The Sonic Fund II, L.P. Issues Presentation Correcting Adverum’s Misstatements

Highlights Numerous Mischaracterizations in Adverum’s Recent Investor Presentation

Sonic’s Sole Aim in this Contest is for Adverum to Have Best Board Possible to Ensure Development and Approval of Company’s Potentially Life-Changing Treatment

Urges Stockholders to Vote on the GREEN Proxy Card Today to Elect Sonic’s Three Independent Director Nominees to Drastically Improve Board

HONOLULU--()--The Sonic Fund II, L.P. (“Sonic”), which beneficially owns approximately 6.8% of the outstanding common stock of Adverum Biotechnologies, Inc. (NASDAQ: ADVM) (the “Company” or “Adverum”), today issued a supplemental presentation detailing – and correcting – a number of the Company’s recent misstatements. Sonic has nominated three independent, highly qualified director candidates – Jean Bennett, Jodi Cook and Herbert Hughes (the “Nominees”) – for election to the Adverum Board of Directors (the “Board”) at the 2021 Annual Meeting of Stockholders (the “2021 Annual Meeting”).

The presentation, entitled “Adverum’s Myths: Correcting the Record,” is available at: https://www.saveadverum.com/investor-materials.

Vote on the GREEN proxy card today

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Contacts

Investors:
Saratoga Proxy Consulting LLC
John Ferguson / Ann Marie Mellone 212-257-1311
jferguson@saratogaproxy.com / amellone@saratogaproxy.com

Media:
Sloane & Company
Joe Germani / Sarah Braunstein
jgermani@sloanepr.com / sbraunstein@sloanepr.com

Contacts

Investors:
Saratoga Proxy Consulting LLC
John Ferguson / Ann Marie Mellone 212-257-1311
jferguson@saratogaproxy.com / amellone@saratogaproxy.com

Media:
Sloane & Company
Joe Germani / Sarah Braunstein
jgermani@sloanepr.com / sbraunstein@sloanepr.com