Additional Proxy Soliciting Materials (Form DEFA14A)

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of the Securities
Exchange Act of 1934 (Amendment No. )

Filed by the Registrant ☒

Filed by a Party other than the Registrant ☐

Check the appropriate box:

ATEA PHARMACEUTICALS, INC.

(Name of Registrant as Specified In Its Charter)

_____________________________________________________________________________________________
(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (Check all boxes that apply):

Your Vote Counts! ATEA PHARMACEUTICALS, INC. 2026 Annual Meeting Vote by June 17, 2026 11:59 PM ET ATEA PHARMACEUTICALS, INC. 225 FRANKLIN STREET, SUITE 2100 BOSTON, MA 02110 V93924-P52208 You invested in ATEA PHARMACEUTICALS, INC. and it's time to vote! You have the right to vote on proposals being presented at the Annual Meeting. This is an important notice regarding the availability of proxy materials for the stockholder meeting to be held on June 18, 2026. Get informed before you vote View the Notice and Proxy Statement and Form 10-K online OR you can receive a free paper or email copy of the material(s) by requesting prior to June 4, 2026. If you would like to request a copy of the material(s) for this and/or future stockholder meetings, you may (1) visit www.ProxyVote.com, (2) call 1-800-579-1639 or (3) send an email to [email protected]. If sending an email, please include your control number (indicated below) in the subject line. Unless requested, you will not otherwise receive a paper or email copy. For complete information and to vote, visit www.ProxyVote.com Control # Vote Virtually at the Meeting* June 18, 2026 9:00 AM, EDT Smartphone users Point your camera here and vote without entering a control number Virtually at: www.virtualshareholdermeeting.com/AVIR2026 *Please check the meeting materials for any special requirements for meeting attendance.

Vote at www.ProxyVote.com THIS IS NOT A VOTABLE BALLOT This is an overview of the proposals being presented at the upcoming stockholder meeting. Please follow the instructions on the reverse side to vote these important matters. Board Recommends Voting Items 1. Election of Class III Directors For Nominees: 01) Jerome Adams, MD, MPH 02) Howard Berman, PhD 03) Barbara Duncan 2. Ratification of the appointment of KPMG LLP as our independent registered public accounting firm for the fiscal year ending December 31, 2026. For 3. Approval, on an advisory (non-binding) basis, of the compensation of the named executive officers of the Company. For NOTE: To transact such other business as may properly come before the Annual Meeting or any continuation, postponement, or adjournment of the Annual Meeting. Prefer to receive an email instead? While voting on www.ProxyVote.com, be sure to click "Delivery Settings". V93925-P52208