F1Common Stock sold by Ardsley Partners Fund II, L.P., a Delaware limited partnership ("APII"), Ardsley Partners US Equity UCITS Fund, an Irish UCITS plc ("Ardsley US Equity") and Ardsley Partners Institutional Fund, L.P., a Delaware limited partnership ("Ardsley Institutional").
F2The shares reported in Column 5 of this Table I are held directly by Ardsley US Equity, APII, Ardsley Institutional, Ardsley Partners Renewable Energy Fund, L.P. a Delaware limited partnership ("Ardsley Energy"), and certain accounts (the "Accounts") managed directly by Philip J. Hempleman ("Mr. Hempleman"). Ardsley Advisory Partners, a New York general partnership ("Ardsley"), serves as investment adviser to APII, Ardsley Institutional and Ardsley Energy and has investment discretion over the securities held by each. Ardsley Partners I, a New York general partnership ("Ardsley Partners"), serves as the general partner of APII, Ardsley Institutional and Ardsley Energy along with Mr. Hempleman, and has investment discretion over the securities held by each.
F3In addition to being the general partner of APII, Ardsley Institutional and Ardsley Energy, Mr. Hempleman is the Managing Partner of Ardsley and Ardsley Partners, and in such capacity has investment discretion with respect to the securities held or managed by each of them as well as the securities held by the Accounts. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of its or his own actual pecuniary interest therein.