Alnylam Pharmaceuticals, Inc. (ALNY) Stock Price History
Historical prices from 2011 to 2026
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Historical Performance
Short-Term Returns
ALNY Stock Price Trajectory (2011–2026)
As of March 2, 2026, Alnylam Pharmaceuticals, Inc. (ALNY) trades at $332.92, representing a +34.9% return over the past year. The stock has delivered a +17.5% return over five years, 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 -32.8%, currently trading 15% below its 200-day moving average, suggesting potential weakness.
When compared to Healthcare sector peers IONS (+144.5% 1Y), ARWR (+234.6% 1Y), and CRSP (+36.9% 1Y), ALNY has underperformed the peer group average. Compare ALNY vs IONS →
Historical Price Data
Showing 30 of 3,650 records| Date | Open | High | Low | Close | Volume | Change % |
|---|---|---|---|---|---|---|
| 2026-02-27 | 331.24 | 334.84 | 328.39 | 332.92 | 332 | +0.51% |
| 2026-02-26 | 328.67 | 333.47 | 322.30 | 331.24 | 331 | +1.19% |
| 2026-02-25 | 332.85 | 334.42 | 325.04 | 327.36 | 327 | -1.65% |
| 2026-02-24 | 330.07 | 333.06 | 324.48 | 332.85 | 332 | +1.06% |
| 2026-02-23 | 335.73 | 341.38 | 326.76 | 329.35 | 329 | -2.03% |
| 2026-02-20 | 336.58 | 345.89 | 335.88 | 336.19 | 336 | -0.94% |
| 2026-02-19 | 332.24 | 339.61 | 326.33 | 339.37 | 1.08M | +2.01% |
| 2026-02-18 | 330.30 | 335.80 | 324.53 | 332.68 | 1.14M | +4.17% |
| 2026-02-17 | 316.80 | 319.37 | 316.80 | 319.37 | 27K | +1.58% |
| 2026-02-13 | 302.55 | 318.44 | 302.55 | 314.40 | 1.42M | +1.92% |
| 2026-02-12 | 314.42 | 315.51 | 298.00 | 308.48 | 2.90M | -4.28% |
| 2026-02-11 | 322.14 | 325.04 | 317.80 | 322.28 | 1.58M | -0.22% |
| 2026-02-10 | 322.68 | 325.98 | 317.89 | 322.98 | 1.87M | +0.93% |
| 2026-02-09 | 325.49 | 329.92 | 319.26 | 320.00 | 1.39M | -2.49% |
| 2026-02-06 | 331.61 | 340.07 | 326.51 | 328.16 | 1.48M | -0.93% |
| 2026-02-05 | 350.50 | 350.50 | 327.27 | 331.24 | 2.62M | -5.89% |
| 2026-02-04 | 354.00 | 355.49 | 347.08 | 351.96 | 1.78M | +0.05% |
| 2026-02-03 | 338.49 | 352.82 | 337.59 | 351.80 | 2.15M | +3.74% |
| 2026-02-02 | 337.42 | 342.33 | 333.00 | 339.11 | 1.91M | +0.31% |
| 2026-01-30 | 343.10 | 346.50 | 336.39 | 338.06 | 1.65M | -2.52% |
| 2026-01-29 | 349.37 | 350.34 | 345.01 | 346.79 | 1.68M | -0.80% |
| 2026-01-28 | 353.66 | 356.84 | 348.00 | 349.58 | 1.10M | -1.46% |
| 2026-01-27 | 361.55 | 368.07 | 354.69 | 354.75 | 987K | -1.83% |
| 2026-01-26 | 357.98 | 364.07 | 352.50 | 361.35 | 936K | +0.94% |
| 2026-01-24 | 368.20 | 371.33 | 356.79 | 357.98 | 1.61M | 0.00% |
| 2026-01-23 | 368.20 | 371.33 | 356.72 | 357.98 | 1.64M | -3.25% |
| 2026-01-22 | 365.50 | 376.87 | 363.36 | 370.00 | 1.88M | +1.24% |
| 2026-01-21 | 353.01 | 366.00 | 351.55 | 365.46 | 1.52M | +2.79% |
| 2026-01-20 | 350.70 | 355.74 | 347.77 | 355.53 | 1.72M | -1.04% |
| 2026-01-16 | 362.29 | 367.20 | 355.46 | 359.27 | 1.53M | +0.00% |
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Start ComparisonFrequently Asked Questions
How has ALNY stock performed recently?
ALNY returned +34.9% over the past year, beating its 5-year annualized CAGR of +17.5%. 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 +34.9% 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.