Option activity is usually called unusual when a contract trades much more volume than its open interest, which can mean traders are opening new positions.

On Nov 4, 2026, Gorman-Rupp options traded 0 contracts against 239 open, a volume to open interest ratio of 0.00, well below its 20-day average. The table above lists the contracts with the highest ratios.

Gorman-Rupp Co designs, manufactures, and globally sells pumps & pump systems for use in water, wastewater, construction, dewatering, industrial, petroleum, original equipment, agriculture, fire protection, heating, ventilating & air conditioning, military, and other liquid-handling applications.