SEC Form 4 · accession 0001104659-18-051549
Summit Materials, Inc. · SUM
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Susan A Ellerbusch
Director
Period of report
Aug 9, 2018
Accepted (ET)
Aug 13, 2018 · 6:03 pm EDT
Rule 10b5-1 plan
unknown — predates the checkbox
Issuer CIK
0001621563
Table I — non-derivative securities
No Table I lines on this filing.
Table II — derivative securities
| Security | Conv. / exercise price | Date | Code | Shares | A/D | Exercisable | Expires | Underlying | Underlying shares | Owned after | D/I |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Restricted Stock UnitsF1 | — | Aug 9, 2018 | A | 5,137 | A | — | — | Class A Common Stock | 5,137 | 5,137 | D |
Explanation of responses
- F1These restricted stock units vest on August 9, 2019.