PTGX · Protagonist Therapeutics, Inc

Track PTGX — free

$155.10 +3.68 (+2.43%) At close · Aug 14

Market Cap

$10.04B

64.71M

Options Chain

Underlying $155.10 · at close Aug 14, 2026 Options Calculator

Positioning

Aug 21, 2026 · 4 days to expiry · 60 contracts · mixed snapshot sessions · Jun 18, 2026–Aug 14, 2026; 28 unknown

Put / call OI

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dated and unknown snapshot sessions

Open interest

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dated and unknown snapshot sessions

Volume

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dated and unknown snapshot sessions

Chain

Click any strike for greeks, breakeven and the calculator

Expiry

Aug 21 4d Sep 18 32d Oct 16 60d Jan 15 151d

Calls						Puts
OI	Vol	IV	Δ	Last	Strike	Last	Δ	IV	Vol	OI
0	—	—	—	—		—	—	—	—	0
Call · $55 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $55 Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	365%	0.995	—		—	—	—	—	0
Call · $60 In the money Snapshot session Unknown Last — Breakeven — Implied vol 365% Delta 0.995 ≈99% ITM Gamma 0 Theta -0.11 Vega 0.002 Open interest 0 Model this call Put · $60 Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	335.5%	0.994	—		—	-0.018	426.2%	—	0
Call · $65 In the money Snapshot session Unknown Last — Breakeven — Implied vol 335.5% Delta 0.994 ≈99% ITM Gamma 0 Theta -0.108 Vega 0.002 Open interest 0 Model this call Put · $65 Snapshot session Unknown Last — Breakeven — Implied vol 426.2% Delta -0.018 ≈2% ITM Gamma 0.001 Theta -0.362 Vega 0.011 Open interest 0 Model this put
0	—	308.4%	0.994	—		—	-0.016	369.8%	—	0
Call · $70 In the money Snapshot session Unknown Last — Breakeven — Implied vol 308.4% Delta 0.994 ≈99% ITM Gamma 0 Theta -0.106 Vega 0.003 Open interest 0 Model this call Put · $70 Snapshot session Unknown Last — Breakeven — Implied vol 369.8% Delta -0.016 ≈2% ITM Gamma 0.001 Theta -0.278 Vega 0.006 Open interest 0 Model this put
0	—	283.2%	0.994	—		—	-0.017	341.4%	—	0
Call · $75 In the money Snapshot session Unknown Last — Breakeven — Implied vol 283.2% Delta 0.994 ≈99% ITM Gamma 0 Theta -0.104 Vega 0.003 Open interest 0 Model this call Put · $75 Snapshot session Unknown Last — Breakeven — Implied vol 341.4% Delta -0.017 ≈2% ITM Gamma 0.001 Theta -0.276 Vega 0.006 Open interest 0 Model this put
0	—	259.6%	0.993	—		—	-0.019	315%	—	0
Call · $80 In the money Snapshot session Unknown Last — Breakeven — Implied vol 259.6% Delta 0.993 ≈99% ITM Gamma 0 Theta -0.103 Vega 0.003 Open interest 0 Model this call Put · $80 Snapshot session Unknown Last — Breakeven — Implied vol 315% Delta -0.019 ≈2% ITM Gamma 0.001 Theta -0.274 Vega 0.006 Open interest 0 Model this put
0	—	237.6%	0.993	—		$1.95	-0.02	290.2%	1	1
Call · $85 In the money Snapshot session Unknown Last — Breakeven — Implied vol 237.6% Delta 0.993 ≈99% ITM Gamma 0 Theta -0.101 Vega 0.003 Open interest 0 Model this call Put · $85 Snapshot session Jun 18, 2026 Last $1.95 Breakeven $83.05 Implied vol 290.2% Delta -0.02 ≈2% ITM Gamma 0.001 Theta -0.272 Vega 0.006 Open interest 1 Model this put
0	—	216.9%	0.992	—		$2.30	-0.022	266.4%	1	1
Call · $90 In the money Snapshot session Unknown Last — Breakeven — Implied vol 216.9% Delta 0.992 ≈99% ITM Gamma 0.001 Theta -0.099 Vega 0.003 Open interest 0 Model this call Put · $90 Snapshot session Jun 24, 2026 Last $2.30 Breakeven $87.70 Implied vol 266.4% Delta -0.022 ≈2% ITM Gamma 0.001 Theta -0.269 Vega 0.013 Open interest 1 Model this put
0	—	197.3%	0.991	—		—	-0.028	249.5%	—	0
Call · $95 In the money Snapshot session Unknown Last — Breakeven — Implied vol 197.3% Delta 0.991 ≈99% ITM Gamma 0.001 Theta -0.097 Vega 0.003 Open interest 0 Model this call Put · $95 Snapshot session Unknown Last — Breakeven — Implied vol 249.5% Delta -0.028 ≈3% ITM Gamma 0.001 Theta -0.304 Vega 0.014 Open interest 0 Model this put
23	5	178.8%	0.991	$52.00		$5.10	-0.026	219.3%	1	2
Call · $100 In the money Snapshot session Aug 12, 2026 Last $52.00 Breakeven $152.00 Implied vol 178.8% Delta 0.991 ≈99% ITM Gamma 0.001 Theta -0.095 Vega 0.007 Open interest 23 Model this call Put · $100 Snapshot session Jun 18, 2026 Last $5.10 Breakeven $94.90 Implied vol 219.3% Delta -0.026 ≈3% ITM Gamma 0.002 Theta -0.255 Vega 0.014 Open interest 2 Model this put
0	—	159.9%	0.99	—		$5.15	-0.038	211.4%	5	6
Call · $105 In the money Snapshot session Unknown Last — Breakeven — Implied vol 159.9% Delta 0.99 ≈99% ITM Gamma 0.001 Theta -0.092 Vega 0.007 Open interest 0 Model this call Put · $105 Snapshot session Jun 26, 2026 Last $5.15 Breakeven $99.85 Implied vol 211.4% Delta -0.038 ≈4% ITM Gamma 0.002 Theta -0.331 Vega 0.014 Open interest 6 Model this put
0	—	141.8%	0.989	—		$2.45	-0.096	269%	1	5
Call · $110 In the money Snapshot session Unknown Last — Breakeven — Implied vol 141.8% Delta 0.989 ≈99% ITM Gamma 0.001 Theta -0.089 Vega 0.007 Open interest 0 Model this call Put · $110 Snapshot session Aug 10, 2026 Last $2.45 Breakeven $107.55 Implied vol 269% Delta -0.096 ≈10% ITM Gamma 0.004 Theta -0.884 Vega 0.025 Open interest 5 Model this put
0	—	—	—	—		$2.55	-0.036	157%	1	3
Call · $115 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $115 Snapshot session Aug 10, 2026 Last $2.55 Breakeven $112.45 Implied vol 157% Delta -0.036 ≈4% ITM Gamma 0.003 Theta -0.234 Vega 0.015 Open interest 3 Model this put
16	35	—	—	$17.40		$3.00	-0.04	138.1%	2	14
Call · $120 In the money Snapshot session Jul 6, 2026 Last $17.40 Breakeven $137.40 Implied vol — Delta — Gamma — Theta — Vega — Open interest 16 Model this call Put · $120 Snapshot session Jul 30, 2026 Last $3.00 Breakeven $117.00 Implied vol 138.1% Delta -0.04 ≈4% ITM Gamma 0.004 Theta -0.227 Vega 0.015 Open interest 14 Model this put
58	3	83.7%	0.992	$16.10		$0.95	-0.05	123.1%	51	118
Call · $125 In the money Snapshot session Jul 30, 2026 Last $16.10 Breakeven $141.10 Implied vol 83.7% Delta 0.992 ≈99% ITM Gamma 0.002 Theta -0.049 Vega 0.003 Open interest 58 Model this call Put · $125 Snapshot session Aug 6, 2026 Last $0.95 Breakeven $124.05 Implied vol 123.1% Delta -0.05 ≈5% ITM Gamma 0.005 Theta -0.24 Vega 0.016 Open interest 118 Model this put
25	2	69.9%	0.99	$13.44		$3.20	-0.068	111.9%	2	42
Call · $130 In the money Snapshot session Jul 27, 2026 Last $13.44 Breakeven $143.44 Implied vol 69.9% Delta 0.99 ≈99% ITM Gamma 0.002 Theta -0.047 Vega 0.003 Open interest 25 Model this call Put · $130 Snapshot session Aug 6, 2026 Last $3.20 Breakeven $126.80 Implied vol 111.9% Delta -0.068 ≈7% ITM Gamma 0.007 Theta -0.281 Vega 0.028 Open interest 42 Model this put
62	5	0.1%	1	$20.20		$1.93	-0.171	142.6%	1	292
Call · $135 In the money Snapshot session Aug 14, 2026 Last $20.20 Breakeven $155.20 Implied vol 0.1% Delta 1 ≈100% ITM Gamma 0 Theta -0.013 Vega 0 Open interest 62 Model this call Put · $135 Snapshot session Aug 13, 2026 Last $1.93 Breakeven $133.07 Implied vol 142.6% Delta -0.171 ≈17% ITM Gamma 0.01 Theta -0.689 Vega 0.043 Open interest 292 Model this put
56	4	72.3%	0.905	$13.70		$2.09	-0.13	86.1%	4	53
Call · $140 In the money Snapshot session Aug 13, 2026 Last $13.70 Breakeven $153.70 Implied vol 72.3% Delta 0.905 ≈91% ITM Gamma 0.013 Theta -0.244 Vega 0.029 Open interest 56 Model this call Put · $140 Snapshot session Aug 13, 2026 Last $2.09 Breakeven $137.91 Implied vol 86.1% Delta -0.13 ≈13% ITM Gamma 0.014 Theta -0.349 Vega 0.043 Open interest 53 Model this put
502	1	64.6%	0.835	$10.00		$1.60	-0.243	94%	20	36
Call · $145 In the money Snapshot session Aug 14, 2026 Last $10.00 Breakeven $155.00 Implied vol 64.6% Delta 0.835 ≈83% ITM Gamma 0.022 Theta -0.318 Vega 0.044 Open interest 502 Model this call Put · $145 Snapshot session Aug 13, 2026 Last $1.60 Breakeven $143.40 Implied vol 94% Delta -0.243 ≈24% ITM Gamma 0.019 Theta -0.56 Vega 0.058 Open interest 36 Model this put
26	2	40.2%	0.784	$6.10		$8.50	-0.322	72.1%	18	17
Call · $150 In the money Snapshot session Aug 13, 2026 Last $6.10 Breakeven $156.10 Implied vol 40.2% Delta 0.784 ≈78% ITM Gamma 0.043 Theta -0.24 Vega 0.045 Open interest 26 Model this call Put · $150 Snapshot session Aug 6, 2026 Last $8.50 Breakeven $141.50 Implied vol 72.1% Delta -0.322 ≈32% ITM Gamma 0.029 Theta -0.494 Vega 0.059 Open interest 17 Model this put
20	2	56.9%	0.519	$4.00		$15.00	-0.48	64%	1	1
Call · $155 In the money Snapshot session Aug 7, 2026 Last $4.00 Breakeven $159.00 Implied vol 56.9% Delta 0.519 ≈52% ITM Gamma 0.041 Theta -0.447 Vega 0.069 Open interest 20 Model this call Put · $155 Snapshot session Aug 6, 2026 Last $15.00 Breakeven $140.00 Implied vol 64% Delta -0.48 ≈48% ITM Gamma 0.037 Theta -0.488 Vega 0.069 Open interest 1 Model this put
Underlying $155.10
271	23	48.5%	0.296	$2.00		—	-0.655	63.4%	—	0
Call · $160 Snapshot session Aug 14, 2026 Last $2.00 Breakeven $162.00 Implied vol 48.5% Delta 0.296 ≈30% ITM Gamma 0.041 Theta -0.324 Vega 0.061 Open interest 271 Model this call Put · $160 In the money Snapshot session Unknown Last — Breakeven — Implied vol 63.4% Delta -0.655 ≈66% ITM Gamma 0.034 Theta -0.44 Vega 0.061 Open interest 0 Model this put
2	1	50.7%	0.142	$0.50		—	-0.8	62.9%	—	0
Call · $165 Snapshot session Aug 13, 2026 Last $0.50 Breakeven $165.50 Implied vol 50.7% Delta 0.142 ≈14% ITM Gamma 0.026 Theta -0.222 Vega 0.048 Open interest 2 Model this call Put · $165 In the money Snapshot session Unknown Last — Breakeven — Implied vol 62.9% Delta -0.8 ≈80% ITM Gamma 0.026 Theta -0.326 Vega 0.048 Open interest 0 Model this put
1	1	59.5%	0.089	$0.75		—	-0.909	60.5%	—	0
Call · $170 Snapshot session Aug 6, 2026 Last $0.75 Breakeven $170.75 Implied vol 59.5% Delta 0.089 ≈9% ITM Gamma 0.016 Theta -0.185 Vega 0.032 Open interest 1 Model this call Put · $170 In the money Snapshot session Unknown Last — Breakeven — Implied vol 60.5% Delta -0.909 ≈91% ITM Gamma 0.016 Theta -0.178 Vega 0.032 Open interest 0 Model this put
0	1	78.6%	0.092	$0.75		—	-0.979	54.2%	—	0
Call · $175 Snapshot session Aug 6, 2026 Last $0.75 Breakeven $175.75 Implied vol 78.6% Delta 0.092 ≈9% ITM Gamma 0.012 Theta -0.248 Vega 0.033 Open interest 0 Model this call Put · $175 In the money Snapshot session Unknown Last — Breakeven — Implied vol 54.2% Delta -0.979 ≈98% ITM Gamma 0.006 Theta -0.045 Vega 0.008 Open interest 0 Model this put
1	1	91.2%	0.076	$0.45		$58.40	—	—	2	2
Call · $180 Snapshot session Aug 11, 2026 Last $0.45 Breakeven $180.45 Implied vol 91.2% Delta 0.076 ≈8% ITM Gamma 0.009 Theta -0.253 Vega 0.033 Open interest 1 Model this call Put · $180 In the money Snapshot session Jun 26, 2026 Last $58.40 Breakeven $121.60 Implied vol — Delta — Gamma — Theta — Vega — Open interest 2 Model this put
0	—	157.6%	0.181	—		—	—	—	—	0
Call · $185 Snapshot session Unknown Last — Breakeven — Implied vol 157.6% Delta 0.181 ≈18% ITM Gamma 0.01 Theta -0.795 Vega 0.05 Open interest 0 Model this call Put · $185 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
1	1	109%	0.054	$0.55		—	—	—	—	0
Call · $190 Snapshot session Aug 11, 2026 Last $0.55 Breakeven $190.55 Implied vol 109% Delta 0.054 ≈5% ITM Gamma 0.006 Theta -0.228 Vega 0.02 Open interest 1 Model this call Put · $190 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
2	1	119.9%	0.05	$0.45		—	—	—	—	0
Call · $195 Snapshot session Aug 11, 2026 Last $0.45 Breakeven $195.45 Implied vol 119.9% Delta 0.05 ≈5% ITM Gamma 0.005 Theta -0.235 Vega 0.02 Open interest 2 Model this call Put · $195 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
1	1	130.6%	0.047	$0.05		—	—	—	—	0
Call · $200 Snapshot session Aug 13, 2026 Last $0.05 Breakeven $200.05 Implied vol 130.6% Delta 0.047 ≈5% ITM Gamma 0.004 Theta -0.242 Vega 0.02 Open interest 1 Model this call Put · $200 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put

About this data

Each contract's last price, volume, greeks, implied volatility and open interest belongs to the snapshot session shown in its details; unknown means the provider omitted the timestamp. This chain has mixed snapshot sessions · Jun 18, 2026–Aug 14, 2026; 28 unknown. Cross-contract positioning totals are shown only when every returned row has the same known session. Bid and ask are not included on this plan.

In-the-money strikes are tinted, deepening toward the money, and the bar beside each open-interest figure scales to the heaviest strike shown. The 22 strikes around the money are shown by default — switch to "All 30" for the wings.

Key facts CIK 1377121 CUSIP 74366E102 13F (30d) 326 filings 319 filers Visit website Investor relations