Jasper Therapeutics, Inc. - Class A JSPR

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Jasper Therapeutics, Inc. - Class A Common Stock · Company · Nasdaq · Healthcare / Biotechnology

Paper trade (simulated — no real money)

Fill: USD 0.5100 · FX 1 USD = 1.277900 SGD · about SGD 0.6517 per unit

Sign in to practise with simulated trades before investing real money. USD fills are converted into the SGD portfolio at the displayed rate.

Announcement types: (default: consequential filings)
Results & current reports
Capital markets
Ownership & governance

USD closing-price chart (daily close from yfinance · Last year)

USD 2.33 → 0.51 · -78.1%
2.3601.3510.341 1,2 3 4 5 6,7 8 9,10 11 12 13 14,15 16 17 18 19 20,21 22 23 24 25 26 27,28 29,30 31 32 33 34 Oct 25Jan 26Apr 26Jul 26Oct 26

Numbered dotted lines mark the filtered filings under Announcement Events below.

Price & SEC Filing History 25 Oct 2025 — 26 Oct 2026 (Last year)

Daily Nasdaq prices are sourced from yfinance. Yellow highlighting marks an intraday rise or a gap up between adjacent trading sessions. SEC acceptance times are converted to US Eastern time: pre-market filings appear below that day’s OHLCV row; filings accepted after the 09:30 ET open appear above it. The SEC does not publish an exact first-public-availability timestamp, so acceptance time is the best available proxy.

No data yet
Weekend
Weekend
0.4902 0.5398 0.4839 0.5100 323,543
0.5000 0.5150 0.4900 0.4960 72,300
0.5200 0.5400 0.4970 0.5040 358,800
0.4780 0.5290 0.4770 0.5000 366,500
34 · DEF 14A After market open · 13:33 ET PROXY STATEMENT ↗
0.4700 0.4900 0.4600 0.4770 391,500
Weekend
Weekend
0.5460 0.5500 0.4780 0.4800 245,600
33 · 8-K After market open · 12:00 ET CURRENT REPORT ↗
0.4900 0.5450 0.4760 0.5320 380,000
32 · S-3 After-hours · 21:22 ET REGISTRATION STATEMENT ↗
0.5010 0.5170 0.4600 0.5010 620,100
0.5400 0.5400 0.4960 0.4960 429,300
0.5690 0.5770 0.5450 0.5550 335,800
Weekend
Weekend
31 · PRE 14A After-hours · 20:53 ET PROXY STATEMENT ↗
0.5470 0.5770 0.5410 0.5700 261,900
0.5630 0.5800 0.5400 0.5600 362,200
30 · 8-K After market open · 12:05 ET CURRENT REPORT ↗ 29 · SC TO-I After market open · 11:50 ET FORM SC TO-I ↗
0.5430 0.5900 0.5400 0.5700 365,200
0.6000 0.6000 0.5500 0.5600 327,900
28 · 8-K After market open · 12:00 ET CURRENT REPORT ↗
0.5700 0.5960 0.5420 0.5930 376,000
27 · 8-K/A Next filing day · accepted 02 Oct, 22:54 ET AMENDMENT NO. 2 TO FORM 8-K ↗
Weekend
Weekend
0.6000 0.6150 0.5630 0.5650 236,100
26 · 8-K/A After-hours · 21:29 ET AMENDMENT NO. 1 TO FORM 8-K ↗
0.5900 0.6400 0.5850 0.5980 294,600
0.6200 0.6550 0.5720 0.5800 538,500
0.6420 0.6750 0.5840 0.6250 915,700
25 · 8-K After-hours · 20:44 ET CURRENT REPORT ↗
0.6060 0.6560 0.6000 0.6260 251,100
Weekend
Weekend
0.5930 0.6200 0.5790 0.6090 163,100
0.5920 0.5920 0.5440 0.5850 634,200
0.6280 0.6480 0.5670 0.5670 427,000
0.6290 0.6510 0.6060 0.6230 310,100
0.6360 0.6700 0.6000 0.6030 206,000
Weekend
Weekend
0.6300 0.6500 0.6000 0.6180 222,800
0.5900 0.6600 0.5900 0.6340 303,600
0.5770 0.6090 0.5600 0.5810 505,300
0.6400 0.6440 0.5680 0.5700 402,600
0.6600 0.6680 0.6000 0.6330 404,300
Weekend
Weekend
0.6930 0.7110 0.6600 0.6600 294,300
0.6900 0.7300 0.6900 0.7010 207,900
0.7010 0.7140 0.6800 0.7010 60,300
0.7390 0.7400 0.6950 0.7090 189,900
No trading
Weekend
Weekend
24 · DEF 14A After market open · 15:08 ET PROXY STATEMENT ↗
0.6700 0.7100 0.6640 0.7090 432,800
0.6930 0.7100 0.6530 0.6860 364,000
0.6880 0.7200 0.6800 0.7050 380,300
0.7000 0.7110 0.6350 0.6980 854,200
0.7150 0.7400 0.6550 0.7110 388,000
Weekend
Weekend
0.7100 0.7100 0.6600 0.7000 267,400
0.7070 0.7440 0.6900 0.6990 254,200
23 · 8-K After-hours · 16:15 ET CURRENT REPORT ↗
0.7140 0.7210 0.6920 0.7180 246,100
0.7090 0.7400 0.6990 0.7200 271,500
22 · PRE 14A After-hours · 17:30 ET PROXY STATEMENT ↗
0.7300 0.7350 0.6740 0.7220 354,100
Weekend
Weekend
0.6800 0.7360 0.6750 0.7160 780,800
0.7350 0.7600 0.6780 0.6910 2,336,100
0.7440 0.8100 0.7200 0.7470 294,300
0.8200 0.9100 0.6600 0.7500 1,997,300
0.7700 0.9160 0.7460 0.8420 798,800
Weekend
Weekend
21 · 8-K After-hours · 16:07 ET CURRENT REPORT ↗ 20 · 10-Q After market open · 11:00 ET QUARTERLY REPORT ↗
0.8710 0.8710 0.7770 0.7900 569,500
0.8110 0.9430 0.8060 0.8630 992,300
0.9110 0.9230 0.8010 0.8240 653,400
0.8180 0.9700 0.8000 0.8930 1,433,700
0.7500 0.8200 0.7160 0.7990 613,200
Weekend
Weekend
0.6520 0.7500 0.6500 0.7100 760,600
0.6400 0.7200 0.6300 0.6460 650,900
0.6660 0.6680 0.6100 0.6600 336,000
0.6100 0.6890 0.5900 0.6660 718,800
19 · 8-K After-hours · 16:47 ET CURRENT REPORT ↗
0.6300 0.6400 0.5930 0.6060 322,100
Weekend
Weekend
0.6300 0.6350 0.5500 0.6300 523,800
18 · 8-K Pre-market · 06:06 ET CURRENT REPORT ↗
0.6000 0.6410 0.5810 0.6210 499,000
0.6300 0.6700 0.6000 0.6000 198,800
0.6700 0.6700 0.6000 0.6330 531,000
0.6900 0.7050 0.6300 0.6940 507,000
Weekend
Weekend
0.7050 0.7400 0.6810 0.6880 674,200
0.7350 0.7700 0.7090 0.7290 527,200
0.7600 0.8100 0.7000 0.7450 1,086,200
0.7720 0.8850 0.7600 0.7700 1,720,700
0.8700 0.8700 0.7500 0.8140 2,657,900
Weekend
Weekend
0.7200 1.0300 0.5810 0.8850 29,907,300
17 · 8-K Next filing day · accepted 16 Jul, 21:50 ET CURRENT REPORT ↗ 16 · 8-K After-hours · 17:15 ET CURRENT REPORT ↗
0.6760 0.8100 0.6600 0.7740 16,994,900
0.7220 0.7340 0.6200 0.6920 620,400
0.6170 0.7600 0.5930 0.7230 3,127,000
0.6000 0.6800 0.5800 0.6080 1,348,400
Weekend
Weekend
0.5900 0.6800 0.5410 0.5800 1,462,900
0.5300 0.5960 0.5050 0.5810 471,400
0.4820 0.5680 0.4350 0.5150 747,900
0.4600 0.4880 0.4450 0.4820 196,700
0.4490 0.4750 0.4230 0.4660 348,500
Weekend
Weekend
No trading
0.4600 0.4800 0.4240 0.4280 217,400
0.4290 0.4700 0.4100 0.4550 341,900
0.3980 0.4390 0.3650 0.4210 266,400
0.3490 0.4200 0.3150 0.4200 974,800
Weekend
Weekend
0.4400 0.4540 0.3400 0.3410 1,353,000
0.4910 0.5190 0.4400 0.4430 316,200
0.5040 0.5210 0.4800 0.4910 279,300
0.5000 0.5050 0.4570 0.4890 650,200
0.4530 0.6000 0.4530 0.5020 1,678,700
Weekend
Weekend
No trading
0.4660 0.4770 0.4410 0.4530 286,600
0.4610 0.4910 0.4410 0.4710 202,500
0.4700 0.4740 0.4310 0.4520 265,300
15 · DEFA14A After-hours · 16:03 ET DEFINITIVE ADDITIONAL MATERIALS ↗ 14 · DEF 14A After-hours · 16:03 ET PROXY STATEMENT ↗
0.4530 0.5210 0.4530 0.4810 509,200
Weekend
Weekend
0.4600 0.4800 0.4500 0.4580 237,100
0.4600 0.4900 0.4550 0.4660 196,800
0.4460 0.4920 0.4460 0.4640 320,800
13 · 8-K After-hours · 16:05 ET CURRENT REPORT ↗
0.4680 0.5000 0.4200 0.4660 407,300
0.4970 0.5050 0.4550 0.4680 570,400
Weekend
Weekend
0.4810 0.5000 0.4700 0.4930 558,800
0.5230 0.5920 0.4600 0.4810 865,000
0.5530 0.6400 0.4900 0.5320 1,639,800
0.5940 0.6100 0.4300 0.5510 2,850,900
0.8200 0.8580 0.5340 0.5340 2,486,900
12 · 8-K Pre-market · 08:01 ET CURRENT REPORT ↗
Weekend
Weekend
0.9090 0.9140 0.8200 0.8290 337,900
0.8840 0.9240 0.8800 0.8900 230,600
0.9270 0.9560 0.8900 0.9020 232,300
0.9100 0.9410 0.8800 0.9130 114,600
No trading
Weekend
Weekend
0.8800 1.0200 0.8700 0.9030 680,200
11 · 8-K After-hours · 16:01 ET CURRENT REPORT ↗
0.8600 0.9000 0.8330 0.8730 99,400
0.8200 0.8780 0.8200 0.8720 77,900
0.8000 0.8300 0.7650 0.8180 158,800
0.8650 0.8650 0.7800 0.8070 213,100
Weekend
Weekend
0.9160 0.9300 0.8050 0.8500 661,800
10 · 8-K After-hours · 16:05 ET CURRENT REPORT ↗ 9 · 10-Q After-hours · 16:05 ET QUARTERLY REPORT ↗
0.9220 0.9590 0.8730 0.9590 180,500
0.9500 0.9500 0.8800 0.9200 264,400
0.9410 0.9410 0.8820 0.9130 205,800
0.9270 0.9470 0.8800 0.9420 213,500
Weekend
Weekend
0.9000 0.9620 0.8910 0.9260 113,900
0.9520 0.9750 0.9000 0.9080 154,700
0.9800 1.0000 0.9410 0.9470 274,700
1.0100 1.0300 0.9370 0.9660 193,800
0.9650 0.9970 0.9200 0.9860 229,300
Weekend
Weekend
0.9400 0.9630 0.9200 0.9300 222,700
8 · 10-K/A After-hours · 16:01 ET AMENDMENT NO. 1 TO FORM 10-K ↗
0.9100 0.9470 0.9010 0.9360 112,700
0.9500 0.9500 0.8590 0.8900 130,000
0.9000 0.9880 0.9000 0.9300 181,200
0.8600 0.9580 0.8490 0.9300 354,100
Weekend
Weekend
0.9000 0.9080 0.8130 0.8380 625,300
1.0000 1.0000 0.9000 0.9050 212,100
0.9820 1.0000 0.9300 0.9790 327,900
1.0600 1.0600 0.9600 0.9600 371,500
1.0300 1.1200 0.9610 1.0600 640,700
Weekend
Weekend
1.0000 1.0500 0.9610 1.0200 457,200
1.1100 1.1100 0.9500 0.9660 541,400
0.9450 1.0500 0.8910 1.0500 499,600
0.9400 0.9600 0.8500 0.9320 548,000
0.7900 0.9300 0.7840 0.9190 627,000
Weekend
Weekend
0.8500 0.8680 0.7470 0.8020 800,700
0.7190 0.8480 0.7060 0.8240 1,332,300
0.7000 0.7160 0.6600 0.7070 698,900
0.6800 0.6840 0.6230 0.6680 1,036,400
0.7200 0.7200 0.6510 0.6840 1,282,600
Weekend
Weekend
No trading
0.7930 0.8110 0.6860 0.6880 891,100
0.8870 0.9180 0.8000 0.8000 671,500
0.8550 0.9490 0.8060 0.8760 664,600
7 · 8-K After-hours · 17:33 ET CURRENT REPORT ↗ 6 · 10-K After-hours · 17:32 ET ANNUAL REPORT ↗
1.0900 1.0900 0.8780 0.9000 837,200
Weekend
Weekend
1.1200 1.1200 1.0400 1.0500 526,900
1.1100 1.1450 1.0700 1.1100 401,300
1.1700 1.1950 1.0900 1.0900 315,300
1.1900 1.2000 1.1400 1.1500 222,800
1.2300 1.2350 1.1700 1.1900 256,600
Weekend
Weekend
1.2200 1.2700 1.2100 1.2300 216,300
1.2200 1.2450 1.1800 1.2200 191,600
1.2600 1.2600 1.2000 1.2200 257,900
1.2200 1.2700 1.2200 1.2500 173,100
1.2100 1.2400 1.1700 1.2400 255,400
Weekend
Weekend
1.3000 1.3300 1.2000 1.2200 385,300
1.3100 1.3350 1.2600 1.2700 234,500
1.3800 1.3950 1.3100 1.3400 169,000
1.3200 1.4100 1.3100 1.3700 447,800
1.3800 1.3900 1.3000 1.3100 378,400
Weekend
Weekend
1.3600 1.4400 1.3500 1.3800 1,174,100
1.4300 1.4300 1.3300 1.3700 756,900
1.3600 1.4500 1.3200 1.4200 314,600
1.3200 1.3600 1.2950 1.3300 213,000
1.3400 1.3800 1.3200 1.3500 110,800
Weekend
Weekend
1.3500 1.4000 1.3100 1.3800 177,900
1.4100 1.4100 1.3550 1.3700 119,600
1.4000 1.4200 1.3500 1.4000 130,600
1.3600 1.4000 1.3300 1.3800 196,000
1.3400 1.4000 1.3200 1.3700 285,700
Weekend
Weekend
1.3900 1.4390 1.2700 1.3200 208,600
1.3500 1.4100 1.3100 1.4000 130,400
1.2700 1.3950 1.2000 1.3400 759,800
1.1600 1.2800 1.1100 1.2100 562,500
No trading
Weekend
Weekend
1.1900 1.2500 1.1400 1.1400 529,800
1.2500 1.2750 1.1550 1.1700 877,900
1.3250 1.3350 1.2400 1.2400 825,600
1.3500 1.3800 1.2900 1.3100 745,900
1.3400 1.3700 1.2900 1.3600 277,100
Weekend
Weekend
1.3000 1.4100 1.2830 1.3500 526,800
1.3600 1.3700 1.2600 1.2700 787,100
1.4400 1.4400 1.3300 1.3800 608,100
1.4700 1.4900 1.4100 1.4400 265,000
1.4700 1.5300 1.4700 1.4700 263,200
Weekend
Weekend
1.5400 1.5600 1.4600 1.4800 358,800
1.5700 1.5800 1.5110 1.5500 523,000
1.6500 1.6550 1.5500 1.5900 800,000
1.5300 1.6500 1.5150 1.6400 817,000
1.5600 1.5800 1.5100 1.5300 258,300
Weekend
Weekend
1.5900 1.6100 1.5300 1.5700 345,500
1.5200 1.6250 1.5200 1.5700 556,000
1.5700 1.5800 1.4900 1.5200 472,000
1.5100 1.6050 1.4700 1.5400 621,200
No trading
Weekend
Weekend
1.5100 1.5700 1.4800 1.5300 302,100
1.6100 1.6100 1.4800 1.5200 837,700
1.5700 1.6750 1.5100 1.6200 822,700
1.5300 1.6000 1.4700 1.5600 783,000
1.5400 1.5600 1.4100 1.4800 1,950,300
Weekend
Weekend
1.6700 1.7200 1.4900 1.5100 2,580,800
1.8700 1.9350 1.5010 1.6600 5,817,700
5 · 8-K Pre-market · 07:06 ET CURRENT REPORT ↗ 4 · 8-K After-hours · 16:35 ET CURRENT REPORT ↗
1.9000 2.0700 1.8900 2.0500 900,400
1.8300 1.9200 1.8300 1.9000 315,300
1.8400 1.9200 1.8150 1.8300 332,400
Weekend
Weekend
1.8200 1.8650 1.7850 1.8400 383,800
No trading
1.7800 1.8400 1.7600 1.8300 452,500
1.7800 1.8500 1.7550 1.7900 446,000
1.7300 1.8300 1.7300 1.7600 476,000
Weekend
Weekend
1.8300 1.8400 1.7310 1.7600 443,800
No trading
1.8000 1.8500 1.7800 1.8300 209,700
1.8600 1.8900 1.8100 1.8100 1,601,300
1.8800 1.9300 1.8600 1.9100 583,000
Weekend
Weekend
1.8400 1.9600 1.8050 1.8600 1,395,000
1.7300 1.9200 1.7110 1.8600 1,222,800
1.7000 1.7700 1.6600 1.7200 507,700
1.6400 1.7150 1.6200 1.7100 466,800
1.7600 1.7800 1.6050 1.6400 872,800
Weekend
Weekend
1.8300 1.8900 1.7700 1.7700 574,800
1.8600 1.8900 1.8100 1.8400 549,700
1.7700 1.8800 1.7400 1.8700 830,400
1.7000 1.7900 1.6700 1.7700 652,500
1.7200 1.7450 1.6000 1.7200 915,500
Weekend
Weekend
1.8500 1.9300 1.6910 1.7100 1,132,600
1.6000 1.8900 1.5900 1.8600 1,970,300
1.4800 1.6600 1.3900 1.6500 3,809,500
2.1400 2.4200 1.5500 1.5800 59,461,900
3 · 8-K Pre-market · 07:06 ET CURRENT REPORT ↗
1.8200 1.8200 1.7000 1.7200 2,200,600
Weekend
Weekend
1.7500 1.8800 1.7450 1.8400 193,100
No trading
1.7500 1.7750 1.6800 1.7450 197,100
1.7500 1.8000 1.7100 1.7500 592,500
1.7200 1.8250 1.6950 1.7200 617,000
Weekend
Weekend
1.7000 1.7940 1.6800 1.7000 300,200
1.8500 1.9700 1.7600 1.7600 319,700
1.8300 1.8500 1.7600 1.8500 283,900
1.7100 1.9200 1.7100 1.8300 363,700
1.7000 1.8300 1.6300 1.7900 525,400
Weekend
Weekend
1.5900 1.6800 1.5750 1.6800 341,300
1.7700 1.7700 1.5600 1.6100 480,100
1.7200 1.8250 1.6400 1.7700 648,300
1.7800 1.8000 1.6800 1.7000 351,400
1.9300 1.9780 1.7200 1.7800 662,600
2 · 10-Q Pre-market · 08:17 ET QUARTERLY REPORT ↗ 1 · 8-K Pre-market · 08:05 ET CURRENT REPORT ↗
Weekend
Weekend
1.8200 1.8250 1.6000 1.7800 543,000
2.0000 2.0000 1.8100 1.8300 262,600
1.9400 1.9700 1.8300 1.9500 450,800
2.0500 2.0560 1.8000 1.8100 495,000
2.2600 2.2640 2.0500 2.1000 324,200
Weekend
Weekend
2.2200 2.3300 2.2000 2.2800 241,700
2.3900 2.4800 2.1600 2.1800 532,200
2.3400 2.5200 2.2900 2.3600 454,200
2.3300 2.3900 2.2900 2.3400 278,900
2.3700 2.4100 2.3000 2.3300 313,700
Weekend
Weekend

Announcement Events

Each title opens the filing on the SEC website. Registered users can summarise the filing and up to seven relevant exhibits linked within the same SEC submission.

34 DEF 14A PROXY STATEMENT (opens SEC filing in a new tab) After market open · 13:33 ET Summarise
33 8-K CURRENT REPORT (opens SEC filing in a new tab) After market open · 12:00 ET Summarise
32 S-3 REGISTRATION STATEMENT (opens SEC filing in a new tab) After-hours · 21:22 ET Summarise
31 PRE 14A PROXY STATEMENT (opens SEC filing in a new tab) After-hours · 20:53 ET Summarise
30 8-K CURRENT REPORT (opens SEC filing in a new tab) After market open · 12:05 ET Summarise
29 SC TO-I FORM SC TO-I (opens SEC filing in a new tab) After market open · 11:50 ET Summarise
28 8-K CURRENT REPORT (opens SEC filing in a new tab) After market open · 12:00 ET Summarise
27 8-K/A AMENDMENT NO. 2 TO FORM 8-K (opens SEC filing in a new tab) Next filing day · accepted 02 Oct, 22:54 ET Summarise
26 8-K/A AMENDMENT NO. 1 TO FORM 8-K (opens SEC filing in a new tab) After-hours · 21:29 ET Summarise
25 8-K CURRENT REPORT (opens SEC filing in a new tab) After-hours · 20:44 ET Summarise
24 DEF 14A PROXY STATEMENT (opens SEC filing in a new tab) After market open · 15:08 ET Summarise
23 8-K CURRENT REPORT (opens SEC filing in a new tab) After-hours · 16:15 ET Summarise
22 PRE 14A PROXY STATEMENT (opens SEC filing in a new tab) After-hours · 17:30 ET Summarise
21 8-K CURRENT REPORT (opens SEC filing in a new tab) After-hours · 16:07 ET Summarise
20 10-Q QUARTERLY REPORT (opens SEC filing in a new tab) After market open · 11:00 ET Summarise
19 8-K CURRENT REPORT (opens SEC filing in a new tab) After-hours · 16:47 ET Summarise
18 8-K CURRENT REPORT (opens SEC filing in a new tab) Pre-market · 06:06 ET Summarise
17 8-K CURRENT REPORT (opens SEC filing in a new tab) Next filing day · accepted 16 Jul, 21:50 ET Summarise
16 8-K CURRENT REPORT (opens SEC filing in a new tab) After-hours · 17:15 ET Summarise
15 DEFA14A DEFINITIVE ADDITIONAL MATERIALS (opens SEC filing in a new tab) After-hours · 16:03 ET Summarise
14 DEF 14A PROXY STATEMENT (opens SEC filing in a new tab) After-hours · 16:03 ET Summarise
13 8-K CURRENT REPORT (opens SEC filing in a new tab) After-hours · 16:05 ET Summarise
12 8-K CURRENT REPORT (opens SEC filing in a new tab) Pre-market · 08:01 ET Summarise
11 8-K CURRENT REPORT (opens SEC filing in a new tab) After-hours · 16:01 ET Summarise
10 8-K CURRENT REPORT (opens SEC filing in a new tab) After-hours · 16:05 ET Summarise
9 10-Q QUARTERLY REPORT (opens SEC filing in a new tab) After-hours · 16:05 ET Summarise
8 10-K/A AMENDMENT NO. 1 TO FORM 10-K (opens SEC filing in a new tab) After-hours · 16:01 ET Summarise
7 8-K CURRENT REPORT (opens SEC filing in a new tab) After-hours · 17:33 ET Summarise
6 10-K ANNUAL REPORT (opens SEC filing in a new tab) After-hours · 17:32 ET Summarise
5 8-K CURRENT REPORT (opens SEC filing in a new tab) Pre-market · 07:06 ET Summarise
4 8-K CURRENT REPORT (opens SEC filing in a new tab) After-hours · 16:35 ET Summarise
3 8-K CURRENT REPORT (opens SEC filing in a new tab) Pre-market · 07:06 ET Summarise
2 10-Q QUARTERLY REPORT (opens SEC filing in a new tab) Pre-market · 08:17 ET Summarise
1 8-K CURRENT REPORT (opens SEC filing in a new tab) Pre-market · 08:05 ET Summarise