| Affiliation ID | 1532 |
|---|---|
| Full name | Simklubben Neptun |
| Short name | SK Neptun |
| Place | Stockholm (SWE) |
| Sports | DIV/SWI/WAP |
| Notes | Founded 12 October 1906. The water polo section merged with the water polo section of SoIK Hellas to become PK Hellas/Neptun in 1980. |
| Therèse Alshammar | SWE | SWI | 1996—2016 |
| Cletus Andersson | SWE | WAP | 1924 |
| Gunilla Andersson | SWE | SWI | 1976 |
| Jonas Andersson | SWE | SWI | 2008 |
| Wille Andersson | SWE | SWI/WAP | 1908—1924 |
| Nils Backlund | SWE | WAP | 1920—1924 |
| Lars-Erik Bengtsson | SWE | SWI | 1960 |
| Maud Berglund | SWE | SWI | 1952 |
| Ernst Brandsten | SWE | DIV | 1912 |
| Jane Cederqvist | SWE | SWI | 1960 |
| Olle Dickson | SWE | SWI | 1920 |
| Elina Eggers | SWE | DIV | 2008 |
| Ulla-Britt Eklund | SWE | SWI | 1952 |
| Per-Olof Ericsson | SWE | SWI | 1960 |
| Lester Eriksson | SWE | SWI | 1964—1968 |
| Ingegärd Fredin | SWE | SWI | 1948—1952 |
| Max Gumpel | SWE | SWI/WAP | 1908—1920 |
| Ann-Christine Hagberg | SWE | SWI | 1964 |
| Anita Hellström | SWE | SWI | 1956 |
| Thor Henning | SWE | SWI | 1912—1924 |
| Ragnar Lagergren | SWE | SWI | 1908 |
| Per-Ola Lindberg | SWE | SWI | 1960—1964 |
| Ingegerd Lindfeldt | SWE | SWI | 1952 |
| Elisabeth Ljunggren-Morris | SWE | SWI | 1964—1968 |
| Tore Ljungqvist | SWE | WAP | 1936 |
| Martin Lundén | SWE | SWI | 1948 |
| Hugo Lundevall | SWE | SWI | 1912 |
| Marianne Lundquist | SWE | SWI | 1948—1952 |
| Bengt Nordwall | SWE | SWI | 1960—1964 |
| Gösta Persson | SWE | SWI/WAP | 1924—1936 |
| Helena Peterson | SWE | SWI | 1980 |
| Sven Pettersson | SWE | SWI/WAP | 1928—1936 |
| Runor Sandström | SWE | WAP | 1936 |
| Bibbi Segerström | SWE | SWI | 1960 |
| Simon Sjödin | SWE | SWI | 2008—2016 |
| Arvid Spångberg | SWE | DIV | 1908 |
| Petter Stymne | SWE | SWI | 2008 |
| Tero Välimaa | FIN | SWI | 2000 |
| Anna-Stina Wahlberg-Baidinger | SWE | DIV | 1952—1956 |
| Johan Wallberg | SWE | SWI | 1996—2000 |
| Bengt Wallin | SWE | SWI | 1912 |
| Majvor Welander | SWE | SWI | 1964 |
| Hilmer Wictorin | SWE | WAP | 1924 |
| Gustaf Wretman | SWE | SWI | 1906—1908 |