BYRN · Byrna Technologies Inc.

Track BYRN — free Ask ALVIS about BYRN

$4.67 -0.07 (-1.48%) At close · Aug 5

Market Cap

$105.98M

22.69M

Options Chain

15-min delayed Underlying $4.67 · at close Aug 5, 2026 Options Calculator

Positioning

Aug 21, 2026 · 15 days to expiry · 10 contracts

Put / call OI

0.16

Call-heavy positioning

Open interest

716

contracts outstanding

Volume

traded today

Max pain

$5.00

$0.33 above spot

ATM implied vol

90.4%

market's expected move

Open interest by strike

Calls Puts

2.5

7.5

12.5

Chain

Click any strike for greeks, breakeven and the calculator

Expiry

Aug 21 15d Sep 18 43d Dec 18 134d Jan 15 162d Mar 19 225d Jan 21 533d

Calls						Puts
OI	Vol	IV	Δ	Last	Strike	Last	Δ	IV	Vol	OI
18	12	—	—	$2.28		$0.05	—	—	6	8
Call · $2.5 In the money Last $2.28 Breakeven $4.78 Implied vol — Delta — Gamma — Theta — Vega — Open interest 18 Model this call Put · $2.5 Last $0.05 Breakeven $2.45 Implied vol — Delta — Gamma — Theta — Vega — Open interest 8 Model this put
Underlying $4.67
520	36	85.7%	0.437	$0.20		$0.60	-0.55	95.1%	2	86
Call · $5 Last $0.20 Breakeven $5.20 Implied vol 85.7% Delta 0.437 ≈44% ITM Gamma 0.471 Theta -0.011 Vega 0.004 Open interest 520 Model this call Put · $5 In the money Last $0.60 Breakeven $4.40 Implied vol 95.1% Delta -0.55 ≈55% ITM Gamma 0.428 Theta -0.012 Vega 0.004 Open interest 86 Model this put
58	17	282.2%	0.312	$0.03		$3.40	-0.878	164.7%	1	4
Call · $7.5 Last $0.03 Breakeven $7.53 Implied vol 282.2% Delta 0.312 ≈31% ITM Gamma 0.129 Theta -0.032 Vega 0.003 Open interest 58 Model this call Put · $7.5 In the money Last $3.40 Breakeven $4.10 Implied vol 164.7% Delta -0.878 ≈88% ITM Gamma 0.127 Theta -0.01 Vega 0.002 Open interest 4 Model this put
21	5	254.2%	0.123	$0.05		—	-0.904	235.6%	—	0
Call · $10 Last $0.05 Breakeven $10.05 Implied vol 254.2% Delta 0.123 ≈12% ITM Gamma 0.081 Theta -0.017 Vega 0.002 Open interest 21 Model this call Put · $10 In the money Last — Breakeven — Implied vol 235.6% Delta -0.904 ≈90% ITM Gamma 0.076 Theta -0.012 Vega 0.001 Open interest 0 Model this put
0	—	—	—	—		$8.85	-0.883	315.7%	1	1
Call · $12.5 Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $12.5 In the money Last $8.85 Breakeven $3.65 Implied vol 315.7% Delta -0.883 ≈88% ITM Gamma 0.065 Theta -0.019 Vega 0.002 Open interest 1 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 1354866 CUSIP 12448X201 13F (30d) 27 filings 27 filers Visit website Investor relations