0001193125-18-115669 SC 13D/A 1 20180412 20180412 DAN H. WILKS FARRIS WILKS SDW INVESTMENTS, LLC STACI WILKS Approach Resources Inc 0001405073 1311 510424817 DE 1231 SC 13D/A 34 005-83760 18752722 ONE RIDGMAR CENTRE 6500 WEST FREEWAY, SUITE 800 FORT WORTH TX 76116 8179899000 ONE RIDGMAR CENTRE 6500 WEST FREEWAY, SUITE 800 FORT WORTH TX 76116 Wilks Brothers, LLC 0001662888 452388948 TX 1231 SC 13D/A 17010 INTERSTATE 20 CISCO TX 76437 8178192578 17010 INTERSTATE 20 CISCO TX 76437 SC 13D/A 1 d519105dsc13da.htm SC 13D/A