Bengt Enge resigned as chief investment officer of Norges Bank Investment Management, which handles the assets of the 3.1 trillion Norwegian kroner ($552.8 billion) Government Pension Fund-Global, Oslo, NBIM spokeswoman Siv Meisingseth confirmed.
Mr. Enge resigned Friday. He did not give a reason, Ms. Meisingseth said. Attempts to reach Mr. Enge were unsuccessful.
He was named CIO in August 2009 after previously serving as global head of external management at NBIM.
CEO Yngve Slyngstad has taken on CIO duties while a replacement is being sought.