Marrone Bio Innovations (MBII) 10-K/A 2021 FY Annual report (amended)

Exhibit 31.3

I, Kevin Helash certify that:

1. I have reviewed this Annual Report on Form 10-K/A of Marrone Bio Innovations, 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 29, 2022

/s/ Kevin Helash

Kevin Helash

Chief Executive Officer