Option Chain for Summit Materials Inc. Class A (SUM) 

$ 22.55   0.03 (+0.13%) Volume: 858.45k 6:30 PM EDT Sep 13, 2019
After Hours:  $ 22.6565   0.1065 (+0.47%) Volume: 53.99k 4:11 PM EDT Sep 13, 2019
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Sep 19  |  Oct 19  |  Nov 19  |  Jan 20  |  Feb 20  |  Jan 21  |  Near Term  |  All
Calls Last Chg Volume Open Int Root Strike Puts Last Chg Volume Open Int
Sep 20, 2019 0.55 - 20 403 SUM 22.50 Sep 20, 2019 0.50   0 13