By Braden Keith on SwimSwam
World Aquatics has dropped the mixed 400 free relay from the World Aquatics Championships schedule, now fully aligning the programs of the signature World Aquatics event with the Olympic Games.
See the full updated World Aquatics Competition Regulations (February 2026)The event will still be held at the World Junior Swimming Championships.
With the World Championships in the pre-Olympic year being reimagined as a more direct line to the Olympic Games, including World Championship-only qualification pathways in the 50 meter stroke events, the alignment of the schedules will simplify organization. Now the two meets can have matching event lineups, allowing the World Championships to be a better preparation for the Olympic Games.
The mixed 400 free relay was first added for the 2015 World Championships. The United States won in 2015, 2017, and 2019; Australia won in 2022 and 2023; China won in the lightly-attended 2024 championship; and the United States got back on top in 2025 with a relay of Jack Alexy, Patrick Sammon, Kate Douglass, and Torri Huske.
The 2027 World Aquatics Championships will be held in World Aquatics’ new headquarters city of Budapest.
All-Time Medalists, Mixed 400 Free Relay, World Aquatics Championships
Year Gold Silver Bronze 2015 Kazan United States (USA) Ryan Lochte Nathan Adrian Simone Manuel Missy Franklin Conor Dwyer* Margo Geer* Abbey Weitzeil* Netherlands (NED) Sebastiaan Verschuren Joost Reijns Ranomi Kromowidjojo Femke Heemskerk Kyle Stolk* Marrit Steenbergen* Canada (CAN) Santo Condorelli Yuri Kisil Chantal Van Landeghem Sandrine Mainville Karl Krug* Victoria Poon* 2017 Budapest United States (USA) Caeleb Dressel Nathan Adrian Mallory Comerford Simone Manuel Blake Pieroni* Townley Haas* Lia Neal* Kelsi Worrell* Netherlands (NED) Ben Schwietert Kyle Stolk Femke Heemskerk Ranomi Kromowidjojo Maud van der Meer* Canada (CAN) Yuri Kisil Javier Acevedo Chantal Van Landeghem Penny Oleksiak Markus Thormeyer* Sandrine Mainville* 2019 Gwangju United States (USA) Caeleb Dressel Zach Apple Mallory Comerford Simone Manuel Blake Pieroni* Nathan Adrian* Katie McLaughlin* Abbey Weitzeil* Australia (AUS) Kyle Chalmers Clyde Lewis Emma McKeon Bronte Campbell Cameron McEvoy* Alexander Graham* Brianna Throssell* Madison Wilson* France (FRA) Clément Mignon Mehdy Metella Charlotte Bonnet Marie Wattel Maxime Grousset* Béryl Gastaldello* 2022 Budapest Australia (AUS) Jack Cartwright Kyle Chalmers Madison Wilson Mollie O’Callaghan Zac Incerti* William Yang* Meg Harris* Leah Neale* Canada (CAN) Joshua Liendo Javier Acevedo Kayla Sanchez Penny Oleksiak Ruslan Gaziev* Taylor Ruck* Maggie Mac Neil* United States (USA) Ryan Held Brooks Curry Torri Huske Claire Curzan Drew Kibler* Erika Brown* Kate Douglass* 2023 Fukuoka Australia (AUS) Jack Cartwright Kyle Chalmers Shayna Jack Mollie O’Callaghan Flynn Southam* Madison Wilson* Meg Harris* United States (USA) Jack Alexy Matt King Abbey Weitzeil Kate Douglass Chris Guiliano* Olivia Smoliga* Bella Sims* Great Britain (GBR) Matthew Richards Duncan Scott Anna Hopkin Freya Anderson Jacob Whittle* Tom Dean* Lucy Hope* 2024 Doha China (CHN) Pan Zhanle Wang Haoyu Li Bingjie Yu Yiting Ji Xinjie* Ai Yanhan* Australia (AUS) Kai Taylor Jack Cartwright Shayna Jack Brianna Throssell Alexandria Perkins* Abbey Harkin* United States (USA) Hunter Armstrong Matt King Claire Curzan Kate Douglass Luke Hobson* Jack Aikins* Addison Sauickie* Kayla Han* 2025 Singapore United States (USA) Jack Alexy Patrick Sammon Kate Douglass Torri Huske Chris Guiliano* Jonny Kulow* Simone Manuel* Neutral Athletes B (NAB) Egor Kornev Ivan Giryov Daria Trofimova Daria Klepikova Vladislav Grinev* Alina Gaifutdinova* Milana Stepanova* France (FRA) Maxime Grousset Yann Le Goff Marie Wattel Béryl Gastaldello Rafael Fente-Damers* Albane Cachot**Swimmers who participated in the heats only.
Above table courtesy: Wikipedia
Short Course Worlds
World Aquatics has also altered the relay event lineup at the Short Course World Championships.
Previously, the 200, 400, and 800 free relays, plus the 200 and 400 medley relays, were swum for each sex, with a mixed 200 free and mixed 200 medley relay.
Now that lineup will more closely mirror the Olympics as well, though not exactly. Both men and women will swim separate 400 and 800 free relays, plus a 400 medley relay. The mixed events will be the 200 free and 200 medley relays and the 400 medley relay.
That means no more separated 200 meter events by sex, and an additional mixed medley relay. While the 200 meter men’s and women’s races remained in the official rulebook last year, they were not actually contested at the 2024 World Short Course Championships.
In 2022, Australia won the men’s 200 free relay, Italy won the men’s 200 medley relay, the United States won the women’s 200 free relay, and Australia won the women’s 200 medley relay.
The 2026 World Short Course Championships will be held in Beijing, China.
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