Directors at Symphony Environmental Technologies (LON:SYM) have bought shares in the firm worth over £42,000.
Nirj Deva, the chairman, Michael Stephen, deputy chairman, chief executive Michael Laurier and Ian Bristow, finance director, all bought shares.
The biggest purchase was made by chief executive Laurier, who bought 150,000 shares at 9.125p for just shy of £13,700.
He now holds around 15.85% of the firm’s capital.
Symphony Environmental shares added 9.86% on the day, to stand at 9.75p.