United States Biotechnology & Medical Research

Jasper Therapeutics Inc (JSPR)

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Jasper Therapeutics Inc. recorded significant insider buying on September 22, 2025, when four individuals acquired shares totaling substantial value. Prior to this, activity primarily involved planned sales by an executive officer throughout 2024. As these transactions occurred over three months ago, no assessment regarding current market performance or recent results financiers is provided.
Ticker: JSPR Exchange: NAS
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• Purchase • Sale • Planned purchase • Planned sale Net purchase Net sale Buy signal Sell signal Earnings
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Insider trades have triggered activity signals for Jasper Therapeutics Inc. Upgrade to see score, net flow, insiders and the full signal context.

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Top insiders
Trades
Abbreviations B: Buy, S: Sell, PP: Planned purchase, PlS: Planned sale, PrS: Proposed sale, O: Option / Other
2.7
WIGGANS THOMAS G Non-Executive Director
Transaction date
Purchase
Price
56.10
Quantity 22,358 -27.3%
Value US$659,059
0.8
MARTELL RON President and CEO Executive Director
Transaction date
Purchase
Price
430.37
Quantity 9,383 +48.3%
Value US$4,775,099
1.5
Lucas Svetlana Non-Executive Director
Transaction date
Purchase
Price
439.75
Quantity 17,430 +1.1%
Value US$1,576,955
0.8
Shizuru Judith Anne Non-Executive Director
Transaction date
Purchase
Price
2.43
Quantity 41,000 +35.4%
Value US$99,630
Jeetinder Singh Mahal Executive Officer Officer
Transaction date
Proposed sale
Price
22.47
Quantity 900
Value US$20,223
Mahal Jeetinder Singh Chief Operating Officer Officer
Transaction date
Planned sale
Price
22.11
Quantity 900 -3.5%
Value US$19,899
Jeetinder Singh Mahal Executive Officer Officer
Transaction date
Proposed sale
Price
20.66
Quantity 900
Value US$18,590
Mahal Jeetinder Singh Chief Operating Officer Officer
Transaction date
Planned sale
Price
21.23
Quantity 900 -3.5%
Value US$19,104
Jeetinder Singh Mahal Executive Officer Officer
Transaction date
Proposed sale
Price
23.99
Quantity 900
Value US$21,591
Mahal Jeetinder Singh Chief Operating Officer Officer
Transaction date
Planned sale
Price
24.16
Quantity 900 -3.5%
Value US$21,740
Jeetinder Singh Mahal Executive Officer Officer
Transaction date
Proposed sale
Price
26.52
Quantity 900
Value US$23,868
Mahal Jeetinder Singh Chief Operating Officer Officer
Transaction date
Planned sale
Price
26.44
Quantity 900 -3.5%
Value US$23,792
1.5
Lis William Director Non-Executive Director
Transaction date
Proposed sale
Price
21.03
Quantity 16,000
Value US$336,480
3.3
Carlyle Group Inc. Former 10% Owner
Transaction date
Purchase
Price
12.95
Quantity 190,000 +21.7%
Value US$2,460,500
2.7
WIGGANS THOMAS G Non-Executive Director
Transaction date
Purchase
Price
0.65
Quantity 10,000 +25.0%
Value US$6,486
2.7
WIGGANS THOMAS G Non-Executive Director
Transaction date
Purchase
Price
0.64
Quantity 10,000 +33.3%
Value US$6,383
2.7
WIGGANS THOMAS G Non-Executive Director
Transaction date
Purchase
Price
0.63
Quantity 10,000 +50.0%
Value US$6,309
2.7
WIGGANS THOMAS G Non-Executive Director
Transaction date
Purchase
Price
0.60
Quantity 10,000 +100.0%
Value US$5,966
2.7
WIGGANS THOMAS G Non-Executive Director
Transaction date
Purchase
Price
0.60
Quantity 10,000 +inf%
Value US$5,965
1.5
William Lis Director Non-Executive Director
Transaction date
Proposed sale
Price
0.85
Quantity 7,965
Value US$6,770
1.5
Lis William Non-Executive Director
Transaction date
Planned sale
Price
0.85
Quantity 7,965 -13.0%
Value US$6,777
Jeetinder Singh Mahal Executive Officer Officer
Transaction date
Proposed sale
Price
22.68
Quantity 9,000
Value US$204,120
Mahal Jeetinder Singh See Remarks Officer
Transaction date
Planned sale
Price
1.66
Quantity 9,000 -3.0%
Value US$14,915
2.1
French Anna Louise Director Non-Executive Director
Transaction date
Proposed sale
Price
1.48
Quantity 7,000
Value US$10,360
2.1
French Anna Louise Non-Executive Director
Transaction date
Sale
Price
1.48
Quantity 7,000 -22.8%
Value US$10,360
2.1
EMSTER KURT VON Non-Executive Director
Transaction date
Sale
Price
1.49
Quantity 9,075 -30.0%
Value US$13,524
1.5
Lis William Non-Executive Director
Transaction date
Sale
Price
1.44
Quantity 8,500 -12.1%
Value US$12,240
1.5
Lis William Director Non-Executive Director
Transaction date
Proposed sale
Price
1.44
Quantity 8,500
Value US$12,240
2.1
EMSTER KURT VON Officer Officer
Transaction date
Proposed sale
Price
1.49
Quantity 9,075
Value US$13,524
3.3
Carlyle Group Inc. Large shareholder
Transaction date
Purchase
Price
1.50
Quantity 3,133,333 +55.7%
Value US$4,700,000
3.1
ROCHE HOLDING LTD Large shareholder
Transaction date
Sale
Price
1.89
Quantity 75,000 -1.6%
Value US$141,750
1.5
Lis William Non-Executive Director
Transaction date
Planned sale
Price
2.08
Quantity 24,743 -37.9%
Value US$51,404
1.5
Lis William Non-Executive Director
Transaction date
Planned sale
Price
2.02
Quantity 24,743 -27.5%
Value US$50,030
2.9
GLAZER CAPITAL, LLC Large shareholder
Transaction date
Sale
Price
9.92
Quantity 151,719 -14.5%
Value US$1,505,052
2.9
GLAZER CAPITAL, LLC Large shareholder
Transaction date
Sale
Price
9.92
Quantity 1,164 -0.1%
Value US$11,547
2.9
GLAZER CAPITAL, LLC Large shareholder
Transaction date
Sale
Price
9.97
Quantity 2,060 -0.2%
Value US$20,538
2.9
GLAZER CAPITAL, LLC Large shareholder
Transaction date
Sale
Price
10.50
Quantity 698 -0.1%
Value US$7,329
2.9
GLAZER CAPITAL, LLC Large shareholder
Transaction date
Sale
Price
10.50
Quantity 2,112 -0.2%
Value US$22,176
2.9
GLAZER CAPITAL, LLC Large shareholder
Transaction date
Sale
Price
10.45
Quantity 10,000 -0.9%
Value US$104,500
2.9
GLAZER CAPITAL, LLC Large shareholder
Transaction date
Sale
Price
10.40
Quantity 212 -0.0%
Value US$2,205
2.9
GLAZER CAPITAL, LLC Large shareholder
Transaction date
Sale
Price
10.40
Quantity 101 -0.0%
Value US$1,050
2.9
GLAZER CAPITAL, LLC Large shareholder
Transaction date
Sale
Price
10.25
Quantity 10,000 -0.9%
Value US$102,500
2.9
GLAZER CAPITAL, LLC Large shareholder
Transaction date
Sale
Price
10.20
Quantity 10,000 -0.9%
Value US$102,000
2.9
GLAZER CAPITAL, LLC Large shareholder
Transaction date
Sale
Price
10.15
Quantity 10,000 -0.9%
Value US$101,500
2.9
GLAZER CAPITAL, LLC Large shareholder
Transaction date
Sale
Price
10.15
Quantity 10,000 -0.9%
Value US$101,500
2.9
GLAZER CAPITAL, LLC Large shareholder
Transaction date
Sale
Price
10.05
Quantity 5,000 -0.5%
Value US$50,250
2.9
GLAZER CAPITAL, LLC Large shareholder
Transaction date
Sale
Price
10.05
Quantity 5,000 -0.4%
Value US$50,250
2.9
GLAZER CAPITAL, LLC Large shareholder
Transaction date
Sale
Price
10.05
Quantity 1 -0.0%
Value US$10
2.9
GLAZER CAPITAL, LLC Large shareholder
Transaction date
Sale
Price
10.00
Quantity 1,000 -0.1%
Value US$10,000
2.9
GLAZER CAPITAL, LLC Large shareholder
Transaction date
Sale
Price
10.00
Quantity 1,000 -0.1%
Value US$10,000
2.9
GLAZER CAPITAL, LLC Large shareholder
Transaction date
Sale
Price
9.99
Quantity 20 -0.0%
Value US$200
2.9
GLAZER CAPITAL, LLC Large shareholder
Transaction date
Sale
Price
9.99
Quantity 800 -0.1%
Value US$7,992
2.9
GLAZER CAPITAL, LLC Large shareholder
Transaction date
Sale
Price
9.99
Quantity 682 -0.1%
Value US$6,813
2.9
GLAZER CAPITAL, LLC Large shareholder
Transaction date
Sale
Price
9.99
Quantity 1 -0.0%
Value US$10
2.9
GLAZER CAPITAL, LLC Large shareholder
Transaction date
Sale
Price
10.73
Quantity 11 -0.0%
Value US$118
2.9
GLAZER CAPITAL, LLC Large shareholder
Transaction date
Sale
Price
9.99
Quantity 1,699 -0.2%
Value US$16,973
2.9
GLAZER CAPITAL, LLC Large shareholder
Transaction date
Sale
Price
9.99
Quantity 1,699 -0.2%
Value US$16,973
Notification date Transaction date B/S Transaction type Insider and/or position Nb. shares
Price
Value 		Number of shares Price Value Details
2025-09-24 2025-09-22 B Purchase
2.7
WIGGANS THOMAS G
Non-Executive Director
22,358 -27.3%
56.10
US$659,059 		22,358 -27.3% 56.10 US$659,059
2025-09-24 2025-09-22 B Purchase
0.8
MARTELL RON

President and CEO

Executive Director
9,383 +48.3%
430.37
US$4,775,099 		9,383 +48.3% 430.37 US$4,775,099
2025-09-24 2025-09-22 B Purchase
1.5
Lucas Svetlana
Non-Executive Director
17,430 +1.1%
439.75
US$1,576,955 		17,430 +1.1% 439.75 US$1,576,955
2025-09-24 2025-09-22 B Purchase
0.8
Shizuru Judith Anne
Non-Executive Director
41,000 +35.4%
2.43
US$99,630 		41,000 +35.4% 2.43 US$99,630
2024-12-12 2024-12-12 PrS Proposed sale
Jeetinder Singh Mahal

Executive Officer

Officer
900
22.47
US$20,223 		900 22.47 US$20,223
2024-12-12 2024-12-12 PlS Planned sale
Mahal Jeetinder Singh

Chief Operating Officer

Officer
900 -3.5%
22.11
US$19,899 		900 -3.5% 22.11 US$19,899
2024-09-12 2024-09-12 PrS Proposed sale
Jeetinder Singh Mahal

Executive Officer

Officer
900
20.66
US$18,590 		900 20.66 US$18,590
2024-09-12 2024-09-12 PlS Planned sale
Mahal Jeetinder Singh

Chief Operating Officer

Officer
900 -3.5%
21.23
US$19,104 		900 -3.5% 21.23 US$19,104
2024-06-12 2024-06-12 PrS Proposed sale
Jeetinder Singh Mahal

Executive Officer

Officer
900
23.99
US$21,591 		900 23.99 US$21,591
2024-06-12 2024-06-12 PlS Planned sale
Mahal Jeetinder Singh

Chief Operating Officer

Officer
900 -3.5%
24.16
US$21,740 		900 -3.5% 24.16 US$21,740
2024-03-12 2024-03-12 PrS Proposed sale
Jeetinder Singh Mahal

Executive Officer

Officer
900
26.52
US$23,868 		900 26.52 US$23,868
2024-03-12 2024-03-12 PlS Planned sale
Mahal Jeetinder Singh

Chief Operating Officer

Officer
900 -3.5%
26.44
US$23,792 		900 -3.5% 26.44 US$23,792
2024-03-06 2024-03-06 PrS Proposed sale
1.5
Lis William

Director

Non-Executive Director
16,000
21.03
US$336,480 		16,000 21.03 US$336,480
2024-02-12 2024-02-08 B Purchase
3.3
Carlyle Group Inc.

Former 10% Owner
190,000 +21.7%
12.95
US$2,460,500 		190,000 +21.7% 12.95 US$2,460,500
2024-02-09 2024-02-08 B Purchase
Velan Capital Investment Management LP
Large shareholder
350,000 +41.7%
12.95
US$4,532,500 		350,000 +41.7% 12.95 US$4,532,500
2023-11-30 2023-11-28 B Purchase
2.7
WIGGANS THOMAS G
Non-Executive Director
10,000 +25.0%
0.65
US$6,486 		10,000 +25.0% 0.65 US$6,486
2023-11-22 2023-11-21 B Purchase
2.7
WIGGANS THOMAS G
Non-Executive Director
10,000 +33.3%
0.64
US$6,383 		10,000 +33.3% 0.64 US$6,383
2023-11-20 2023-11-20 B Purchase
2.7
WIGGANS THOMAS G
Non-Executive Director
10,000 +50.0%
0.63
US$6,309 		10,000 +50.0% 0.63 US$6,309
2023-11-20 2023-11-17 B Purchase
2.7
WIGGANS THOMAS G
Non-Executive Director
10,000 +100.0%
0.60
US$5,966 		10,000 +100.0% 0.60 US$5,966
2023-11-20 2023-11-16 B Purchase
2.7
WIGGANS THOMAS G
Non-Executive Director
10,000 +inf%
0.60
US$5,965 		10,000 +inf% 0.60 US$5,965
2023-10-13 2023-10-13 PrS Proposed sale
1.5
William Lis

Director

Non-Executive Director
7,965
0.85
US$6,770 		7,965 0.85 US$6,770
2023-10-13 2023-10-13 PlS Planned sale
1.5
Lis William
Non-Executive Director
7,965 -13.0%
0.85
US$6,777 		7,965 -13.0% 0.85 US$6,777
2023-06-13 2023-06-13 PrS Proposed sale
Jeetinder Singh Mahal

Executive Officer

Officer
9,000
22.68
US$204,120 		9,000 22.68 US$204,120
2023-06-13 2023-06-13 PlS Planned sale
Mahal Jeetinder Singh

See Remarks

Officer
9,000 -3.0%
1.66
US$14,915 		9,000 -3.0% 1.66 US$14,915
2023-04-14 2023-04-14 PrS Proposed sale
2.1
French Anna Louise

Director

Non-Executive Director
7,000
1.48
US$10,360 		7,000 1.48 US$10,360
2023-04-14 2023-04-14 S Sale
2.1
French Anna Louise
Non-Executive Director
7,000 -22.8%
1.48
US$10,360 		7,000 -22.8% 1.48 US$10,360
2023-04-14 2023-04-13 S Sale
2.1
EMSTER KURT VON
Non-Executive Director
9,075 -30.0%
1.49
US$13,524 		9,075 -30.0% 1.49 US$13,524
2023-04-14 2023-04-13 S Sale
1.5
Lis William
Non-Executive Director
8,500 -12.1%
1.44
US$12,240 		8,500 -12.1% 1.44 US$12,240
2023-04-13 2023-04-13 PrS Proposed sale
1.5
Lis William

Director

Non-Executive Director
8,500
1.44
US$12,240 		8,500 1.44 US$12,240
2023-04-13 2023-04-13 PrS Proposed sale
2.1
EMSTER KURT VON

Officer

Officer
9,075
1.49
US$13,524 		9,075 1.49 US$13,524
2023-04-11 2023-01-27 B Purchase
Qiming U.S. Healthcare Fund II, L.P.
Large shareholder
2,666,666 +45.6%
1.50
US$3,999,999 		2,666,666 +45.6% 1.50 US$3,999,999
2023-01-31 2023-01-27 B Purchase
3.3
Carlyle Group Inc.
Large shareholder
3,133,333 +55.7%
1.50
US$4,700,000 		3,133,333 +55.7% 1.50 US$4,700,000
2023-01-26 2023-01-25 S Sale
3.1
ROCHE HOLDING LTD
Large shareholder
75,000 -1.6%
1.89
US$141,750 		75,000 -1.6% 1.89 US$141,750
2022-06-28 2022-06-27 PlS Planned sale
1.5
Lis William
Non-Executive Director
24,743 -37.9%
2.08
US$51,404 		24,743 -37.9% 2.08 US$51,404
2022-06-28 2022-06-24 PlS Planned sale
1.5
Lis William
Non-Executive Director
24,743 -27.5%
2.02
US$50,030 		24,743 -27.5% 2.02 US$50,030
2021-04-23 2021-04-23 S Sale
2.9
GLAZER CAPITAL, LLC
Large shareholder
151,719 -14.5%
9.92
US$1,505,052 		151,719 -14.5% 9.92 US$1,505,052
2021-04-23 2021-04-21 S Sale
2.9
GLAZER CAPITAL, LLC
Large shareholder
1,164 -0.1%
9.92
US$11,547 		1,164 -0.1% 9.92 US$11,547
2021-04-21 2021-04-19 S Sale
2.9
GLAZER CAPITAL, LLC
Large shareholder
2,060 -0.2%
9.97
US$20,538 		2,060 -0.2% 9.97 US$20,538
2021-02-22 2021-02-22 S Sale
2.9
GLAZER CAPITAL, LLC
Large shareholder
698 -0.1%
10.50
US$7,329 		698 -0.1% 10.50 US$7,329
2021-02-22 2021-02-19 S Sale
2.9
GLAZER CAPITAL, LLC
Large shareholder
2,112 -0.2%
10.50
US$22,176 		2,112 -0.2% 10.50 US$22,176
2021-02-22 2021-02-18 S Sale
2.9
GLAZER CAPITAL, LLC
Large shareholder
10,000 -0.9%
10.45
US$104,500 		10,000 -0.9% 10.45 US$104,500
2021-02-09 2021-02-05 S Sale
2.9
GLAZER CAPITAL, LLC
Large shareholder
212 -0.0%
10.40
US$2,205 		212 -0.0% 10.40 US$2,205
2021-01-19 2021-01-14 S Sale
2.9
GLAZER CAPITAL, LLC
Large shareholder
101 -0.0%
10.40
US$1,050 		101 -0.0% 10.40 US$1,050
2021-01-12 2021-01-08 S Sale
2.9
GLAZER CAPITAL, LLC
Large shareholder
10,000 -0.9%
10.25
US$102,500 		10,000 -0.9% 10.25 US$102,500
2020-12-28 2020-12-28 S Sale
2.9
GLAZER CAPITAL, LLC
Large shareholder
10,000 -0.9%
10.20
US$102,000 		10,000 -0.9% 10.20 US$102,000
2020-12-28 2020-12-22 S Sale
2.9
GLAZER CAPITAL, LLC
Large shareholder
10,000 -0.9%
10.15
US$101,500 		10,000 -0.9% 10.15 US$101,500
2020-12-15 2020-12-15 S Sale
2.9
GLAZER CAPITAL, LLC
Large shareholder
10,000 -0.9%
10.15
US$101,500 		10,000 -0.9% 10.15 US$101,500
2020-12-15 2020-12-14 S Sale
2.9
GLAZER CAPITAL, LLC
Large shareholder
5,000 -0.5%
10.05
US$50,250 		5,000 -0.5% 10.05 US$50,250
2020-12-15 2020-12-11 S Sale
2.9
GLAZER CAPITAL, LLC
Large shareholder
5,000 -0.4%
10.05
US$50,250 		5,000 -0.4% 10.05 US$50,250
2020-12-09 2020-12-07 S Sale
2.9
GLAZER CAPITAL, LLC
Large shareholder
1 -0.0%
10.05
US$10 		1 -0.0% 10.05 US$10
2020-09-23 2020-09-21 S Sale
2.9
GLAZER CAPITAL, LLC
Large shareholder
1,000 -0.1%
10.00
US$10,000 		1,000 -0.1% 10.00 US$10,000
2020-09-18 2020-09-18 S Sale
2.9
GLAZER CAPITAL, LLC
Large shareholder
1,000 -0.1%
10.00
US$10,000 		1,000 -0.1% 10.00 US$10,000
2020-09-18 2020-09-16 S Sale
2.9
GLAZER CAPITAL, LLC
Large shareholder
20 -0.0%
9.99
US$200 		20 -0.0% 9.99 US$200
2020-09-15 2020-09-15 S Sale
2.9
GLAZER CAPITAL, LLC
Large shareholder
800 -0.1%
9.99
US$7,992 		800 -0.1% 9.99 US$7,992
2020-09-15 2020-09-11 S Sale
2.9
GLAZER CAPITAL, LLC
Large shareholder
682 -0.1%
9.99
US$6,813 		682 -0.1% 9.99 US$6,813
2020-09-10 2020-09-08 S Sale
2.9
GLAZER CAPITAL, LLC
Large shareholder
1 -0.0%
9.99
US$10 		1 -0.0% 9.99 US$10
2020-12-09 2020-09-04 S Sale
2.9
GLAZER CAPITAL, LLC
Large shareholder
11 -0.0%
10.73
US$118 		11 -0.0% 10.73 US$118
2020-08-17 2020-08-17 S Sale
2.9
GLAZER CAPITAL, LLC
Large shareholder
1,699 -0.2%
9.99
US$16,973 		1,699 -0.2% 9.99 US$16,973
2020-08-17 2020-08-13 S Sale
2.9
GLAZER CAPITAL, LLC
Large shareholder
1,699 -0.2%
9.99
US$16,973 		1,699 -0.2% 9.99 US$16,973
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