Last updated 7/1/2026

Paul AllenNet Worth Estimate

Historical Wealth Estimate$19.5B - $21.5B$19,500,000,000 - $21,500,000,000(2018 USD)

Paul Allen's net worth at his death in October 2018 is best estimated at about $20 billion, with a base range of $19.5 billion to $21.5 billion in 2018 dollars.

Image: Miles HarrisCreative Commons Attribution-Share Alike 3.0

Historical Basis

Source-Era Wealth

Valuation2018

Original Range$19.5B - $21.5B

Drivers

Wealth Breakdown

8 reviewed sources4 high-quality sources

Wealth composition$20,300,000,0003 sources

External wealth estimate1 input · 3 sources · 78/100 confidenceIncluded$20,300,000,000

Not Counted Directly

PhilanthropyContext only · $2,000,000,000Art collectionContext only · $1,500,000,000Luxury assetsContext only · $250,000,000

Estimate

Current Assessment

Allen's fortune came primarily from co-founding Microsoft and retaining a large stake after leaving day-to-day work. The best public wealth anchor is Forbes' reported estimate of $20.3 billion at the time of his death. That figure is supported by the known scale of his assets, including the Seattle Seahawks, Portland Trail Blazers, Vulcan investments, real estate, art, and other holdings. Later sales, including the record auction of his art collection, show the estate's scale but are not added separately to the 2018 estimate.

Key caveats

The estimate is a historical 2018 valuation, not a current net worth.
Detailed estate records, liabilities, and final tax treatment were not found in public sources.
Posthumous asset sales are context, not direct additions to the death-date figure.

Evidence gaps

Exact Microsoft shares held at death
Full private portfolio valuation
Estate liabilities and tax obligations

Confidence

Medium confidence

72/100

The estimate is supported by available evidence, with meaningful assumptions and caveats.

Key Evidence Gaps

Direct Forbes 2018 profile or Forbes 400 archive text for Paul Allen's $20.3 billion estimate.
Primary estate, probate, or tax filing showing gross estate, deductions, liabilities, or charitable transfers.
Death-date Microsoft share balance or SEC/estate-backed reconstruction of public holdings near October 15, 2018.
Valuation support for private Vulcan holdings, real estate, sports franchises, and other non-public assets as of October 2018.
Evidence of secured debt or other liabilities not already reflected in Forbes-style net-worth estimates.

Public Caveats

This is a historical estimate of Paul Allen's net worth at his death in October 2018, stated in nominal 2018 USD.
The main valuation anchor is a Forbes-reported death-date estimate that was not directly captured from the Forbes page in the supplied artifacts.
Detailed estate records, liabilities, tax treatment, and final Microsoft shareholdings were not available in the supplied evidence.
Posthumous asset sales, including the 2022 art auction, are used only as context and are not added to the 2018 estimate.

Range Model

Scenario Spread

Conservative

$18.5B - $20.3B

Base

$19.5B - $21.5B

Aggressive

$21.5B - $24.0B

Uncertainty Drivers

The full estate valuation, probate/tax filings, and liability schedule were not found in public sources.
The exact number and value of Microsoft shares Allen held at death were not verified through a 2018 filing.
Private investments, real estate, and venture holdings were substantial but not transparently valued.
Sports franchise values can differ materially from published estimates depending on control premiums and sale timing.
Posthumous art-sale proceeds occurred in 2022 and may not equal 2018 fair market value.

Evidence

Reviewed Signals

Signal	Value	Confidence
Luxury marine asset The Octopus superyacht was a high-value personal asset reported around $250 million.	$250,000,000	62/100
Lifetime philanthropy Large lifetime giving indicates that gross founder gains exceeded retained death-date net worth and that charitable commitments materially shaped the estate.	$2,000,000,000	76/100
Art collection Allen's art collection produced a record-setting posthumous auction exceeding $1.5 billion.	$1,500,000,000	78/100
Sports franchises and Vulcan holdings Ownership of the Seahawks, Trail Blazers, and a broad Vulcan investment platform supports a multibillion-dollar estate beyond Microsoft stock.	Owned Seattle Seahawks and Portland Trail Blazers; Vulcan investment holdings	76/100
Microsoft founder equity and retained shares Allen's wealth originated in Microsoft founder equity, and public reports show he retained large Microsoft holdings well after leaving management.	260.7 million shares in 1999; 100 million shares reported in 2014	66/100
Forbes death-date wealth estimate Forbes-reported public estimate of Allen's total personal net worth at his death.	$20,300,000,000	78/100

Citations

Sources

The Accidental ZillionaireTier 3
Microsoft co-founder Paul Allen's art collection smashes auction recordTier 2
Paul Allen's Art Sells for a Record $1.5 BillionTier 3
Gates Stuffs $28 Mil in PocketsTier 3
Paul AllenTier 4
Microsoft co-founder Paul Allen dies at 65Tier 2
Paul Allen, co-founder of Microsoft, dies aged 65Tier 2
Paul Allen - Forbes ProfileTier 2

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Correction

Public estimates are reviewed but uncertain. Submit a correction if a source or assumption should be updated.

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