X0306 4 2016-12-08 0 0001574815 BMC STOCK HOLDINGS, INC. BMCH 0001134049 VERTUCA CARL R JR C/O BMC STOCK HOLDINGS, INC. 980 HAMMOND DRIVE NE, SUITE 500 ATLANTA GA 30328 1 0 0 0 Common Stock 2016-12-08 4 S 0 400 20.00 D 134149 D Common Stock 2016-12-09 4 S 0 9600 20.00 D 124549 D Common Stock 14000 I See Footnote MJR Ventures, LLC ("MJR") is the beneficial owner of such shares of common stock of the Issuer ("Common Stock"). The Reporting Person is a managing member of MJR and may therefore be deemed to beneficially own the securities of the Issuer held by MJR. The Reporting Person expressly disclaims beneficial ownership of such securities, except to the extent of the Reporting Person's pecuniary interest therein. The filing of this statement shall not be deemed to be an admission that, for purposes of Section 16 of the Securities Exchange Act of 1934 or otherwise, the Reporting Person is the beneficial owner of such securities beneficially owned by MJR. By: /s/ Paul M. Street by power of attorney for Carl R. Vertuca, Jr. 2016-12-09