Core Insights - Shuttle Pharmaceuticals Holdings, Inc. has made significant advancements to its molecule.ai platform, enhancing its capabilities in therapeutic discovery and positioning the company as a leader in AI-driven drug development [1][5] Platform Enhancements - The latest release introduces new models that allow users to evaluate, prioritize, and advance therapeutic candidates more effectively, transitioning from fragmented data analysis to a scalable, end-to-end solution for therapeutic development [2] - The platform now features a sophisticated reasoning system that can identify and prioritize relationships between genes and disease pathways, as well as predict compound interactions with specific biological targets, thus improving the evaluation of therapeutic opportunities [3] Autonomous AI Agent System - The company has previewed a next-generation autonomous AI agent system that enables multi-step reasoning and multi-agent orchestration across complex scientific workflows, significantly reducing manual effort and increasing throughput for research teams [4] Strategic Vision - The CEO of Shuttle Pharma emphasized that this release is a meaningful step toward fully autonomous therapeutic discovery, aiming to redefine drug development workflows by integrating reasoning, prediction, and automation into a single platform, which could reduce timelines, lower costs, and increase success probabilities [5] - The company is focused on building a scalable platform that unlocks new therapeutic opportunities, improves development efficiency, and creates long-term value for shareholders [5][6]

As filed with the Securities and Exchange Commission on December 11, 2025 Registration No. 333-291628 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-1 (Amendment No. 1) REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 SHUTTLE PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) David E. Danovitch, Esq. Aaron M. Schleicher, Esq. Sullivan & Worcester LLP 1251 Avenue of the Americas, 19 Floor New York, NY 10020 (212) 660-3060 From time to ...