| 1 | Seto Daiya | 1994 | JPN | 400 Misti | M | 03'54''81 | 20/12/2019 | 1008 | 2019 ISL Series Finals (Las Vegas, USA) - 1° Day |
| 2 | Atherton Minna | 2000 | AUS | 100 Dorso | F | 00'54''89 | 27/10/2019 | 1007 | 2019 ISL Series (Budapest, HUN) - 2° Day |
| 3 | Dressel Caeleb Remel | 1996 | USA | 50 Stile Libero | M | 00'20''24 | 20/12/2019 | 1002 | 2019 ISL Series Finals (Las Vegas, USA) - 1° Day |
| 4 | Atherton Minna | 2000 | AUS | 200 Dorso | F | 01'59''25 | 23/11/2019 | 999 | 2019 ISL Series (London, GBR) - 1° Day |
| 5 | Ledecky Kathleen | 1997 | USA | 400 Stile Libero | F | 03'54''06 | 06/10/2019 | 998 | 2019 ISL Series (Indianapolis, USA) - 2° Day |
| 6 | Atherton Minna | 2000 | AUS | 100 Dorso | F | 00'55''09 | 21/12/2019 | 996 | 2019 ISL Series Finals (Las Vegas, USA) - 2° Day |
| 7 | Atherton Minna | 2000 | AUS | 100 Dorso | F | 00'55''12 | 27/10/2019 | 995 | 2019 ISL Series (Budapest, HUN) - 2° Day |
| 8 | Atherton Minna | 2000 | AUS | 200 Dorso | F | 01'59''48 | 26/10/2019 | 993 | 2019 ISL Series (Budapest, HUN) - 1° Day |
| 9 | Toussaint Kira Marije | 1994 | NED | 100 Dorso | F | 00'55''17 | 04/12/2019 | 992 | Campionati Europei Vasca Corta (Glasgow, GBR) - 1° Day |
| 10 | Toussaint Kira Marije | 1994 | NED | 50 Dorso | F | 00'25''75 | 07/12/2019 | 990 | Campionati Europei Vasca Corta (Glasgow, GBR) - 4° Day |
| 11 | Kamminga Arno | 1995 | NED | 200 Rana | M | 02'07''18 | 08/03/2020 | 988 | Antwerp Diamond Speedo Race (Olympic Pool Wezenberg, Antwerp, BEL) - 2° Day |
| 12 | Kolesnikov Kliment | 2000 | RUS | 100 Dorso | M | 00'49''09 | 06/12/2019 | 987 | Campionati Europei Vasca Corta (Glasgow, GBR) - 3° Day |
| | Toussaint Kira Marije | 1994 | NED | 100 Dorso | F | 00'55''26 | 04/12/2019 | 987 | Campionati Europei Vasca Corta (Glasgow, GBR) - 1° Day |
| 14 | Toussaint Kira Marije | 1994 | NED | 50 Dorso | F | 00'25''79 | 20/10/2019 | 986 | Martinez Cup 2019 (Amsterdam, NED) - 2° Day |
| | Rapsys Danas | 1995 | LTU | 400 Stile Libero | M | 03'33''20 | 04/12/2019 | 986 | Campionati Europei Vasca Corta (Glasgow, GBR) - 1° Day |
| 16 | Atherton Minna | 2000 | AUS | 100 Dorso | F | 00'55''29 | 24/11/2019 | 985 | 2019 ISL Series (London, GBR) - 2° Day |
| | Shymanovich Ilya | 1994 | BLR | 100 Rana | M | 00'55''89 | 06/12/2019 | 985 | Campionati Europei Vasca Corta (Glasgow, GBR) - 3° Day |
| | Seto Daiya | 1994 | JPN | 200 Farfalla | M | 01'48''77 | 21/12/2019 | 985 | 2019 ISL Series Finals (Las Vegas, USA) - 2° Day |
| 19 | Atherton Minna | 2000 | AUS | 50 Dorso | F | 00'25''81 | 26/10/2019 | 983 | 2019 ISL Series (Budapest, HUN) - 1° Day |
| | Peaty Adam | 1994 | GBR | 100 Rana | M | 00'55''92 | 21/12/2019 | 983 | 2019 ISL Series Finals (Las Vegas, USA) - 2° Day |
