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PRTA (Prothena Corporation plc) Stock Financials & Earnings | Market Cap Arena
PRTA
Prothena Corporation plc
Mkt Cap
$549M
Healthcare
·
Biotechnology
·
🇮🇪 Ireland
·
NASDAQ
Revenue (TTM)
$10M
Net Income (TTM)
-$244M
EPS (TTM)
-$4.54
Free Cash Flow (TTM)
-$168M
Gross Margin
-208.6%
Op. Margin
-2247.5%
Net Margin
-2520.6%
FCF Margin
-1730.4%
P/S Ratio (TTM)
56.6x
P/E Ratio (TTM)
—
YoY Rev Growth
-92.8%
Employees
—
Earnings Reports
▶
Q4 2025
NEW
Browse All Reports
Quarterly
FY
Revenue & Profitability
Revenue
Gross Profit
Operating Income
Quarter
Revenue
Gross Profit
Op. Income
Q1 23
$2M
-$43M
-$56M
Q2 23
$4M
-$52M
-$67M
Q3 23
$85M
$27M
$10M
Q4 23
$316K
-$62M
-$79M
Q1 24
$50K
$50K
-$82M
Q2 24
$132M
$132M
$58M
Q3 24
$970K
$970K
-$67M
Q4 24
$2M
$2M
-$65M
Q1 25
$3M
$3M
-$66M
Q2 25
$4M
$4M
-$85M
Q3 25
$2M
-$27M
-$40M
Q4 25
$21K
-$921K
-$27M
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Valuation
P/S Ratio
P/E Ratio
Quarter
P/S
P/E
Q1 23
10.0x
—
Q2 23
9.5x
—
Q3 23
3.9x
—
Q4 23
6.0x
—
Q1 24
6.1x
—
Q2 24
2.5x
—
Q3 24
4.1x
—
Q4 24
4.1x
—
Q1 25
4.0x
—
Q2 25
53.0x
—
Q3 25
46.5x
—
Q4 25
56.6x
—
marketcaparena.com
Operating Cash Flow
Operating Cash Flow
Free Cash Flow
Quarter
Operating CF
Free CF
Q1 23
-$47M
-$48M
Q2 23
-$45M
-$46M
Q3 23
$10M
$9M
Q4 23
-$51M
-$53M
Q1 24
-$73M
-$73M
Q2 24
$16M
$16M
Q3 24
-$45M
-$45M
Q4 24
-$48M
-$48M
Q1 25
-$53M
-$53M
Q2 25
-$46M
-$46M
Q3 25
-$41M
-$41M
Q4 25
-$27M
-$27M
marketcaparena.com
Capital Expenditures
CapEx
Quarter
CapEx
Q1 23
$48K
Q2 23
$771K
Q3 23
$442K
Q4 23
$2M
Q1 24
$103K
Q2 24
$143K
Q3 24
$9K
Q4 24
$43K
Q1 25
$42K
Q2 25
$86K
Q3 25
$10K
Q4 25
$5K
marketcaparena.com
OpEx vs Revenue Growth (YoY)
Revenue Growth
OpEx Growth
Quarter
Revenue Growth
OpEx Growth
Q1 23
+88.1%
+49.6%
Q2 23
+206.3%
+58.4%
Q3 23
+5494.3%
+43.8%
Q4 23
-99.4%
+57.7%
Q1 24
-97.7%
+39.5%
Q2 24
+3184.7%
+4.4%
Q3 24
-98.9%
-9.5%
Q4 24
+571.8%
-15.0%
Q1 25
+5556.0%
-16.1%
Q2 25
-96.7%
+20.9%
Q3 25
+149.0%
-36.8%
Q4 25
-99.0%
-59.4%
marketcaparena.com
Stock-Based Compensation
SBC ($)
% of Revenue
Quarter
SBC ($)
% of Revenue
Q1 23
$9M
405.3%
Q2 23
$10M
251.3%
Q3 23
$11M
12.9%
Q4 23
$11M
3506.3%
Q1 24
$12M
24766.0%
Q2 24
$12M
9.1%
Q3 24
$11M
1136.1%
Q4 24
$11M
495.5%
Q1 25
$11M
387.2%
Q2 25
$12M
281.0%
Q3 25
$7M
298.1%
Q4 25
$7M
33685.7%
marketcaparena.com
OpEx Breakdown
R&D
G&A
Quarter
R&D
G&A
Q1 23
$45M
$14M
Q2 23
$56M
$15M
Q3 23
$58M
$17M
Q4 23
$62M
$17M
Q1 24
$64M
$17M
Q2 24
$58M
$16M
Q3 24
$51M
$17M
Q4 24
$50M
$17M
Q1 25
$51M
$18M
Q2 25
$41M
$16M
Q3 25
$29M
$13M
Q4 25
$15M
$13M
marketcaparena.com
Revenue Segments
Collaboration
License
Quarter
Collaboration
License
Q4 23
$316K
—
Q1 24
—
$50K
Q2 24
$132M
—
Q3 24
$970K
—
Q1 25
$3M
$50K
Q2 25
$4M
—
Q3 25
$2M
—
Q4 25
$21K
—
marketcaparena.com
War Chest
Cash & Equivalents
Short-Term Investments
Quarter
Cash
Short-term Investments
Total
Q1 23
$686M
$0
$686M
Q2 23
$659M
$0
$659M
Q3 23
$671M
$0
$671M
Q4 23
$619M
$0
$619M
Q1 24
$547M
$0
$547M
Q2 24
$564M
$0
$564M
Q3 24
$519M
$0
$519M
Q4 24
$471M
$0
$471M
Q1 25
$418M
$0
$418M
Q2 25
$371M
$0
$371M
Q3 25
$331M
$0
$331M
Q4 25
$308M
$0
$308M
marketcaparena.com
Shares Outstanding
Shares Outstanding
Quarter
Shares (Diluted)
QoQ Change
Q1 23
53M
-2.7%
Q2 23
53M
+1.2%
Q3 23
58M
+9.2%
Q4 23
54M
-7.5%
Q1 24
54M
+0.1%
Q2 24
55M
+2.5%
Q3 24
54M
-2.3%
Q4 24
54M
+0.0%
Q1 25
54M
+0.0%
Q2 25
54M
+0.0%
Q3 25
54M
+0.0%
Q4 25
54M
+0.0%
marketcaparena.com
Revenue Per Employee
Revenue / Employee
Year
Revenue/Employee
Employees
FY 14
$1M
46
FY 15
$24K
66
FY 16
$11K
96
FY 17
$220K
125
FY 18
$16K
59
FY 19
$16K
51
FY 20
$13K
66
FY 21
$2M
82
FY 22
$424K
127
FY 23
$528K
173
FY 24
$829K
163
FY 25
$97K
100
marketcaparena.com