GiveRate / All records / Forbes 400 (Sept. 2026) / John A. Sobrato & family
John A. Sobrato & family
10–20%
John A. Sobrato & family has given an estimated 10–20% of current net worth ($5.5B), based on Forbes' philanthropy score.
- GiveRate
- 10–20%
- Net worth
- $5.5B
- Stated lifetime giving
- Not stated
- Forbes 400
- #311 · Real estate · Atherton, California
- Status
- Source-reported range
- Sources
- Forbes 400 profile · Sept. 2026
The math
Forbes philanthropy score 4 of 5: lifetime giving is 10–20% of current net worth. The range is Forbes' own banding; GiveRate shows it as published.
Profile
- Age
- 87
- Residence
- Atherton, California
- Industry
- Real Estate
- Source of wealth
- Real estate
- Self-made
- Yes
- Role
- Founder and Chairman, Sobrato Development Cos.
- One-year change
- $6.3B (#232) in Sept. 2025 to $5.5B (#311) in Sept. 2026, a drop of 13%.
What the range means in dollars
Forbes gives John A. Sobrato & family a philanthropy score of 4 out of 5, meaning lifetime giving equals 10% to 20% of current net worth. On a $5.5B fortune, that implies lifetime giving of roughly between $550M and $1.1B. 17 of the 400 share this score, 353 score lower and 13 score higher.
For scale: 10% to 20% of a $50,000 household income would be $5,000 to $10,000.
Giving on record
In 2017, he pledged $100 million to Santa Clara University, his alma mater, for a new STEM education center.
From the Forbes profile (Sept. 2026).
Others in Real Estate
- Stephen Ross: 1–5% · $21.5B
- Donald Bren: 5–10% · $19.8B
- Jeff Greene: Under 1% · $10.1B
- Neil Bluhm: 1–5% · $9.9B
- Igor Olenicoff: Under 1% · $9.1B
- Leonard Stern: Under 1% · $9.0B
Others in California
- Larry Page: Under 1% · $278B
- Sergey Brin: 1–5% · $256B
- Mark Zuckerberg: 1–5% · $212B
- Jensen Huang: Under 1% · $199B
- Eric Schmidt: 5–10% · $37.8B
- Henry Samueli: 1–5% · $33.8B
Questions
How much has John A. Sobrato & family given to charity?
Forbes scores John A. Sobrato & family 4 of 5 for philanthropy, meaning lifetime giving of 10% to 20% of net worth, roughly between $550M and $1.1B on a $5.5B fortune.
What is John A. Sobrato & family's net worth?
Forbes estimates $5.5B as of September 2026, ranking #311 on the Forbes 400.
What is John A. Sobrato & family's GiveRate?
10–20%. GiveRate is lifetime giving as a share of wealth, built from published Forbes figures. See giverate.org/methods/ for the method.
GiveRate is an estimate built only from the published figures above. Wealth and giving totals are themselves estimates. See methods. Spot an error? Request a correction. See all Forbes 400 (Sept. 2026) · Open in the interactive rankings · Calculate your own GiveRate