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Rank 1151 of 3,368

William Stone net worth

William Stone's net worth is estimated at $3.7 billion as of 15 Oct 2026, according to Forbes Real-Time Billionaires. The fortune comes mainly from SS&C Technologies.

Industry
Technology
Age
71
Self-made
Yes
City
East Lyme
Source of wealth
SS&C Technologies

Latest estimate

$3.7B

As of 15 Oct 2026, Forbes Real-Time Billionaires

-$244M

-6.3%

vs Jan 2025

History
Technology setting, the industry behind this fortune
Technology, the industry behind this fortune. Illustration, not a photo of William Stone.

William's net worth over time

2 dated estimates since 2025

$0 $1B $2B $3B $4B 2025 2026 $3.9B, 2025, Forbes $3.7B, 15 Oct 2026, Forbes Real-Time Billionaires
As ofNet worthSource
15 Oct 2026$3.7B Forbes Real-Time Billionaires
2025$3.9B Forbes

About William Stone

William Stone (United States) has 2 dated net worth estimates in the public record, the latest $3.7 billion as of 15 Oct 2026 from Forbes Real-Time Billionaires. The fortune is tied to SS&C Technologies, which we classify under technology. William was born in 1955. The earliest estimate we hold, $3.9 billion, is dated 2025. That places William at number 1,151 in the current ranking.

Sources

The description is written by BillionaireList editors from public facts. How estimates are made: methodology.

About William Stone, common questions

How much is William Stone worth?
William Stone's net worth is estimated at $3.7 billion as of 15 Oct 2026, according to Forbes Real-Time Billionaires. That places William at number 1151 in the BillionaireList ranking.

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