Alnylam Pharmaceuticals (ALNY) Market Cap 2004–2025

As of December 12, 2025, Alnylam Pharmaceuticals had a market cap of $52.520 billion, which decreased by 3.65% compared to the previous trading day. Market capitalization, often referred to as market cap, represents the total value of a company's outstanding shares on the stock market and is a common measure of its overall size and valuation.

Data updated: Dec 12, 2025, 4:00 PM ET
Alnylam Pharmaceuticals logo

Alnylam Pharmaceuticals Inc. (ALNY)

🌍 United States 📈 NASDAQ 🏭 Health Care 🏢 Biotechnology
Latest Market Cap
$52.520B ▼ 3.65%
Jan 1, 2025
$30.423B ▲ 72.63%
1 Year Ago
$31.657B ▲ 65.90%
All-Time High
$64.390B ▼ 18.43%


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Note: Each point on the chart represents the market capitalization at the end of the trading day.
Source: Data compiled from EDGAR filings, Bloomberg and Yahoo Finance.


📈 Alnylam Pharmaceuticals Market Cap History by Year and Month

Alnylam Pharmaceuticals Market Cap History by Year and Month
Year / MonthMarket Cap% Change
2025$52.520B▲ 72.63%
$52.520B▼ 11.89%
$59.610B▼ 1.06%
$60.250B▲ 0.80%
$59.770B▲ 2.12%
$58.530B▲ 13.85%
$51.410B▲ 20.91%
$42.520B▲ 7.08%
$39.710B▲ 15.71%
$34.320B▼ 2.47%
$35.190B▲ 10.18%
$31.940B▼ 9.03%
$35.110B▲ 15.41%
2024$30.423B▲ 26.66%
2023$24.020B▼ 17.85%
2022$29.238B▲ 43.46%
2021$20.380B▲ 34.68%

All market cap values reflect closing prices for the period shown.


📊 Alnylam Pharmaceuticals Market Cap and Other Industry Peers

Below are selected companies from the Biotechnology sector / subsector:

  1. $77.91B
  2. $52.52B
  3. $42.02B
  4. $32.35B
  5. $25.54B
  6. $21.27B
  7. $19.23B
  8. $18.73B
  9. $15.37B
  10. $15.24B
  11. $14.48B
  12. $13.09B
  13. $13.08B
  14. $11.51B
  15. $10.96B
  16. $10.24B
  17. $4.19B
  18. $3.54B
  19. $3.50B
  20. $3.19B

Data reflect the most recent market capitalization values available.

💡 What Is Market Capitalization and How Do We Calculate It?

For Alnylam Pharmaceuticals Inc. (ALNY), market capitalization represents the total market value of the company’s publicly traded shares. It helps investors understand Alnylam Pharmaceuticals’s size within the health care sector and compare it with other companies in the same industry.

In most cases, market capitalization is calculated by multiplying the current share price by the number of basic shares outstanding. Basic shares represent the actual number of common shares that currently exist, without including potential future shares from employee stock options, RSUs, warrants, or convertible securities. For example, if Alnylam Pharmaceuticals had one million basic shares and each traded at $50, its market capitalization would be $50 million.

Formula:
Market Cap = Share Price × Shares Outstanding

The value of Alnylam Pharmaceuticals’s market capitalization changes throughout the trading day because it mainly depends on the current share price. The number of shares outstanding typically remains stable unless the company issues new shares, buys back its own stock, or grants stock options to employees.

Based on the latest data, Alnylam Pharmaceuticals had a market capitalization of $52.520 billion, placing it in the large-cap category within the health care industry.

Disclaimer: Despite all efforts, there may still be minor inaccuracies present in the data.