Canadian billionaire Prem Watsa’s Fairfax Financial Holdings has lifted his stake in Atlas Corp by spending $78.7m to exercise warrants.

Atlas, which controls container ship giant Seaspan Crop, revealed the move as it reported a dip in quarterly profits.

The company said Watsa’s Fairfax Financial Holdings exercised warrants in January to purchase 6m shares for prices between $13 and $13.71