PB Ratio: 24.21

Basis: Latest stored market observation. Source: stored company filings and market data; unavailable inputs remain N/A.

Is the P/B ratio high or low?

The P/B ratio of 24.21 is 84% below its 5-year average of 147.66, near the low end of its 5-year range (20.05–1112.14).

As of Friday, August 28, 2026. 81.56% below its 12-month average of 131.32.

ALNY PB Ratio Metrics

P/B vs. its own history

At 24.21, P/B is above its 20-year median — higher than 84% of readings in its 20-year history.

Book Value Analysis

PB Ratio Formula & Definition

PB Ratio = Market Cap / Total Shareholders' Equity

The price-to-book ratio compares market capitalization to book value (shareholders' equity). Lower values can indicate a cheaper valuation relative to net assets.

Expanded definitions: Investopedia, Wikipedia, Corporate Finance Institute

PB Ratio FAQ

What is the P/B ratio for Alnylam Pharmaceuticals, Inc. (ALNY)?

The P/B ratio for ALNY stock is 24.21.

Is Alnylam Pharmaceuticals, Inc.'s P/B ratio high or low?

The P/B ratio of 24.21 is 84% below its 5-year average of 147.66, near the low end of its 5-year range (20.05–1112.14).

What is the TTM average P/B ratio for Alnylam Pharmaceuticals, Inc. (ALNY)?

The TTM average P/B ratio for ALNY stock is 131.32.

What is the 3Y average P/B ratio for Alnylam Pharmaceuticals, Inc. (ALNY)?

The 3Y average P/B ratio for ALNY stock is 293.13.

What is the 5Y average P/B ratio for Alnylam Pharmaceuticals, Inc. (ALNY)?

The 5Y average P/B ratio for ALNY stock is 147.66.

What is the 10Y average P/B ratio for Alnylam Pharmaceuticals, Inc. (ALNY)?

The 10Y average P/B ratio for ALNY stock is 14.86.

What is the 15Y average P/B ratio for Alnylam Pharmaceuticals, Inc. (ALNY)?

The 15Y average P/B ratio for ALNY stock is 9.97.

What is the 20Y average P/B ratio for Alnylam Pharmaceuticals, Inc. (ALNY)?

The 20Y average P/B ratio for ALNY stock is 6.64.

Showing the most recent 260 of 4,527 data points. The chart above shows the full history.

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