Antero Midstream (AM) Options Chain

NYSE: AMUtilitiesNatural Gas DistributionUSD

21.09-0.10 (-0.47%)

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

Expiration date

Expiration: Dec 18, 2026
Days to expiration: 68
Share price: $21.09
Put/call ratio (OI): 1.40
Put/call ratio (volume): 1.49
ATM implied volatility: 28.8%
Expected move: ±$2.62
Open interest (C / P): 6.51K / 9.11K

AM options summary

The AM options chain for the December 18, 2026 expiration lists 15 call and 14 put contracts, with 68 days until expiration. Open interest stands at 6,513 calls and 9,109 puts, a put/call ratio of 1.40, which is more bearish, with puts outnumbering calls. At-the-money implied volatility near the $21.00 strike is 28.8%, which implies the market expects a move of about ±$2.62 (12.4%) in Antero Midstream stock by expiration.

The most open interest sits at the $22.00 call (3.76K contracts) and the $20.00 put (8.21K contracts).

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

AM options chain · December 18, 2026

AM 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	16	—	9.54	0.00	0.00	13.00	—	—	—	—	—	—
0	20	—	7.65	0.00	0.00	14.00	—	—	—	—	—	—
0	12	—	7.65	0.00	0.00	15.00	0.00	0.00	0.17	25.0%	—	0
0	8	—	6.75	0.00	0.00	16.00	—	—	—	—	—	—
11	2	66.1%	6.05	3.70	4.80	17.00	0.00	0.40	0.20	52.6%	50	50
0	2	—	4.00	0.00	0.00	18.00	0.05	0.40	0.20	43.0%	20	39
26	4	45.9%	2.65	1.95	2.85	19.00	0.20	0.30	0.25	29.5%	1	604
31	2	39.0%	1.05	1.15	2.00	20.00	0.40	0.55	0.50	28.1%	12	8,207
33	5	28.9%	1.00	0.85	1.10	21.00	0.85	1.00	0.90	28.6%	1	104
AM $21.09
3,764	4	27.9%	0.55	0.40	0.65	22.00	1.20	1.65	1.45	30.5%	1	21
366	5	28.8%	0.30	0.05	0.40	23.00	1.70	2.70	1.67	41.0%	2	14
752	6	35.8%	0.23	0.05	0.40	24.00	2.60	3.60	2.50	45.6%	9	22
1,393	1	38.1%	0.10	0.05	0.30	25.00	2.45	3.50	3.80	—	2	10
0	1	12.5%	0.30	0.00	0.00	26.00	4.40	5.60	3.85	58.7%	4	13
137	1	50.9%	0.22	0.00	0.35	27.00	5.30	6.70	5.40	68.0%	4	15
—	—	—	—	—	—	28.00	6.30	7.70	5.70	73.4%	3	9
—	—	—	—	—	—	29.00	6.40	7.60	6.85	—	24	1

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 AM put/call ratio?

For the December 18, 2026 expiration, the AM put/call ratio based on open interest is 1.40 (9,109 puts vs 6,513 calls), and 1.49 based on today's volume. A ratio above 1 means more puts than calls.

What is AM's implied volatility?

At-the-money implied volatility for AM options expiring December 18, 2026 is about 28.8%, an annualized estimate of how much the market expects Antero Midstream stock to move.

How many AM option expiration dates are there?

AM has 7 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.