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Protagonist Therapeutics, Inc. Share Price

Protagonist Therapeutics, Inc. Share Price

NASDAQ: PTGX | Mid Cap
$144.22
-$5.40 (-3.61%) Last updated on 29 Aug, 2026 | 01:29 IST
  • Performance
  • Chart
  • Fundamentals
  • Quarterly P&L
  • Annual P&L
  • About
  • Price history
  • FAQs

Protagonist Therapeutics, Inc. Stock Performance

Open
$146.62
Prev. Close
$149.62
Circuit Range
N/A
Day Range
$142.47 - $146.81
Year Range
$54.63 - $159.99
Volume
30,618
Average Traded
$144.43

Protagonist Therapeutics, Inc. Share Price Today

As of 31 August 2026, Protagonist Therapeutics, Inc.'s share price is $144.22. The stock opened at $146.62, compared to its previous close of $149.62. During today's trading session, Protagonist Therapeutics, Inc.'s share price traded between $142.47 and $146.81, with an average price of $144.64. Over the past 52 weeks, the stock has recorded a high of $159.99 and a low of $54.63. In terms of performance, Protagonist Therapeutics, Inc.'s share price has risen by 56.57% over the last six months and is up 144.73% on a year-on-year basis.

Protagonist Therapeutics, Inc. Share Price Chart

$142.47$146.81
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Protagonist Therapeutics, Inc. Stock Fundamentals & Key Indicators

Market Cap
$9.17B
PE Ratio (TTM)
-70.35
Dividend Yield
N/A
EPS (TTM)
$-2.05
Revenue (TTM)
$46.02M
Return On Equity (TTM)
-21.17%
Profit Margin
-282.83%
Debt to Equity
0.07
Quarterly Earnings Growth YoY
-18.46%

Protagonist Therapeutics, Inc. Quarterly Profit & Loss

All figures in USD

ParticularsMar 2024Jun 2024Sep 2024Mar 2025Jun 2025Sep 2025
RevenueN/A$4.17M$4.67M$28.32M$5.55M$4.71M
Net Profit$207.34M-$30.62M-$33.21M-$11.65M-$34.77M-$39.34M
Net Profit MarginN/A-734.73%-710.37%-41.15%-626.96%-834.87%
Income ChangeN/A-114.77%-8.47%64.91%-198.34%-13.14%

Protagonist Therapeutics, Inc. Annual Profit & Loss

All figures in USD

Particulars20212022202320242025
RevenueN/AN/A$60.00M$434.43M$46.02M
Net Profit-$125.55M-$127.39M-$78.95M$275.19M-$130.15M
Net Profit MarginN/AN/A-131.59%63.34%-282.83%
Income ChangeN/A-1.47%38.02%448.54%-147.29%

About Protagonist Therapeutics, Inc.

Protagonist Therapeutics, Inc., a biopharmaceutical company, develops peptide therapeutics for hematology and blood disorders, and inflammatory and immunomodulatory diseases. It is developing Rusfertide, an injectable mimetic of hepcidin that is in phase 3 clinical trials for the treatment of polycythemia vera; Icotrokinra, an orally delivered investigational drug which is in phase 3 clinical trials indicated to block biological pathways targeted by marketed injectable antibody drugs; and PN-943, an orally delivered, gut-restricted alpha 4 beta 7 specific integrin antagonist completed a phase 2 clinical trials in patients with moderate to severe ulcerative colitis. The company also develops IL-17 oral peptide antagonist PN-88,1 an oral metabolic/obesity peptide program, and an oral hepcidin mimetic/ferroportin blocker that is in pre-clinical stage. Protagonist Therapeutics, Inc. was incorporated in 2006 and is headquartered in Newark, California.

Protagonist Therapeutics, Inc. Historical Returns

MonthOpenCloseChange %
Aug 2026
$135.91
$149.56
+9.32%
Jul 2026
$123.85
$136.81
+11.83%
Jun 2026
$97.85
$122.34
+22.92%
May 2026
$99.13
$99.53
+0.61%
Apr 2026
$106.41
$98.93
-6.26%
Mar 2026
$91.34
$105.54
+14.57%
Feb 2026
$81.56
$92.11
+12.61%
Jan 2026
$86.93
$81.80
-6.29%
Dec 2025
$89.25
$87.30
-2.90%
Nov 2025
$79.14
$89.90
+14.33%
Oct 2025
$65.98
$78.63
+18.37%
Sep 2025
$59.18
$66.43
+12.73%

PTGX Share Price FAQs

What is Protagonist Therapeutics, Inc. share price today?

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Protagonist Therapeutics, Inc. share price today is $144.22 as on August 29, 2026 at 1:29 am IST.

What is the 52 week high and 52 week low of Protagonist Therapeutics, Inc. stock?

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The 52 week high of Protagonist Therapeutics, Inc. stock is $159.99, while the 52 week low is $54.63 as of 29 Aug '26.

What is PTGX's market capitalisation today?

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PTGX market capitalisation is $9.17B as of August 31, 2026, at 4:13 pm IST.

What is PTGX's net income for the last quarter?

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PTGX's net income for the last quarter is -0.04B USD.

What is the 5 year returns of PTGX?

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The 5 year returns of PTGX is 197.36% as on 29 Aug '26.

What is the high & low stock price of PTGX today?

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PTGX stock price hit a high of $146.81 and low of $142.47 as of 29 Aug '26.

Can I buy PTGX shares in India?

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Yes. You can buy PTGX in India by opening an international trading account.