The strong earnings, combined with talk of a possible takeover, have sent 360's shares up about 76.5 percent this year.
But it was not to talk about a possible takeover, according to executives.
That is likely to increase speculation of a possible takeover, analysts said.
Sterling also said it was negotiating with several other companies for a possible takeover.
On Wednesday the company said it had been approached about a possible takeover.
Putting more shares in the company's hands could help defend against a possible takeover.
Earlier the stock had gained on rumors of a possible takeover.
Last year, the state began steps toward a possible takeover of the district, despite bitter opposition from system officials.
However, there are others that felt the power vacuum would lead to instability and a possible military takeover.
The stock began to rise before a May 5, 1993, announcement of a possible takeover.