0001599298 2026-06-01 2026-06-01 0001599298 1 2026-06-01 2026-06-01 0001599298 2 2026-06-01 2026-06-01 0001599298 3 2026-06-01 2026-06-01 0001599298 4 2026-06-01 2026-06-01 0001599298 5 2026-06-01 2026-06-01 0001599298 6 2026-06-01 2026-06-01 0001599298 7 2026-06-01 2026-06-01 iso4217:USD pure S-3 S-3ASR EX-FILING FEES 0001599298 Summit Therapeutics Inc. N/A N/A S-3 Summit Therapeutics Inc. false Equity Common Stock, par value $0.01 per share true 0.0001381 false Equity Preferred Stock, par value $0.01 per share true 0.0001381 false Debt Debt Securities true 0.0001381 false Other Depositary Shares true 0.0001381 false Other Warrants true 0.0001381 false Other Subscription Rights true 0.0001381 false Other Units true 0.0001381 0.00 0.00 0.00 0.00 0.00 (1) The securities registered hereunder include such indeterminate number of (a) shares of common stock, (b) shares of preferred stock, (c) debt securities, (d) depositary shares, (e) warrants to purchase common stock, preferred stock, debt securities, depositary shares, or units consisting of some or all of these securities, (f) subscription rights to purchase common stock, preferred stock, debt securities, depositary shares, warrants, or units consisting of some or all of these securities, and (g) units consisting of two or more of these securities, as may be sold from time to time by the registrant. There are also being registered hereunder an indeterminate number of shares of common stock and preferred stock as shall be issuable upon conversion, exchange or exercise of any securities that provide for such issuance. In addition, pursuant to Rule 416 under the Securities Act of 1933, as amended (the "Securities Act"), the shares being registered hereunder include such indeterminate number of shares of common stock and preferred stock as may be issuable with respect to the shares being registered hereunder as a result of stock splits, stock dividends or similar transactions. (2) The proposed maximum per security and aggregate offering prices per class of securities 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. Separate consideration may or may not be received for securities that are issuable on exercise, conversion or exchange of other securities. (3) The registrant is relying on Rules 456(b) and 457(r) under the Securities Act to defer payment of the entire registration fee. In connection with the securities offered hereby, the registrant will pay "pay-as-you-go registration fees" in accordance with Rule 456(b) under the Securities Act. The registrant will calculate the registration fee applicable to an offer of securities pursuant to this registration statement based on the fee rate in effect on the date of such fee payment. (1) The securities registered hereunder include such indeterminate number of (a) shares of common stock, (b) shares of preferred stock, (c) debt securities, (d) depositary shares, (e) warrants to purchase common stock, preferred stock, debt securities, depositary shares, or units consisting of some or all of these securities, (f) subscription rights to purchase common stock, preferred stock, debt securities, depositary shares, warrants, or units consisting of some or all of these securities, and (g) units consisting of two or more of these securities, as may be sold from time to time by the registrant. There are also being registered hereunder an indeterminate number of shares of common stock and preferred stock as shall be issuable upon conversion, exchange or exercise of any securities that provide for such issuance. In addition, pursuant to Rule 416 under the Securities Act of 1933, as amended (the "Securities Act"), the shares being registered hereunder include such indeterminate number of shares of common stock and preferred stock as may be issuable with respect to the shares being registered hereunder as a result of stock splits, stock dividends or similar transactions. (2) The proposed maximum per security and aggregate offering prices per class of securities 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. Separate consideration may or may not be received for securities that are issuable on exercise, conversion or exchange of other securities. (3) The registrant is relying on Rules 456(b) and 457(r) under the Securities Act to defer payment of the entire registration fee. In connection with the securities offered hereby, the registrant will pay "pay-as-you-go registration fees" in accordance with Rule 456(b) under the Securities Act. The registrant will calculate the registration fee applicable to an offer of securities pursuant to this registration statement based on the fee rate in effect on the date of such fee payment. (1) The securities registered hereunder include such indeterminate number of (a) shares of common stock, (b) shares of preferred stock, (c) debt securities, (d) depositary shares, (e) warrants to purchase common stock, preferred stock, debt securities, depositary shares, or units consisting of some or all of these securities, (f) subscription rights to purchase common stock, preferred stock, debt securities, depositary shares, warrants, or units consisting of some or all of these securities, and (g) units consisting of two or more of these securities, as may be sold from time to time by the registrant. There are also being registered hereunder an indeterminate number of shares of common stock and preferred stock as shall be issuable upon conversion, exchange or exercise of any securities that provide for such issuance. In addition, pursuant to Rule 416 under the Securities Act of 1933, as amended (the "Securities Act"), the shares being registered hereunder include such indeterminate number of shares of common stock and preferred stock as may be issuable with respect to the shares being registered hereunder as a result of stock splits, stock dividends or similar transactions. (2) The proposed maximum per security and aggregate offering prices per class of securities 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. Separate consideration may or may not be received for securities that are issuable on exercise, conversion or exchange of other securities. (3) The registrant is relying on Rules 456(b) and 457(r) under the Securities Act to defer payment of the entire registration fee. In connection with the securities offered hereby, the registrant will pay "pay-as-you-go registration fees" in accordance with Rule 456(b) under the Securities Act. The registrant will calculate the registration fee applicable to an offer of securities pursuant to this registration statement based on the fee rate in effect on the date of such fee payment. (1) The securities registered hereunder include such indeterminate number of (a) shares of common stock, (b) shares of preferred stock, (c) debt securities, (d) depositary shares, (e) warrants to purchase common stock, preferred stock, debt securities, depositary shares, or units consisting of some or all of these securities, (f) subscription rights to purchase common stock, preferred stock, debt securities, depositary shares, warrants, or units consisting of some or all of these securities, and (g) units consisting of two or more of these securities, as may be sold from time to time by the registrant. There are also being registered hereunder an indeterminate number of shares of common stock and preferred stock as shall be issuable upon conversion, exchange or exercise of any securities that provide for such issuance. In addition, pursuant to Rule 416 under the Securities Act of 1933, as amended (the "Securities Act"), the shares being registered hereunder include such indeterminate number of shares of common stock and preferred stock as may be issuable with respect to the shares being registered hereunder as a result of stock splits, stock dividends or similar transactions. (2) The proposed maximum per security and aggregate offering prices per class of securities 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. Separate consideration may or may not be received for securities that are issuable on exercise, conversion or exchange of other securities. (3) The registrant is relying on Rules 456(b) and 457(r) under the Securities Act to defer payment of the entire registration fee. In connection with the securities offered hereby, the registrant will pay "pay-as-you-go registration fees" in accordance with Rule 456(b) under the Securities Act. The registrant will calculate the registration fee applicable to an offer of securities pursuant to this registration statement based on the fee rate in effect on the date of such fee payment. (1) The securities registered hereunder include such indeterminate number of (a) shares of common stock, (b) shares of preferred stock, (c) debt securities, (d) depositary shares, (e) warrants to purchase common stock, preferred stock, debt securities, depositary shares, or units consisting of some or all of these securities, (f) subscription rights to purchase common stock, preferred stock, debt securities, depositary shares, warrants, or units consisting of some or all of these securities, and (g) units consisting of two or more of these securities, as may be sold from time to time by the registrant. There are also being registered hereunder an indeterminate number of shares of common stock and preferred stock as shall be issuable upon conversion, exchange or exercise of any securities that provide for such issuance. In addition, pursuant to Rule 416 under the Securities Act of 1933, as amended (the "Securities Act"), the shares being registered hereunder include such indeterminate number of shares of common stock and preferred stock as may be issuable with respect to the shares being registered hereunder as a result of stock splits, stock dividends or similar transactions. (2) The proposed maximum per security and aggregate offering prices per class of securities 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. Separate consideration may or may not be received for securities that are issuable on exercise, conversion or exchange of other securities. (3) The registrant is relying on Rules 456(b) and 457(r) under the Securities Act to defer payment of the entire registration fee. In connection with the securities offered hereby, the registrant will pay "pay-as-you-go registration fees" in accordance with Rule 456(b) under the Securities Act. The registrant will calculate the registration fee applicable to an offer of securities pursuant to this registration statement based on the fee rate in effect on the date of such fee payment. (1) The securities registered hereunder include such indeterminate number of (a) shares of common stock, (b) shares of preferred stock, (c) debt securities, (d) depositary shares, (e) warrants to purchase common stock, preferred stock, debt securities, depositary shares, or units consisting of some or all of these securities, (f) subscription rights to purchase common stock, preferred stock, debt securities, depositary shares, warrants, or units consisting of some or all of these securities, and (g) units consisting of two or more of these securities, as may be sold from time to time by the registrant. There are also being registered hereunder an indeterminate number of shares of common stock and preferred stock as shall be issuable upon conversion, exchange or exercise of any securities that provide for such issuance. In addition, pursuant to Rule 416 under the Securities Act of 1933, as amended (the "Securities Act"), the shares being registered hereunder include such indeterminate number of shares of common stock and preferred stock as may be issuable with respect to the shares being registered hereunder as a result of stock splits, stock dividends or similar transactions. (2) The proposed maximum per security and aggregate offering prices per class of securities 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. Separate consideration may or may not be received for securities that are issuable on exercise, conversion or exchange of other securities. (3) The registrant is relying on Rules 456(b) and 457(r) under the Securities Act to defer payment of the entire registration fee. In connection with the securities offered hereby, the registrant will pay "pay-as-you-go registration fees" in accordance with Rule 456(b) under the Securities Act. The registrant will calculate the registration fee applicable to an offer of securities pursuant to this registration statement based on the fee rate in effect on the date of such fee payment. (1) The securities registered hereunder include such indeterminate number of (a) shares of common stock, (b) shares of preferred stock, (c) debt securities, (d) depositary shares, (e) warrants to purchase common stock, preferred stock, debt securities, depositary shares, or units consisting of some or all of these securities, (f) subscription rights to purchase common stock, preferred stock, debt securities, depositary shares, warrants, or units consisting of some or all of these securities, and (g) units consisting of two or more of these securities, as may be sold from time to time by the registrant. There are also being registered hereunder an indeterminate number of shares of common stock and preferred stock as shall be issuable upon conversion, exchange or exercise of any securities that provide for such issuance. In addition, pursuant to Rule 416 under the Securities Act of 1933, as amended (the "Securities Act"), the shares being registered hereunder include such indeterminate number of shares of common stock and preferred stock as may be issuable with respect to the shares being registered hereunder as a result of stock splits, stock dividends or similar transactions. (2) The proposed maximum per security and aggregate offering prices per class of securities 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. Separate consideration may or may not be received for securities that are issuable on exercise, conversion or exchange of other securities. (3) The registrant is relying on Rules 456(b) and 457(r) under the Securities Act to defer payment of the entire registration fee. In connection with the securities offered hereby, the registrant will pay "pay-as-you-go registration fees" in accordance with Rule 456(b) under the Securities Act. The registrant will calculate the registration fee applicable to an offer of securities pursuant to this registration statement based on the fee rate in effect on the date of such fee payment.