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 Rule 14a-12

SES AI Corporation

(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):

☒	No fee required.
☐	Fee computed 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! Vote Virtually at the Meeting* June 8, 2023 10:00 AM EDT Virtually at: www.virtualshareholdermeeting.com/SES2023 *Please check the meeting materials for any special requirements for meeting attendance. Smartphone users Point your camera here and vote without entering a control number V1.1 For complete information and to vote, visit www.ProxyVote.com Control # V11033-P86067 SES AI CORPORATION 2023 Annual Meeting Vote by June 7, 2023 11:59 PM ET SES AI CORPORATION 35 CABOT ROAD WOBURN, MA 01801 You invested in SES AI CORPORATION 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 8, 2023. Get informed before you vote View the Notice & 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 25, 2023. 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 sendmaterial@proxyvote.com. 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.

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. Vote at www.ProxyVote.com Voting Items Board Recommends V11034-P86067 Prefer to receive an email instead? While voting on www.ProxyVote.com, be sure to click “Delivery Settings”. 1. To elect the three Class I director nominees to hold office until the 2026 Annual Meeting of Stockholders. Nominees: For NOTE: Such other business as may properly come before the meeting or any adjournment thereof. 01) Dr. Jiong Ma 02) Michael Noonen 03) Eric Luo 2. To ratify the appointment of KPMG LLP as our independent registered public accounting firm for the fiscal year ended December 31, 2023. 3. To approve, in a non-binding advisory vote, the compensation of our named executive officers. 4. To approve, in a non-binding advisory vote, the frequency of the advisory stockholder vote on the compensation of our named executive officers. For For 1 Year