Not bad business, Celtic paid around £900,000 for him two years ago and sold him today for a fee thought to be approx £12m.
Times journalist Gary Jacob tweeted earlier:
Southampton agreed £12m for Wanyama on Friday, a higher fee but lower wage than offered by Cardiff. Celtic look like they won then
Malky Mackay admitted his bid would have been a record signing for Cardiff and surpassed the previous record Celtic had received for selling a player.
But he's a Southampton player now so we move on.
Source: Cardiff City Online