Clarification on Recent Sale of Shares by SES Management

SES AI Corporation (NYSE: SES), headquartered in Boston, is a global leader in the development and manufacturing of high-performance lithium-metal (Li-Metal) rechargeable batteries for electric vehicles (EVs) and other applications.

SES recently celebrated its 11-year anniversary and its 1-year anniversary since listing on the New York Stock Exchange (NYSE). As a result, a portion of restricted stock units (RSUs) that were granted to management shortly after listing recently vested, creating a tax liability for some officers of the company. After the market closed on May 2, several members of SES management filed Form 4s, which are a statement of change in beneficial ownership in SES, including CEO Qichao Hu. The transactions reported on these Form 4s were carried-out pursuant to an automatic "sell-to-cover" instruction for the applicable withholding taxes on the vested RSUs. Proceeds from the share sales were collected by SES for the sole purpose of covering the aforementioned tax liabilities.

"I have no intention to sell shares in SES and have never sold a single share in SES aside for paying taxes due on vesting RSUs. We continue to make incredible progress on our Li-Metal battery cells and I look forward to providing an update on our business when we report our first quarter earnings after market close on May 8", said Founder and CEO Qichao Hu.

About SES

SES is a global leader in the development and production of high-performance Li-Metal rechargeable batteries for EVs and other applications. Founded in 2012, SES is an integrated Li-Metal battery manufacturer with strong capabilities in material, cell, module, AI-powered safety algorithms and recycling. Formerly known as SolidEnergy Systems, SES is headquartered in Boston and has operations in Singapore, Shanghai, and Seoul.

SES may use its website as a distribution channel of material company information. Financial and other important information regarding SES is routinely posted on and accessible through the SES's website at www.ses.ai. Accordingly, investors should monitor this channel, in addition to following the Company's press releases, Securities and Exchange Commission filings and public conference calls and webcasts. To learn more about SES, please visit: https://investors.ses.ai

Forward-looking statements

All statements other than statements of historical facts contained in this press release are "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995. These forward-looking statements include, without limitation, statements relating to expectations for future financial performance, business strategies or expectations for our business. These statements are based on the beliefs and assumptions of the management of SES. Although SES believes that its plans, intentions and expectations reflected in or suggested by these forward-looking statements are reasonable, it cannot assure you that it will achieve or realize these plans, intentions or expectations. These statements constitute projections, forecasts and forward-looking statements, and are not guarantees of performance. Such statements can be identified by the fact that they do not relate strictly to historical or current facts. When used in this press release, words such as "anticipate", "believe", "can", "continue", "could", "estimate", "expect", "forecast", "intend", "may", "might", "plan", "possible", "potential", "predict", "project", "seek", "should", "strive", "target", "will", "would" and similar expressions may identify forward-looking statements, but the absence of these words does not mean that a statement is not forward-looking.

You should not place undue reliance on these forward-looking statements. Should one or more of a number of known and unknown risks and uncertainties materialize, or should any of our assumptions prove incorrect, our actual results or performance may be materially different from those expressed or implied by these forward-looking statements. Some factors that could cause actual results to differ include, but are not limited to the following: risks related to the development and commercialization of SES's battery technology and the timing and achievement of expected business milestones; risks relating to the uncertainty of achieving and maintaining profitability; risks relating to the uncertainty of meeting future capital requirements; the ability of SES to integrate its products into electric vehicles ("EVs") or electric vertical take-off and landing aircraft ("eVTOLs"); the risk that delays in the pre-manufacturing development of SES's battery cells could adversely affect SES's business and prospects; potential supply chain difficulties; the ability of SES to engage target original equipment manufacturers ("OEMs") customers successfully and integrate SES's products into EVs manufactured by OEM customers; the ability to obtain raw materials, components or equipment through new or existing supply relationships; risks resulting from SES's joint development agreements and other strategic alliances and investments; product liability and other potential litigation, regulation and legal compliance; SES's ability to attract, train and retain highly skilled employees and key personnel; the uncertainty in global economic conditions and risks relating to health epidemics, including the COVID-19 pandemic and any operational interruptions; developments in alternative technology or other fossil fuel alternatives; risks related to SES's intellectual property; business, regulatory, political, operational, financial and economic risks related to SES's business operations outside the United States; SES has identified a material weakness in its internal control over financial reporting and may identify material weaknesses in the future or otherwise fail to develop or maintain an effective system of internal controls; the volatility of SES's common stock and value of SES's public warrants; and the other risks described in "Part I, Item 1A. Risk Factors" in our annual report on Form 10-K for the fiscal year ended December 31, 2022 filed with the Securities and Exchange Commission ("SEC") on March 16, 2023 and other documents filed from time to time with the SEC. There may be additional risks that SES presently knows and/or believes are immaterial that could also cause actual results to differ from those contained in the forward-looking statements. In addition, forward-looking statements reflect SES's expectations, plans or forecasts of future events and views only as of the date of this press release. SES anticipates that subsequent events and developments will cause its assessments to change. However, while SES may elect to update these forward-looking statements at some point in the future, SES specifically disclaims any obligation to do so. These forward-looking statements should not be relied upon as representing SES's assessments as of any date subsequent to the date of this press release.