The Globe and Mail reports in its Tuesday, March 3, edition that Constellation Software faces pushback from Sabre Corp., its latest target. The Globe's Jameson Berkow writes that on Sunday, Sabre announced a shareholder rights plan after Constellation acquired a 9.7-per-cent interest. The plan restricts anyone from buying more than 15 per cent of Sabre's shares. Constellation requested two board seats from Sabre in early January and aims to own about 25 per cent of the company. Sabre tried to negotiate with Constellation for Damian McKay, CEO of Vela Software Group, to join its board, but talks stalled in late February. "Despite the parties nearing the finish line on the agreement, Constellation abruptly and without explanation broke off several weeks of constructive talks and said that its intentions 'would appear clear with the benefit of time,'" Sabre said. Constellation subsequently withdrew its second director nomination "without providing any explanation or otherwise responding to Sabre's requests to reengage," Sabre said. Sabre said the shareholder rights plan was intended to stop anyone from acquiring control of it on the open market without paying a premium.