* Says filing was withdrawn voluntarily

* To refile report by Dec. 29

* Extends waiting period to buy Diedrich by 2 days (Adds company comments, updates stock movement)

BANGALORE, Dec 24 - Green Mountain Coffee Roasters Inc (GMCR.O) voluntarily withdrew its filing with the antitrust division of the Federal Trade Commission regarding its purchase of Diedrich Coffee Inc (DDRX.O) after consultation with the regulator.

The company will refile the report on or before Dec. 29, it said in a filing with the U.S. Securities and Exchange Commission.

This withdrawal and refiling is being undertaken in order to provide the FTC with additional time to review the information submitted by Green Mountain and Diedrich, the company said.

Consequent to the withdrawal, Green Mountain -- which had beaten Peet's Coffee & Tea Inc (PEET.O) in a bidding war to buy Diedrich -- extended the waiting period to acquire its licensee by two days to Jan. 13.

A spokesperson for Green Mountain declined to give details about its discussions with the FTC.

The company is confident of closing the (Diedrich) transaction in early 2010, the spokesperson told Reuters.

Diedrich is a licensee of Green Mountain's K-cup coffee refills used for the company's single-cup Keurig brewers.

Green Mountain bought Tully's and Timothy's, two of the four Keurig licensees earlier this year.

Shares of the Waterbury, Vermont-based Green Mountain were flat at $72.60 Thursday morning on Nasdaq. (Reporting by Mihir Dalal; Editing by Unnikrishnan Nair)