UPDATE 4-Elliott urges Polycom-Mitel merger after disclosing stakes
* Elliott discloses 6.6 pct stake in Polycom; 9.6 pct in Mitel
* Says has stake in ShoreTel
* Polycom's shares up 16.3 pct; ShoreTel up 4.3 pct
* Mitel's U.S.-listed stock up 17 pct (Adds Polycom's response; updates shares)
By Abhirup Roy
Oct 8 (Reuters) - Activist hedge fund Elliott Management Corp disclosed stakes in U.S. video-conferencing equipment maker Polycom Inc and Canadian telecoms provider Mitel Networks Corp and pushed for a combination of the two.
Polycom's shares were up about 16 percent at $13.27 in afternoon trading on Thursday, while Mitel's U.S.-listed stock were up 17 percent at $8.22. Mitel's Toronto-listed shares were up 16 percent at C$10.66.
"Polycom must initiate a comprehensive review of all strategic options, and the time for that review is now," Elliott said in a letter to the company's board.
Elliott said it would be willing to provide financing for Polycom's acquisitions. Continued...