Alkermes plc (ALKS) P/E Ratio History
Deep ValueTrading at -9999.0x · 0th percentile of 5-year range · Significant discount to historical valuation · Data 2006–2026
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P/E Ratio Analysis
As of November 8, 2026, Alkermes plc (ALKS) trades at a price-to-earnings ratio of -9999.0x, with a stock price of $45.90 and trailing twelve-month earnings per share of $-0.00.
The current P/E is 12876% below its 5-year average of 78.3x. Over the past five years, ALKS's P/E has ranged from a low of 8.9x to a high of 467.1x, placing the current valuation at the 0th percentile of its historical range.
Compared to the Healthcare sector median P/E of 24.6x, ALKS trades at a 40735% discount to its sector peers. The sector includes 242 companies with P/E ratios ranging from 0.0x to 196.0x.
Relative to the broader market, ALKS trades at a notable discount to the S&P 500 median P/E of 21.8x. 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 ALKS 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.
ALKS Cross-Benchmark Valuation
How does the current P/E compare to sector peers and the broader market?
ALKS P/E vs Peers
Branded Specialty Pharma peers sorted by market cap
| Company | Market Cap | P/E Ratio | PEG Ratio | EPS Growth (1Y) |
|---|---|---|---|---|
| $1B | 7.1 | 0.69 | +817% | |
| $3B | 7.1 | - | +10833%Best | |
| $4B | 10.3 | - | +68% | |
| $2B | 6.2Lowest | 0.04Best | +40% | |
| $15B | 73.7 | - | -168% | |
| $50B | 99.6 | - | +183% | |
| $785M | 24.8 | 1.39 | -7% | |
| $4B | 48.1 | - | +194% |
Lower P/E can signal a discount or weaker growth expectations; PEG adds growth context.
ALKS Historical P/E Data (2006–2026)
Quarterly P/E ratios calculated from closing price and TTM EPS
| Quarter | Period End | Price | TTM EPS | P/E Ratio | vs Avg |
|---|---|---|---|---|---|
| FY2026 Q2 | - | $52.40 | $0.38 | 136.8x | +73% |
| FY2026 Q1 | - | $35.36 | $0.90 | 39.3x | -50% |
| FY2025 Q4 | Dec 31 2025 | $27.98 | $1.43 | 19.6x | -75% |
| FY2025 Q3 | - | $30.00 | $2.02 | 14.9x | -81% |
| FY2025 Q2 | Jun 30 2025 | $28.61 | $2.08 | 13.8x | -83% |
| FY2025 Q1 | Mar 31 2025 | $33.02 | $2.09 | 15.8x | -80% |
| FY2024 Q4 | - | $28.76 | $2.17 | 13.3x | -83% |
| FY2024 Q3 | Sep 30 2024 | $27.99 | $1.95 | 14.4x | -82% |
| FY2024 Q2 | Jun 30 2024 | $24.10 | $1.68 | 14.3x | -82% |
| FY2024 Q1 | Mar 31 2024 | $27.07 | $2.53 | 10.7x | -86% |
| FY2023 Q4 | Dec 31 2023 | $27.74 | $2.07 | 13.4x | -83% |
| FY2023 Q3 | Sep 30 2023 | $28.01 | $1.24 | 22.6x | -71% |
| FY2023 Q2 | Jun 30 2023 | $31.30 | $0.57 | 54.9x | -30% |
| FY2013 Q4 | - | $40.66 | $0.13 | 302.5x | +283% |
| FY2013 Q3 | Sep 30 2013 | $33.62 | $0.13 | 250.1x | +217% |
| FY2013 Q2 | Jun 30 2013 | $28.68 | $0.06 | 467.1x | +492% |
| FY2013 Q1 | Mar 31 2013 | $23.70 | $0.18 | 130.7x | +65% |
| FY2009 Q3 | Sep 30 2009 | $9.19 | $0.84 | 11.0x | -86% |
| FY2009 Q2 | - | $10.82 | $0.95 | 11.4x | -86% |
| FY2009 Q1 | - | $12.13 | $1.37 | 8.9x | -89% |
| FY2008 Q4 | Dec 31 2008 | $10.65 | $1.32 | 8.1x | -90% |
| FY2008 Q3 | - | $13.30 | $1.77 | 7.5x | -90% |
| FY2008 Q2 | Jun 30 2008 | $12.36 | $1.82 | 6.8x | -91% |
| FY2008 Q1 | Mar 31 2008 | $11.88 | $1.59 | 7.5x | -91% |
| FY2007 Q4 | Dec 31 2007 | $15.59 | $1.81 | 8.6x | -89% |
| FY2007 Q3 | Sep 30 2007 | $18.40 | $0.21 | 86.0x | +9% |
| FY2007 Q2 | Jun 30 2007 | $14.60 | $0.18 | 79.3x | +0% |
| FY2007 Q1 | Mar 31 2007 | $15.44 | $0.09 | 164.3x | +108% |
| FY2006 Q4 | Dec 31 2006 | $13.37 | $0.15 | 87.0x | +10% |
| FY2006 Q3 | Sep 30 2006 | $15.85 | $0.13 | 118.5x | +50% |
| FY2006 Q2 | Jun 30 2006 | $18.92 | $0.21 | 88.5x | +12% |
| FY2006 Q1 | Mar 31 2006 | $22.05 | $0.07 | 299.2x | +279% |
Average P/E for displayed period: 79.0x
ALKS Chart Terminal
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Intrinsic Valuation
DCF models, multiple analysis, and analyst estimates.
Historical Returns
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Peer Comparison
Compare growth, multiples, and margins vs sector.
ALKS — Frequently Asked Questions
Quick answers to the most common questions about buying ALKS stock.
What is ALKS's P/E ratio?
Alkermes plc (ALKS) trailing twelve-month P/E ratio is -9999.0x, based on TTM diluted EPS of $-0.00. The 5-year average P/E is 78.3x and the historical range spans 8.9x to 467.1x.
Is ALKS stock overvalued or undervalued?
ALKS trades at -9999.0x P/E, below its 5-year average of 78.3x. At the 0th percentile of its historical range (8.9x–467.1x), the stock is priced at a discount to its own history.
Is ALKS stock expensive?
No, ALKS is not expensive on a historical basis. The current P/E of -9999.0x is below the 5-year average of 78.3x and sits at the 0th percentile of its valuation range.
What is ALKS's historical P/E range?
Over the past 5 years, ALKS's P/E ratio has ranged from 8.9x to 467.1x, with a median of 15.8x and an average of 78.3x. The current P/E of -9999.0x places the stock at the 0th percentile of this range. Full historical data spans 2006–2026.
How does ALKS's P/E compare to the S&P 500?
ALKS trades at -9999.0x P/E versus the S&P 500 median of 21.8x. The 45967% discount to the market suggests lower growth expectations or perceived higher risk.
How does ALKS's valuation compare to Healthcare peers?
Alkermes plc P/E of -9999.0x compares to the Healthcare sector median of 24.6x. 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 ALKS's PEG ratio?
ALKS PEG ratio is N/A, based on a P/E of -9999.0x and EPS growth of -34.1%. PEG normalises P/E by growth and helps compare stocks with different earnings trajectories.
What is ALKS's earnings yield?
ALKS earnings yield is N/A, the inverse of its -9999.0x 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.