Microsoft Co-Founder Paul Allen Dies at 65
Microsoft Co-founder Paul Allen (Photo: Vulcan Inc)

Microsoft Co-Founder Paul Allen has died from complications resulting from non-Hodgkin's lymphoma on Monday afternoon. Allen was diagnosed with non-Hodgkin's lymphoma in 2009, more than 25 years after he was treated for Hodgkin's disease.

Soon after the death of the philanthropist, Allen's sister Jody released a statement on behalf of the family, hailing the technologist as a "remarkable individual on every level."

"While most knew Paul Allen as a technologist and philanthropist, for us he was a much loved brother and uncle, and an exceptional friend. Paul's family and friends were blessed to experience his wit, warmth, his generosity and deep concern. For all the demands on his schedule, there was always time for family and friends. At this time of loss and grief for us - and so many others - we are profoundly grateful for the care and concern he demonstrated every day," the statement read.

The 65-year-old, who also founded Vulcan Inc, died in Seattle , a statement from the company noted.

In another statement, Vulcan Inc and the Paul G Allen network hailed Allen's "remarkable intellect and passion" to solve some of the world's most difficult problems, with the conviction that creative thinking and new approaches could make profound and lasting impact.

Through Vulcan, Allen's network of philanthropic efforts and organizations, the Microsoft co-founder supported research in artificial intelligence and new frontier technologies. The group also invested in Seattle's cultural institutions and the revitalization of parts of the city.

Allen founded Microsoft (MSFT) with Bill Gates in 1975, several years after the two met as fellow students at a private school in Seattle. Allen left the company in 1982 after he was diagnosed with Hodgkin's disease. "I am heartbroken by the passing of one of my oldest and dearest friends, Paul Allen," Microsoft founder Bill Gates said in a statement. "Paul was a true partner and dear friend. Personal computing would not have existed without him."

Microsoft's Chief Executive Officer Satya Nadella also mourned the loss of Allen and extended condolences to the latter's family. "Paul Allen's contributions to our company, our industry and to our community are indispensable. As co-founder of Microsoft, in his own quiet and persistent way, he created magical products, experiences and institutions, and in doing so, he changed the world. I have learned so much from him - his inquisitiveness, curiosity and push for high standards is something that will continue to inspire me and all of us at Microsoft. Our hearts are with Paul's family and loved ones. Rest in peace," a statement from Nadella read.

Before his death, he was estimated to be the 46th-richest person in the world, with an estimated net worth of USD 20.2 billion, including 100 million shares of Microsoft.