SHARES in sport television company SuperSport International Holdings gained more than 3% on Monday after it announced it was to acquire a stake in the Natal Rugby Union. By 12:30pm, the share had gained 10 cents or 3,03% to 340 cents in thin volume. SuperSport advised its shareholders in a cautionary notice that the company will acquire a substantial interest in the rugby union subject to a number of conditions, including due diligence.