analyst
PT
NASDAQ · PTGX
Protagonist Therapeutics, Inc.
Healthcare · Biotechnology
$143.40
Down-$4.38 (-2.96%)
Updated Sep 16, 2026, 12:50 PM
SID Score
5.4/10
Composite research score
Smart Money
56/100
Neutral
- Market cap
- 5.77B
- P/E ratio
- 128.14
- Dividend yield
- 0.00%
- 52-week range
- $90.58 – $160.81
- Volume
- 637.52K
- Avg. volume
- 1.18M
Price performance
PTGX price history
1M range · 20 trading sessions · Daily adjusted prices
PTGX closed at $143.40 after 20 trading sessions, down 8.86% for the selected period.
- Last close
- $143.40
- Period change
- -8.86%
- Period low
- $143.40
- Period high
- $157.34
Daily close
View OHLC price history
| Date | Open | High | Low | Close | Volume |
|---|---|---|---|---|---|
| Sep 15, 2026 | $147.48 | $147.99 | $142.00 | $143.40 | 637.52K |
| Sep 14, 2026 | $150.23 | $151.24 | $146.83 | $147.78 | 608.02K |
| Sep 11, 2026 | $147.18 | $150.48 | $145.82 | $148.18 | 478.04K |
| Sep 10, 2026 | $143.29 | $146.51 | $142.00 | $145.16 | 543.13K |
| Sep 9, 2026 | $146.05 | $151.185 | $144.46 | $145.09 | 530.53K |
| Sep 8, 2026 | $143.61 | $147.29 | $142.00 | $145.94 | 700.13K |
| Sep 4, 2026 | $146.47 | $147.99 | $144.01 | $145.72 | 501.31K |
| Sep 3, 2026 | $146.68 | $149.49 | $144.0001 | $148.80 | 354.19K |
| Sep 2, 2026 | $148.00 | $149.42 | $144.61 | $146.08 | 561.61K |
| Sep 1, 2026 | $147.75 | $150.34 | $144.725 | $146.49 | 534.14K |
| Aug 31, 2026 | $143.26 | $149.295 | $141.9479 | $147.75 | 567.4K |
| Aug 28, 2026 | $147.73 | $147.95 | $142.43 | $144.33 | 501.25K |
| Aug 27, 2026 | $150.35 | $151.68 | $147.11 | $149.50 | 381.59K |
| Aug 26, 2026 | $150.36 | $152.07 | $147.69 | $151.50 | 335.46K |
| Aug 25, 2026 | $155.84 | $157.98 | $150.09 | $150.59 | 664.53K |
| Aug 24, 2026 | $154.32 | $158.08 | $149.94 | $154.72 | 483.34K |
| Aug 21, 2026 | $152.10 | $154.95 | $150.82 | $154.32 | 402.54K |
| Aug 20, 2026 | $152.45 | $155.25 | $148.275 | $150.69 | 518.56K |
| Aug 19, 2026 | $160.81 | $160.81 | $154.22 | $154.94 | 786.05K |
| Aug 18, 2026 | $157.96 | $160.00 | $156.81 | $157.34 | 471.65K |
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