Protagonist Therapeutics

1D
1W
1M
3M
YTD
1Y
5Y
ALL

Why Robinhood?

Robinhood gives you the tools you need to put your money in motion. You can buy or sell PTGX and other ETFs, options, and stocks.

About PTGX

Protagonist Therapeutics, Inc. a clinical-stage biopharmaceutical company, which engages in discovering and developing peptide-based therapeutic drugs to address unmet medical needs. Its product pipeline includes PTG-300, PTG-200, and PN-943. 

CEO
Dinesh V. Patel
CEODinesh V. Patel
Employees
132
Employees132
Headquarters
Newark, California
HeadquartersNewark, California
Founded
2006
Founded2006
Employees
132
Employees132

PTGX Key Statistics

Market cap
8.96B
Market cap8.96B
Price-Earnings ratio
134.54
Price-Earnings ratio134.54
Dividend yield
—
Dividend yield—
Average volume
779.03K
Average volume779.03K
High today
$139.52
High today$139.52
Low today
$135.00
Low today$135.00
Open price
$136.89
Open price$136.89
Volume
401.64K
Volume401.64K
52 Week high
$160.81
52 Week high$160.81
52 Week low
$73.08
52 Week low$73.08

Stock Snapshot

Protagonist Therapeutics(PTGX) stock is priced at $138.28, giving the company a market capitalization of 8.96B. It carries a P/E multiple of 134.54.

As of 2026-10-23, Protagonist Therapeutics(PTGX) stock has fluctuated between $135.00 and $139.52. The current price stands at $138.28, placing the stock +2.4% above today's low and -0.9% off the high.

The Protagonist Therapeutics(PTGX)'s current trading volume is 401.64K, compared to an average daily volume of 779.03K.

During the past year, Protagonist Therapeutics(PTGX) stock moved between $73.08 at its lowest and $160.81 at its peak.

During the past year, Protagonist Therapeutics(PTGX) stock moved between $73.08 at its lowest and $160.81 at its peak.

PTGX News

Simply Wall St 9h
Protagonist Therapeutics Wins FDA Nod for MIMRYLO and a $275 Million Milestone - Simply Wall Street

...

Protagonist Therapeutics Wins FDA Nod for MIMRYLO and a $275 Million Milestone - Simply Wall Street

Analyst ratings

100%

of 15 ratings
Buy
100%
Hold
0%
Sell
0%

People also own

Based on the portfolios of people who own PTGX. This list is generated using Robinhood data, and it’s not a recommendation.

Similar Marketcap

This list is generated by looking at the six larger and six smaller companies by market cap in relation to this company.

Popular Stocks

This list is generated by looking at the top 100 stocks and ETFs most commonly held by Robinhood customers and showing a random subset

Newly Listed

This list is generated by showing companies that recently went public.

All investments involve risks, including the loss of principal. Securities trading offered through Robinhood Financial LLC, Member SIPC and a registered broker-dealer. Options are risky and aren’t suitable for all investors. To learn more about risks, read the Options Disclosure Document.