Mon Oct 31, 2011 9:57am EDT
* Cameco extends C$3.75/share hostile bid to Nov. 14
* Rio Tinto has countered at C$4.15/share
Oct 31 (Reuters) - Cameco Corp said on Monday that it has extended its takeover offer for Hathor Exploration to Nov. 14, but Canada's largest uranium miner did not increase its all-cash bid for the small-cap uranium explorer.
Cameco's hostile takeover offer values Hathor at C$520 million ($520 million) and had been set to expire on Oct. 31.
Earlier this month, global mining giant Rio Tinto counterbid C$578 million, or C$4.15 a share, for Hathor, topping Cameco's C$3.75 a share offer. Hathor's board has backed Rio's offer.
At stake is Hathor's large exploration-stage Roughrider project in the uranium-rich Athabasca region of Saskatchewan in Western Canada.
Shares of Hathor have risen about 70 percent since the day before Cameco's offer was first announced. The stock opened down 4 Canadian cents at C$4.55 on Monday on the Toronto Stock Exchange.