Weekly and End-of-Month Equity Future Option settlement values can be found on the CME's Special Fixing Prices web page. Once there, select the "Equities" tab and choose a date.
On expiration days, the CME calculates a special fixing price based on the weighted average trading price of the designated lead month of the respective futures contract in the last 30 seconds (2:59:30 - 3:00:00 p.m.) of trading before the 3:00 p.m. (Chicago Time) options expiration. That value is updated on the CME's Special Fixing Prices web site a short time after 3:00 PM CST.