1.72K calls and 417 puts traded on Nov 4, 2026, 2.14K contracts in total. Open interest was 16.96K contracts. Over the past 30 days, volume averaged 1.71K contracts per day. The ECL option volume chart shows volume by strike and expiration date.

Ecolab IV rank is 6, so its 30-day implied volatility of 24.2% is near the bottom of its one-year range. Over the past year it ranged from 16.7% on Dec 22, 2025 to 151.4% on Oct 16, 2026. See the ECL implied volatility history for a longer view.

The Ecolab put/call volume ratio was 0.24 on Nov 4, 2026, so calls outnumber puts. The put/call open interest ratio was 0.48. The ECL open interest chart shows calls and puts at each strike.

As of the Nov 4, 2026 close, max pain for Ecolab options about one week from expiration was $300.00, 4.8% below the $315.09 close. The ECL max pain chart shows it for every expiration date.

Based on 7-day implied volatility of 25.0%, options price a move of about ±$10.89 (±3.5%) over the next week, a range of roughly $304.20 to $325.98 from the Nov 4, 2026 close. The ECL expected move chart shows it for every expiration date.