Blackbridge Partners Investments Blackbridge Partners, through its affiliated entities invests in established manufacturing, service and distribution companies. Investments are made in companies that expect to achieve high incremental returns on incremental investment within a reasonably short period of time, thereby significantly increasing their valuation. Investments are usually made as subordinated debt or preferred stock. Returns are generated from interest or preferred dividends, and from the appreciation of common stock obtained via warrants. Companies are often clients of Blackbridge Partners.