Amarin Corporation plc (AMRN) P/E Ratio History
Deep ValueTrading at -8.6x · 0th percentile of 5-year range · Significant discount to historical valuation · Data 2011–2021
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P/E Ratio Analysis
As of July 8, 2026, Amarin Corporation plc (AMRN) trades at a price-to-earnings ratio of -8.6x, with a stock price of $15.46 and trailing twelve-month earnings per share of $-1.62.
The current P/E is 107% below its 5-year average of 117.4x. Over the past five years, AMRN's P/E has ranged from a low of 3.1x to a high of 522.7x, placing the current valuation at the 0th percentile of its historical range.
Compared to the Healthcare sector median P/E of 23.4x, AMRN trades at a 137% discount to its sector peers. The sector includes 231 companies with P/E ratios ranging from 0.0x to 198.8x.
Relative to the broader market, AMRN trades at a notable discount to the S&P 500 median P/E of 25.9x. Investors should consider the company's growth prospects, competitive position, and earnings quality when evaluating whether the current valuation is justified.
For a comprehensive intrinsic value estimate using discounted cash flow analysis, see our AMRN DCF Valuation Calculator →
Note: P/E ratio is just one valuation metric. It does not account for balance sheet strength, cash flow quality, or growth sustainability. Always conduct comprehensive due diligence before making investment decisions.
AMRN Cross-Benchmark Valuation
How does the current P/E compare to sector peers and the broader market?
AMRN P/E vs Peers
Commercial Specialty Pharma peers sorted by market cap
| Company | Market Cap | P/E Ratio | PEG Ratio | EPS Growth (1Y) |
|---|---|---|---|---|
| $4B | 11.4Lowest | - | +68% | |
| $2B | 14.1 | - | +8% | |
| $1B | 27.8 | 3.73 | +1883%Best | |
| $450B | 107.4 | - | -1% | |
| $137B | 17.7 | - | -4% | |
| $299B | 29.5 | 1.35 | +191% | |
| $221B | 14.1 | 0.68Best | +2% |
Lower P/E can signal a discount or weaker growth expectations; PEG adds growth context.
AMRN Historical P/E Data (2011–2021)
Quarterly P/E ratios calculated from closing price and TTM EPS
| Quarter | Period End | Price | TTM EPS | P/E Ratio | vs Avg |
|---|---|---|---|---|---|
| FY2021 Q4 | Dec 31 2021 | $67.40 | $0.46 | 147.3x | +25% |
| FY2021 Q2 | Jun 30 2021 | $87.60 | $0.17 | 522.7x | +345% |
| FY2012 Q1 | Mar 31 2012 | $226.40 | $33.62 | 6.7x | -94% |
| FY2011 Q4 | Dec 31 2011 | $149.80 | $49.00 | 3.1x | -97% |
| FY2011 Q3 | Sep 30 2011 | $184.00 | $21.61 | 8.5x | -93% |
| FY2011 Q2 | - | $288.60 | $17.61 | 16.4x | -86% |
Average P/E for displayed period: 117.4x
Intrinsic Valuation
DCF models, multiple analysis, and analyst estimates.
Historical Returns
15+ years return with dividends reinvested.
DCA Calculator
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Peer Comparison
Compare growth, multiples, and margins vs sector.
AMRN — Frequently Asked Questions
Quick answers to the most common questions about buying AMRN stock.
What is AMRN's P/E ratio?
Amarin Corporation plc (AMRN) trailing twelve-month P/E ratio is -8.6x, based on TTM diluted EPS of $-1.62. The 5-year average P/E is 117.4x and the historical range spans 3.1x to 522.7x.
Is AMRN stock overvalued or undervalued?
AMRN trades at -8.6x P/E, below its 5-year average of 117.4x. At the 0th percentile of its historical range (3.1x–522.7x), the stock is priced at a discount to its own history.
Is AMRN stock expensive?
No, AMRN is not expensive on a historical basis. The current P/E of -8.6x is below the 5-year average of 117.4x and sits at the 0th percentile of its valuation range.
What is AMRN's historical P/E range?
Over the past 5 years, AMRN's P/E ratio has ranged from 3.1x to 522.7x, with a median of 16.4x and an average of 117.4x. The current P/E of -8.6x places the stock at the 0th percentile of this range. Full historical data spans 2011–2021.
How does AMRN's P/E compare to the S&P 500?
AMRN trades at -8.6x P/E versus the S&P 500 median of 25.9x. The 133% discount to the market suggests lower growth expectations or perceived higher risk.
How does AMRN's valuation compare to Healthcare peers?
Amarin Corporation plc P/E of -8.6x compares to the Healthcare sector median of 23.4x. The discount suggests lower growth expectations, weaker margins, or higher perceived risk relative to peers. See the peer comparison table on this page for ticker-by-ticker P/E and PEG.
What is AMRN's PEG ratio?
AMRN PEG ratio is N/A, based on a P/E of -8.6x and EPS growth of 55.0%. PEG normalises P/E by growth and helps compare stocks with different earnings trajectories.
What is AMRN's earnings yield?
AMRN earnings yield is N/A, the inverse of its -8.6x P/E ratio. Earnings yield represents the percentage of each dollar invested that the company earns. It can be compared directly to bond yields to assess relative attractiveness of stocks versus fixed income.