Koor Industries Ltd. (KOR.TV) said Sunday it has increased its stake in Credit Suisse AG (CS) to 2.28%.

Koor, an Israeli holding company with interests mainly in telecommunications, other technological development and manufacturing, has been buying and selling shares of Credit Suisse since July, 2008.

So far, Koor has invested ILS4.96 billion ($1.3 billion) in Koor. It has also realized capital gains of ILS3.2 billion, and said it has unrealized capital gains of ILS418 million on its current stake.

Before this latest purchase, Koor owned 1.9% of Credit Suisse.

At 0900GMT, shares of Koor were up ILS1.10, or 1%, at ILS111.60, in a higher Tel Aviv market.

-By Sara Toth Stub, Contributing to Dow Jones Newswires,