Gentherm (THRM) Options Chain

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

29.68-0.25 (-0.84%)

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

Expiration date

Expiration: Dec 18, 2026
Days to expiration: 69
Share price: $29.68
Put/call ratio (OI): 0.39
Put/call ratio (volume): 3.73
ATM implied volatility: 0.8%
Expected move: ±$0.1007
Open interest (C / P): 7.87K / 3.03K

THRM options summary

The THRM options chain for the December 18, 2026 expiration lists 14 call and 10 put contracts, with 69 days until expiration. Open interest stands at 7,868 calls and 3,031 puts, a put/call ratio of 0.39, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $30.00 strike is 0.8%, which implies the market expects a move of about ±$0.1007 (0.3%) in Gentherm stock by expiration.

The most open interest sits at the $37.93 call (3.85K contracts) and the $40.00 put (2.00K contracts).

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

THRM options chain · December 18, 2026

THRM 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
—	—	—	14.50	—	—	12.93	—	—	—	—	—	—
6	—	426.0%	14.50	20.00	24.90	15.00	—	—	—	—	—	—
—	—	—	15.35	—	—	17.93	—	—	—	—	—	—
0	1	—	15.35	0.00	0.00	20.00	—	—	—	—	—	—
—	—	—	—	—	—	22.93	—	—	0.50	—	—	—
—	—	—	—	—	—	25.00	0.00	0.00	0.50	12.5%	—	0
2	1	57.0%	4.65	1.60	6.00	27.93	0.00	4.90	0.60	65.3%	—	8
THRM $29.68
1	1	0.8%	11.90	0.00	0.00	30.00	0.00	0.00	0.60	—	1	8
5	4	69.4%	1.70	0.00	2.35	32.93	2.75	7.00	3.40	54.9%	—	7
2	1	12.5%	3.00	0.00	0.00	35.00	0.00	0.00	3.40	—	3	7
3,851	10	61.0%	0.80	0.00	0.85	37.93	6.50	10.90	7.60	101.6%	1,000	1,000
799	1	12.5%	1.27	0.00	0.00	40.00	0.00	0.00	6.00	—	2	2,000
1,600	—	107.3%	0.80	0.00	4.00	42.93	—	—	6.08	—	—	—
1,600	250	25.0%	0.80	0.00	0.00	45.00	3.90	8.50	6.08	—	—	1
1	—	184.3%	0.50	—	4.90	47.93	—	—	—	—	—	—
1	1	25.0%	0.50	0.00	0.00	50.00	—	—	—	—	—	—

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 THRM put/call ratio?

For the December 18, 2026 expiration, the THRM put/call ratio based on open interest is 0.39 (3,031 puts vs 7,868 calls), and 3.73 based on today's volume. A ratio above 1 means more puts than calls.

What is THRM's implied volatility?

At-the-money implied volatility for THRM options expiring December 18, 2026 is about 0.8%, an annualized estimate of how much the market expects Gentherm stock to move.

How many THRM option expiration dates are there?

THRM 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.