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Large Decrease in Open Interest

GOSS Gossamer Bio0.41-0.01 (-3.1%)

The open interest (OI) on the 20-Mar-26 2.00 strike decreased by 242 call contracts and 24,370 puts. The total OI for the expiration was decreased by 3x the average option volume. View Open Interest
Something to keep an eye on: Mostly professional traders are showing a short build up in $GOSS. Net option volume delta is -209 K!
Large Increase in Open Interest

GOSS Gossamer Bio0.42-1.71 (-80.3%)

The open interest (OI) on the 20-Mar-26 3.00 strike increased by 4,288 call contracts and 4,040 puts. The total OI for the expiration was increased by 2x the average option volume. View Open Interest
Unusual Option Volume

GOSS Gossamer Bio0.48-1.65 (-77.5%)

Gossamer Bio trades 7,465 contracts. The company has the following event: Conference Call and Webcast to Discuss Phase 3 PROSERA Study Topline Results on Feb 23, 2026. News: Gossamer Bio Announces Topline Results from the Phase 3 PROSERA Study Evaluating Seralutinib in Pulmonary Arterial Hypertension
Unusual Option Volume

GOSS Gossamer Bio2.09-0.02 (-1.0%)

Gossamer Bio trades 5,518 contracts.
Large Increase in Open Interest

GOSS Gossamer Bio2.19+0.02 (+0.9%)

The open interest (OI) on the 20-Mar-26 2.00 strike increased by 14 call contracts and 8,328 puts. The total OI for the expiration was increased by 13,456. View Open Interest
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