Paul Allen, co-founder of Microsoft, has died from complications of non-Hodgkin’s lymphoma.
Non-Hodgkin’s lymphoma is a form of cancer that starts in white blood cells (lymphocytes), a major part of the body’s immune system.
The 65-year-old had beaten the disease after its first diagnosis in 1983. He was also treated for it in 2009.
Two weeks ago, he announced the cancer’s return, saying he and his doctors were “optimistic” about treatment options.
Bill Gates has released a statement saying he is “heartbroken” over the death of Allen. Gates and Allen co-founded the hugely successful technology powerhouse in 1975.
“I am heartbroken by the passing of one of my oldest and dearest friends… Personal computing would not have existed without him,” Gates said.
“From our early days together at Lakeside School, through our partnership in the creation of Microsoft, to some of our joint philanthropic projects over the years, Paul was a true partner and dear friend.
In a statement on behalf of his family, his sister Jody described Allen as a “remarkable individual on every level”.
“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,” the statement read.
“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.”
Allen was worth an estimated $20 billion and was ranked 44th on Forbes’ 2018 list of billionaires.