422 calls and 2.57K puts traded on Nov 4, 2026, 2.99K contracts in total. Open interest was 42.33K contracts. Over the past 30 days, volume averaged 876 contracts per day. The AM option volume chart shows volume by strike and expiration date.

Antero Midstream IV rank is 6, so its 30-day implied volatility of 26.5% is near the bottom of its one-year range. Over the past year it ranged from 17.5% on Dec 22, 2025 to 167.0% on Oct 16, 2026. See the AM implied volatility history for a longer view.

The Antero Midstream put/call volume ratio was 6.09 on Nov 4, 2026, so puts outnumber calls. The put/call open interest ratio was 0.30. The AM open interest chart shows calls and puts at each strike.

As of the Nov 4, 2026 close, max pain for Antero Midstream options about one week from expiration was $21.09, 6.2% above the $19.86 close. The AM max pain chart shows it for every expiration date.

Based on 7-day implied volatility of 27.6%, options price a move of about ±$0.76 (±3.8%) over the next week, a range of roughly $19.10 to $20.62 from the Nov 4, 2026 close. The AM expected move chart shows it for every expiration date.