Amarin Corporation plc (AMRN) P/E Ratio History
Historical price-to-earnings valuation from 2011 to 2021
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AMRN Valuation Context
How does the current P/E compare to historical and market benchmarks?
P/E Ratio Analysis
As of May 8, 2026, Amarin Corporation plc (AMRN) trades at a price-to-earnings ratio of -8.2x, with a stock price of $14.84 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 22.3x, AMRN trades at a 137% discount to its sector peers. The sector includes 241 companies with P/E ratios ranging from 0.0x to 177.5x.
Relative to the broader market, AMRN trades at a notable discount to the S&P 500 median P/E of 25.1x. 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 P/E vs Peers
P/E ratio compared to closely matched public peers
| Company | Market Cap | P/E Ratio | PEG Ratio | EPS Growth (1Y) |
|---|---|---|---|---|
| $4B | 9.9Lowest | - | +68% | |
| $2B | 11.6 | - | +8% | |
| $2B | 36.3 | 4.85 | +1883%Best | |
| $358B | 85.5 | - | -1% | |
| $151B | 19.5 | - | -4% | |
| $283B | 27.9 | 1.28 | +191% | |
| $203B | 12.7 | 0.61Best | +2% |
Peers sorted by market capitalization. P/E below peers may indicate undervaluation or lower growth expectations. Consider PEG ratio for growth-adjusted comparison.
AMRN Historical P/E Data (2011–2021)
Quarterly P/E ratios calculated from closing price and TTM EPS
| Quarter | Date | Price | TTM EPS | P/E Ratio | vs Avg |
|---|---|---|---|---|---|
| FY2021 Q4 | Fri Dec 31 2021 00:00:00 GM | $67.40 | $0.46 | 147.3x | +25% |
| FY2021 Q2 | Wed Jun 30 2021 00:00:00 GM | $87.60 | $0.17 | 522.7x | +345% |
| FY2012 Q1 | Sat Mar 31 2012 00:00:00 GM | $226.40 | $33.62 | 6.7x | -94% |
| FY2011 Q4 | Sat Dec 31 2011 00:00:00 GM | $149.80 | $49.00 | 3.1x | -97% |
| FY2011 Q3 | Fri Sep 30 2011 00:00:00 GM | $184.00 | $21.61 | 8.5x | -93% |
| FY2011 Q2 | $288.60 | $17.61 | 16.4x | -86% |
Average P/E for displayed period: 117.4x
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Start ComparisonAMRN — Frequently Asked Questions
Quick answers to the most common questions about buying AMRN stock.
Is AMRN stock overvalued or undervalued?
AMRN trades at -8.2x P/E, below its 5-year average of 117.4x. At the N/A percentile of historical range, the stock is priced at a discount to its own history.
How does AMRN's valuation compare to peers?
Amarin Corporation plc P/E of -8.2x compares to sector median of 22.3x. The discount suggests lower growth expectations or higher risk.
What is AMRN's PEG ratio?
AMRN PEG ratio is N/A. Above 2.0 indicates premium valuation relative to growth rate. Historical P/E data spans 2011-2021.