Terrestrial Energy (IMSR) Options Chain

NASDAQ: IMSRIndustrialsMetal FabricationsUSD

3.28-0.12 (-3.53%)

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

Expiration date

Expiration: Nov 20, 2026
Days to expiration: 40
Share price: $3.28
Put/call ratio (OI): 0.27
Put/call ratio (volume): 17.78
ATM implied volatility: 107.8%
Expected move: ±$1.17
Open interest (C / P): 8.96K / 2.38K

IMSR options summary

The IMSR options chain for the November 20, 2026 expiration lists 7 call and 6 put contracts, with 40 days until expiration. Open interest stands at 8,959 calls and 2,381 puts, a put/call ratio of 0.27, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $2.50 strike is 107.8%, which implies the market expects a move of about ±$1.17 (35.7%) in Terrestrial Energy stock by expiration.

The most open interest sits at the $7.50 call (2.78K contracts) and the $5.00 put (1.39K contracts).

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

IMSR options chain · November 20, 2026

IMSR 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
28	1	120.3%	0.92	0.80	1.10	2.50	0.05	0.15	0.10	95.3%	137	531
IMSR $3.28
1,251	21	128.9%	0.05	0.05	0.25	5.00	1.70	1.85	1.81	95.3%	506	1,385
2,776	5	131.3%	0.05	0.00	0.05	7.50	3.80	4.50	3.30	234.8%	80	457
2,600	1	165.6%	0.03	0.00	0.05	10.00	6.30	7.20	5.29	170.3%	5	2
1,856	1	228.1%	0.03	0.00	0.15	12.50	8.80	9.70	8.10	195.3%	1	2
219	11	209.4%	0.05	0.00	0.05	15.00	9.40	10.10	9.45	—	—	4
229	1	293.8%	0.25	0.00	0.25	17.50	—	—	—	—	—	—

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 IMSR put/call ratio?

For the November 20, 2026 expiration, the IMSR put/call ratio based on open interest is 0.27 (2,381 puts vs 8,959 calls), and 17.78 based on today's volume. A ratio above 1 means more puts than calls.

What is IMSR's implied volatility?

At-the-money implied volatility for IMSR options expiring November 20, 2026 is about 107.8%, an annualized estimate of how much the market expects Terrestrial Energy stock to move.

How many IMSR option expiration dates are there?

IMSR has 8 listed expiration dates, from Oct 16, 2026 to Jan 19, 2029.

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.