Adrian Lee, operations director at Big Yellow Group, sold nearly £250,000 in shares in the self-storage firm. He offloaded 123,462 shares at an average price of 196p a share, retaining 889,187 shares or 77 percent of the issued share capital of the company.
In his last big sale of shares, last February, Lee sold 70,000 shares, but made nearly £300,000 when shares sold at 427p a time.
Big Yellow, whose self-storage facilities are located mainly in London and its southern suburbs, has been hit hard by recessionary conditions.
Earlier this month it said occupancy of its storage space fell by 3 percent in the three months ending in September, with trading conditions also tough in the last three months of 2008.
Big Yellow floated on the Alternative Investment Market in 2000 and is now a FTSE-250 constituent.