Exhibit 31.1
CERTIFICATION OF CHIEF EXECUTIVE OFFICER PURSUANT TO
SECURITIES EXCHANGE ACT RULES 13a-14(a) AND 15d-14(a), AS ADOPTED
PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002
I, Robert S. Yorgensen, certify that:
| 1. | I have reviewed this Amendment No. 1 on Form 10-K/A of STR Holdings, Inc.; and |
| 2. | Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report. |
| Date: April 27, 2018 | /s/Robert S. Yorgensen | |
| Name: | Robert S. Yorgensen | |
| Title: | Chairman, President and Chief Executive Officer (Principal Executive Officer) | |
