PRTA
Prothena Corp (PRTA)
NASDAQ
$8.38-$0.16 (-1.87%)
Price as of Oct 02, 2026 5:10 PM EDT
  • $438.4M
    Market Cap
  • -14.51%
    1-Year Change
  • Biotechnology
    Industry
  • 1 Month
    -11.13%
    Low Price$8.24
    High Price$9.82
  • 3 Months
    -10.86%
    Low Price$8.12
    High Price$9.85
  • 1 Year
    -14.51%
    Low Price$7.91
    High Price$11.51
Date
Open
High
Low
Close
Change (%)
Volume
10/01/2026
8.54
8.58
8.35
8.54
+1.91%
457,092
09/30/2026
8.98
8.99
8.37
8.38
-4.56%
634,780
09/29/2026
8.66
8.80
8.59
8.78
+0.69%
602,979
09/28/2026
8.25
8.86
8.07
8.72
+5.19%
488,857
09/25/2026
8.38
8.52
8.19
8.29
-0.36%
481,048
09/24/2026
8.63
8.73
8.28
8.32
-4.15%
426,063
09/23/2026
8.94
8.97
8.67
8.68
-3.45%
357,843
09/22/2026
8.72
9.09
8.70
8.99
+5.64%
442,526
09/21/2026
8.59
8.80
8.46
8.51
-0.82%
363,158
09/18/2026
8.41
8.60
8.25
8.58
+1.42%
1,828,402
09/17/2026
8.39
8.56
8.23
8.46
+2.67%
404,760
09/16/2026
8.35
8.50
8.20
8.24
-1.08%
398,337
09/15/2026
8.86
8.86
8.30
8.33
-5.98%
323,438
09/14/2026
8.95
8.99
8.79
8.86
-0.78%
374,872
09/11/2026
9.06
9.14
8.77
8.93
-1.00%
376,275
09/10/2026
9.25
9.26
8.97
9.02
-3.01%
310,912
09/09/2026
9.40
9.50
9.22
9.30
-2.52%
294,558
09/08/2026
9.60
9.67
9.35
9.54
-2.85%
305,440
09/04/2026
9.50
9.87
9.48
9.82
+2.29%
383,928
09/03/2026
9.77
9.78
9.51
9.60
-0.88%
277,055
09/02/2026
9.64
9.75
9.37
9.69
+0.78%
341,055
09/01/2026
9.28
9.63
9.26
9.61
+2.78%
267,669
08/31/2026
9.26
9.40
9.10
9.35
+0.21%
333,768
08/28/2026
9.02
9.48
8.95
9.33
+2.64%
498,115
08/27/2026
9.16
9.24
8.95
9.09
-1.73%
338,921
08/26/2026
9.40
9.40
9.15
9.25
-1.80%
289,040
08/25/2026
9.51
9.82
9.42
9.42
+0.32%
363,713
08/24/2026
9.46
9.49
9.19
9.39
-0.63%
248,124
08/21/2026
9.11
9.52
9.09
9.45
+4.65%
376,044
08/20/2026
9.13
9.15
8.71
9.03
-2.80%
345,968
08/19/2026
8.91
9.34
8.91
9.29
+6.66%
384,699
08/18/2026
8.88
9.00
8.58
8.71
-1.91%
248,560
08/17/2026
8.84
9.08
8.73
8.88
+0.23%
365,922
08/14/2026
9.04
9.15
8.84
8.86
-2.42%
312,600
08/13/2026
9.30
9.37
9.04
9.08
-1.94%
343,057
08/12/2026
9.22
9.31
9.09
9.26
+0.43%
274,927
08/11/2026
9.12
9.29
8.86
9.22
+1.10%
475,252
08/10/2026
8.76
9.17
8.53
9.12
+4.11%
713,687
08/07/2026
8.54
8.85
8.04
8.76
+2.10%
481,884
08/06/2026
8.50
8.77
8.33
8.58
+1.06%
418,686
08/06/2026
-$0.36 Earnings
08/05/2026
8.49
8.74
8.41
8.49
0.00%
489,491
08/04/2026
8.33
8.58
8.33
8.49
+1.92%
329,913
08/03/2026
8.17
8.38
8.04
8.33
+2.59%
566,000
07/31/2026
8.41
8.51
8.00
8.12
-3.45%
545,490
07/30/2026
8.50
8.56
8.26
8.41
-1.75%
502,233
07/29/2026
8.45
8.68
8.39
8.56
0.00%
641,214
07/28/2026
8.70
8.78
8.36
8.56
-1.61%
802,255
07/27/2026
8.88
9.13
8.66
8.70
-0.57%
704,707
07/24/2026
8.54
8.83
8.35
8.75
+2.58%
576,837
07/23/2026
8.27
8.63
8.23
8.53
+1.07%
532,213
07/22/2026
8.69
8.79
8.43
8.44
-3.54%
542,549
07/21/2026
8.72
8.81
8.51
8.75
+0.92%
647,644
07/20/2026
8.66
8.85
8.55
8.67
+0.12%
549,625
07/17/2026
8.40
8.80
8.28
8.66
+2.24%
408,386
07/16/2026
8.40
8.66
8.08
8.47
+0.47%
659,662
07/15/2026
8.58
8.63
8.42
8.43
-2.43%
504,131
07/14/2026
8.77
8.88
8.61
8.64
-2.15%
522,031
07/13/2026
9.17
9.19
8.76
8.83
-4.44%
781,732
07/10/2026
9.64
9.82
9.03
9.24
-4.15%
505,130
07/09/2026
9.83
10.02
9.55
9.64
-2.13%
482,229
07/08/2026
9.66
9.86
9.56
9.85
+1.76%
444,245
07/07/2026
9.62
9.78
9.33
9.68
+1.89%
520,542
07/06/2026
9.65
9.84
9.47
9.50
-1.96%
403,737
07/02/2026
9.61
10.15
9.57
9.69
+1.15%
462,875
07/01/2026
9.74
10.00
9.47
9.58
-2.15%
435,333
06/30/2026
9.96
10.04
9.75
9.79
-1.81%
339,636
06/29/2026
10.00
10.12
9.78
9.97
-0.50%
420,255
06/26/2026
9.32
10.09
9.28
10.02
+8.09%
1,914,376
06/25/2026
9.42
9.58
9.19
9.27
-1.38%
964,889
06/24/2026
9.57
9.87
9.26
9.40
-1.57%
477,885
06/23/2026
9.12
9.77
9.12
9.55
+4.37%
458,044
06/22/2026
8.90
9.27
8.89
9.15
+2.46%
612,544
06/18/2026
8.63
9.15
8.52
8.93
+5.18%
1,390,843
06/17/2026
8.39
8.72
8.39
8.49
+2.41%
542,968
06/16/2026
8.16
8.35
7.85
8.29
+1.72%
586,273
06/15/2026
8.69
8.77
7.93
8.15
-1.21%
622,611
06/12/2026
8.26
8.45
8.23
8.25
-0.12%
315,405
06/11/2026
7.89
8.46
7.73
8.26
+4.42%
634,229
06/10/2026
8.42
8.59
7.89
7.91
-6.61%
456,444
06/09/2026
8.56
8.87
8.35
8.47
-1.05%
493,476
06/08/2026
8.80
8.89
8.53
8.56
-2.62%
313,207
06/05/2026
9.25
9.38
8.63
8.79
-4.97%
656,306
06/04/2026
9.03
9.45
9.03
9.25
+3.70%
504,872
06/03/2026
9.21
9.21
8.73
8.92
-2.94%
592,902
06/02/2026
9.59
9.59
9.12
9.19
-4.17%
439,010
06/01/2026
10.03
10.07
9.50
9.59
-5.80%
457,805
05/29/2026
9.93
10.24
9.80
10.18
+2.00%
501,434
05/28/2026
9.95
10.05
9.93
9.98
-0.50%
281,818
05/27/2026
10.11
10.26
10.01
10.03
-0.30%
616,187
05/26/2026
9.84
10.07
9.45
10.06
+2.34%
918,666
05/22/2026
9.36
10.00
9.36
9.83
+4.46%
510,853
05/21/2026
9.16
9.42
9.04
9.41
+0.64%
388,741
05/20/2026
9.09
9.41
9.09
9.35
+3.09%
624,875
05/19/2026
9.61
9.84
9.02
9.07
-5.42%
627,307
05/18/2026
9.66
10.09
9.53
9.59
-1.74%
650,972
05/15/2026
9.73
9.86
9.46
9.76
-1.01%
700,063
05/14/2026
9.60
9.88
9.42
9.86
+2.71%
452,435
05/13/2026
9.33
9.73
9.28
9.60
+1.80%
530,782
05/12/2026
9.67
9.82
9.29
9.43
-2.48%
495,103