JASPER THERAPEUTICS INC JSPR
COM NEW · Common Stock · CUSIP 471871202 · ISIN US4718712023
- SectorHealth care
- IndustryBiological Products, (No Diagnostic Substances)
- HeadquartersRedwood City, CA
- FilingsSEC EDGAR
* 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 ($476.3k this quarter). Holder counts are more reliable. Shares outstanding: 15.0m as of 2025-02-25, 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 ≈ $21.37. Options: 7 managers hold calls ($6.8m notional), 8 hold puts ($2.8m).
Trends to Q4 2024
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q4 2023 | 1 |
| Q1 2024 | 62 |
| Q2 2024 | 70 |
| Q3 2024 | 82 |
| Q4 2024 | 89 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q1 2024 | 61 | 1 |
| Q2 2024 | 41 | 30 |
| Q3 2024 | 45 | 32 |
| Q4 2024 | 47 | 30 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q1 2024 | $4.3m | $854.9k | 0.20 |
| Q2 2024 | $3.2m | $1.0m | 0.32 |
| Q3 2024 | $3.4m | $1.4m | 0.41 |
| Q4 2024 | $6.8m | $2.8m | 0.41 |
Biggest buyers
| FMR LLC | Added | +350.2k |
| Integral Health Asset Management, LLC | Added | +300.0k |
| CITADEL ADVISORS LLC | Added | +282.0k |
| BRAIDWELL LP | Added | +231.4k |
| UBS Group AG | Added | +159.0k |
| GOLDMAN SACHS GROUP INC | Added | +154.5k |
| Soleus Capital Management, L.P. | Added | +150.8k |
| STEMPOINT CAPITAL LP | New | +135.2k |
| T. Rowe Price Investment Management, Inc. | New | +82.2k |
| SCHRODER INVESTMENT MANAGEMENT GROUP | New | +59.0k |
Biggest sellers
| Polar Capital Holdings Plc | Sold out | -581.5k |
| Boxer Capital, LLC | Sold out | -350.0k |
| Ally Bridge Group (NY) LLC | Reduced | -277.0k |
| Woodline Partners LP | Reduced | -249.4k |
| SPHERA FUNDS MANAGEMENT LTD. | Reduced | -53.5k |
| KINGDON CAPITAL MANAGEMENT, L.L.C. | Reduced | -50.0k |
| BANK OF AMERICA CORP /DE/ | Reduced | -38.7k |
| JPMORGAN CHASE & CO | Reduced | -27.6k |
| AlphaCentric Advisors LLC | Sold out | -17.5k |
| ADAR1 Capital Management, LLC | Sold out | -15.8k |
Biggest calls
| Caption Management, LLC | New | $2.6m122.6k shares |
| MILLENNIUM MANAGEMENT LLC | New | $1.4m65.0k shares |
| SPHERA FUNDS MANAGEMENT LTD. | Unchanged | $1.3m61.1k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $947.1k44.3k shares |
| SIMPLEX TRADING, LLC | Added | $525.0k24.6k shares |
| CITADEL ADVISORS LLC | Reduced | $32.1k1.5k shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 shares |
Biggest puts
| SPHERA FUNDS MANAGEMENT LTD. | New | $1.7m77.5k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $463.9k21.7k shares |
| MILLENNIUM MANAGEMENT LLC | New | $359.2k16.8k shares |
| CITADEL ADVISORS LLC | Added | $273.7k12.8k shares |
| GROUP ONE TRADING LLC | New | $8.6k400 shares |
| SIMPLEX TRADING, LLC | Reduced | $2.0k100 shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 shares |
| 683 Capital Management, LLC | New | $057.6k 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.
| Holder | Stake |
|---|---|
| Velan Capital Investment Management LP 13G · passive investor no change · filed 2026-08-17 | 9.9% |
| T. Rowe Price Investment Management, Inc. 13G · institution new · filed 2025-11-14 | 7.1% |
| BANK OF AMERICA CORP /DE/ 13G · institution new · filed 2026-10-28 | 6.4% |
| ACORN BIOVENTURES, L.P. 13G · passive investor -1.1 pts · filed 2026-01-26 | 5.3% |
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 Q4 2024
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)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q1 2023 | 0 | — | 0 | — | — |
| Q2 2023 | 0 | — | 4 | $51.1k | $14.9k |
| Q3 2023 | 0 | — | 0 | — | — |
| Q4 2023 | 1 | $31.2k | 1 | $6.8k | $6.8k |
| Q1 2024 | 0 | — | 1 | $23.8k | — |
| Q2 2024 | 0 | — | 1 | $21.7k | $21.7k |
| Q3 2024 | 0 | — | 1 | $19.1k | $19.1k |
| Q4 2024 | 0 | — | 1 | $19.9k | $19.9k |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2024-12-12 | Mahal Jeetinder Singh Chief Operating Officer | Sold plan | $19.9k900 shares |
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, Q4 2024
| Manager | Shares | Change |
|---|---|---|
| Soleus Capital Management, L.P. 2.42% of their portfolio | 1.5m $32.0m | Added +150.8k |
| Velan Capital Investment Management LP 26.45% of their portfolio | 1.4m $30.7m | Unchanged |
| Carlyle Group Inc. 0.55% of their portfolio | 1.1m $22.7m | Unchanged |
| QIMING U.S. VENTURES MANAGEMENT, LLC 38.83% of their portfolio | 929.0k $19.9m | Unchanged |
| BlackRock, Inc. 0.00% of their portfolio | 808.1k $17.3m | Added +8.1k |
| BRAIDWELL LP 0.45% of their portfolio | 714.7k $15.3m | Added +231.4k |
| VANGUARD GROUP INC 0.00% of their portfolio | 709.5k $15.2m | Added +15.1k |
| Integral Health Asset Management, LLC 1.23% of their portfolio | 650.0k $13.9m | Added +300.0k |
| MORGAN STANLEY 0.00% of their portfolio | 604.8k $12.9m | Added +39.1k |
| SAMSARA BIOCAPITAL, LLC 1.72% of their portfolio | 584.6k $12.5m | Unchanged |
| FRANKLIN RESOURCES INC 0.00% of their portfolio | 579.6k $12.4m | Unchanged |
| Rock Springs Capital Management LP 0.38% of their portfolio | 463.1k $9.9m | Added +4.0k |
| KINGDON CAPITAL MANAGEMENT, L.L.C. 1.63% of their portfolio | 447.0k $9.6m | Reduced -50.0k |
| CITADEL ADVISORS LLC 0.01% of their portfolio | 423.6k $9.1m | Added +282.0k |
| Opaleye Management Inc. 1.50% of their portfolio | 400.0k $8.6m | Added +46.5k |
| FMR LLC 0.00% of their portfolio | 388.5k $8.3m | Added +350.2k |
| Boxer Capital Management, LLC 0.64% of their portfolio | 350.0k $7.5m | First filing |
| GREAT POINT PARTNERS LLC 3.25% of their portfolio | 322.4k $6.9m | Unchanged |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 287.2k $6.1m | Reduced -38.7k |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 257.7k $5.5m | Added +271 |
| Russell Investments Group, Ltd. 0.01% of their portfolio | 247.3k $5.3m | Added +35.7k |
| Woodline Partners LP 0.04% of their portfolio | 245.7k $5.3m | Reduced -249.4k |
| STATE STREET CORP 0.00% of their portfolio | 230.3k $4.9m | Added +15.4k |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 210.3k $4.5m | Added +154.5k |
| DEUTSCHE BANK AG\ 0.00% of their portfolio | 170.7k $3.6m | Added +39.4k |
| UBS Group AG 0.00% of their portfolio | 164.3k $3.5m | Added +159.0k |
| SPHERA FUNDS MANAGEMENT LTD. 0.54% of their portfolio | 135.7k $2.9m | Reduced -53.5k |
| STEMPOINT CAPITAL LP 0.73% of their portfolio | 135.2k $2.9m | New |
| Ally Bridge Group (NY) LLC 2.24% of their portfolio | 122.4k $2.6m | Reduced -277.0k |
| NORTHERN TRUST CORP 0.00% of their portfolio | 104.4k $2.2m | Reduced -2.6k |
| Nuveen Asset Management, LLC 0.00% of their portfolio | 83.4k $1.8m | Unchanged |
| T. Rowe Price Investment Management, Inc. 0.00% of their portfolio | 82.2k $1.8m | New |
| MARSHALL WACE, LLP 0.00% of their portfolio | 77.7k $1.7m | Added +11.4k |
| SCHRODER INVESTMENT MANAGEMENT GROUP 0.00% of their portfolio | 59.0k $1.2m | New |
| Ikarian Capital, LLC 0.34% of their portfolio | 55.1k $1.2m | Reduced -68 |
| Fernwood Investment Management, LLC 0.39% of their portfolio | 52.9k $1.1m | Unchanged |
| DIMENSIONAL FUND ADVISORS LP 0.00% of their portfolio | 37.7k $806.1k | Added +780 |
| Mariner, LLC 0.00% of their portfolio | 36.8k $786.7k | Reduced -5.4k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio | 32.3k $691.4k | Reduced -70 |
| Lion Point Capital, LP 3.58% of their portfolio | 32.0k $684.2k | Unchanged |
| Jefferies Financial Group Inc. 0.01% of their portfolio | 31.2k $668.1k | New |
| Palo Alto Investors LP 0.10% of their portfolio | 30.7k $655.3k | New |
| Sowell Financial Services LLC 0.03% of their portfolio | 28.0k $599.6k | New |
| WELLINGTON MANAGEMENT GROUP LLP 0.00% of their portfolio | 27.1k $578.7k | Added +3.3k |
| Bank of New York Mellon Corp 0.00% of their portfolio | 25.1k $536.2k | Added +1.0k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio | 22.8k $487.8k | Added +2.3k |
| Allostery Investments LP 0.92% of their portfolio | 22.0k $470.4k | First filing |
| Simplify Asset Management Inc. 0.03% of their portfolio | 20.0k $427.6k | New |
| Propel Bio Management, LLC 0.42% of their portfolio | 20.0k $427.6k | New |
| BARCLAYS PLC 0.00% of their portfolio | 18.3k $392.0k | Added +2.2k |
| AMERICAN CENTURY COMPANIES INC 0.00% of their portfolio | 18.0k $384.4k | Added +1.2k |
| Verition Fund Management LLC 0.00% of their portfolio | 15.1k $321.8k | Reduced -10.3k |
| RHUMBLINE ADVISERS 0.00% of their portfolio | 14.8k $315.6k | Added +1.7k |
| BOOTHBAY FUND MANAGEMENT, LLC 0.01% of their portfolio | 13.9k $296.2k | Added +1.6k |
| STATE OF WISCONSIN INVESTMENT BOARD 0.00% of their portfolio | 13.7k $293.4k | New |
| Tema ETFs LLC 0.11% of their portfolio | 12.4k $265.9k | First filing |
| JANE STREET GROUP, LLC 0.00% of their portfolio | 10.9k $232.0k | Reduced -2.5k |
| EntryPoint Capital, LLC 0.09% of their portfolio | 10.4k $223.0k | New |
| CITIGROUP INC 0.00% of their portfolio | 9.1k $193.7k | Added +895 |
| Leonteq Securities AG 0.02% of their portfolio | 8.0k $171.0k | Unchanged |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 7.4k $158.5k | Added +3.8k |
| MetLife Investment Management, LLC 0.00% of their portfolio | 6.9k $147.0k | Unchanged |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. 0.00% of their portfolio | 6.5k $139.3k | Added +304 |
| Corebridge Financial, Inc. 0.00% of their portfolio | 5.6k $120.3k | Reduced -425 |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 5.2k $110.4k | Reduced -27.6k |
| NEW YORK STATE COMMON RETIREMENT FUND 0.00% of their portfolio | 4.6k $98.3k | Unchanged |
| BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio | 2.9k $61.7k | Added +376 |
| WOLFF WIESE MAGANA LLC 0.04% of their portfolio | 2.9k $61.7k | Reduced -259 |
| Police & Firemen's Retirement System of New Jersey 0.00% of their portfolio | 2.3k $48.7k | First filing |
| Tower Research Capital LLC (TRC) 0.00% of their portfolio | 1.6k $33.2k | Added +860 |
| Legal & General Group Plc 0.00% of their portfolio | 1.2k $25.9k | Unchanged |
| Ameritas Investment Partners, Inc. 0.00% of their portfolio | 1.1k $23.7k | Unchanged |
| Creative Planning 0.00% of their portfolio | 1.0k $22.1k | New |
| OSAIC HOLDINGS, INC. 0.00% of their portfolio | 837 $17.9k | Unchanged |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio | 820 $17.5k | Unchanged |
| R Squared Ltd 0.01% of their portfolio | 720 $15.4k | First filing |
| US BANCORP \DE\ 0.00% of their portfolio | 511 $10.9k | Reduced -1 |
| GROUP ONE TRADING LLC 0.00% of their portfolio | 500 $10.7k | New |
| AMALGAMATED BANK 0.00% of their portfolio | 392 $8.0k | Unchanged |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 232 $5.0k | Reduced -1.3k |
| Greenline Partners, LLC 0.00% of their portfolio | 100 $2.1k | New |
| NISA INVESTMENT ADVISORS, LLC 0.00% of their portfolio | 53 $1.1k | Added +48 |
| CWM, LLC 0.00% of their portfolio | 20 $0 | Added +5 |
| LAZARD ASSET MANAGEMENT LLC 0.00% of their portfolio | 17 $0 | Unchanged |
| GAMMA Investing LLC 0.00% of their portfolio | 16 $342 | New |
| Sterling Capital Management LLC 0.00% of their portfolio | 12 $257 | Unchanged |
| SBI Securities Co., Ltd. 0.00% of their portfolio | 6 $128 | First filing |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. 0.00% of their portfolio | 0 $0 | Unchanged |
| IFP Advisors, Inc 0.00% of their portfolio | 0 $21 | New |