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EXCHANGE COMMISSION**\n\n**Washington,\nD.C. 20549**\n\n \n\n****\n\n**FORM\n10-Q**\n\n \n\n(Mark\nOne)\n\n \n\n☒\nQuarterly\nReport PURSUANT TO Section 13 or 15(d)\nof the Securities Exchange Act of 1934\n\n \n\nFor\nthe quarterly period ended March 31, 2026\n\n \n\nOR\n\n \n\n☐\nTransition\nReport PURSUANT TO Section 13 or 15(d)\nof the Securities Exchange Act of 1934\n\n \n\nFor\nthe transition period from ______________ to ______________\n\n \n\nCommission\nFile Number 001-41488\n\n \n\n**SHUTTLE\nPHARMACEUTICALS HOLDINGS, INC.**\n\n(Exact\nname of registrant as specified in its charter)\n\n \n\n**Delaware**\n \n**82-5089826**\n\n(State\nor other jurisdiction of\n \n(I.R.S.\nEmployer\n\nincorporation\nor organization)\n \nIdentification\nNumber)\n\n \n\n**401\nProfessional Drive, Suite 260**\n\n**Gaithersburg,\nMD 20879**\n\n(Address\nof principal executive offices) (Zip Code)\n\n \n\n**(240)\n403-4212**\n\n(Registrant’s\ntelephone number, including area code)\n\n \n\nN/A\n\n(Former\nname, former address and former fiscal year, if changed since last report)\n\n \n\nSecurities\nregistered pursuant to Section 12(b) of the Act:\n\n \n\n \n\n**Title\nof each class**\n \n**Trading\nSymbol(s)**\n \n**Name\nof each exchange on which registered**\n\nCommon\nStock, par value $0.00001 per share\n \nSHPH\n \nThe\nNasdaq Stock Market LLC\n\n \n\nIndicate\nby check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange\nAct of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2)\nhas been subject to such filing requirements for the past 90 days. Yes ☒ No ☐\n\n \n\nIndicate\nby check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule\n405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant\nwas required to submit such files). Yes ☒ No ☐\n\n \n\nIndicate\nby check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting\ncompany, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,”\n“smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.\n\n \n\n \nLarge\naccelerated filer\n☐\nAccelerated\nfiler\n☐\n\n \nNon-accelerated\nfiler\n☒\nSmaller\nreporting company\n☒\n\n \n \n \nEmerging\ngrowth company\n☒\n\n \n\nIf\nan emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying\nwith any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐\n\n \n\nIndicate\nby check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No ☒\n\n \n\nThe\nnumber of shares outstanding of the registrant’s common stock on May 15, 2026 was 5,851,290.\n\n \n\n \n\n \n\n \n\n \n\n \n\n**Shuttle\nPharmaceuticals Holdings, Inc.**\n\n \n\n**TABLE\nOF CONTENTS**\n\n \n\n \n \nPage\n\n \n[Part I. Financial Information](#Ja_002)"}