Rightmove claimed the top spot on the FTSE 250 leaderboard after US investors tried to buy stock following presentations by chairman Scott Forbes and managing director Ed Williams.
The shares climbed 26.25p to 370p.
They jumped from 303.75p at the start of the week.
References: Financial Times 01/12/06 page 42 (FT Markets- London), The Times 01/12/06 page 65 (In the know), The Daily Telegraph 01/12/06 page B7 (The Market), The Independent 01/12/06 page 80 (Main movers)