PE Ratio: 134.17

Basis: FMP quote price / unrounded diluted EPS from four consecutive issuer fiscal quarters. Source: stored company filings and market data; unavailable inputs remain N/A.

Is the P/E ratio high or low?

The P/E ratio of 134.17 is 120% above its 2-year average of 61.10, near the high end of its 2-year range (8.35–153.79).

As of 2026-10-06T22:47:58.086Z. 3.55% below its 12-month average of 139.11.

PE Ratio (134.17) = Close Price ($138.69) / Diluted TTM EPS ($1.03)

PTGX PE Ratio Metrics

P/E vs. its own history

At 134.2, P/E is above its 2-year median — higher than 81% of readings in its 2-year history.

P/E Comparison

PE Ratio Formula & Definition

PE Ratio = Share Price / Diluted EPS (TTM)

The price-to-earnings ratio measures how much investors pay for each dollar of trailing earnings. A lower PE can indicate a cheaper valuation; a higher PE implies higher growth expectations.

Expanded definitions: Investopedia, Wikipedia, Corporate Finance Institute

PE Ratio FAQ

What is the P/E ratio for Protagonist Therapeutics, Inc. (PTGX)?

The P/E ratio for PTGX stock is 134.17.

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

The P/E ratio of 134.17 is 120% above its 2-year average of 61.10, near the high end of its 2-year range (8.35–153.79).

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

The TTM average P/E ratio for PTGX stock is 139.11.

Showing the most recent 260 of 493 data points. The chart above shows the full history.

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