X0508 4 2025-09-29 0 0001938569 Palomino Laboratories Inc. NONE 0001700533 Denbaars Steven 313 BRYANT COURT PALO ALTO, CA 94301 1 0 0 0 0 Common Stock 2025-09-29 4 J 0 1625000 A 1750000 D Warrants 1.50 2025-09-29 4 S 0 125000 1.20 A 2025-09-29 Common Stock 125000 125000 D Per the terms of an Agreement and Plan of Merger, dated September 29, 2025, Palomino Acquisition Co., a subsidiary of Issuer, merged into Rhino Subsidiary Inc. (f/k/a Palomino Laboratories Inc., "Pre-Merger Palomino"). Mr. DenBaars, as a shareholder of Pre-Merger Palomino, received 1,500,000 shares of common stock, par value $0.0001 per share, of Issuer ("Common Stock") in exchange for his Pre-Merger Palomino shares. On September 29, 2025, Issuer closed a private placement offering and, during which, Mr. DenBaars converted his SAFEs into 125,000 Units at a price of $1.20 per Unit. Each Unit consists of one share of the Common Stock and one warrant to purchase one share of Common Stock at an exercise price of $1.50. The warrants expire on the first anniversary of the date the Common Stock is admitted for trading or listed on an Approved Market (as defined in warrant agreement). /s/ Steven Denbaars 2025-10-09