World Rankings 2025(as of Sep 1st) Men's 400m Individual Medley 1. 🇫🇷Leon Marchand 4:04.73 2. 🇺🇸Bobby Finke 4:07.46 3. 🇺🇸Carson Foster 4:07.92 4. 🇯🇵Tomoyuki Matsushita 4:08.32 5. 🇷🇺Ilya Borodin 4:09.16 6. 🇯🇵Yumeki Kojima 4:09.38 7. 🇯🇵Asaki Nishikawa 4:09.63