0001562180-21-000081 4 1 20201231 20210105 20210105 Siwek William E 0001645109 4 34 001-37839 21505422 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 2020-12-31 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 President and CEO Common Stock 2020-12-31 4 M false 27933.00 0.00 A 106579.00 D Common Stock 2020-12-31 4 F false 11746.00 52.78 D 94833.00 D Restricted Stock Units 2020-12-31 4 M false 27933.00 0.00 D Common Stock 27933.00 0.00 D Represents the shares required to satisfy tax withholding obligations in connection with the vesting of 27,933 performance based restricted stock units ("Performance Based RSUs"). The Performance Based RSUs vested in full on December 31, 2020. The reporting person was eligible to receive 100% of the Performance Based RSUs if (i) the Issuer's 30 day, volume weighted average stock price exceeded the following stock price hurdles: $28, $33 and $38; and (ii) the reporting person provided continuous service to the Issuer, during the applicable performance period of the underlying award (March 14, 2018 to December 31, 2020). Each RSU represents a contingent right to receive one share of the common stock. All unvested RSUs will automatically expire upon Reporting Person's termination of service from Issuer. /s/ Steven G. Fishbach, Attorney-in-Fact 2021-01-05