PB Ratio: 10.60

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 10.60 is 146% above its estimated 5-year average of 4.32, around the middle of its estimated 5-year range (1.14–15.15).

As of 2026-10-06T21:38:11.674Z. 2.11% above its estimated 12-month average of 10.38.

PTGX PB Ratio Metrics

P/B vs. estimated history

At 10.60, P/B is above its estimated 10-year median — higher than 95% of readings in its estimated 10-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 Protagonist Therapeutics, Inc. (PTGX)?

The P/B ratio for PTGX stock is 10.60.

Is Protagonist Therapeutics, Inc.'s P/B ratio high or low?

The P/B ratio of 10.60 is 146% above its estimated 5-year average of 4.32, around the middle of its estimated 5-year range (1.14–15.15).

What is the estimated TTM average P/B ratio for Protagonist Therapeutics, Inc. (PTGX)?

The estimated TTM average P/B ratio for PTGX stock is 10.38.

What is the estimated 3Y average P/B ratio for Protagonist Therapeutics, Inc. (PTGX)?

The estimated 3Y average P/B ratio for PTGX stock is 6.34.

What is the estimated 5Y average P/B ratio for Protagonist Therapeutics, Inc. (PTGX)?

The estimated 5Y average P/B ratio for PTGX stock is 4.32.

What is the estimated 10Y average P/B ratio for Protagonist Therapeutics, Inc. (PTGX)?

The estimated 10Y average P/B ratio for PTGX stock is 3.94.

Showing the most recent 260 of 2,273 data points. The chart above shows the full history.

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