PTGX Protagonist Therapeutics, Inc.
NASDAQActiveCommon stock
PTGX is the ticker symbol of Protagonist Therapeutics, Inc., which is listed on NASDAQ.
PTGX at a glance
- Symbol
- PTGX
- Company / issuer
- Protagonist Therapeutics, Inc.
- Security type
- Common stock
- Exchange
- NASDAQ
- Status
- Actively traded
- Seen in listing files
- Aug 2018 – present
- Sector
- Health Care
- Industry
- Biotechnology: Pharmaceutical Preparations
- Country
- United States
- IPO year
- 2016
- Market cap
- $8.9 billion (Sep 2026)
Protagonist Therapeutics, Inc. company profile
- Industry (SIC)
- Pharmaceutical Preparations
- Headquarters
- Newark, CA
- Incorporated in
- DE
- Fiscal year end
- December 31
- SEC filer category
- Large accelerated filer
- Latest annual report
- 10-K filed 2026-02-25
- Latest interim report
- 10-Q filed 2026-08-05
- SEC CIK
- 1377121
Former company names
- Protagonist Inc (until 2006)
Source: SEC EDGAR filer data.
PTGX price chart
Interactive chart provided by TradingView (loads third-party scripts).
Frequently asked questions
What company has the ticker symbol PTGX?
PTGX is the ticker symbol of Protagonist Therapeutics, Inc on NASDAQ.
Is PTGX still trading?
Yes. PTGX appears in the current NASDAQ listings as of Sep 2026.
Which exchange is PTGX listed on?
PTGX is listed on NASDAQ.
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