EXHIBIT 24.1 POWER OF ATTORNEY Know all by these presents, that the undersigned hereby constitutes and appoints Megan Gates, John Condon, and Caroline Gammill of Mintz, Levin, Cohn, Ferris, Glovsky and Popeo, P.C., and Gregory Mossinghoff and Jennifer K. Moses of G1 Therapeutics, Inc. (the "Company") signing singly, with full power of substitution, the undersigned's true and lawful attorney-in-fact to: (1) execute for and on behalf of the undersigned, forms and authentication documents for EDGAR Filing Access; (2) do and perform any and all acts for and on behalf of the undersigned which may be necessary or desirable to complete and execute any such forms and authentication documents; (3) execute for and on behalf of the undersigned, in the undersigned's capacity as an officer, director and/or 10% shareholder of the Company, Forms 3, 4 and 5 in accordance with Section 16(a) of the Securities Exchange Act of 1934 and the rules thereunder; (4) do and perform any and all acts for and on behalf of the undersigned which may be necessary or desirable to complete and execute any such Form 3, 4 or 5 and timely file such form with the United States Securities and Exchange Commission and any stock exchange or similar authority; and (5) take any other action of any type whatsoever in connection with the foregoing which, in the opinion of such attorney-in-fact, may be of benefit to, in the best interest of, or legally required by, the undersigned, it being understood that the documents executed by such attorney-in-fact, on behalf of the undersigned pursuant to this Power of Attorney, shall be in such form and shall contain such terms and conditions as such attorney-in-fact may approve in such attorney-in-fact's discretion. The undersigned hereby grants to each such attorney-in-fact full power and authority to do and perform any and every act and thing whatsoever requisite, necessary, or proper to be done in the exercise of any of the rights and powers herein granted, as fully to all intents and purposes as the undersigned might or could do if personally present, with full power of substitution or revocation, hereby ratifying and confirming all that such attorney-in-fact, or such attorney-in-fact's substitute or substitutes, shall lawfully do or cause to be done by virtue of this power of attorney and the rights and powers herein granted. The undersigned acknowledges that the foregoing attorneys-in-fact, in serving in such capacity at the request of the undersigned, is not assuming, nor is the Company assuming, any of the undersigned's responsibilities to comply with Section 16 of the Securities Exchange Act of 1934. This Power of Attorney shall remain in full force and effect until the undersigned is no longer required to file Forms 3, 4 and 5 with respect to the undersigned's holdings of and transactions in securities issued by the Company, unless earlier revoked by the undersigned in a signed writing delivered to the foregoing attorneys-in-fact. [Signature page follows} IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be executed this 15th day of May, 2017. /s/ Robert A. Ingram Robert A. Ingram /s/ Kenneth B. Lee Kenneth B. Lee /s/ Douglas Reed Douglas Reed /s/ Clay Thorp Clay Thorp /s/ John Crumpler John Crumpler Hatteras Venture Advisors IV SBIC, LLC /s/ Clay Thorp Clay Thorp Title: Manager Hatteras Venture Partners IV SBIC, LP /s/ Clay Thorp Clay Thorp Title: Manager of GP 68955705v.1
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3 Filing
Thorp Clay Form 3G1 Therapeutics / Clay Thorp ownership change
Filed: 17 May 17, 12:00am