PACB Open Interest
Pacific Biosciences of California Inc (PACB) had 234.64K open option contracts as of Nov 4, 2026: 217.06K calls and 17.58K puts. Open interest rose 23.0% over the past four weeks, and is PACB's highest level in 12 weeks. The put/call open interest ratio is 0.08, so calls outnumber puts.
Open Interest by Strike
Showing results for PACB, 2026-11-20(m), calls & puts
Open Interest Stats
Showing results for PACB, 2026-11-20(m), calls & puts
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| Put Open Interest Total | |
| Open Interest Total | |
| Put-Call Open Interest Ratio |
Highest Open Interest Options
Showing results for PACB, 2026-11-20(m), calls & puts
Open Interest Total by Expiry
Showing results for PACB, 2026-11-20(m), calls & puts. View all expiries
Open Interest History
Showing daily totals for PACB, all expirations, calls & puts. View full history
PACB 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 PACB have?
Pacific Biosciences of California had 234.64K open option contracts as of Nov 4, 2026. Over the past 30 days, open interest averaged 194.68K contracts.
Is PACB open interest rising or falling?
Open interest rose 23.0% over the past four weeks, and is PACB's highest level in 12 weeks. It was 190.69K contracts on Oct 7, 2026. See the PACB open interest history for a longer view.
What is the PACB put/call open interest ratio?
The Pacific Biosciences of California put/call open interest ratio was 0.08 as of Nov 4, 2026. Four weeks earlier it was 0.08.