RGEN Open Interest
Repligen Corp (RGEN) had 13.76K open option contracts as of Nov 4, 2026: 4.04K calls and 9.71K puts. Open interest fell 15.1% over the past four weeks. The put/call open interest ratio is 2.40, so puts outnumber calls.
Open Interest by Strike
Showing results for RGEN, 2026-11-20(m), calls & puts
Open Interest Stats
Showing results for RGEN, 2026-11-20(m), calls & puts
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| Put Open Interest Total | |
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| Put-Call Open Interest Ratio |
Highest Open Interest Options
Showing results for RGEN, 2026-11-20(m), calls & puts
Open Interest Total by Expiry
Showing results for RGEN, 2026-11-20(m), calls & puts. View all expiries
Open Interest History
Showing daily totals for RGEN, all expirations, calls & puts. View full history
RGEN Open Interest FAQ
What is open interest?
Open interest is the number of option contracts that are open and not yet closed, exercised, or expired. The Options Clearing Corporation calculates it once a day from the previous day's trades, and it is published before the market opens.
How much open interest does RGEN have?
Repligen had 13.76K open option contracts as of Nov 4, 2026. Over the past 30 days, open interest averaged 13.93K contracts.
Is RGEN open interest rising or falling?
Open interest fell 15.1% over the past four weeks. It was 16.2K contracts on Oct 7, 2026. See the RGEN open interest history for a longer view.
What is the RGEN put/call open interest ratio?
The Repligen put/call open interest ratio was 2.40 as of Nov 4, 2026. Four weeks earlier it was 1.72.
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.