Exhibit 31.3
CERTIFICATIONS
I, William P. Livek, certify that:
1. I have reviewed this Annual Report on Form10-K/A of comScore, 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.
| /s/ William P. Livek |
William P. Livek |
| Chief Executive Officer |
| (Principal Executive Officer) |
Date: April 29, 2020
