Share this article Share this article HONOLULU, April 8, 2021 /PRNewswire/ -- The Sonic Fund II, L.P. ("Sonic"), which beneficially owns approximately 6.7% of the outstanding common stock of Adverum Biotechnologies, Inc. (NASDAQ: ADVM) (the "Company" or "Adverum"), announced today that it has filed a preliminary proxy statement and GREEN proxy card with the SEC in conjunction with the Company's 2021 annual meeting of shareholders (the "2021 Annual Meeting"), which is expected to take place sometime in mid-May to early June. In addition, due to the short interest in Adverum's stock, Sonic provided guidance to shareholders about how to ensure their shares can be voted at the 2021 Annual Meeting.