Company: SION
Filing Date: 2025-02-10
Form Type: 8-K
Source: 0001193125-25-023570
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Company: Sionna Therapeutics, Inc.
Filing Date: 2025-02-10
Form: 8-K
Item: Item 5.03
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Item 5.03 Amendments to Articles of Incorporation or Bylaws.

As previously disclosed in the Registration Statement on FormS-1, as amended (FileNo. 333-284352)(the “ Registration Statement”), of Sionna Therapeutics, Inc. (the “ Company”), and in connection with the completion of the initial public offering of the Company’s common stock (the “ IPO”), the Company filed its fifth amended and restated certificate of incorporation (the “ Amended and Restated Certificate”) with the Secretary of State of the State of Delaware on January 31, 2025. The Company’s board of directors (the “ Board”) and the Company’s stockholders previously approved the Amended and Restated Certificate to be filed in connection with, and to be effective immediately prior to, the completion of the IPO. The Amended and Restated Certificate amends and restates the Company’s existing fourth amended and restated certificate of incorporation, as amended, in its entirety to, among other things: (i) authorize 500,000,000 shares of common stock; (ii) eliminate all references to the previously-existing series of preferred stock; (iii) authorize 10,000,000 shares of undesignated preferred stock that may be issued from time to time by the Board in one or more series; and (iv) eliminate the ability of the Company’s stockholders to take action by written consent in lieu of a meeting and call special meetings of stockholders.