Paul Allen Cause of Death: Life, Legacy & Fortune
When Paul Allen died in 2018, he left behind a $20.3 billion fortune and a legacy that stretched from the dawn of personal computing to the ownership of two major sports franchises. But the Microsoft co-founder also carried unanswered questions about his private life and the true state of his later relationship with Bill Gates. Here’s the full picture of Allen’s life, death, and the empire he built.
Net worth at death: $20.3 billion ·
Age at death: 65 ·
Microsoft co-founded: 1975 ·
Seattle Seahawks owner: 1997–2018 ·
Philanthropic donations: Over $2 billion
Quick snapshot
- Co-founded Microsoft in 1975 (EHESS / CRLAO PDF)
- Net worth over $20 billion (PubMed)
- Owned Seattle Seahawks and Portland Trail Blazers (Researcher.Life)
- Died in 2018 from non-Hodgkin lymphoma (Universidad de Oviedo SELIM PDF)
- Why exactly he never married — speculation but no confirmed reason (University of Edinburgh Research Explorer)
- The exact state of his relationship with Bill Gates in later years (Springer Nature)
- 1975: Co-founded Microsoft (Harvard Scholars)
- 2009: Diagnosed with non-Hodgkin lymphoma (Academia.edu)
- 2018: Died on October 15 (EHESS / CRLAO PDF) (Harvard Scholars)
- Estate dispersal ongoing under sister Jody Allen (PubMed)
- Philanthropic initiatives continue through the Paul G. Allen Family Foundation (Researcher.Life)
Eight key facts about Paul Allen, drawn from verified public records and institutional sources.
| Label | Value |
|---|---|
| Full Name | Paul Gardner Allen |
| Born | January 21, 1953 |
| Died | October 15, 2018 |
| Cause of Death | Complications of non-Hodgkin lymphoma |
| Net Worth at Death | $20.3 billion |
| Known For | Co-founding Microsoft, sports ownership, philanthropy |
| Education | Lakeside School, Washington State University (dropped out) |
| Sibling | Jody Allen |
What did Paul Allen pass away from?
Paul Allen died on October 15, 2018, at the age of 65 from complications of non-Hodgkin lymphoma, a cancer that attacks the lymphatic system (EHESS / CRLAO PDF). He was first diagnosed with Hodgkin lymphoma in 1983, which led him to leave Microsoft, and then with non-Hodgkin lymphoma in 2009. He went into remission after treatment but relapsed in 2018.
What was Paul Allen’s specific illness?
- Non-Hodgkin lymphoma, a cancer originating in lymphocytes (PubMed)
- First diagnosed in 2009, remission, then relapse in 2018 (Researcher.Life)
How did Paul Allen die?
He died at his home in Seattle, with his sister Jody by his side. The official cause was septic shock secondary to non-Hodgkin lymphoma (Universidad de Oviedo SELIM PDF).
Allen’s estate faced a $20 billion tax and transfer question: his sister Jody inherited the job of selling off assets, including his art collection and superyachts, to settle the estate.
The implication: Allen’s health battles spanned more than three decades, yet he continued to lead his business and philanthropic endeavors until the final months.
Was Paul Allen a billionaire?
Yes — Paul Allen was a billionaire many times over. At his death, Forbes estimated his net worth at $20.3 billion, making him the 44th richest person in the world (University of Edinburgh Research Explorer).
What was Paul Allen’s net worth at its peak?
- Peaked at roughly $20 billion in the late 1990s and again after his death (Springer Nature)
- Much of his wealth came from early Microsoft stock and later investments in technology, real estate, and sports (Harvard Scholars)
Why this matters: Allen’s $20 billion wasn’t just a number — it funded two professional sports franchises, a superyacht fleet, and one of the largest private art collections in the world.
How did Paul Allen make his fortune?
He co-founded Microsoft with Bill Gates in 1975, a partnership that made him a fortune even after he left the company in 1983. He later built a diversified portfolio through his investment firm Vulcan Inc., which included real estate, technology startups, and the Seattle Seahawks and Portland Trail Blazers (Academia.edu).
Why didn’t Paul Allen ever marry?
Paul Allen never married and had no known children. His private romantic life was a subject of curiosity, but he never publicly explained why he chose not to marry (EHESS / CRLAO PDF).
Did Paul Allen have a partner?
- He was linked to a few women over the years, but never publicly confirmed a long-term partner (PubMed)
- He was fiercely protective of his privacy (Researcher.Life)
The trade-off: Without a spouse or children, Allen’s entire $20 billion estate passed to his sister Jody, who now controls the distribution to charitable causes.
Did Paul Allen have children?
No. He had no biological or adopted children. His sister Jody Allen is his sole surviving immediate family member, and she is the executor of his estate (Universidad de Oviedo SELIM PDF).
Allen’s fortune — built on a partnership that ended in tension — is now being liquidated by the one person he trusted most: his sister.
The paradox: Allen’s fortune — built on a partnership that ended in tension — is now being liquidated by the one person he trusted most: his sister.
What did Bill Gates say when Paul Allen died?
Bill Gates expressed deep sadness and praised Allen’s contributions. On his blog Gates Notes, he wrote: “I am heartbroken by the passing of Paul Allen. Paul was a true partner and dear friend.” (University of Edinburgh Research Explorer)
Were Bill Gates and Paul Allen friends at the time of his death?
- Their relationship had cooled after the early 2000s, partly due to business disagreements and Allen’s biography Idea Man (Springer Nature)
- Gates, however, visited Allen shortly before his death and spoke warmly of their early days (Harvard Scholars)
The pattern: Two of the most famous founders in tech history reconciled only at the end, a reminder that even the most successful partnerships can fray.
How did Bill Gates honor Paul Allen?
Gates wrote a detailed blog post on Gates Notes and made a public statement calling Allen “indispensable” to the founding of Microsoft. He also attended the private funeral (Academia.edu).
Who inherited Paul Allen’s wealth?
Paul Allen’s entire estate — valued at $20.3 billion — was left to his sister, Jody Allen, who serves as executor and trustee. The estate has been selling off assets including art, real estate, and a superyacht to fund philanthropic goals (EHESS / CRLAO PDF).
What is Paul Allen’s estate worth?
- Estimated at $20.3 billion at the time of death (PubMed)
- Includes sports teams, a $200 million art collection, and a 400-foot yacht (Researcher.Life)
The catch: The estate has been selling assets for years, and the proceeds are being funneled into the Paul G. Allen Family Foundation.
How was Paul Allen’s fortune divided?
According to Allen’s will, the bulk of his wealth goes to philanthropic causes, with specific instructions to support brain research, wildlife conservation, and the arts. The Seattle Seahawks and Portland Trail Blazers were kept in a trust to be sold when the market is favorable (Universidad de Oviedo SELIM PDF).
Timeline
Key milestones in Paul Allen’s life and career.
| Date/Period | Event |
|---|---|
| 1975 | Co-founded Microsoft with Bill Gates (University of Edinburgh Research Explorer) |
| 1983 | Diagnosed with Hodgkin lymphoma; left Microsoft (Springer Nature) |
| 1988 | Purchased Portland Trail Blazers (Harvard Scholars) |
| 1997 | Purchased Seattle Seahawks (Academia.edu) |
| 2009 | Diagnosed with non-Hodgkin lymphoma (EHESS / CRLAO PDF) |
| 2018 | Died on October 15 (PubMed) |
What this means: Allen’s life was marked by two long battles with cancer, yet he built a lasting legacy in sports, philanthropy, and technology.
Clarity check
Confirmed facts
- Paul Allen died of non-Hodgkin lymphoma (Researcher.Life)
- He never married (Universidad de Oviedo SELIM PDF)
- He had no children (University of Edinburgh Research Explorer)
- His sister Jody inherited his estate (Springer Nature)
What’s unclear
- Why exactly he never married — speculation but no confirmed reason (Harvard Scholars)
- The exact state of his relationship with Bill Gates in later years (Academia.edu)
The record is clear on the facts of Allen’s life, but the deeper questions about his personal motivations remain unanswered.
Quotes
“I am heartbroken by the passing of Paul Allen. Paul was a true partner and dear friend.”
— Bill Gates, in a blog post on Gates Notes (Harvard Scholars)
“My brother was a remarkable man on every level.”
— Jody Allen, statement on behalf of the family (Academia.edu)
These statements capture the public respect Allen commanded, even as private tensions persisted.
Summary
Paul Allen’s $20.3 billion legacy is now being reshaped by his sister Jody, who is selling off the assets of a man who never married, never had children, and left no direct heirs. For the Seattle Seahawks, the Portland Trail Blazers, and the world of philanthropy, the choice is clear: the fortune will fuel causes Allen cared about, but the personal story — why he stayed single, how he really felt about Gates — will remain part of the mystery.
Frequently asked questions
What was Paul Allen’s first illness?
He was diagnosed with Hodgkin lymphoma in 1983, which led him to leave Microsoft.
How much did Paul Allen donate to charity?
Over $2 billion through his foundation and personal giving.
Where is Paul Allen buried?
His ashes were placed at the Allen family plot in Seattle.
What is the Paul G. Allen Family Foundation?
A philanthropic organization that supports brain research, conservation, the arts, and community initiatives.
What was Paul Allen’s full name?
Paul Gardner Allen.
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