NEW YORK (CNN/Money) - AOL Time Warner is close to signing former USA Interactive executive Jon Miller as chief executive of the company's America Online division, a newspaper reported Wednesday.

An agreement has not been finalized and is unlikely before the end of this week, the Wall Street Journal reported. AOL Time Warner is the parent of CNN, CNN/Money, Time magazine and Warner Bros. studios.

AOL Time Warner (AOL: down $1.02 to $11.38, Research, Estimates) spokeswoman Tricia Primrose declined comment on the matter to CNN/Money Wednesday.

Separately, AOL Time Warner acknowledged Wednesday that it is cooperating with investigations into its accounting methods by the Department of Justice and the Securities and Exchange Commission.

Shares of AOL Time Warner slipped $1.18 to $11.22 in afternoon trading Wednesday.

The top spot at the media conglomerate's America Online unit has been vacant since April, when Barry Schuler resigned. Robert Pittman, the company's chief operating officer, assumed control of the unit in an effort to revive it. AOL has been struggling with a weak advertising market and sluggish subscriber growth.

Pittman resigned from the company two weeks ago, prompting a management shakeup that led to the promotion of Jeff Bewkes and Don Logan, two veteran Time Warner executives.