SoftBank would not amass a majority of voting rights, though its stake would increase, the person said. Part of the package may include non-voting preferred stock. Part of the appeal of the SoftBank plan is the office-sharing company's longstanding relationship with the investment behemoth, one of the people said. At the same time it would further dilute existing shareholders and employees – a consideration in favor of the JPMorgan proposal. – With assistance from Claire Boston.