Shuttle Pharma Completes 1-for-10 Reverse Stock Split

Key Highlights

• Shuttle Pharmaceuticals Holdings, Inc. effected a one-for-ten (1:10) reverse stock split.
• The reverse stock split became effective at the start of trading on June 11, 2026.
• Stockholders approved the Board's authority for a reverse split ratio from 1:2 to 1:150 at the May 21, 2026 annual meeting.
• The Board approved the 1:10 ratio on June 1, 2026, and filed the amendment on June 10, 2026.
• No fractional shares were issued; stockholders received one full share in lieu of fractional shares.
• The reverse split reduced shares issuable from outstanding warrants, RSUs, and convertible preferred stock proportionally.
• The exercise/conversion prices of convertible securities increased proportionately.
• The total number of authorized shares of common and preferred stock did not change.
• The new CUSIP number for the common stock is 825693500.