RGEN Unusual Option Activity
Repligen Corp (RGEN) option volume on Nov 4, 2026 was 0.4% of open interest, well below the 20-day average of 3.7%. Calls made up 44.9% of the volume.
RGEN Unusual Options FAQ
What makes option activity unusual?
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.
Is RGEN seeing unusual options activity?
On Nov 4, 2026, Repligen options traded 49 contracts against 13.76K 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.
Are RGEN traders trading more calls or puts?
Calls made up 44.9% of Repligen option volume on Nov 4, 2026, a put/call ratio of 1.23, so puts outnumber calls. The RGEN option volume chart shows calls and puts by strike.
What is Repligen Corp?
Repligen, headquartered in Waltham, Massachusetts, is a global life sciences company that develops and sells bioprocessing equipment and supplies used in the manufacturing of biologic drugs, including monoclonal antibodies, recombinant proteins, vaccines, and cell and gene therapies.