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

$ 18.50   -0.01 (-0.05%) Volume: 919.33k 4:02 PM EDT Jul 19, 2019
After Hours:  $ 18.50 0.00 (0.00%) Volume: 14.11k 5:04 PM EDT Jul 19, 2019
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Jul 19  |  Aug 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
Aug 16, 2019 1.85 0.18 68 4284 SUM 17.50 Aug 16, 2019 0.61 -0.09 67 460
Aug 16, 2019 0.55 -0.05 175 12708 SUM 20.00 Aug 16, 2019 1.97 -0.28 2 253