Clene Inc. (CLNN) Upgraded to Buy: What Does It Mean for the Stock? Posted byZacks Equity Research December 2, 2021 Leave a comment on Clene Inc. (CLNN) Upgraded to Buy: What Does It Mean for the Stock? Clene Inc. (CLNN) might move higher on growing optimism about its earnings prospects, which is reflected by its upgrade to a Zacks Rank #2 (Buy).