AON open interest by strike
From the closing options book · October 20, 2026 · updated after every close
At the October 20, 2026 close, AON options within 45 days held 1,395 calls and 1,325 puts in open interest, a put/call ratio of 0.95. The biggest call strike near the money was 300 and the biggest put strike 310.
AON open interest by strike, within 5% of the close
300 carried 362 calls and 310 carried 804 puts.
Open interest counts contracts still open after the close; it settles overnight. Large strikes are where dealer hedging is concentrated, which is why open interest feeds the gamma levels and max pain on the other AON pages.
These are the October 20, 2026 closing numbers. Members see AON's map move live all session.
Common questions
1,395 calls and 1,325 puts within 45 days at the October 20, 2026 close.
300 near the money, with 362 contracts.
310 near the money, with 804 contracts.
Compare: open interest by strike on other tickers
Measured from the closing options book and rebuilt after every close. Nothing on this page is live. Levels are where dealer hedging is concentrated, not targets or forecasts. Not investment advice.