May 24 (Reuters) - Westpac Banking Corp WBC.AX
* announces BT Investment Management (BTIM) institutional offer
* Westpac banking says fully-underwritten offer of 60 million shares in BT Investment Management to institutional investors
* Offer price range has been set as $10.25 to $10.75 per share
* Following completion of offer, westpac's ownership in btim will reduce from 29% to 10%
* Completion of offer is expected to add approximately 10 basis points to westpac's common equity tier 1 capital ratio
* Westpac banking corp says will sell remaining 10% shareholding in bt investment management in the future Source text for Eikon: ID:nASX3PPPdK Further company coverage: WBC.AX