It’s Official! 230 Park Trades for $1.15 B.

Istithmar has announced the $1.15 billion sale of the former Helmsley Tower at 230 Park Avenue. A partnership between a Goldman Sachs fund and Monday Properties bought the 34-story tower, which Istithmar itself bought in 2005 for $705 million.

The Observer talked with Istithmar CEO David Jackson earlier this year. News of 230 Park’s imminent sale was already out.