Clear Street Files Registration Statement for Proposed Initial Public Offering

NEW YORK – January 20, 2026 – Clear Street Group Inc. (“Clear Street” or “the Company”), a cloud-native financial infrastructure technology company on a mission to give sophisticated investors access to every asset in every market, today announced that it has filed a registration statement on Form S-1 with the U.S. Securities and Exchange Commission relating to a proposed initial public offering of its Class A common stock. Clear Street intends to apply to list its Class A common stock on the Nasdaq Global Select Market under the ticker symbol “CSIG.” The number of shares to be offered and the price range for the proposed offering have not yet been determined. The offering is subject to market conditions, and there can be no assurance as to whether or when the offering may be completed, or as to the actual size or terms of the offering.

Goldman Sachs & Co. LLC, BofA Securities, Morgan Stanley, UBS Investment Bank and Clear Street LLC will act as lead book-running managers for the proposed offering. The proposed offering will be made only by means of a prospectus. Copies of the preliminary prospectus related to the proposed offering, when available, may be obtained from: Goldman Sachs & Co. LLC, Attention: Prospectus Department, 200 West Street, New York, New York 10282, by telephone: 1-866-471-2526, or by email: prospectus-ny@ny.email.gs.com; BofA Securities, NC1-022-02-25, 201 North Tryon Street, Charlotte, NC 28255-0001, Attention: Prospectus Department, or by email: dg.prospectus_requests@bofa.com; Morgan Stanley & Co. LLC, Attention: Prospectus Department, 180 Varick Street, 2nd Floor, New York, New York 10014, or by email: prospectus@morganstanley.com; UBS Securities LLC, Attention: Prospectus Department, 11 Madison Avenue, New York, NY 10010, by telephone: (888) 827-7275, or by email: ol-prospectus-request@ubs.com; or Clear Street LLC, Attn: Syndicate Department, 150 Greenwich Street, 45th floor, New York, NY 10007, or by email: ecm@clearstreet.io.

A registration statement relating to these securities has been filed with the U.S. Securities and Exchange Commission but has not yet become effective. These securities may not be sold nor may offers to buy be accepted prior to the time the registration statement becomes effective. This press release shall not constitute an offer to sell or the solicitation of an offer to buy these securities, nor shall there be any sale of these securities in any state or jurisdiction in which such an offer, solicitation, or sale would be unlawful prior to registration or qualification under the securities laws of any such state or jurisdiction.