Restricted Stock Partners has acquired Trade Receivable Exchange Inc.

RSP, a unit of Green Drake Capital Corp., New York, runs an electronic trading system for illiquid securities such as restricted stock, warrants and convertibles in public companies.

The RSP trading system was founded in 2005 and now has about 850 members.

Trade Receivable Exchange Inc., Denver, has been running an online auction platform for bankruptcy trade claims.

The T-REX system was founded in 2007 and has about 650 members.

The price of the deal was not immediately available, but RSP says it will move trading of bankruptcy claims onto its Restricted Securities Trading Network system June 16.