Huge Volume, page-12

And anyway, according to their announcement to market and this article it looks like MQG acted as broker and on sold 31,244,922 of them and, if I reading the announcement correctly, keeping some for themselves:

"Macquarie's equities desk was in the market with 31.2 million Speedcast shares after market on Thursday, seeking buyers at $5.45 a share.
The shares were priced at a 3.7 per cent discount to their Thursday closing price of $5.66, according to terms sent to fund managers."

Link

So no need to sell, still a good long term hold.