Gentex (GNTX) Options Chain

NASDAQ: GNTXConsumer DiscretionaryAuto Parts:O.E.M.USD

21.04-0.11 (-0.52%)

At close: Oct 9, 4:00 PM ET · Delayed 15 min

Expiration date

Expiration: Dec 18, 2026
Days to expiration: 68
Share price: $21.04
Put/call ratio (OI): 0.17
Put/call ratio (volume): 0.92
ATM implied volatility: 58.6%
Expected move: ±$5.32
Open interest (C / P): 753 / 130

GNTX options summary

The GNTX options chain for the December 18, 2026 expiration lists 9 call and 7 put contracts, with 68 days until expiration. Open interest stands at 753 calls and 130 puts, a put/call ratio of 0.17, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $20.00 strike is 58.6%, which implies the market expects a move of about ±$5.32 (25.3%) in Gentex stock by expiration.

The most open interest sits at the $25.00 call (327 contracts) and the $22.50 put (70 contracts).

Summary generated from market data by MetaCap's automated system. Methodology

GNTX options chain · December 18, 2026

GNTX calls and puts by strike price. Shaded cells are in the money.
Calls							Puts
OI	Vol	IV	Last	Bid	Ask	Strike	Bid	Ask	Last	IV	Vol	OI
0	13	—	11.70	0.00	0.00	12.50	0.00	0.00	0.08	25.0%	46	0
22	20	196.1%	10.99	7.70	11.10	15.00	—	—	—	—	—	—
52	3	117.5%	4.59	1.90	5.90	17.50	0.00	1.15	0.38	54.9%	11	15
44	1	83.4%	2.70	0.45	3.50	20.00	0.40	0.75	0.65	33.7%	20	44
GNTX $21.04
141	2	40.3%	0.95	0.05	0.90	22.50	0.50	2.70	1.25	49.9%	9	70
327	20	61.3%	0.40	0.00	0.95	25.00	0.00	0.00	1.95	—	35	0
86	3	59.2%	0.10	0.00	0.95	27.50	5.40	7.40	4.45	76.3%	11	1
0	2	25.0%	0.15	0.00	0.00	30.00	0.00	0.00	6.18	—	—	0
81	80	85.5%	0.37	0.00	1.15	32.50	—	—	—	—	—	—

In-the-money callsIn-the-money puts. IV = implied volatility, OI = open interest (contracts). Each contract covers 100 shares. Quotes delayed at least 15 minutes.

Frequently asked questions

What is the GNTX put/call ratio?

For the December 18, 2026 expiration, the GNTX put/call ratio based on open interest is 0.17 (130 puts vs 753 calls), and 0.92 based on today's volume. A ratio above 1 means more puts than calls.

What is GNTX's implied volatility?

At-the-money implied volatility for GNTX options expiring December 18, 2026 is about 58.6%, an annualized estimate of how much the market expects Gentex stock to move.

How many GNTX option expiration dates are there?

GNTX has 4 listed expiration dates, from Oct 16, 2026 to Mar 19, 2027.

What does "in the money" mean?

A call is in the money when the strike price is below the current share price; a put is in the money when the strike is above it. In-the-money contracts have intrinsic value and are shaded in the table.