Information
Calendar
| # | Date | Track / Event | Winner(s) | Car | Results |
|---|---|---|---|---|---|
| 01 | 1925/??/?? | Assen (NLD) | Arie Wuring | Race | |
| 02 | 1926/??/?? | Assen (NLD) | Gerard Dieters | Race | |
| 03 | 1927/??/?? | Assen (NLD) | No driver finished the race. | ||
| 04 | 1928/??/?? | Assen (NLD) | Syd Crabtree | Race | |
| 05 | 1929/??/?? | Assen (NLD) | Walter Handley | Race | |
| 06 | 1930/??/?? | Assen (NLD) | Arthur Geiss | Race | |
| 07 | 1931/??/?? | Assen (NLD) | H.G. Tyrell-Smith | Race | |
| 08 | 1932/??/?? | Assen (NLD) | Ted Mellors | Race | |
| 09 | 1933/??/?? | Assen (NLD) | Ted Mellors | Race | |
| 10 | 1934/06/23 | Assen (NLD) | Walfried Winkler | DKW | Race |
| 11 | 1935/??/?? | Assen (NLD) | Walfried Winkler | Race | |
| 12 | 1936/??/?? | Assen (NLD) | Arthur Geiss | Race | |
| 13 | 1937/??/?? | Assen (NLD) | Walfried Winkler | Race | |
| 14 | 1938/??/?? | Assen (NLD) | Ewald Kluge | Race | |
| 15 | 1939/??/?? | Assen (NLD) | Ewald Kluge | Race | |
| 16 | 1946/??/?? | Assen (NLD) | Lo Simons | Race | |
| 17 | 1952/??/?? | Assen (NLD) | Enrico Lorenzetti | Race | |
| 18 | 1953/??/?? | Assen (NLD) | Werner Haas | Race | |
| 19 | 1954/??/?? | Assen (NLD) | Werner Haas | Race | |
| 20 | 1955/??/?? | Assen (NLD) | Luigi Taveri | Race | |
| 21 | 1956/??/?? | Assen (NLD) | Carlo Ubbiali | Race | |
| 22 | 1957/??/?? | Assen (NLD) | Tarquinio Provini | Race | |
| 23 | 1958/??/?? | Assen (NLD) | Tarquinio Provini | Race | |
| 24 | 1959/??/?? | Assen (NLD) | Tarquinio Provini | Race | |
| 25 | 1960/??/?? | Assen (NLD) | Carlo Ubbiali | Race | |
| 26 | 1961/??/?? | Assen (NLD) | Mike Hailwwod | Race | |
| 27 | 1962/??/?? | Assen (NLD) | Jim Redman | Race | |
| 28 | 1963/??/?? | Assen (NLD) | Jim Redman | Race | |
| 29 | 1964/??/?? | Assen (NLD) | Jim Redman | Race | |
| 30 | 1965/??/?? | Assen (NLD) | Phil Read | Race | |
| 31 | 1966/??/?? | Assen (NLD) | Mike Hailwood | Race | |
| 32 | 1967/??/?? | Assen (NLD) | Mike Hailwood | Race | |
| 33 | 1968/??/?? | Assen (NLD) | Bill Ivy | Race | |
| 34 | 1969/??/?? | Assen (NLD) | Renzo Pasolini | Race | |
| 35 | 1970/06/27 | Assen (NLD) | Rodney Gould | Yamaha | Race |
| 36 | 1971/??/?? | Assen (NLD) | Phil Read | Race | |
| 37 | 1972/??/?? | Assen (NLD) | Rodney Gould | Race | |
| 38 | 1973/??/?? | Assen (NLD) | Dieter Braun | Race | |
| 39 | 1974/??/?? | Assen (NLD) | Walter Villa | Race | |
| 40 | 1975/??/?? | Assen (NLD) | Walter Villa | Race | |
| 41 | 1976/??/?? | Assen (NLD) | Walter Villa | Race | |
| 42 | 1977/??/?? | Assen (NLD) | Mick Grant | Race | |
| 43 | 1978/??/?? | Assen (NLD) | Kenny Roberts | Race | |
| 44 | 1979/??/?? | Assen (NLD) | Graziano Rossi | Race | |
| 45 | 1980/??/?? | Assen (NLD) | Carlos Lavado | Race | |
| 46 | 1981/??/?? | Assen (NLD) | Anton Mang | Race | |
| 47 | 1982/??/?? | Assen (NLD) | Anton Mang | Race | |
| 48 | 1983/??/?? | Assen (NLD) | Carlos Lavado | Race | |
| 49 | 1984/??/?? | Assen (NLD) | Carlos Lavado | Race | |
| 50 | 1985/??/?? | Assen (NLD) | Freddie Spencer | Race | |
| 51 | 1986/??/?? | Assen (NLD) | Carlos Lavado | Race | |
| 52 | 1987/??/?? | Assen (NLD) | Anton Mang | Race | |
| 53 | 1988/??/?? | Assen (NLD) | Juan Garriga | Race | |
| 54 | 1989/06/24 | Assen (NLD) | Reinhold Roth | Honda | Race |
| 55 | 1990/06/30 | Assen (NLD) | John Kocinski | Yamaha | Race |
| 56 | 1991/06/29 | Assen (NLD) | Pierfrancesco Chili | Aprilia | Race |
| 57 | 1992/06/27 | Assen (NLD) | Pierfrancesco Chili | Aprilia | Race |
| 58 | 1993/06/26 | Assen (NLD) | Loris Capirossi | Honda | Race |
| 59 | 1994/06/35 | Assen (NLD) | Max Biaggi | Aprilia | Race |
| 60 | 1995/06/24 | Assen (NED) | Max Biaggi | Aprilia | Race |
| 61 | 1996/06/29 | Assen (NLD) | Ralf Waldmann | Honda | Race |
| 62 | 1997/06/28 | Assen (NLD) | Tetsuya Harada | Aprilia | Race |
| 63 | 1998/06/27 | Assen (NLD) | Valentino Rossi | Aprilia | Race |
| 64 | 1999/06/26 | Assen (NLD) | Loris Capirossi | Honda | Race |
| 65 | 2000/06/24 | Assen (NLD) | Tohru Ukawa | Honda | Race |
| 66 | 2001/06/30 | Assen (NLD) | Jeremy McWilliams | Aprilia | Race |
| 67 | 2002/06/28 | Assen (NLD) | Marco Melandri | Aprilia | Race |
| 68 | 2003/06/28 | Assen (NLD) | Anthony West | Aprilia | Race |
| 69 | 2004/06/26 | Assen (NLD) | Sebastián Porto | Aprilia | Race |
| 70 | 2005/06/25 | Assen (NLD) | Sebastián Porto | Aprilia | Race |
| 71 | 2006/06/24 | Assen (NLD) | Jorge Lorenzo | Aprilia | Race |
| 72 | 2007/06/30 | Assen (NLD) | Jorge Lorenzo | Aprilia | Race |
| 73 | 2008/06/28 | Assen (NLD) | Alvaro Bautista | Aprilia | Race |
| 74 | 2009/06/27 | Assen (NLD) | Hiroshi Aoyama | Honda | Race |