JSPR · Jasper Therapeutics, Inc. · Holdings

$0.66 -0.04 (-5.77%) At close · Sep 11

Market Cap

$21.97M

33.27M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Use institutional holdings through the 13F API or MCP →

Quarter:

Holders: 52

Total Value: $5,184,065

Total Shares: 15,310,914

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 52 13F filers · Δ vs Mar 31, 2026

Top Holder

21.7%

+5.0 pts

Top 5

62.8%

+10.3 pts

Top 10

85.7%

+5.7 pts

HHI

1,042

Broadly held+249

Quarterly Activity

vs Mar 31, 2026

New

Increased

Decreased

Sold Out

Unchanged

Holder count: -12

Institutional value: -62.9%

Shares held: -19.3%

Top Buyers

vs Mar 31, 2026

Institution	Added	Now Holds
Mid GSA CAPITAL PARTNERS LLP	+515,613	534,697
Mega CITADEL ADVISORS LLC	+154,300	228,400
Mega JANE STREET GROUP, LLC	+84,828	185,343
Large RENAISSANCE TECHNOLOGIES LLC	+60,400	237,900
Large Jain Global LLC	+33,163	51,185

Top Sellers

vs Mar 31, 2026

Institution	Sold	Now Holds
Mega MORGAN STANLEY	−1,331,696	1,724
Mega MILLENNIUM MANAGEMENT LLC	−1,130,598	486,933
Mid BOOTHBAY FUND MANAGEMENT, LLC	−582,751	357,447
Mega BANK OF AMERICA CORP /DE/	−279,067	14,192
Mega BlackRock, Inc.	−72,434	169,627

Top New Positions

vs Mar 31, 2026

Institution	Acquired	Value (USD)
Mega Qube Research & Technologies Ltd	33,722	$14,196
Mid Arax Advisory Partners	573	$241
Mega SG Americas Securities, LLC	10,556	$4

Top Sold-Out Positions

vs Mar 31, 2026

Institution	Previously Held	Last Value (USD)
Large JACOBS LEVY EQUITY MANAGEMENT, INC	322,273	$282,311
Mid Soleus Capital Management, L.P.	276,312	$242,049
Small Knott David M Jr	160,789	$140,851
Small Verdad Advisers, LP	73,967	$64,795
Large Squarepoint Ops LLC	64,915	$56,865

Filter: New 3 Increased 11 Reduced 17 Sold out 15 Unchanged 21

Showing 55 of 55

All Common Calls Puts

Compact Export CSV

Holder

Value (USD)

% of 13F

Velan Capital Investment Management LP

$1,123,394

21.67%

2,668,395

ACORN CAPITAL ADVISORS, LLC

$605,464

11.68%

1,438,159

KINGDON CAPITAL MANAGEMENT, L.L.C.

$569,236

10.98%

1,352,106

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Manager 1 joint	1,352,106	$569,236	100.0%	Defined

VANGUARD CAPITAL MANAGEMENT LLC

$493,420

9.52%

1,172,021

Rock Springs Capital Management LP

$463,405

8.94%

1,100,726

Carlyle Group Inc.

$448,865

8.66%

1,066,189

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Abingworth LLP	1,066,189	$448,865	100.0%	Defined

GSA CAPITAL PARTNERS LLP

$225,107

4.34%

534,697

MILLENNIUM MANAGEMENT LLC

$204,998

3.95%

486,933

Lion Point Capital, LP

$195,765

3.78%

465,000

GEODE CAPITAL MANAGEMENT, LLC

$111,063

2.14%

263,808

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
GEODE CAPITAL MANAGEMENT TRUST COMPANY, LLC	51,905	$21,852	19.7%	Defined
Held directly	211,903	$89,211	80.3%	Defined

RENAISSANCE TECHNOLOGIES LLC

$100,155

1.93%

237,900

CITADEL ADVISORS LLC

$86,726

1.67%

206,000

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citadel Securities GP LLC	206,000	$86,726	100.0%	Defined

BlackRock, Inc.

$71,412

1.38%

169,627

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BlackRock Institutional Trust Company, N.A.	169,627	$71,412	100.0%	Sole

VANGUARD FIDUCIARY TRUST CO

$63,126

1.22%

149,943

ADAR1 Capital Management, LLC

$58,940

1.14%

140,000

Quarry LP

$55,373

1.07%

131,529

JANE STREET GROUP, LLC

$42,833

0.83%

101,743

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Jane Street Capital, LLC	50,696	$21,343	49.8%	Defined
Jane Street Global Trading, LLC	51,047	$21,490	50.2%	Defined

JANE STREET GROUP, LLC

$35,195

0.68%

83,600

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Jane Street Capital, LLC	83,600	$35,195	100.0%	Defined

UBS Group AG

$24,737

0.48%

58,759

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
UBS AG	38,414	$16,172	65.4%	Defined
UBS Switzerland AG	20,345	$8,565	34.6%	Defined

Jain Global LLC

$21,548

0.42%

51,185

OSAIC HOLDINGS, INC.

$19,302

0.37%

45,850

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
OSAIC WEALTH, INC.	5,000	$2,105	10.9%	Defined
Osaic Advisory Services, LLC	40,850	$17,197	89.1%	Defined

STATE STREET CORP

$18,818

0.36%

44,699

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
STATE STREET GLOBAL ADVISORS TRUST COMPANY	44,699	$18,818	100.0%	Defined

NORTHERN TRUST CORP

$17,632

0.34%

41,882

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
NORTHERN TRUST CO joint	41,882	$17,632	100.0%	Defined

DIKER MANAGEMENT LLC

$14,735

0.28%

35,000

Qube Research & Technologies Ltd

$14,196

0.27%

33,722

XTX Topco Ltd

$14,063

0.27%

33,406

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
XTX EXECUTION SERVICES LLC joint	33,406	$14,063	100.0%	Defined

SIMPLEX TRADING, LLC

$12,036

0.23%

28,591

Ikarian Capital, LLC

$10,143

0.20%

24,093

CITADEL ADVISORS LLC

$9,430

0.18%

22,400

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citadel Securities GP LLC	22,400	$9,430	100.0%	Defined

GROUP ONE TRADING LLC

$8,390

0.16%

19,930

Rehmann Capital Advisory Group

$6,441

0.12%

15,300

Sequent Planning LLC

$6,272

0.12%

14,900

BANK OF AMERICA CORP /DE/

$5,974

0.12%

14,192

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BANK OF AMERICA NA	14,192	$5,974	100.0%	Defined

IEQ CAPITAL, LLC

$5,699

0.11%

13,538

Engineers Gate Manager LP

$5,468

0.11%

12,989

LPL Financial LLC

$5,157

0.10%

12,250

SUSQUEHANNA INTERNATIONAL GROUP, LLP

$4,336

0.08%

10,300

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SUSQUEHANNA SECURITIES, LLC	10,300	$4,336	100.0%	Other

Tower Research Capital LLC (TRC)

$3,930

0.08%

9,336

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Latour Trading LLC (Latour)	9,336	$3,930	100.0%	Defined

MORGAN STANLEY

$725

0.01%

1,724

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
MORGAN STANLEY & CO INTERNATIONAL PLC	31	$13	1.8%	Defined
MORGAN STANLEY & CO. LLC	1,493	$628	86.6%	Defined
MORGAN STANLEY SMITH BARNEY LLC	200	$84	11.6%	Defined

Arax Advisory Partners

$241

0.00%

573

FEDERATED HERMES, INC.

$79

0.00%

189

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
FEDERATED MDTA LLC	189	$79	100.0%	Defined

NATIONAL BANK OF CANADA /FI/

$67

0.00%

160

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
National Bank Financial Inc.	160	$67	100.0%	Defined

BNP PARIBAS ARBITRAGE, SA

$59

0.00%

141

JPMORGAN CHASE & CO JSPRW

$40

0.00%

2,941

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
J.P. Morgan Securities LLC	2,941	$40	100.0%	Defined

SBI Securities Co., Ltd.

$26

0.00%

JONES FINANCIAL COMPANIES LLLP

$21

0.00%

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Edward D. Jones & Co., L.P.	50	$21	100.0%	Sole

ROYAL BANK OF CANADA

$16

0.00%

SG Americas Securities, LLC

0.00%

10,556

JPMORGAN CHASE & CO

0.00%

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
J.P. Morgan Securities plc	9	$3	100.0%	Defined

Caitong International Asset Management Co., Ltd

0.00%

TENOR CAPITAL MANAGEMENT Co., L.P. JSPRW

—

250,000

Walleye Capital LLC JSPRW

—

200,000

TORONTO DOMINION BANK JSPRW

—

2,174,682

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
TD SECURITIES (USA) LLC	2,174,682	$0	—	Defined

WOLVERINE ASSET MANAGEMENT LLC JSPRW

—

1,639

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Wolverine Holdings, LLC	1,639	$0	—	Defined

BOOTHBAY FUND MANAGEMENT, LLC JSPRW

—

357,447

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Dorset Partners LLC	160,789	$140,851	100.0%	Defined

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Squarepoint Capital LLP	64,915	$56,865	100.0%	Defined

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Marshall Wace North America L.P. joint	45,656	$39,994	100.0%	Other

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Dimensional Ireland Ltd	5,769	$5,053	30.9%	Defined
Held directly	12,895	$11,296	69.1%	Sole

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
WELLS FARGO CLEARING SERVICES, LLC	500	$438	100.0%	Defined

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
US BANK NATIONAL ASSOCIATION	500	$438	100.0%	Defined

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Optiver VOF	7	$6	100.0%	Defined

Key facts CIK 1788028 CUSIP 471871202 13F (30d) 24 filings 24 filers Visit website Investor relations