JANX · Janux Therapeutics, Inc.

Track JANX — free Ask ALVIS about JANX

$15.00 -0.57 (-3.66%) At close · Jul 28

Market Cap

$914.77M

60.98M

Options Chain

15-min delayed Underlying $15.00 · at close Jul 28, 2026 Options Calculator

Positioning

Aug 21, 2026 · 23 days to expiry · 22 contracts

Put / call OI

1.43

Put-heavy positioning

Open interest

4,843

contracts outstanding

Volume

542

traded today

Max pain

$15.00

at the underlying

ATM implied vol

57.9%

market's expected move

Open interest by strike

Calls Puts

2.5

7.5

12.5

17.5

22.5

Chain

Click any strike for greeks, breakeven and the calculator

Expiry

Aug 21 23d Sep 18 51d Nov 20 114d Dec 18 142d Jan 15 170d Feb 19 205d Jan 21 541d

Calls						Puts
OI	Vol	IV	Δ	Last	Strike	Last	Δ	IV	Vol	OI
0	—	—	—	—		—	—	—	—	0
Call · $2.5 In the money Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $2.5 Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	—	—	—		$0.10	-0.066	506.8%	2	0
Call · $5 In the money Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $5 Last $0.10 Breakeven $4.90 Implied vol 506.8% Delta -0.066 ≈7% ITM Gamma 0.007 Theta -0.054 Vega 0.005 Open interest 0 Model this put
0	—	—	—	—		$0.50	—	—	28	29
Call · $7.5 In the money Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $7.5 Last $0.50 Breakeven $7.00 Implied vol — Delta — Gamma — Theta — Vega — Open interest 29 Model this put
0	—	—	—	—		$0.21	—	—	110	152
Call · $10 In the money Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $10 Last $0.21 Breakeven $9.79 Implied vol — Delta — Gamma — Theta — Vega — Open interest 152 Model this put
10	5	44.3%	0.958	$3.59		$0.10	-0.102	62.4%	1	1.3k
Call · $12.5 In the money Last $3.59 Breakeven $16.09 Implied vol 44.3% Delta 0.958 ≈96% ITM Gamma 0.053 Theta -0.004 Vega 0.003 Open interest 10 Model this call Put · $12.5 Last $0.10 Breakeven $12.40 Implied vol 62.4% Delta -0.102 ≈10% ITM Gamma 0.076 Theta -0.009 Vega 0.006 Open interest 1.3k Model this put
Underlying $15.00
646	57	50.4%	0.541	$0.80		$0.90	-0.457	65.3%	141	1.4k
Call · $15 Last $0.80 Breakeven $15.80 Implied vol 50.4% Delta 0.541 ≈54% ITM Gamma 0.211 Theta -0.017 Vega 0.015 Open interest 646 Model this call Put · $15 Last $0.90 Breakeven $14.10 Implied vol 65.3% Delta -0.457 ≈46% ITM Gamma 0.164 Theta -0.021 Vega 0.015 Open interest 1.4k Model this put
717	4	79.1%	0.257	$0.40		$2.20	-0.746	78.9%	5	8
Call · $17.5 Last $0.40 Breakeven $17.90 Implied vol 79.1% Delta 0.257 ≈26% ITM Gamma 0.109 Theta -0.021 Vega 0.011 Open interest 717 Model this call Put · $17.5 In the money Last $2.20 Breakeven $15.30 Implied vol 78.9% Delta -0.746 ≈75% ITM Gamma 0.11 Theta -0.02 Vega 0.011 Open interest 8 Model this put
193	1	79.6%	0.094	$0.10		—	-0.833	104.3%	—	0
Call · $20 Last $0.10 Breakeven $20.10 Implied vol 79.6% Delta 0.094 ≈9% ITM Gamma 0.056 Theta -0.011 Vega 0.008 Open interest 193 Model this call Put · $20 In the money Last — Breakeven — Implied vol 104.3% Delta -0.833 ≈83% ITM Gamma 0.065 Theta -0.02 Vega 0.011 Open interest 0 Model this put
309	184	102.6%	0.077	$0.10		$9.60	-0.844	135.8%	1	1
Call · $22.5 Last $0.10 Breakeven $22.60 Implied vol 102.6% Delta 0.077 ≈8% ITM Gamma 0.037 Theta -0.012 Vega 0.005 Open interest 309 Model this call Put · $22.5 In the money Last $9.60 Breakeven $12.90 Implied vol 135.8% Delta -0.844 ≈84% ITM Gamma 0.048 Theta -0.025 Vega 0.008 Open interest 1 Model this put
38	1	116.5%	0.057	$0.05		—	-0.902	139.9%	—	0
Call · $25 Last $0.05 Breakeven $25.05 Implied vol 116.5% Delta 0.057 ≈6% ITM Gamma 0.026 Theta -0.011 Vega 0.005 Open interest 38 Model this call Put · $25 In the money Last — Breakeven — Implied vol 139.9% Delta -0.902 ≈90% ITM Gamma 0.034 Theta -0.018 Vega 0.008 Open interest 0 Model this put
83	2	205.3%	0.144	$0.55		—	-0.948	154.6%	—	0
Call · $30 Last $0.55 Breakeven $30.55 Implied vol 205.3% Delta 0.144 ≈14% ITM Gamma 0.029 Theta -0.038 Vega 0.009 Open interest 83 Model this call Put · $30 In the money Last — Breakeven — Implied vol 154.6% Delta -0.948 ≈95% ITM Gamma 0.02 Theta -0.012 Vega 0.005 Open interest 0 Model this put

About this data

Greeks, implied volatility, open interest and the last price come from the latest daily snapshot and are 15-minute delayed. 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. Max pain is the listed strike where the most open interest would expire worthless — a positioning reference, not a forecast.

Key facts CIK 1817713 CUSIP 47103J105 13F (30d) 26 filings 26 filers Visit website Investor relations