Morgan Sindall CEO John Morgan has purchased £3.2m-worth of additional shares in the company.
Mr Morgan purchased 500,000 shares at £6.40, taking his stake in the business to above 10 per cent.
Shares are currently trading at around £7.12, which is close to the price at which shares were trading at before the EU referendum – around £7.46.
Two financial analysts, Numis and Jefferies, have a target price of £10 for the stock.
Morgan Sindall reported strong half-year results earlier this month, with fit-out increasing operating profit by 11 per cent to £11.5m.