Hilary Schneider, the EVP of North America at Yahoo (NSDQ: YHOO), has sold about $1 million worth of company stock in three separate tranches, in a transaction on August 31, according to an SEC document just filed. Likely this is a pre-arranged sale; we’ll have more when we hear back from the company. Meanwhile, in another filing, Yahoo disclosed that Michael Murray its SVP, Finance and Chief Accounting Officer, will leave on September 30, 2009; he has been at this position since Dec 2004. His boss and CFO Blake Jorgensen left earlier this year. This continues the string of top officials to leave Yahoo over the recent months since Carol Bartz joined as CEO.

Update 1: Yahoo PR says it doesn’t comment on its executives’ portfolio decisions.

Update 2: Schneider did some previous sales this summer as well: on Aug 27, she sold $364,747 worth of Yahoo stock, and prior to that, on April 25, she sold another $387,622 in Yahoo shares.