Form4insider filings, from the source

SEC Form 4 · accession 0001104659-18-014201

Summit Materials, Inc. · SUM

Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗

Reporting owner
Period of report
Feb 28, 2018
Accepted (ET)
Mar 1, 2018 · 8:56 pm EST
Rule 10b5-1 plan
unknown — predates the checkbox
Issuer CIK
0001621563

Table I — non-derivative securities

SecurityDateCodeSharesPriceA/DOwned afterD/INature of ownership
Class A Common StockF1,F2Feb 28, 2018M4,098—A10,601D

Table II — derivative securities

SecurityConv. / exercise priceDateCodeSharesA/DExercisableExpiresUnderlyingUnderlying sharesOwned afterD/I
Restricted Stock UnitsF3,F4—Feb 28, 2018M4,098D——Class A Common Stock4,0980D
Restricted Stock UnitsF3,F5—Feb 28, 2018A3,994A——Class A Common Stock3,9943,994D

Explanation of responses