0001562180-17-003324 4 1 20171023 20171025 20171025 Castle Thomas J 0001678414 4 34 001-37839 171153138 C/O TPI COMPOSITES, INC. 8501 N. SCOTTSDALE ROAD, SUITE 100 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 0001678414 Castle Thomas J 8501 NORTH SCOTTSDALE ROAD, GAINEY CENTER II, SUITE 100 SCOTTSDALE AZ 85253 false true false false See Remarks Restricted Stock Units 2017-10-23 4 A false 6980.00 0.00 A Common Stock 6980.00 6980.00 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. Senior Vice President - North American Wind Operations and Global Operational Excellence /s/ Steven G. Fishbach, Attorney-in-Fact 2017-10-25