0.00% of their portfolio STAMFORD, CT 29,73729.7k $121.0k $121.0k 0.00% New
29 STATE STREET CORP 0.00% of their portfolio BOSTON, MA 26,51026.5k $107.9k $107.9k 0.00% Unchanged
30 NORTHERN TRUST CORP 0.00% of their portfolio CHICAGO, IL 25,83925.8k $105.2k $105.2k 0.00% Added +11.4k +11,390
31 Velan Capital Investment Management LP 0.06% of their portfolio ALPHARETTA, GA 25,00025.0k $101.8k $101.8k 0.06% Added +7.0k +7,000
32 TWO SIGMA INVESTMENTS, LP 0.00% of their portfolio NEW YORK, NY 23,84723.8k $97.1k $97.1k 0.00% Reduced -6.8k -6,803
33 WealthTrust Asset Management, LLC 0.04% of their portfolio Destin, FL 20,41620.4k $83.1k $83.1k 0.04% Added +8.0k +8,000
34 Independent Advisor Alliance 0.00% of their portfolio CHARLOTTE, NC 18,12518.1k $73.8k $73.8k 0.00% Added +3.9k +3,895
35 RBF Capital, LLC 0.00% of their portfolio RENO, NV 17,39117.4k $70.8k $70.8k 0.00% Unchanged
36 Quadrature Capital Ltd 0.00% of their portfolio LONDON, X0 16,52716.5k $67.3k $67.3k 0.00% New
37 GOLDMAN SACHS GROUP INC 0.00% of their portfolio NEW YORK, NY 16,05416.1k $65.3k $65.3k 0.00% Reduced -94.4k -94,449
38 DIMENSIONAL FUND ADVISORS LP 0.00% of their portfolio AUSTIN, TX 15,95816.0k $65.0k $65.0k 0.00% New
39 SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio BALA CYNWYD, PA 14,22114.2k $57.9k $57.9k 0.00% Reduced -38.5k -38,463
40 HRT FINANCIAL LP 0.00% of their portfolio NEW YORK, NY 13,72313.7k $55.0k $55.0k 0.00% Added +2.1k +2,106
41 NANO CAP NEW MILLENNIUM GROWTH FUND L P 0.04% of their portfolio STATEN ISLAND, NY 12,50012.5k $50.9k $50.9k 0.04% Added +8.5k +8,500
42 Virtu Financial LLC 0.00% of their portfolio New York, NY 10,84510.8k $44.0k $44.0k 0.00% New
43 Sigma Planning Corp 0.00% of their portfolio ANN ARBOR, MI 10,16710.2k $41.4k $41.4k 0.00% New
44 FMR LLC 0.00% of their portfolio BOSTON, MA 7,8067.8k $31.8k $31.8k 0.00% Unchanged
45 Integrated Wealth Concepts LLC 0.00% of their portfolio WALTHAM, MA 5,0005.0k $20.4k $20.4k 0.00% New
46 Tower Research Capital LLC (TRC) 0.00% of their portfolio NEW YORK, NY 2,5602.6k $10.4k $10.4k 0.00% Added +2.4k +2,421
47 Steward Partners Investment Advisory, LLC 0.00% of their portfolio STAMFORD, CT 2,2152.2k $9.0k $9.0k 0.00% Unchanged
48 Vanguard Global Advisers, LLC 0.00% of their portfolio MALVERN, PA 725725 $3.0k $3.0k 0.00% Unchanged
49 BARCLAYS PLC 0.00% of their portfolio LONDON, X0 303303 $1.2k $1.2k 0.00% Reduced -5.0k -4,977
50 Strengthening Families & Communities, LLC 0.00% of their portfolio BOSTON, MA 268268 $1.1k $1.1k 0.00% Unchanged
51 BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio PARIS, I0 5252 $212 $212 0.00% Reduced -600 -600
52 JPMORGAN CHASE & CO 0.00% of their portfolio NEW YORK, NY 5050 $211 $211 0.00% Unchanged
53 Parallel Advisors, LLC 0.00% of their portfolio SAN FRANCISCO, CA 4949 $199 $199 0.00% Unchanged
54 HARBOUR INVESTMENTS, INC. 0.00% of their portfolio MADISON, WI 1313 $53 $53 0.00% Unchanged
55 ROYAL BANK OF CANADA 0.00% of their portfolio TORONTO, A6 1212 $0 $0 0.00% Reduced -91 -91
56 Caitong International Asset Management Co., Ltd 0.00% of their portfolio HONG KONG, K3 77 $28 $28 0.00% New
57 SBI Securities Co., Ltd. 0.00% of their portfolio TOKYO, M0 55 $20 $20 0.00% Unchanged