Vault-13

JASPER THERAPEUTICS INC JSPR

COM NEW · Common Stock · CUSIP 471871202 · ISIN US4718712023

60 institutional holders -6 vs Q2 2025
19,546,78419.5m shares reported held*
69.8% of all shares outstanding*
$46.4mreported value*
15 new 16 added 19 reduced 20 sold out net bought ≈ $18.1m (+7.6m 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 ($1.4m this quarter). Holder counts are more reliable. Shares outstanding: 28.0m as of 2025-11-06, 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 ≈ $2.37. Options: 4 managers hold calls ($315.2k notional), 4 hold puts ($124.7k).

Trends to Q3 2025

Institutional holders

Managers reporting a position, each quarter

050100Q4 23: 1Q1 24: 62Q2 24: 70Q3 24: 82Q4 24: 89Q1 25: 70Q2 25: 66Q3 25: 6060Q4 23Q2 24Q4 24Q2 25Q3 25
Numbers
QuarterHolders
Q4 20231
Q1 202462
Q2 202470
Q3 202482
Q4 202489
Q1 202570
Q2 202566
Q3 202560

Buyers vs sellers

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

Bought or addedCut or sold out
1000100Q1 24: 61 bought or addedQ1 24: 1 cut or sold outQ1 24Q2 24: 41 bought or addedQ2 24: 30 cut or sold outQ3 24: 45 bought or addedQ3 24: 32 cut or sold outQ3 24Q4 24: 47 bought or addedQ4 24: 30 cut or sold outQ1 25: 31 bought or addedQ1 25: 52 cut or sold outQ1 25Q2 25: 33 bought or addedQ2 25: 37 cut or sold outQ3 25: 31 bought or addedQ3 25: 39 cut or sold outQ3 25
Numbers
QuarterBought or addedCut or sold out
Q1 2024611
Q2 20244130
Q3 20244532
Q4 20244730
Q1 20253152
Q2 20253337
Q3 20253139

Calls vs puts

Options held, notional value, last 4 quarters. P/C = puts ÷ calls

CallsPuts
$0$2m$4m$6m$8mQ4 24 calls: $6.8mQ4 24 puts: $2.8mQ4 24P/C 0.41Q1 25 calls: $179.5kQ1 25 puts: $95.5kQ1 25P/C 0.53Q2 25 calls: $232.3kQ2 25 puts: $302.5kQ2 25P/C 1.30Q3 25 calls: $315.2kQ3 25 puts: $124.7kQ3 25P/C 0.40
Numbers
QuarterCallsPutsP/C
Q4 2024$6.8m$2.8m0.41
Q1 2025$179.5k$95.5k0.53
Q2 2025$232.3k$302.5k1.30
Q3 2025$315.2k$124.7k0.40

Biggest buyers

ACORN CAPITAL ADVISORS, LLC New +1,382,640+1.4m
Velan Capital Investment Management LP Added +1,234,567+1.2m
Woodline Partners LP New +1,039,751+1.0m
Propel Bio Management, LLC New +1,028,806+1.0m
KINGDON CAPITAL MANAGEMENT, L.L.C. Added +640,138+640.1k
SPHERA FUNDS MANAGEMENT LTD. Added +614,799+614.8k
Simplify Asset Management Inc. New +609,053+609.1k
Rock Springs Capital Management LP Added +555,555+555.6k
BOOTHBAY FUND MANAGEMENT, LLC New +442,642+442.6k
VANGUARD GROUP INC Added +408,245+408.2k

Biggest sellers

Integral Health Asset Management, LLC Sold out -590,000-590.0k
FRANKLIN RESOURCES INC Sold out -534,713-534.7k
UBS Group AG Reduced -376,921-376.9k
GOLDMAN SACHS GROUP INC Reduced -222,903-222.9k
JANE STREET GROUP, LLC Sold out -132,905-132.9k
JPMORGAN CHASE & CO Reduced -64,670-64.7k
MARSHALL WACE, LLP Sold out -50,686-50.7k
BANK OF MONTREAL /CAN/ Reduced -46,331-46.3k
AQR CAPITAL MANAGEMENT LLC Sold out -35,533-35.5k
ROYAL BANK OF CANADA Reduced -32,689-32.7k

Biggest calls

SIMPLEX TRADING, LLC Added $130.0k54.9k shares
CITADEL ADVISORS LLC New $105.9k44.5k shares
SUSQUEHANNA INTERNATIONAL GROUP, LLP Reduced $62.1k26.1k shares
GROUP ONE TRADING LLC Reduced $17.1k7.2k shares

Biggest puts

SUSQUEHANNA INTERNATIONAL GROUP, LLP Reduced $61.6k25.9k shares
CITADEL ADVISORS LLC Reduced $41.4k17.4k shares
GROUP ONE TRADING LLC Added $21.7k9.1k shares
SIMPLEX TRADING, LLC Added $0200 shares

Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.

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
Velan Capital Investment Management LP 13G · passive investor no change · filed 2026-08-17 9.9% no change 3.4m≈ $1.4m 2026-08-17
T. Rowe Price Investment Management, Inc. 13G · institution new · filed 2025-11-14 7.1% new 2.1m≈ $866.3k 2025-11-14
BANK OF AMERICA CORP /DE/ 13G · institution new · filed 2026-10-28 6.4% new 2.1m≈ $898.4k 2026-10-28
ACORN BIOVENTURES, L.P. 13G · passive investor -1.1 pts · filed 2026-01-26 5.3% -1.1 pts 1.5m≈ $625.8k 2026-01-26

Fell to 5% or below in the last year: INTEGRATED CORE STRATEGIES (US) LLC (1.7%, 2026-07-10), MORGAN STANLEY (4.8%, 2026-05-12), GOLDMAN SACHS GROUP INC (0.5%, 2026-05-08), Soleus Capital Master Fund, L.P. (1.0%, 2026-05-08), Carlyle Group Inc. (3.8%, 2026-02-18)

Insider purchases and sales in Q3 2025

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 23: 1 buyingQ4 23: 1 sellingQ1 24: 0 buyingQ1 24: 1 sellingQ1 24Q2 24: 0 buyingQ2 24: 1 sellingQ3 24: 0 buyingQ3 24: 1 sellingQ3 24Q4 24: 0 buyingQ4 24: 1 sellingQ1 25: 0 buyingQ1 25: 0 sellingQ1 25Q2 25: 0 buyingQ2 25: 0 sellingQ3 25: 4 buyingQ3 25: 0 sellingQ3 25
Numbers
QuarterBuyingBoughtSellingSoldSold under a plan
Q4 20231$31.2k1$6.8k$6.8k
Q1 20240—1$23.8k—
Q2 20240—1$21.7k$21.7k
Q3 20240—1$19.1k$19.1k
Q4 20240—1$19.9k$19.9k
Q1 20250—0——
Q2 20250—0——
Q3 20254$148.2k0——
DateInsiderTradeSharesPrice ValueTheir holding
2025-09-22 Shizuru Judith Anne Director Bought 41,000 $2.43 $99.6k41.0k shares +35%
2025-09-22 MARTELL RON President and CEO, director Bought 41,000 $2.43 $99.6k41.0k shares +124%
2025-09-22 WIGGANS THOMAS G Director · By Wiggans Living Trust Bought 41,000 $2.43 $99.6k41.0k shares new
2025-09-22 Lucas Svetlana Director Bought 20,000 $2.43 $48.6k20.0k shares new

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, Q3 2025

#ManagerLocationShares Value% of their portfolioChangeShares change
1 Velan Capital Investment Management LP 5.83% of their portfolio ALPHARETTA, GA 2,668,3952.7m $6.2m $6.2m 5.83% Added +1.2m +1,234,567
2 Soleus Capital Management, L.P. 0.19% of their portfolio GREENWICH, CT 1,494,4201.5m $3.6m $3.6m 0.19% Unchanged
3 ACORN CAPITAL ADVISORS, LLC 1.67% of their portfolio NEW YORK, NY 1,382,6401.4m $3.3m $3.3m 1.67% New
4 KINGDON CAPITAL MANAGEMENT, L.L.C. 0.49% of their portfolio NEW YORK, NY 1,324,8451.3m $3.2m $3.2m 0.49% Added +640.1k +640,138
5 Rock Springs Capital Management LP 0.15% of their portfolio Baltimore, MD 1,100,7261.1m $2.6m $2.6m 0.15% Added +555.6k +555,555
6 Carlyle Group Inc. 0.06% of their portfolio WASHINGTON, DC 1,066,1891.1m $2.5m $2.5m 0.06% Unchanged
7 Woodline Partners LP 0.01% of their portfolio San Francisco, CA 1,039,7511.0m $2.5m $2.5m 0.01% New
8 VANGUARD GROUP INC 0.00% of their portfolio Valley Forge, PA 1,032,8421.0m $2.5m $2.5m 0.00% Added +408.2k +408,245
9 T. Rowe Price Investment Management, Inc. 0.00% of their portfolio BALTIMORE, MD 1,028,8061.0m $2.4m $2.4m 0.00% Added +325.2k +325,158
10 Propel Bio Management, LLC 2.45% of their portfolio Los Angeles, CA 1,028,8061.0m $2.4m $2.4m 2.45% New
11 QIMING U.S. VENTURES MANAGEMENT, LLC 3.97% of their portfolio BELLEVUE, WA 928,964929.0k $2.2m $2.2m 3.97% Unchanged
12 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 789,960790.0k $1.9m $1.9m 0.00% Added +20.2k +20,210
13 SPHERA FUNDS MANAGEMENT LTD. 0.36% of their portfolio TEL AVIV, L3 629,470629.5k $1.5m $1.5m 0.36% Added +614.8k +614,799
14 Simplify Asset Management Inc. 0.03% of their portfolio Las Vegas, NV 609,053609.1k $1.4m $1.4m 0.03% New
15 CITADEL ADVISORS LLC 0.00% of their portfolio MIAMI, FL 589,449589.4k $1.4m $1.4m 0.00% Added +179.0k +179,005
16 BOOTHBAY FUND MANAGEMENT, LLC 0.03% of their portfolio NEW YORK, NY 442,642442.6k $1.1m $1.1m 0.03% New
17 Lion Point Capital, LP 5.39% of their portfolio NEW YORK, NY 398,558398.6k $948.6k $948.6k 5.39% Added +252.1k +252,058
18 MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio NEW YORK, NY 364,939364.9k $868.6k $868.6k 0.00% Added +219.7k +219,720
19 ARMISTICE CAPITAL, LLC 0.03% of their portfolio NEW YORK, NY 348,000348.0k $828.2k $828.2k 0.03% New
20 BANK OF AMERICA CORP /DE/ 0.00% of their portfolio CHARLOTTE, NC 294,553294.6k $701.0k $701.0k 0.00% Added +1.1k +1,093
21 RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio NEW YORK, NY 208,500208.5k $496.2k $496.2k 0.00% Added +198.1k +198,100
22 BlackRock, Inc. 0.00% of their portfolio New York, NY 204,932204.9k $487.7k $487.7k 0.00% Reduced -20.7k -20,673
23 Knott David M Jr 0.17% of their portfolio SYOSSET, NY 171,389171.4k $407.9k $407.9k 0.17% New
24 DEUTSCHE BANK AG\ 0.00% of their portfolio FRANKFURT AM MAIN, 2M 160,000160.0k $380.8k $380.8k 0.00% Unchanged
25 GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio BOSTON, MA 130,855130.9k $311.6k $311.6k 0.00% Reduced -275 -275
26 BANK OF MONTREAL /CAN/ 0.00% of their portfolio TORONTO, A6 111,802111.8k $266.1k $266.1k 0.00% Reduced -46.3k -46,331
27 READYSTATE ASSET MANAGEMENT LP 0.01% of their portfolio CHICAGO, IL 98,43998.4k $234.3k $234.3k 0.01% New
28 IEQ CAPITAL, LLC 0.00% of their portfolio Foster City, CA 48,11848.1k $114.5k $114.5k 0.00% New
29 STATE STREET CORP 0.00% of their portfolio BOSTON, MA 44,69944.7k $106.4k $106.4k 0.00% Reduced -55 -55
30 OSAIC HOLDINGS, INC. 0.00% of their portfolio SCOTTSDALE, AZ 41,68741.7k $99.7k $99.7k 0.00% Added +40.9k +40,850
31 TWO SIGMA INVESTMENTS, LP 0.00% of their portfolio NEW YORK, NY 40,42740.4k $96.2k $96.2k 0.00% New
32 UBS Group AG 0.00% of their portfolio ZURICH, V8 39,35439.4k $93.7k $93.7k 0.00% Reduced -376.9k -376,921
33 DIMENSIONAL FUND ADVISORS LP 0.00% of their portfolio AUSTIN, TX 38,96339.0k $92.7k $92.7k 0.00% Reduced -5.7k -5,698
34 SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio BALA CYNWYD, PA 35,59235.6k $84.7k $84.7k 0.00% Reduced -25.3k -25,294
35 NORTHERN TRUST CORP 0.00% of their portfolio CHICAGO, IL 33,91233.9k $80.7k $80.7k 0.00% Reduced -996 -996
36 GOLDMAN SACHS GROUP INC 0.00% of their portfolio NEW YORK, NY 26,89026.9k $64.0k $64.0k 0.00% Reduced -222.9k -222,903
37 Ikarian Capital, LLC 0.01% of their portfolio DALLAS, TX 25,10725.1k $59.8k $59.8k 0.01% Unchanged
38 Voleon Capital Management LP 0.00% of their portfolio BERKELEY, CA 20,95020.9k $49.9k $49.9k 0.00% New
39 Stonepine Capital Management, LLC 0.04% of their portfolio Bend, OR 20,20020.2k $48.1k $48.1k 0.04% New
40 GROUP ONE TRADING LLC 0.00% of their portfolio CHICAGO, IL 17,55017.6k $41.8k $41.8k 0.00% New
41 Squarepoint Ops LLC 0.00% of their portfolio NEW YORK, NY 13,96014.0k $33.2k $33.2k 0.00% Reduced -11.4k -11,419
42 Sequent Planning LLC 0.01% of their portfolio OMAHA, NE 12,50012.5k $29.8k $29.8k 0.01% Added +2.0k +2,000
43 Mariner, LLC 0.00% of their portfolio Overland Park, KS 12,19312.2k $29.0k $29.0k 0.00% Reduced -13.3k -13,320
44 FMR LLC 0.00% of their portfolio BOSTON, MA 11,89911.9k $28.3k $28.3k 0.00% Reduced -7.0k -6,957
45 Sowell Financial Services LLC 0.00% of their portfolio NORTH LITTLE ROCK, AR 10,40010.4k $24.8k $24.8k 0.00% Reduced -6.9k -6,903
46 Crewe Advisors LLC 0.00% of their portfolio SALT LAKE CITY, UT 3,1003.1k $7.4k $7.4k 0.00% Unchanged
47 ROYAL BANK OF CANADA 0.00% of their portfolio TORONTO, A6 2,9272.9k $7.0k $7.0k 0.00% Reduced -32.7k -32,689
48 FEDERATED HERMES, INC. 0.00% of their portfolio PITTSBURGH, PA 2,7972.8k $6.7k $6.7k 0.00% Added +820 +820
49 WELLS FARGO & COMPANY/MN 0.00% of their portfolio SAN FRANCISCO, CA 2,3002.3k $5.5k $5.5k 0.00% Reduced -179 -179
50 US BANCORP \DE\ 0.00% of their portfolio MINNEAPOLIS, MN 500500 $1.2k $1.2k 0.00% Unchanged
51 JPMORGAN CHASE & CO 0.00% of their portfolio NEW YORK, NY 418418 $994 $994 0.00% Reduced -64.7k -64,670
52 BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio PARIS, I0 141141 $336 $336 0.00% Reduced -140 -140
53 IFP Advisors, Inc 0.00% of their portfolio TAMPA, FL 122122 $290 $290 0.00% Added +2 +2
54 NATIONAL BANK OF CANADA /FI/ 0.00% of their portfolio MONTREAL, A8 8080 $190 $190 0.00% Unchanged
55 SBI Securities Co., Ltd. 0.00% of their portfolio TOKYO, M0 6666 $157 $157 0.00% Reduced -85 -85
56 JONES FINANCIAL COMPANIES LLLP 0.00% of their portfolio DES PERES, MO 5050 $124 $124 0.00% New
57 Optiver Holding B.V. 0.00% of their portfolio AMSTERDAM, P7 66 $14 $14 0.00% New
58 Rossby Financial, LCC 0.00% of their portfolio MELBOURNE, FL 22 $5 $5 0.00% Unchanged
59 BARCLAYS PLC 0.00% of their portfolio LONDON, X0 11 $2 $2 0.00% Unchanged
60 Tower Research Capital LLC (TRC) 0.00% of their portfolio NEW YORK, NY 11 $2 $2 0.00% Reduced -3.7k -3,746