Metairie-based Upstream Exploration LLC, a property of Highbridge Principal Strategies’ managed funds, has acquired the assets of independent oilfield companies Century Exploration LLC and Century Exploration Houston LLC.

The price was not disclosed.

The newly formed Upstream will keep most of Century Exploration’s Louisiana-based employees. Upstream has 21 employees in its Metairie offices. Upstream will focus on the shallow waters off the coasts of Louisiana and Texas.