136 calls and 59 puts traded on Nov 4, 2026, 195 contracts in total. Open interest was 26.0K contracts. Over the past 30 days, volume averaged 3.23K contracts per day. The TWST option volume chart shows volume by strike and expiration date.

Twist Bioscience IV rank is 40, so its 30-day implied volatility of 121.5% is near the middle of its one-year range. Over the past year it ranged from 59.5% on Dec 30, 2025 to 213.8% on Jan 16, 2026. See the TWST implied volatility history for a longer view.

The Twist Bioscience put/call volume ratio was 0.43 on Nov 4, 2026, so calls outnumber puts. The put/call open interest ratio was 0.62. The TWST open interest chart shows calls and puts at each strike.

As of the Nov 4, 2026 close, max pain for Twist Bioscience options about one week from expiration was $155.11, 8.7% above the $142.71 close. The TWST max pain chart shows it for every expiration date.

Based on 7-day implied volatility of 137.9%, options price a move of about ±$27.25 (±19.1%) over the next week, a range of roughly $115.46 to $169.96 from the Nov 4, 2026 close. The TWST expected move chart shows it for every expiration date.