9 calls and 50 puts traded on Nov 4, 2026, 59 contracts in total. Open interest was 1.45K contracts. Over the past 30 days, volume averaged 88 contracts per day. The DCI option volume chart shows volume by strike and expiration date.

Donaldson IV rank is 11, so its 30-day implied volatility of 34.4% is near the bottom of its one-year range. Over the past year it ranged from 18.5% on Dec 23, 2025 to 167.4% on Jul 17, 2026. See the DCI implied volatility history for a longer view.

The Donaldson put/call volume ratio was 5.56 on Nov 4, 2026, so puts outnumber calls. The put/call open interest ratio was 0.86. The DCI open interest chart shows calls and puts at each strike.

As of the Nov 4, 2026 close, max pain for Donaldson options about one week from expiration was $79.51, 7.1% below the $85.57 close. The DCI max pain chart shows it for every expiration date.

Based on 7-day implied volatility of 33.7%, options price a move of about ±$4.00 (±4.7%) over the next week, a range of roughly $81.57 to $89.57 from the Nov 4, 2026 close. The DCI expected move chart shows it for every expiration date.