Maine Beer Company of Freeport, WEX of Portland, Sargent Corporation of Orono and Panolam Surface Systems of Auburn received awards at the Blaine House.
Janet Mills said the companies embody the best of what the state has to offer.
The annual awards, which have been handed out since 1991, honored companies this year in the categories of innovation, rural revitalization and heritage industries.
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The country’s first green coworking space, Green Spaces, is a hub for green and socially conscious businesses in Denver to work and connect with each other.