0001562180-17-003328 4 1 20171023 20171025 20171025 Siwek William E 0001645109 4 34 001-37839 171153152 C/O TPI COMPISITES, INC. 8501 N. SCOTTSDALE RD, SUITE 280 SCOTTSDALE AZ 85253 TPI COMPOSITES, INC 0001455684 3510 201590775 8501 N SCOTTSDALE ROAD GAINEY CENTER II, SUITE 100 SCOTTSDALE AZ 85253 480-305-8910 8501 N SCOTTSDALE ROAD GAINEY CENTER II, SUITE 100 SCOTTSDALE AZ 85253 TPI COMPOSITES INC 20090206 4 1 primarydocument.xml PRIMARY DOCUMENT X0306 4 2017-10-23 false 0001455684 TPI COMPOSITES, INC TPIC 0001645109 Siwek William E 8501 NORTH SCOTTSDALE ROAD, GAINEY CENTER II, SUITE 100 SCOTTSDALE AZ 85253 false true false false CFO Restricted Stock Units 2017-10-23 4 A false 20020.00 0.00 A Common Stock 20020.00 72820.00 D Each restricted stock unit ("RSU") represents a contingent right to receive one share of Common Stock. Unvested RSUs will automatically expire upon the Reporting Person's termination of service from the Issuer. The RSUs vest in three tranches as follows: 20% on March 7, 2018, 30% on March 7, 2019 and 50% on March 7, 2020; provided, that the Reporting Person continues to provide service to the Issuer through the applicable vesting date. /s/ Steven G. Fishbach, Attorney-in-Fact 2017-10-25