FTNT Open Interest
Fortinet Inc (FTNT) had 173.38K open option contracts as of Nov 4, 2026: 87.02K calls and 86.36K puts. Open interest rose 10.1% over the past four weeks. The put/call open interest ratio is 0.99, so calls and puts are about even.
Open Interest by Strike
Showing results for FTNT, 2026-11-06(w), calls & puts
Open Interest Stats
Showing results for FTNT, 2026-11-06(w), calls & puts
| Call Open Interest Total | |
|---|---|
| Put Open Interest Total | |
| Open Interest Total | |
| Put-Call Open Interest Ratio |
Highest Open Interest Options
Showing results for FTNT, 2026-11-06(w), calls & puts
Open Interest Total by Expiry
Showing results for FTNT, 2026-11-06(w), calls & puts. View all expiries
Open Interest History
Showing daily totals for FTNT, all expirations, calls & puts. View full history
FTNT 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 FTNT have?
Fortinet had 173.38K open option contracts as of Nov 4, 2026. Over the past 30 days, open interest averaged 160.74K contracts.
Is FTNT open interest rising or falling?
Open interest rose 10.1% over the past four weeks. It was 157.43K contracts on Oct 7, 2026. See the FTNT open interest history for a longer view.
What is the FTNT put/call open interest ratio?
The Fortinet put/call open interest ratio was 0.99 as of Nov 4, 2026. Four weeks earlier it was 1.02.
What is Fortinet Inc?
Fortinet is a platform-based cybersecurity vendor with product offerings covering network security, cloud security, zero-trust access, and security operations.