Alnylam Pharmaceuticals, Inc. (ALNY) Stock Price History
Historical prices from 2011 to 2026
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ALNY Historical Performance
Short-Term Returns
ALNY Stock Price Trajectory (2011–2026)
As of May 8, 2026, Alnylam Pharmaceuticals, Inc. (ALNY) trades at $295.91, representing a +7.0% return over the past year. The stock has delivered a +125.4% total return over five years (+17.6% CAGR), reflecting significant long-term value creation.
The stock reached its all-time high of $495.55 on October 20, 2025. From this peak, ALNY has corrected -40.3%, currently trading 25% below its 200-day moving average, suggesting potential weakness.
When compared to Healthcare sector peers IONS (+129.9% 1Y), ARWR (+496.9% 1Y), and NTLA (+88.1% 1Y), ALNY has underperformed the peer group average. Compare ALNY vs IONS →
ALNY Historical Price Data (2025–2026)
Showing 30 of 3,650 recordsLoading full history…
| Date | Open | High | Low | Close | Volume | Change % |
|---|---|---|---|---|---|---|
| 2026-05-07 | 300.55 | 303.46 | 293.78 | 295.91 | 1.11M | -2.34% |
| 2026-05-06 | 300.66 | 306.00 | 298.96 | 303.00 | 787K | +0.63% |
| 2026-05-05 | 297.81 | 302.67 | 295.02 | 301.11 | 602K | +1.07% |
| 2026-05-04 | 298.00 | 300.49 | 288.06 | 297.93 | 1.59M | +0.61% |
| 2026-05-01 | 307.46 | 311.88 | 295.79 | 296.11 | 947K | -4.32% |
| 2026-04-30 | 307.48 | 317.55 | 287.00 | 309.49 | 2.19M | +2.76% |
| 2026-04-29 | 300.51 | 304.22 | 294.06 | 301.19 | 1.57M | -0.30% |
| 2026-04-28 | 308.97 | 314.17 | 301.87 | 302.11 | 980K | -2.07% |
| 2026-04-27 | 303.87 | 314.52 | 303.70 | 308.51 | 1.06M | +0.97% |
| 2026-04-24 | 309.91 | 311.10 | 302.90 | 305.54 | 817K | -2.63% |
| 2026-04-23 | 313.59 | 315.83 | 310.79 | 313.79 | 574K | +1.03% |
| 2026-04-22 | 308.46 | 312.69 | 307.85 | 310.58 | 938K | +0.70% |
| 2026-04-21 | 307.32 | 310.50 | 301.75 | 308.43 | 1.37M | -0.81% |
| 2026-04-20 | 306.56 | 312.25 | 305.00 | 310.94 | 911K | +0.41% |
| 2026-04-17 | 326.09 | 326.53 | 306.04 | 309.66 | 1.43M | -3.27% |
| 2026-04-16 | 332.88 | 333.39 | 318.94 | 320.13 | 953K | -3.98% |
| 2026-04-15 | 342.00 | 342.23 | 331.02 | 333.39 | 699K | -1.77% |
| 2026-04-14 | 330.81 | 343.36 | 330.81 | 339.41 | 1.12M | +1.92% |
| 2026-04-13 | 320.61 | 333.70 | 319.00 | 333.00 | 932K | +3.37% |
| 2026-04-10 | 323.49 | 328.89 | 317.53 | 322.14 | 691K | +0.27% |
| 2026-04-09 | 325.67 | 326.90 | 318.77 | 321.28 | 1.02M | -1.82% |
| 2026-04-08 | 327.49 | 330.30 | 324.44 | 327.25 | 954K | +2.42% |
| 2026-04-07 | 319.48 | 322.35 | 313.54 | 319.52 | 1.29M | -3.28% |
| 2026-04-06 | 322.04 | 335.58 | 320.32 | 330.34 | 1.20M | +3.60% |
| 2026-04-02 | 325.69 | 325.69 | 315.89 | 318.85 | 857K | -3.01% |
| 2026-04-01 | 331.81 | 335.48 | 327.59 | 328.73 | 647K | -0.65% |
| 2026-03-31 | 319.06 | 332.45 | 319.03 | 330.89 | 1.30M | +4.68% |
| 2026-03-30 | 319.32 | 321.76 | 314.20 | 316.09 | 1.20M | -0.40% |
| 2026-03-27 | 327.10 | 329.69 | 316.85 | 317.36 | 807K | -3.29% |
| 2026-03-26 | 328.90 | 332.81 | 327.69 | 328.16 | 1.03M | -0.16% |
Full ALNY Stock Analysis
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Start ComparisonALNY — Frequently Asked Questions
Quick answers to the most common questions about buying ALNY stock.
How has ALNY stock performed recently?
ALNY returned +7.0% over the past year, beating its 5-year annualized CAGR of +17.6%. The stock trades below its 200-day moving average, confirming the uptrend.
What is ALNY's all-time high price?
Alnylam Pharmaceuticals, Inc. reached $495.55 on 2025-10-20. The 52-week high is $495.55. Current 1-year return of +7.0% places the stock closer to historical peaks.
Where can I download ALNY historical price data?
This page provides ALNY daily OHLCV data with 50-day MA, 200-day MA, and RSI indicators. Data spans 2011-2026, downloadable in CSV format.