| 1 |
Summer
McIntosh
|
CAN |
3:55.37 |
12/04 |
2025 Toyota U.S. Open Championships
Austin, USA |
| 2 |
Katie
Ledecky
|
USA |
3:59.02 |
04/30 |
2026 Speedo Fort Lauderdale Open
Fort Lauderdale, USA |
| 3 |
Lani
PALLISTER
|
AUS |
3:59.36 |
04/07 |
2026 Australian Open
Gold Coast, AUS |
| 4 |
Li
Bingjie
|
CHN |
4:01.17 |
11/10 |
15th Chinese National Games
Shenzhen, CHN |
| 5 |
Erika
FAIRWEATHER
|
NZL |
4:01.42 |
05/13 |
2026 New Zealand Swimming Championships
Auckland, NZL |
| 6 |
Yang
Peiqi
|
CHN |
4:01.90 |
11/10 |
15th Chinese National Games
Shenzhen, CHN |
| 7 |
Isabel
GOSE
|
GER |
4:02.92 |
04/23 |
2026 German Swimming Championship
Berlin, GER |
| 8 |
Agostina
Hein
|
ARG |
4:02.99 |
05/30 |
2026 Mare Nostrum Swim Tour
Barcelona, ESP |
| 9 |
Maria Fernanda
COSTA
|
BRA |
4:03.12 |
05/18 |
2026 Maria Lenk Trophy
Rio de Janeiro, BRA |
| 10 |
Liu
Yaxin
|
CHN |
4:03.20 |
11/10 |
15th Chinese National Games
Shenzhen, CHN |
| 11 |
Simona
QUADARELLA
|
ITA |
4:03.59 |
04/18 |
2026 Italian Swimming Championship
Riccione, ITA |
| 12 |
Jenna
FORRESTER
|
AUS |
4:04.30 |
06/08 |
2026 Australian Swimming Trials
Sydney, AUS |
| 13 |
Yu
ZIDI
|
CHN |
4:05.05 |
06/18 |
2026 Chinese National Championship
Hangzhou, CHN |
| 14 |
Fan
Yaqi
|
CHN |
4:05.40 |
03/22 |
2026 China Swimming Open
Shenzhen, CHN |
| 15 |
Tang
Muhan
|
CHN |
4:05.51 |
03/22 |
2026 China Swimming Open
Shenzhen, CHN |
| 16 |
Amelia
Weber
|
AUS |
4:05.79 |
06/08 |
2026 Australian Swimming Trials
Sydney, AUS |
| 17 |
Molly
Walker
|
AUS |
4:06.10 |
06/08 |
2026 Australian Swimming Trials
Sydney, AUS |
| 18 |
Kennedi
Dobson
|
USA |
4:06.11 |
06/19 |
2026 TYR Pro Swim Series
Indianapolis, USA |
| 19 |
Freya
Colbert
|
GBR |
4:06.16 |
03/13 |
Edinburgh International 2026
Edinburgh, GBR |
| 20 |
Maya
WERNER
|
GER |
4:06.18 |
04/23 |
2026 German Swimming Championship
Berlin, GER |
| 21 |
Ma
Yonghui
|
CHN |
4:06.19 |
11/10 |
15th Chinese National Games
Shenzhen, CHN |
| 22 |
Ichika
Kajimoto
|
JPN |
4:06.61 |
03/19 |
2026 Japan Swim
Tokyo, JPN |
| 23 |
Eve
THOMAS
|
NZL |
4:06.85 |
05/13 |
2026 New Zealand Swimming Championships
Auckland, NZL |
| 24 |
Linda
Roth
|
GER |
4:06.89 |
05/23 |
AP Race London International 2026
London, GBR |
| 25 |
Emma
Weyant
|
USA |
4:07.03 |
04/30 |
2026 Speedo Fort Lauderdale Open
Fort Lauderdale, USA |
