Mirum Pharmaceuticals (MIRM) Options Chain

NASDAQ: MIRMHealth CareBiotechnology: Pharmaceutical PreparationsUSD

86.01+4.66 (+5.73%)

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

Expiration date

Expiration: Dec 18, 2026
Days to expiration: 68
Share price: $86.01
Put/call ratio (OI): 0.37
Put/call ratio (volume): 0.18
ATM implied volatility: 70.0%
Expected move: ±$26.00
Open interest (C / P): 1.32K / 493

MIRM options summary

The MIRM options chain for the December 18, 2026 expiration lists 24 call and 10 put contracts, with 68 days until expiration. Open interest stands at 1,318 calls and 493 puts, a put/call ratio of 0.37, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $85.00 strike is 70.0%, which implies the market expects a move of about ±$26.00 (30.2%) in Mirum Pharmaceuticals stock by expiration.

The most open interest sits at the $150.00 call (467 contracts) and the $85.00 put (413 contracts).

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

MIRM options chain · December 18, 2026

MIRM 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
—	—	—	—	—	—	45.00	0.10	4.90	4.65	136.4%	1	2
0	5	337.4%	33.46	54.00	59.00	50.00	0.50	5.50	3.02	126.3%	—	2
1	—	311.7%	29.70	50.00	55.00	55.00	—	—	—	—	—	—
5	1	194.9%	49.50	36.50	41.40	60.00	0.10	4.90	3.00	87.6%	16	25
0	1	—	32.50	0.00	0.00	70.00	7.50	12.50	7.90	126.2%	1	0
0	17	—	25.28	0.00	0.00	75.00	—	—	—	—	—	—
41	1	166.7%	35.40	24.20	29.00	80.00	5.80	10.00	9.99	74.2%	3	32
—	—	—	—	—	—	85.00	7.70	12.00	11.50	70.0%	7	413
MIRM $86.01
95	4	74.2%	9.90	7.00	11.80	90.00	10.70	15.50	13.30	72.3%	8	11
83	12	136.4%	36.50	14.50	19.30	95.00	13.50	18.30	16.26	69.2%	3	6
122	123	75.7%	5.80	4.00	8.80	100.00	0.00	0.00	15.90	—	—	0
434	8	72.8%	6.00	2.50	7.10	105.00	17.50	22.30	16.20	61.3%	2	2
7	1	72.2%	8.38	1.50	6.00	110.00	—	—	—	—	—	—
3	1	75.6%	2.10	1.30	5.40	115.00	—	—	—	—	—	—
15	10	76.7%	7.00	0.50	5.10	120.00	—	—	—	—	—	—
21	20	79.0%	2.80	0.05	4.90	125.00	—	—	—	—	—	—
0	10	25.0%	10.50	0.00	0.00	135.00	—	—	—	—	—	—
1	—	97.8%	2.90	0.05	4.90	145.00	—	—	—	—	—	—
467	1	101.6%	2.45	0.00	4.90	150.00	—	—	—	—	—	—
12	1	105.5%	2.15	0.00	4.90	155.00	—	—	—	—	—	—
5	4	109.2%	1.30	0.00	4.90	160.00	—	—	—	—	—	—
1	—	112.8%	2.90	0.00	4.90	165.00	—	—	—	—	—	—
1	1	116.2%	1.90	0.00	4.90	170.00	—	—	—	—	—	—
3	—	119.5%	4.50	0.00	4.90	175.00	—	—	—	—	—	—
0	2	25.0%	2.85	0.00	0.00	180.00	—	—	—	—	—	—
1	—	125.6%	1.60	0.00	4.90	185.00	—	—	—	—	—	—

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 MIRM put/call ratio?

For the December 18, 2026 expiration, the MIRM put/call ratio based on open interest is 0.37 (493 puts vs 1,318 calls), and 0.18 based on today's volume. A ratio above 1 means more puts than calls.

What is MIRM's implied volatility?

At-the-money implied volatility for MIRM options expiring December 18, 2026 is about 70.0%, an annualized estimate of how much the market expects Mirum Pharmaceuticals stock to move.

How many MIRM option expiration dates are there?

MIRM has 7 listed expiration dates, from Oct 16, 2026 to Dec 17, 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.