| Ogilvy One |
Sports Acrobatics |
London, United Kingdom |
| Ogmore Valley Wheelers Cycling Club |
Cycling |
Wales, United Kingdom |
| Ohakune Squash Rackets Club |
Squash |
Manawatu/Wanganui, New Zealand |
| Ohope International Golf Club |
Gymnastics |
Auckland, New Zealand |
| Old Abbotstonians |
Running |
South East England, United Kingdom |
| Old Actonians R.F.C |
Running |
United Kingdom |
| Old Actonians Squash Club |
Squash |
London, United Kingdom |
| Old Albanians RC |
Running |
South East England, United Kingdom |
| Old Alleynians Rugby |
Running |
London, United Kingdom |
| Old Amplefordians |
Running |
South East England, United Kingdom |
| Old Ashmoleans |
Running |
South East England, United Kingdom |
| Old Beddians |
Running |
North West England, United Kingdom |
| Old Belvedore RFC |
Running |
Leinster, Ireland |
| Old Blues RFC |
Running |
South East England, United Kingdom |
| Old Boys - University Rugby Club |
Running |
Wellington, New Zealand |
