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Prothena (PRTA) Key Ratios

Stock Card factsheet share-fund-plan-icon

$9.75

up-down-arrow $0.15 (1.56%)

As on 04-Sep-2026 13:39EDT

Market cap

info icon

$479 Mln

Revenue (TTM)

info icon

$55 Mln

P/E Ratio

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--

P/B Ratio

info icon

1.6

Div. Yield

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0 %

Key Ratios and Highlights

Growth Score (%) Quarterly Annual (TTM)
Particulars QoQ YoY 1-Year 3-Years 5-Years
Revenue -98.02 -77.15 427.32 -1.83 -2.14
EBIT -156.78 64.27 81.26 18.39 5.92
Net Profit -156.79 85.22 85.48 19.06 6.58
EPS -158.93 84.75 85.23 19.36 9.22
Book Value -- -- -42.42 -23.25 2.48
Key Ratios (%) Average Annual (TTM)
Particulars3-Years5-YearsTTMDec-25Dec-24
EBIT-Margin info -781.62-510.60-79.97-2,073.82-95.39
Net Margin info --33.41-80.67----
Return on equity info -37.27-22.54-15.51-63.62-23.34
Return on Capital info -36.31-22.08---61.63-22.84
Return on Assets info -31.92-19.73-11.26-55.86-19.67
Debt to Equity (x) info ----0.000.050.02

Profitability

View Detailed Peer Comparison

ROCE

--

--

Earning before interest and taxes / (Average net worth + Average total Debt) * 100

Company Name
TTM
Dec-25
Dec-24
Dec-23
Dec-22
Prothena (PRTA)
--
-61.63
-22.84
-24.47
-21.13
Peer Median
--
--
--
--
--
*TTM (Trailing Twelve Months) data based on income statement of last 4 quarters and interim half yearly balance sheet.
ROE

-15.51

--

Profit after tax / Average Net worth * 100

Company Name
TTM
Dec-25
Dec-24
Dec-23
Dec-22
Prothena (PRTA)
-15.51
-63.62
-23.34
-24.85
-21.50
Peer Median
--
--
--
--
--
*TTM (Trailing Twelve Months) data based on income statement of last 4 quarters and interim half yearly balance sheet.
ROA

-11.26

--

Profit after tax / Average Total assets * 100

Company Name
TTM
Dec-25
Dec-24
Dec-23
Dec-22
Prothena (PRTA)
-11.26
-55.86
-19.67
-20.22
-17.11
Peer Median
--
--
--
--
--
*TTM (Trailing Twelve Months) data based on income statement of last 4 quarters and interim half yearly balance sheet.
EBIT Margin

-79.97

--

Operating profit (EBIT) / Net Sales * 100

Company Name
TTM
Dec-25
Dec-24
Dec-23
Dec-22
Prothena (PRTA)
-79.97
-2,073.82
-95.39
-175.64
-244.05
Peer Median
--
--
--
--
--
*TTM (Trailing Twelve Months) data based on income statement of last 4 quarters and interim half yearly balance sheet.
Net Margin

-80.67

--

Net profit / Total Income (Net sales plus other income) * 100

Company Name
TTM
Dec-25
Dec-24
Dec-23
Dec-22
Prothena (PRTA)
-80.67
-2,520.57
-90.49
-160.91
-216.95
Peer Median
--
--
--
--
--
*TTM (Trailing Twelve Months) data based on income statement of last 4 quarters and interim half yearly balance sheet.
Cash Profit Margin

0.00

--

(Net profit + Depreciation) / Gross Sales * 100

Company Name
TTM
Dec-25
Dec-24
Dec-23
Dec-22
Prothena (PRTA)
0.00
--
--
--
--
Peer Median
--
--
--
--
--
*TTM (Trailing Twelve Months) data based on income statement of last 4 quarters and interim half yearly balance sheet.

Growth

View Detailed Peer Comparison

Revenue Growth

427.32

--

Year on year growth in net sales

Company Name
TTM
Dec-25
Dec-24
Dec-23
Dec-22
Prothena (PRTA)
427.32
-0.93
0.48
0.70
-0.73
Peer Median
--
--
--
--
--
*TTM (Trailing Twelve Months) data based on income statement of last 4 quarters and interim half yearly balance sheet.
EBIT Growth

81.26

--

Year on year growth in operating profit (EBIT)

Company Name
TTM
Dec-25
Dec-24
Dec-23
Dec-22
Prothena (PRTA)
81.26
-55.77
19.66
-21.99
-282.78
Peer Median
--
--
--
--
--
*TTM (Trailing Twelve Months) data based on income statement of last 4 quarters and interim half yearly balance sheet.
Net Profit Growth

85.48

--

Year on year growth in profit after tax

Company Name
TTM
Dec-25
Dec-24
Dec-23
Dec-22
Prothena (PRTA)
85.48
-99.57
16.81
-25.72
-274.62
Peer Median
--
--
--
--
--
*TTM (Trailing Twelve Months) data based on income statement of last 4 quarters and interim half yearly balance sheet.
EPS Growth

85.23

--

Year on year growth in earnings per share

Company Name
TTM
Dec-25
Dec-24
Dec-23
Dec-22
Prothena (PRTA)
85.23
-1.00
0.17
-0.26
-2.51
Peer Median
--
--
--
--
--
*TTM (Trailing Twelve Months) data based on income statement of last 4 quarters and interim half yearly balance sheet.
Book Value Growth

-8.69

--

Year on year growth in book value per share

Company Name
TTM
Dec-25
Dec-24
Dec-23
Dec-22
Prothena (PRTA)
-8.69
--
--
--
--
Peer Median
--
--
--
--
--
*TTM (Trailing Twelve Months) data based on income statement of last 4 quarters and interim half yearly balance sheet.

Solvency

View Detailed Peer Comparison

Debt to Equity

--

--

Total debt / Net worth

Company Name
TTM
Dec-25
Dec-24
Dec-23
Dec-22
Prothena (PRTA)
--
0.05
0.02
0.02
0.01
Peer Median
--
--
--
--
--
*TTM (Trailing Twelve Months) data based on income statement of last 4 quarters and interim half yearly balance sheet.
Short term debt to equity ratio

0.01

--

(Short term borrowings / Net worth)

Company Name
TTM
Dec-25
Dec-24
Dec-23
Dec-22
Prothena (PRTA)
0.01
0.01
0.01
0.00
0.01
Peer Median
--
--
--
--
--
*TTM (Trailing Twelve Months) data based on income statement of last 4 quarters and interim half yearly balance sheet.
Current Ratio

25.05

--

Current Assets / Current Liabilities and Provisions

Company Name
TTM
Dec-25
Dec-24
Dec-23
Dec-22
Prothena (PRTA)
25.05
7.72
10.01
11.24
14.34
Peer Median
--
--
--
--
--
*TTM (Trailing Twelve Months) data based on income statement of last 4 quarters and interim half yearly balance sheet.
Quick Ratio

25.05

--

(Current Assets - Inventory) / Current Liabilities and Provisions

Company Name
TTM
Dec-25
Dec-24
Dec-23
Dec-22
Prothena (PRTA)
25.05
--
--
11.33
14.34
Peer Median
--
--
--
--
--
*TTM (Trailing Twelve Months) data based on income statement of last 4 quarters and interim half yearly balance sheet.
Interest Coverage

--

--

Earning before interest and taxes (EBIT) / Interest Expenses

Company Name
TTM
Dec-25
Dec-24
Dec-23
Dec-22
Prothena (PRTA)
--
--
--
--
-19.65
Peer Median
--
--
--
--
--
*TTM (Trailing Twelve Months) data based on income statement of last 4 quarters and interim half yearly balance sheet.

Operating Efficiency

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Debtors to sales

--

--

Debtors outstanding / Net Sales * 100

Company Name
TTM
Dec-25
Dec-24
Dec-23
Dec-22
Prothena (PRTA)
--
--
--
5.65
0.12
Peer Median
--
--
--
--
--
*TTM (Trailing Twelve Months) data based on income statement of last 4 quarters and interim half yearly balance sheet.
Asset Turnover

0.14

--

Sales / Average Total Assets

Company Name
TTM
Dec-25
Dec-24
Dec-23
Dec-22
Prothena (PRTA)
0.14
0.02
0.22
0.13
0.08
Peer Median
--
--
--
--
--
*TTM (Trailing Twelve Months) data based on income statement of last 4 quarters and interim half yearly balance sheet.
Receivable days

--

--

Average Debtors / Sales * 365

Company Name
TTM
Dec-25
Dec-24
Dec-23
Dec-22
Prothena (PRTA)
--
--
6.97
10.44
0.25
Peer Median
--
--
--
--
--
*TTM (Trailing Twelve Months) data based on income statement of last 4 quarters and interim half yearly balance sheet.
Inventory Days

--

--

Average Inventory / Sales * 365

Company Name
TTM
Dec-25
Dec-24
Dec-23
Dec-22
Prothena (PRTA)
--
--
-525.61
-4.32
-2.03
Peer Median
--
--
--
--
--
*TTM (Trailing Twelve Months) data based on income statement of last 4 quarters and interim half yearly balance sheet.
Payable days

--

--

Average Creditors / Cost of goods sold * 365

Company Name
TTM
Dec-25
Dec-24
Dec-23
Dec-22
Prothena (PRTA)
--
673.13
1,689.27
28.70
351.14
Peer Median
--
--
--
--
--
*TTM (Trailing Twelve Months) data based on income statement of last 4 quarters and interim half yearly balance sheet.
Cash Conversion Cycle

--

--

Receivable Days + Inventory Days - Payable Days

Company Name
TTM
Dec-25
Dec-24
Dec-23
Dec-22
Prothena (PRTA)
--
--
-2,207.91
-22.59
-352.91
Peer Median
--
--
--
--
--
*TTM (Trailing Twelve Months) data based on income statement of last 4 quarters and interim half yearly balance sheet.

Valuation

View Detailed Peer Comparison

Price / Earnings

--

--

Current share price divided by earning per share in the last twelve months

Company Name
TTM
Dec-25
Dec-24
Dec-23
Dec-22
Prothena (PRTA)
--
-2.11
-6.09
-13.26
-27.81
Peer Median
--
--
--
--
--
*TTM (Trailing Twelve Months) data based on income statement of last 4 quarters and interim half yearly balance sheet.
Price / Book Value

1.62

--

Current share price divided by book value per share in the latest financial year

Company Name
TTM
Dec-25
Dec-24
Dec-23
Dec-22
Prothena (PRTA)
1.62
1.83
1.53
3.47
5.23
Peer Median
--
--
--
--
--
*TTM (Trailing Twelve Months) data based on income statement of last 4 quarters and interim half yearly balance sheet.
Dividend Yield

--

--

Dividend per share in the past twelve months divided by current share price

Company Name
TTM
Dec-25
Dec-24
Dec-23
Dec-22
Prothena (PRTA)
--
--
--
--
--
Peer Median
--
--
--
--
--
*TTM (Trailing Twelve Months) data based on income statement of last 4 quarters and interim half yearly balance sheet.
EV/EBITDA

-3.58

--

Enterprise Value (Current Market Capitalisation + Total Debt - Cash & Equivalents) / Earnings before interest, taxes, depreciation and taxes (EBITDA)

Company Name
TTM
Dec-25
Dec-24
Dec-23
Dec-22
Prothena (PRTA)
-3.58
-1.12
-2.22
-8.42
-19.48
Peer Median
--
--
--
--
--
*TTM (Trailing Twelve Months) data based on income statement of last 4 quarters and interim half yearly balance sheet.
Market Cap

479

--

Current Share price multiplied by latest total number of shares outstanding

Company Name
TTM
Dec-25
Dec-24
Dec-23
Dec-22
Prothena (PRTA)
479
--
--
--
--
Peer Median
--
--
--
--
--
*TTM (Trailing Twelve Months) data based on income statement of last 4 quarters and interim half yearly balance sheet.
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