Protagonist Therapeutics, Inc. (PTGX)

NASDAQ

$138.22

$+0.22

(+0.16%)

After-Hours

Protagonist Therapeutics, Inc. (PTGX) Live Price Chart

Last updated: ⁦2026-10-21 22:42:20⁩. Prices reflect the latest after-hours trading data. Stock price data is sourced from Massive.

Summary

Protagonist Therapeutics, Inc. (PTGX) operates in the PHARMACEUTICAL PREPARATIONS sector and is listed on NASDAQ. The stock is currently priced at $138.22, with a market capitalization of $8.70B and a P/E ratio of 107.70. Over the past 52 weeks, its price has ranged from $73.08 to $160.81. This page covers its latest market performance, valuation, price trends and company information.

Key Market Data

Market Cap	$8.70B
Open	$139.71
Day's High	$160.81
Day's Low	$4.47
Previous Close	$137.99
Volume	561.07K
Average Volume	636.46K
P/E Ratio	107.70
52-Week High	$160.81
52-Week Low	$73.08
Dividend Yield	--
Earnings Date	--

Protagonist Therapeutics, Inc. (PTGX) After-Hours Stock Price

Protagonist Therapeutics, Inc. (PTGX) is trading at $138.82 in after-hours trading as of 2026-10-21 22:39:00, up 0.60% ($0.83) from the regular-session close of $137.99.

After-hours trading shows how investors are pricing PTGX after the regular session closes. The current after-hours price is above the regular-session close, indicating positive after-hours sentiment.

Protagonist Therapeutics, Inc. (PTGX) 7-Day Stock Price Change

Over the past seven days, Protagonist Therapeutics, Inc. (PTGX) moved from $144.88 to $138.22, representing a decline of 4.60% ($6.66).

The stock traded between $126.39 and $152.19 during the period. The latest price is near the middle of the 7-day range, indicating moderate downward.

The average daily volume was 804.67 thousand shares, down versus the previous seven-day period, indicating lower trading activity.

PTGX 52-Week Price Position

Position in Range: 74.2%

52W Low$73.08

52W High$160.81

PTGX is currently trading at $138.22, placing it 74.2% of the way from its 52-week low of $73.08 to its 52-week high of $160.81. This percentage reflects the stock's relative position within its 52-week trading range, not its valuation or future performance.

What is Protagonist Therapeutics, Inc. (PTGX)?

Protagonist Therapeutics Inc is a biopharmaceutical company engaged in the discovery and development of peptide-based therapeutics using its proprietary technology platform. The company focuses on three therapeutic areas: inflammation and immunology, hematology, and metabolic diseases. Its pipeline includes clinical-stage and preclinical candidates such as rusfertide for polycythemia vera, icotrokinra for inflammatory diseases, and other programs targeting IL-17, obesity, and iron metabolism disorders, developed through internal research and strategic collaborations.

Protagonist Therapeutics, Inc. Information

Industry	PHARMACEUTICAL PREPARATIONS
Employees	141
Exchange	NASDAQ
Company Website	https://www.protagonist-inc.com

How to Buy Protagonist Therapeutics, Inc. (PTGX) Stock on MEXC

Eligible investors can buy real shares of Protagonist Therapeutics, Inc. (PTGX) through MEXC RealStocks. Follow these three steps to open a RealStocks account, transfer USDT, and place a US stock order.

Step 1: Open and Verify Your RealStocks Account

Log in to the MEXC App, go to Trade → RealStocks, and select Open Account. Complete the required account-opening and identity verification process with MEXC's partner licensed broker.

Step 2: Transfer USDT to Your RealStocks Account

Go to Wallets → RealStocks and transfer USDT from your Spot Account to your RealStocks Account. RealStocks are quoted in USD, while account funding can be completed using USDT.

Step 3: Search for PTGX and Place Your Order

Open the RealStocks trading page and search for PTGX. Select a market or limit order, enter the price and quantity as required, review the order details, and submit your order. Once filled, the corresponding real shares will be held in your RealStocks Account.

Frequently Asked Questions (FAQ)

1.What is Protagonist Therapeutics, Inc. (PTGX) stock price today?

Protagonist Therapeutics, Inc. (PTGX) is currently trading at $ 138.22, up 0.16% ($0.22) from the previous close of $ 137.99. Intraday prices update in real time during regular trading hours.

2.Is PTGX stock going up or down today?

As of 2026-10-21 22:39:00, PTGX is trading at $ 138.22, up 0.16% ($0.22) from its previous close of $ 137.99. The stock has traded between $ 4.47 and $ 160.81 during today’s regular session. Past price movements do not guarantee future results.

3.What is PTGX pre-market price?

As of 2026-10-21 22:39:00, PTGX is trading at $ 137.85 in pre-market trading, down 0.11% ($0.15) from the previous close of $ 137.99. Pre-market prices reflect trading activity before the regular session opens and may experience lower liquidity and higher volatility.

4.What is PTGX after-hours price?

As of 2026-10-21 22:39:00, PTGX is trading at $ 138.82 in after-hours trading, up 0.60% ($0.83) from the regular-session close of $ 137.99. After-hours prices may differ from the regular session’s opening price due to lower liquidity and wider bid-ask spreads.

5.Is PTGX stock trading now?

PTGX trades on the NASDAQ exchange during regular hours, Monday through Friday, 9:30 AM to 4:00 PM ET, excluding public holidays. Pre-market and after-hours trading are also available through select brokers outside these hours.

6.Where does PTGX sit relative to its 52-week high and low?

Over the past 52 weeks, PTGX has traded between a low of $ 73.08 and a high of $ 160.81. At $ 138.22, the stock is positioned 74.2% of the way from its 52-week low to its 52-week high, providing context for its current price within the one-year trading range.

7.What sector is Protagonist Therapeutics, Inc. in?

Protagonist Therapeutics, Inc. (PTGX) operates in the PHARMACEUTICAL PREPARATIONS sector. Sector classification helps investors compare it with companies exposed to similar market trends and competitive conditions.

8.What is Protagonist Therapeutics, Inc.'s market capitalization and where is it listed?

Protagonist Therapeutics, Inc. is listed on the NASDAQ exchange with a market capitalization of $ 8.70B. Market cap reflects the total market value of all outstanding shares and is commonly used to classify stocks by size.

9.How is PTGX valued in terms of P/E ratio and EPS?

PTGX trades at a P/E ratio of 107.70, based on trailing-twelve-month EPS of $ 1.28. P/E ratio compares the stock price to earnings per share and is a common starting point for assessing valuation relative to peers.

10.Does Protagonist Therapeutics, Inc. pay a dividend?

Protagonist Therapeutics, Inc. pays an indicated annual cash dividend of $ 0.00 per share, with a current dividend yield of 0.00% based on the latest share price. Dividend policies are subject to change at the board's discretion.