Prothena Corporation plc (PRTA)

Last Closing Price: 9.86 (2026-03-04)

Profile
Ticker
PRTA
Security Name
Prothena Corporation plc
Exchange
NASDAQ
Sector
Healthcare
Industry
Biotechnology
Free Float
48,450,000
Market Capitalization
503,880,000
Average Volume (Last 20 Days)
427,606
Beta (Past 60 Months)
-0.24
Percentage Held By Insiders (Latest Annual Proxy Report)
10.00
Percentage Held By Institutions (Latest 13F Reports)
97.08
Recent Price/Volume
Closing Price
9.86
Opening Price
9.36
High Price
9.96
Low Price
9.36
Volume
522,000
Previous Closing Price
9.36
Previous Opening Price
9.09
Previous High Price
9.62
Previous Low Price
8.95
Previous Volume
553,000
High/Low Price
52-Week High Price
15.63
26-Week High Price
11.69
13-Week High Price
11.57
4-Week High Price
9.96
2-Week High Price
9.96
1-Week High Price
9.96
52-Week Low Price
4.32
26-Week Low Price
8.02
13-Week Low Price
8.20
4-Week Low Price
8.20
2-Week Low Price
8.20
1-Week Low Price
8.48
High/Low Volume
52-Week High Volume
9,655,000
26-Week High Volume
4,130,000
13-Week High Volume
4,130,000
4-Week High Volume
811,000
2-Week High Volume
811,000
1-Week High Volume
811,000
52-Week Low Volume
0
26-Week Low Volume
0
13-Week Low Volume
0
4-Week Low Volume
0
2-Week Low Volume
0
1-Week Low Volume
356,000
Money Flow
Total Money Flow, Past 52 Weeks
1,896,388,869
Total Money Flow, Past 26 Weeks
736,563,961
Total Money Flow, Past 13 Weeks
326,517,137
Total Money Flow, Past 4 Weeks
73,374,588
Total Money Flow, Past 2 Weeks
43,248,678
Total Money Flow, Past Week
24,696,675
Total Money Flow, 1 Day
5,077,320
Total Volume
Total Volume, Past 52 Weeks
237,818,520
Total Volume, Past 26 Weeks
76,549,000
Total Volume, Past 13 Weeks
34,532,000
Total Volume, Past 4 Weeks
8,157,000
Total Volume, Past 2 Weeks
4,756,000
Total Volume, Past Week
2,681,000
Percent Change in Price
Percent Change in Price, Past 52 Weeks
-34.05
Percent Change in Price, Past 26 Weeks
17.52
Percent Change in Price, Past 13 Weeks
-11.73
Percent Change in Price, Past 4 Weeks
10.91
Percent Change in Price, Past 2 Weeks
8.47
Percent Change in Price, Past Week
11.04
Percent Change in Price, 1 Day
5.34
New High/Low in Price
Reached New 52-Week High Price
False
Reached New 26-Week High Price
False
Reached New 13-Week High Price
False
Reached New 4-Week High Price
True
Reached New 2-Week High Price
True
Reached New 1-Week High Price
True
Reached New 52-Week Low Price
False
Reached New 26-Week Low Price
False
Reached New 13-Week Low Price
False
Reached New 4-Week Low Price
False
Reached New 2-Week Low Price
False
Reached New 1-Week Low Price
False
Consecutive Days/Weeks of Increasing/Decreasing Price
Consecutive Days of Increasing Price
1
Consecutive Weeks of Increasing Price
1
Consecutive Days of Decreasing Price
0
Consecutive Weeks of Decreasing Price
0
Consecutive Days/Weeks of Increasing/Decreasing Volume
Consecutive Days of Increasing Volume
0
Consecutive Weeks of Increasing Volume
2
Consecutive Days of Decreasing Volume
2
Consecutive Weeks of Decreasing Volume
0
New High/Low in Volume
Had New 52-Week High Volume
False
Had New 26-Week High Volume
False
Had New 13-Week High Volume
False
Had New 4-Week High Volume
False
Had New 2-Week High Volume
False
Had New 1-Week High Volume
False
Had New 52-Week Low Volume
False
Had New 26-Week Low Volume
False
Had New 13-Week Low Volume
False
Had New 4-Week Low Volume
False
Had New 2-Week Low Volume
False
Had New 1-Week Low Volume
False
Moving Averages
Simple Moving Average (5-Day)
9.19
Simple Moving Average (10-Day)
9.09
Simple Moving Average (20-Day)
8.98
Simple Moving Average (50-Day)
9.19
Simple Moving Average (100-Day)
9.75
Simple Moving Average (200-Day)
8.49
Previous Simple Moving Average (5-Day)
8.99
Previous Simple Moving Average (10-Day)
9.01
Previous Simple Moving Average (20-Day)
8.93
Previous Simple Moving Average (50-Day)
9.18
Previous Simple Moving Average (100-Day)
9.75
Previous Simple Moving Average (200-Day)
8.47
Technical Indicators
MACD (12, 26, 9)
0.03
MACD (12, 26, 9) Signal
-0.08
Previous MACD (12, 26, 9)
-0.04
Previous MACD (12, 26, 9) Signal
-0.10
RSI (14-Day)
64.02
Previous RSI (14-Day)
56.17
Stochastic (14, 3, 3) %K
87.08
Stochastic (14, 3, 3) %D
68.11
Previous Stochastic (14, 3, 3) %K
66.98
Previous Stochastic (14, 3, 3) %D
51.87
Upper Bollinger Band (20, 2)
9.58
Lower Bollinger Band (20, 2)
8.39
Previous Upper Bollinger Band (20, 2)
9.38
Previous Lower Bollinger Band (20, 2)
8.48
Income Statement Financials
Quarterly Revenue (MRQ)
21,000
Quarterly Net Income (MRQ)
-21,589,000
Previous Quarterly Revenue (QoQ)
2,415,000
Previous Quarterly Revenue (YoY)
2,123,000
Previous Quarterly Net Income (QoQ)
-36,541,000
Previous Quarterly Net Income (YoY)
-57,956,000
Revenue (MRY)
9,684,000
Net Income (MRY)
-244,092,000
Previous Annual Revenue
135,157,000
Previous Net Income
-122,310,000
Cost of Goods Sold (MRY)
Gross Profit (MRY)
9,684,000
Operating Expenses (MRY)
224,324,000
Operating Income (MRY)
-214,640,000
Non-Operating Income/Expense (MRY)
13,811,000
Pre-Tax Income (MRY)
-200,829,000
Normalized Pre-Tax Income (MRY)
-200,829,000
Income after Taxes (MRY)
-244,092,000
Income from Continuous Operations (MRY)
-244,092,000
Consolidated Net Income/Loss (MRY)
-244,092,000
Normalized Income after Taxes (MRY)
-244,092,000
EBIT (MRY)
-214,640,000
EBITDA (MRY)
-210,938,000
Balance Sheet Financials
Current Assets (MRQ)
315,193,000
Property, Plant, and Equipment (MRQ)
2,144,000
Long-Term Assets (MRQ)
11,611,000
Total Assets (MRQ)
326,804,000
Current Liabilities (MRQ)
40,843,000
Long-Term Debt (MRQ)
Long-Term Liabilities (MRQ)
5,487,000
Total Liabilities (MRQ)
46,330,000
Common Equity (MRQ)
280,474,000
Tangible Shareholders Equity (MRQ)
280,474,000
Shareholders Equity (MRQ)
280,474,000
Common Shares Outstanding (MRQ)
53,833,000
Cash Flow Statement Financials
Cash Flow from Operating Activities (MRY)
-163,580,000
Cash Flow from Investing Activities (MRY)
-138,000
Cash Flow from Financial Activities (MRY)
-139,000
Beginning Cash (MRY)
472,248,000
End Cash (MRY)
308,391,000
Increase/Decrease in Cash (MRY)
-163,857,000
Fundamental Ratios
PE Ratio (Current Year Earnings Estimate)
26.74
PE Ratio (Trailing 12 Months)
PEG Ratio (Long Term Growth Estimate)
1.14
Price to Sales Ratio (Trailing 12 Months)
52.03
Price to Book Ratio (Most Recent Quarterly Book Value per Share)
1.80
Price to Cash Ratio (Most Recent Annual Cash Flow per Share)
Pre-Tax Margin (Trailing 12 Months)
-2,073.82
Net Margin (Trailing 12 Months)
-2,520.57
Return on Equity (Trailing 12 Months)
-65.89
Return on Assets (Trailing 12 Months)
-56.00
Current Ratio (Most Recent Fiscal Quarter)
7.72
Quick Ratio (Most Recent Fiscal Quarter)
6.61
Debt to Common Equity (Most Recent Fiscal Quarter)
0.00
Inventory Turnover (Trailing 12 Months)
Book Value per Share (Most Recent Fiscal Quarter)
9.05
Earnings
Fiscal Period End, Next Quarterly Earnings Report
2026-03-31
Quarterly Earnings per Share Estimate
-0.37
Next Expected Quarterly Earnings Report Date
2026-05-14
Days Until Next Expected Quarterly Earnings Report
70
Fiscal Period End, Last Quarterly Earnings Report
2025-12-31
Last Quarterly Earnings per Share Estimate
-0.45
Last Quarterly Earnings per Share
-0.44
Last Quarterly Earnings Report Date
2026-02-19
Days Since Last Quarterly Earnings Report
14
Earnings per Share (Most Recent Fiscal Year)
-4.09
Diluted Earnings per Share (Trailing 12 Months)
-4.54
Dividends
Last Dividend Date
Last Dividend Amount
Days Since Last Dividend
Annual Dividend (Based on Last Quarter)
0.00
Dividend Yield (Based on Last Quarter)
0.00
Percent Growth in Revenue/Net Income
Percent Growth in Quarterly Revenue (QoQ)
-99.13
Percent Growth in Quarterly Revenue (YoY)
-99.01
Percent Growth in Annual Revenue
-92.83
Percent Growth in Quarterly Net Income (QoQ)
40.92
Percent Growth in Quarterly Net Income (YoY)
62.75
Percent Growth in Annual Net Income
-99.57
New High/Low in Revenue/Net Income
New 5-Year High Annual Revenue
False
New 5-Year Low Annual Revenue
True
New 5-Year High Quarterly Revenue (QoQ)
False
New 5-Year Low Quarterly Revenue (QoQ)
True
New 5-Year High Quarterly Revenue (YoY)
False
New 5-Year Low Quarterly Revenue (YoY)
True
New 5-Year High Annual Net Income
False
New 5-Year Low Annual Net Income
True
New 5-Year High Quarterly Net Income (QoQ)
False
New 5-Year Low Quarterly Net Income (QoQ)
False
New 5-Year High Quarterly Net Income (YoY)
False
New 5-Year Low Quarterly Net Income (YoY)
False
Consecutive Quarters/Years of Increasing/Decreasing Revenue/Net Income
Consecutive Quarters of Increasing Revenue (QoQ)
0
Consecutive Quarters of Decreasing Revenue (QoQ)
2
Consecutive Quarters of Increasing Revenue (YoY)
0
Consecutive Quarters of Decreasing Revenue (YoY)
1
Consecutive Years of Increasing Revenue
0
Consecutive Years of Decreasing Revenue
1
Consecutive Quarters of Increasing Net Income (QoQ)
2
Consecutive Quarters of Decreasing Net Income (QoQ)
0
Consecutive Quarters of Increasing Net Income (YoY)
2
Consecutive Quarters of Decreasing Net Income (YoY)
0
Consecutive Years of Increasing Net Income
0
Consecutive Years of Decreasing Net Income
1
Splits
Last Split Date (if within past year)
Last Split Ratio (if within past year)
Days Since Last Split (if within past year)
Volatility Metrics
Historical Volatility (Close-to-Close) (10-Day)
0.5783
Historical Volatility (Close-to-Close) (20-Day)
0.4533
Historical Volatility (Close-to-Close) (30-Day)
0.4887
Historical Volatility (Close-to-Close) (60-Day)
0.4700
Historical Volatility (Close-to-Close) (90-Day)
0.4665
Historical Volatility (Close-to-Close) (120-Day)
0.4793
Historical Volatility (Close-to-Close) (150-Day)
0.4745
Historical Volatility (Close-to-Close) (180-Day)
0.4734
Historical Volatility (Parkinson) (10-Day)
0.5641
Historical Volatility (Parkinson) (20-Day)
0.6523
Historical Volatility (Parkinson) (30-Day)
0.6124
Historical Volatility (Parkinson) (60-Day)
0.5507
Historical Volatility (Parkinson) (90-Day)
0.5290
Historical Volatility (Parkinson) (120-Day)
0.5464
Historical Volatility (Parkinson) (150-Day)
0.5381
Historical Volatility (Parkinson) (180-Day)
0.5285
Implied Volatility (Calls) (10-Day)
0.7849
Implied Volatility (Calls) (20-Day)
0.7858
Implied Volatility (Calls) (30-Day)
0.7881
Implied Volatility (Calls) (60-Day)
0.7211
Implied Volatility (Calls) (90-Day)
0.5899
Implied Volatility (Calls) (120-Day)
0.5201
Implied Volatility (Calls) (150-Day)
0.5202
Implied Volatility (Calls) (180-Day)
0.5203
Implied Volatility (Puts) (10-Day)
0.6501
Implied Volatility (Puts) (20-Day)
0.8324
Implied Volatility (Puts) (30-Day)
1.2880
Implied Volatility (Puts) (60-Day)
1.7817
Implied Volatility (Puts) (90-Day)
1.5109
Implied Volatility (Puts) (120-Day)
1.2969
Implied Volatility (Puts) (150-Day)
1.1481
Implied Volatility (Puts) (180-Day)
0.9992
Implied Volatility (Mean) (10-Day)
0.7175
Implied Volatility (Mean) (20-Day)
0.8091
Implied Volatility (Mean) (30-Day)
1.0380
Implied Volatility (Mean) (60-Day)
1.2514
Implied Volatility (Mean) (90-Day)
1.0504
Implied Volatility (Mean) (120-Day)
0.9085
Implied Volatility (Mean) (150-Day)
0.8341
Implied Volatility (Mean) (180-Day)
0.7598
Put-Call Implied Volatility Ratio (10-Day)
0.8282
Put-Call Implied Volatility Ratio (20-Day)
1.0592
Put-Call Implied Volatility Ratio (30-Day)
1.6344
Put-Call Implied Volatility Ratio (60-Day)
2.4708
Put-Call Implied Volatility Ratio (90-Day)
2.5614
Put-Call Implied Volatility Ratio (120-Day)
2.4934
Put-Call Implied Volatility Ratio (150-Day)
2.2070
Put-Call Implied Volatility Ratio (180-Day)
1.9206
Implied Volatility Skew (10-Day)
Implied Volatility Skew (20-Day)
Implied Volatility Skew (30-Day)
Implied Volatility Skew (60-Day)
0.2155
Implied Volatility Skew (90-Day)
0.3197
Implied Volatility Skew (120-Day)
0.3361
Implied Volatility Skew (150-Day)
0.2519
Implied Volatility Skew (180-Day)
0.1678
Option Statistics
Put-Call Ratio (Volume) (10-Day)
0.0588
Put-Call Ratio (Volume) (20-Day)
0.0504
Put-Call Ratio (Volume) (30-Day)
0.0294
Put-Call Ratio (Volume) (60-Day)
0.0256
Put-Call Ratio (Volume) (90-Day)
0.0735
Put-Call Ratio (Volume) (120-Day)
0.0839
Put-Call Ratio (Volume) (150-Day)
0.0517
Put-Call Ratio (Volume) (180-Day)
0.0194
Put-Call Ratio (Open Interest) (10-Day)
0.5022
Put-Call Ratio (Open Interest) (20-Day)
0.4304
Put-Call Ratio (Open Interest) (30-Day)
0.2511
Put-Call Ratio (Open Interest) (60-Day)
0.1530
Put-Call Ratio (Open Interest) (90-Day)
0.4400
Put-Call Ratio (Open Interest) (120-Day)
0.5027
Put-Call Ratio (Open Interest) (150-Day)
0.3094
Put-Call Ratio (Open Interest) (180-Day)
0.1160
Percentiles Within Industry of Price Performance
Percentile Within Industry, Percent Change in Price, Past 52 Weeks
32.23
Percentile Within Industry, Percent Change in Price, Past 26 Weeks
60.30
Percentile Within Industry, Percent Change in Price, Past 13 Weeks
41.86
Percentile Within Industry, Percent Change in Price, Past 4 Weeks
71.10
Percentile Within Industry, Percent Change in Price, Past 2 Weeks
69.93
Percentile Within Industry, Percent Change in Price, Past Week
91.53
Percentile Within Industry, Percent Change in Price, 1 Day
77.91
Percentiles Within Industry of Revenue/Net Income Growth
Percentile Within Industry, Percent Growth in Quarterly Revenue (QoQ)
1.17
Percentile Within Industry, Percent Growth in Quarterly Revenue (YoY)
1.23
Percentile Within Industry, Percent Growth in Annual Revenue
3.83
Percentile Within Industry, Percent Growth in Quarterly Net Income (QoQ)
85.25
Percentile Within Industry, Percent Growth in Quarterly Net Income (YoY)
85.97
Percentile Within Industry, Percent Growth in Annual Net Income
13.01
Percentiles Within Industry of Fundamental Ratios and Percentages
Percentile Within Industry, PE Ratio (Current Year Earnings Estimate)
53.62
Percentile Within Industry, PE Ratio (Trailing 12 Months)
Percentile Within Industry, PEG Ratio (Long Term Growth Estimate)
70.59
Percentile Within Industry, Price to Sales Ratio (Trailing 12 Months)
81.32
Percentile Within Industry, Price to Book Ratio (Most Recent Quarterly Book Value per Share)
38.60
Percentile Within Industry, Price to Cash Ratio (Most Recent Annual Cash Flow per Share)
Percentile Within Industry, Pre-Tax Margin (Trailing 12 Months)
24.53
Percentile Within Industry, Net Margin (Trailing 12 Months)
14.52
Percentile Within Industry, Return on Equity (Trailing 12 Months)
51.97
Percentile Within Industry, Return on Assets (Trailing 12 Months)
44.86
Percentile Within Industry, Current Ratio (Most Recent Fiscal Quarter)
68.06
Percentile Within Industry, Quick Ratio (Most Recent Fiscal Quarter)
63.49
Percentile Within Industry, Debt to Common Equity (Most Recent Fiscal Quarter)
70.42
Percentile Within Industry, Inventory Turnover (Trailing 12 Months)
Percentile Within Industry, Dividend Yield (Based on Last Quarter)
99.17
Percentile Within Industry, Percentage Held By Insiders (Latest Annual Proxy Report)
54.67
Percentile Within Industry, Percentage Held By Institutions (Latest 13F Reports)
95.21
Percentiles Within Sector of Price Performance
Percentile Within Sector, Percent Change in Price, Past 52 Weeks
32.20
Percentile Within Sector, Percent Change in Price, Past 26 Weeks
65.91
Percentile Within Sector, Percent Change in Price, Past 13 Weeks
44.44
Percentile Within Sector, Percent Change in Price, Past 4 Weeks
76.65
Percentile Within Sector, Percent Change in Price, Past 2 Weeks
75.99
Percentile Within Sector, Percent Change in Price, Past Week
91.15
Percentile Within Sector, Percent Change in Price, 1 Day
82.58
Percentiles Within Sector of Revenue/Net Income Growth
Percentile Within Sector, Percent Growth in Quarterly Revenue (QoQ)
0.92
Percentile Within Sector, Percent Growth in Quarterly Revenue (YoY)
0.63
Percentile Within Sector, Percent Growth in Annual Revenue
1.71
Percentile Within Sector, Percent Growth in Quarterly Net Income (QoQ)
82.07
Percentile Within Sector, Percent Growth in Quarterly Net Income (YoY)
82.42
Percentile Within Sector, Percent Growth in Annual Net Income
13.49
Percentiles Within Sector of Fundamental Ratios and Percentages
Percentile Within Sector, PE Ratio (Current Year Earnings Estimate)
68.44
Percentile Within Sector, PE Ratio (Trailing 12 Months)
Percentile Within Sector, PEG Ratio (Long Term Growth Estimate)
25.69
Percentile Within Sector, Price to Sales Ratio (Trailing 12 Months)
90.95
Percentile Within Sector, Price to Book Ratio (Most Recent Quarterly Book Value per Share)
40.84
Percentile Within Sector, Price to Cash Ratio (Most Recent Annual Cash Flow per Share)
Percentile Within Sector, Pre-Tax Margin (Trailing 12 Months)
13.81
Percentile Within Sector, Net Margin (Trailing 12 Months)
7.34
Percentile Within Sector, Return on Equity (Trailing 12 Months)
40.31
Percentile Within Sector, Return on Assets (Trailing 12 Months)
33.20
Percentile Within Sector, Current Ratio (Most Recent Fiscal Quarter)
78.57
Percentile Within Sector, Quick Ratio (Most Recent Fiscal Quarter)
75.59
Percentile Within Sector, Debt to Common Equity (Most Recent Fiscal Quarter)
55.35
Percentile Within Sector, Inventory Turnover (Trailing 12 Months)
Percentile Within Sector, Dividend Yield (Based on Last Quarter)
93.02
Percentile Within Sector, Percentage Held By Insiders (Latest Annual Proxy Report)
59.76
Percentile Within Sector, Percentage Held By Institutions (Latest 13F Reports)
93.84
Percentiles Within Market of Price Performance
Percentile Within Market, Percent Change in Price, Past 52 Weeks
14.37
Percentile Within Market, Percent Change in Price, Past 26 Weeks
78.91
Percentile Within Market, Percent Change in Price, Past 13 Weeks
21.58
Percentile Within Market, Percent Change in Price, Past 4 Weeks
89.82
Percentile Within Market, Percent Change in Price, Past 2 Weeks
89.32
Percentile Within Market, Percent Change in Price, Past Week
95.42
Percentile Within Market, Percent Change in Price, 1 Day
92.00
Percentiles Within Market of Revenue/Net Income Growth
Percentile Within Market, Percent Growth in Quarterly Revenue (QoQ)
0.55
Percentile Within Market, Percent Growth in Quarterly Revenue (YoY)
0.36
Percentile Within Market, Percent Growth in Annual Revenue
0.44
Percentile Within Market, Percent Growth in Quarterly Net Income (QoQ)
74.51
Percentile Within Market, Percent Growth in Quarterly Net Income (YoY)
75.24
Percentile Within Market, Percent Growth in Annual Net Income
15.54
Percentiles Within Market of Fundamental Ratios and Percentages
Percentile Within Market, PE Ratio (Current Year Earnings Estimate)
76.35
Percentile Within Market, PE Ratio (Trailing 12 Months)
Percentile Within Market, PEG Ratio (Long Term Growth Estimate)
31.23
Percentile Within Market, Price to Sales Ratio (Trailing 12 Months)
97.09
Percentile Within Market, Price to Book Ratio (Most Recent Quarterly Book Value per Share)
49.23
Percentile Within Market, Price to Cash Ratio (Most Recent Annual Cash Flow per Share)
Percentile Within Market, Pre-Tax Margin (Trailing 12 Months)
3.77
Percentile Within Market, Net Margin (Trailing 12 Months)
1.85
Percentile Within Market, Return on Equity (Trailing 12 Months)
14.59
Percentile Within Market, Return on Assets (Trailing 12 Months)
10.28
Percentile Within Market, Current Ratio (Most Recent Fiscal Quarter)
90.76
Percentile Within Market, Quick Ratio (Most Recent Fiscal Quarter)
89.84
Percentile Within Market, Debt to Common Equity (Most Recent Fiscal Quarter)
31.19
Percentile Within Market, Inventory Turnover (Trailing 12 Months)
Percentile Within Market, Dividend Yield (Based on Last Quarter)
61.96
Percentile Within Market, Percentage Held By Insiders (Latest Annual Proxy Report)
63.39
Percentile Within Market, Percentage Held By Institutions (Latest 13F Reports)
94.91