Mr Langlands, formerly the chief executive and chairman at Wood Group, has been the senior independent non-executive director on the board at Exova since its initial public offering in April this year.
A stock market filing revealed he purchased 50,000 shares in the Edinburgh company this week at £1.925 each, a total of £96,250. That increased his holding in Exova to 140,909 shares, which is worth around £266,000.
Separately, Goals Soccer Centres non-executive Philip Burks paid almost £240,000 for an additional 109,000 shares in the East Kilbride based five-a-side football business.
Mr Burks, who paid 220p per share, now has a holding of 372,478 shares.