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:
☐	Preliminary Proxy Statement
☐	Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))
☐	Definitive Proxy Statement
☒	Definitive Additional Materials
☐	Soliciting Material under §240.14a-12

HCW BIOLOGICS 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 the appropriate box):
☒	No fee required.
☐	Fee paid previously with preliminary materials.
☐	Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11.

Your Vote Counts! HCW BIOLOGICS Your Vote Counts! HCW BIOLOGICS INC. 2024 Annual Meeting Vote by June 13, 2024 11:59 PM ET HCW BIOLOGICS INC. 2929 N COMMERCE PARKWAY MIRAMAR, FL 33025 V36731-P09665 You invested in HCW BIOLOGICS 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 material for the stockholder meeting to be held on June 14, 2024. Get informed before you vote View the Notice and Proxy Statement and Annual Report online OR you can receive a free paper or email copy of the material(s) by requesting prior to May 31, 2024. 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 14, 2024 10:00 a.m. Eastern Time Virtually at: www.virtualshareholdermeeting.com/HCWB2024 *Please check the meeting materials for any special requirements for meeting attendance. Vote at www.ProxyVote.com INC. 2024 Annual Meeting Vote by June 13, 2024 11:59 PM ET HCW BIOLOGICS INC. 2929 N COMMERCE PARKWAY MIRAMAR, FL 33025 V36731-P09665 You invested in HCW BIOLOGICS 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 material for the stockholder meeting to be held on June 14, 2024. Get informed before you vote View the Notice and Proxy Statement and Annual Report online OR you can receive a free paper or email copy of the material(s) by requesting prior to May 31, 2024. 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 14, 2024 10:00 a.m. Eastern Time Virtually at: www.virtualshareholdermeeting.com/HCWB2024 *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. Voting Items 1.Elect Dr. Hing C. Wong as a Class III director to serve for a term of three years and until his successor is duly elected and qualified or until his earlier death, resignation, disqualification or removal. Nominee: 1a.Dr. Hing C. Wong For 2.Ratify the appointment of Grant Thornton LLP as the independent registered public accounting firm of HCW Biologics Inc. for the fiscal year ending December 31, 2024. For NOTE: Such other business as may properly come before the meeting or any adjournment thereof. Prefer to receive an email instead? While voting on www.ProxyVote.com, be sure to click "Delivery Settings". V36732-P09665