PB Ratio: 16.63

Basis: FMP quote market capitalization / book value attributable to common shareholders (matching reported total stockholders equity minus preferred stock). 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 16.63 is 15% above its estimated 5-year average of 14.44, around the middle of its estimated 5-year range (6.33–28.96).

As of 2026-10-06T22:42:01.820Z. 24.61% below its estimated 12-month average of 22.06.

IONS PB Ratio Metrics

P/B vs. estimated history

At 16.63, P/B is near its estimated 20-year median — higher than 62% of readings in its estimated 20-year history.

Historical values estimate market capitalization from statement-period weighted shares. Comparisons with the current quote-based value are approximate. Only filing versions delivered by FMP are available for the historical calculation.

Book Value Analysis

PB Ratio Formula & Definition

PB Ratio = Market Cap / (Total Shareholders' Equity − Preferred Stock)

The price-to-book ratio compares market capitalization to book value attributable to common shareholders (total equity minus preferred stock). 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 Ionis Pharmaceuticals, Inc. (IONS)?

The P/B ratio for IONS stock is 16.63.

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

The P/B ratio of 16.63 is 15% above its estimated 5-year average of 14.44, around the middle of its estimated 5-year range (6.33–28.96).

What is the estimated TTM average P/B ratio for Ionis Pharmaceuticals, Inc. (IONS)?

The estimated TTM average P/B ratio for IONS stock is 22.06.

What is the estimated 3Y average P/B ratio for Ionis Pharmaceuticals, Inc. (IONS)?

The estimated 3Y average P/B ratio for IONS stock is 17.78.

What is the estimated 5Y average P/B ratio for Ionis Pharmaceuticals, Inc. (IONS)?

The estimated 5Y average P/B ratio for IONS stock is 14.44.

What is the estimated 10Y average P/B ratio for Ionis Pharmaceuticals, Inc. (IONS)?

The estimated 10Y average P/B ratio for IONS stock is 14.00.

What is the estimated 15Y average P/B ratio for Ionis Pharmaceuticals, Inc. (IONS)?

The estimated 15Y average P/B ratio for IONS stock is 14.38.

What is the estimated 20Y average P/B ratio for Ionis Pharmaceuticals, Inc. (IONS)?

The estimated 20Y average P/B ratio for IONS stock is 13.78.

Showing the most recent 260 of 5,030 data points. The chart above shows the full history.

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