According to sources, BlackBerry refused the offers on the grounds "that a break-up did not servce the interest of all stakeholders, which include employees, customers and suppliers in addition to shareholders."
It was reported earlier this year that BlackBerry had agreed to a $4.7 billion takeover deal by Fairfax Financial, but earlier this week BlackBerry announced CEO Thorsten Heins resignation and $1 billion rescue investment plan from a group of investors.
Both Microsoft and Apple have shown interest in buying intellectual property and patents from BlackBerry, according to Reuters.
The board have also been reported to have been worried about the involvement of foreign investors in fears that scrutiny would come from the Canadian government, sources state.
The specific proposals are currently unknown and all companies involved in offers have declines to comment.
Struggling company BlackBerry confirmed 4,500 job cuts and a huge financial losses of nearly $1 million this year with sales of around 3.7 million smartphones in Q2 down from 6.8 million in Q1.