City of Oxford and Osiris both secured a hat-trick of wins to head the local success list at Reading Regatta.
City's three wins came in the women's senior 2 Eights, the men's senior 2 coxless pairs and the women's junior singles, courtesy of National Schools medallist Holly Holden.
Osiris, the Oxford University women's squad, won the Novice Eights on both Saturday and Sunday and the Senior 2 Eights on Sunday.
The latter crew is the Osiris entry for this weekend's Henley Women's Regatta.
Headington School reached three finals but won just one, the women's senior coxed fours.
Headington's two losing finalists, the senior 3 and junior eights, were both beaten by visiting overseas crews.
Radley and Abingdon School had a blank Saturday, although Radley's junior 15 coxed four won their class on Sunday.
Wheatley's world champion Frances Houghton, competes for Britain in this weekend's World Cup in Amsterdam.
Paul Mattick, of Wallingford, is also in action.
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