0001984086 2026-03-06 2026-03-06 0001984086 1 2026-03-06 2026-03-06 0001984086 2 2026-03-06 2026-03-06 0001984086 3 2026-03-06 2026-03-06 0001984086 4 2026-03-06 2026-03-06 0001984086 5 2026-03-06 2026-03-06 0001984086 6 2026-03-06 2026-03-06 iso4217:USD pure S-3 S-3ASR EX-FILING FEES 0001984086 Septerna, Inc. N/A N/A S-3 Septerna, Inc. false Equity Common Stock, par value $0.001 per share true 0.0001381 false Equity Preferred Stock, par value $0.001 per share true 0.0001381 false Debt Debt Securities true 0.0001381 false Equity Warrants true 0.0001381 false Equity Units true 0.0001381 false Equity Common Stock, par value $0.001 per share true 150000000.00 0.0001381 20715.00 150000000.00 20715.00 0.00 0.00 20715.00 1a. The amount to be registered consists of an indeterminate amount of common stock, preferred stock, debt securities, warrants and/or units. There is also being registered hereunder such currently indeterminate number of (i) shares of common stock or other securities of the registrant as may be issued upon conversion of, or in exchange for, convertible or exchangeable debt securities and/or preferred stock registered hereby, or (ii) shares of debt securities, common stock, preferred stock or units as may be issued upon exercise of warrants registered hereby, as the case may be, including under any applicable antidilution provisions. Any securities registered hereunder may be sold separately or together with other securities registered hereunder. Pursuant to Rule 416 under the Securities Act of 1933, as amended (the "Securities Act"), this registration statement on Form S-3ASR (this "Registration Statement") also covers any additional securities that may be offered or issued in connection with any stock split, stock dividend or pursuant to anti-dilution provisions of any of the securities. Separate consideration may or may not be received for securities that are issuable upon conversion, exercise or exchange of other securities. 1b. The proposed maximum offering price per security will be determined from time to time by the registrant in connection with the issuance by the registrant of the securities registered hereunder and is not specified as to each class of security. 1c. Including such indeterminate amount of common stock as may be issued from time to time at indeterminate prices or upon conversion of debt securities and/or preferred stock registered hereby, or upon exercise of warrants registered hereby, as the case may be. 1d. In accordance with Rules 456(b) and 457(r) under the Securities Act, except with respect to any registration fee associated with the primary offering of common stock described in the table in connection with the filing of this Registration Statement, the registrant is deferring payment of all registration fees and will pay the registration fees subsequently in advance or on a "pay-as-you-go" basis. See Notes 1a, 1b and 1d above. 2a. Including such indeterminate amount of preferred stock as may be issued from time to time at indeterminate prices or upon conversion of debt securities and/or preferred stock registered hereby, or upon exercise of warrants registered hereby, as the case may be. See Notes 1a, 1b and 1d above. 3a. Including such indeterminate principal amount of debt securities as may be issued from time to time at indeterminate prices or upon exercise of warrants registered hereby, as the case may be. See Notes 1a, 1b and 1d above. 4a. Warrants may be sold separately or together with any of the securities registered hereby and may be exercisable for shares of common stock, preferred stock, debt securities, or units registered hereby. Because the warrants will provide a right only to purchase such securities offered hereunder, no additional registration fee is required See Notes 1a, 1b and 1d above. 5a. Each unit will be issued under a unit agreement and will represent an interest in two or more securities registered pursuant to this Registration Statement, which may or may not be separable from one another. Because the units will provide a right only to purchase such securities offered hereunder, no additional registration fee is required. See Notes 1a, 1b and 1d above.