PRTA
Prothena Corp (PRTA)
NASDAQ
$8.50-$0.06 (-0.72%)
Price as of Nov 11, 2026 7:55 PM EST
  • $439.6M
    Market Cap
  • -18.32%
    1-Year Change
  • Biotechnology
    Industry
  • 1 Month
    -3.17%
    Low Price$7.89
    High Price$9.10
  • 3 Months
    -6.14%
    Low Price$7.89
    High Price$9.82
  • 1 Year
    -18.32%
    Low Price$7.89
    High Price$11.51
Date
Open
High
Low
Close
Change (%)
Volume
11/10/2026
8.63
8.76
8.31
8.56
-2.45%
394,176
11/09/2026
8.05
8.85
7.79
8.78
+10.10%
741,119
11/06/2026
7.87
8.17
7.87
7.97
+1.01%
421,782
11/05/2026
8.38
8.38
7.87
7.89
-5.96%
519,617
11/05/2026
-$0.32 Earnings
11/04/2026
8.48
8.56
8.30
8.39
+2.19%
289,720
11/03/2026
8.30
8.49
8.15
8.21
-0.97%
289,876
11/02/2026
8.45
8.49
8.11
8.29
-2.13%
464,594
10/30/2026
8.79
8.90
8.35
8.47
-4.62%
452,298
10/29/2026
9.10
9.26
8.75
8.88
-2.42%
370,069
10/28/2026
8.64
9.22
8.61
9.10
+3.29%
751,998
10/27/2026
8.40
8.85
8.35
8.81
+4.88%
654,353
10/26/2026
8.34
8.49
8.21
8.40
+2.44%
594,545
10/23/2026
8.18
8.27
7.93
8.20
-0.61%
386,145
10/22/2026
8.01
8.29
7.96
8.25
+2.74%
381,831
10/21/2026
8.47
8.54
8.01
8.03
-5.53%
461,394
10/20/2026
8.55
8.65
8.45
8.50
+0.24%
528,978
10/19/2026
8.39
8.57
8.31
8.48
+1.56%
361,132
10/16/2026
8.58
8.62
8.24
8.35
-1.76%
670,257
10/15/2026
8.54
8.65
8.44
8.50
+1.55%
358,380
10/14/2026
8.28
8.56
8.19
8.37
+0.12%
620,027
10/13/2026
8.45
8.55
8.20
8.36
-0.83%
573,312
10/12/2026
8.81
8.81
8.40
8.43
-4.64%
489,760
10/09/2026
8.57
9.31
8.50
8.84
+2.67%
931,625
10/08/2026
8.43
8.81
8.36
8.61
+1.53%
642,408
10/07/2026
7.93
8.63
7.88
8.48
+5.74%
690,412
10/06/2026
8.28
8.28
7.80
8.02
-3.02%
510,608
10/05/2026
8.34
8.37
7.91
8.27
-1.08%
714,462
10/02/2026
8.62
8.62
8.35
8.36
-2.11%
675,839
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