Last updated 6/30/2026

John D. RockefellerNet Worth Estimate

Estimated Peak Wealth$850.0M - $950.0M$850,000,000 - $950,000,000(1913 USD)Adjusted$27.7B - $31.0B(2025 USD)

John D. Rockefeller's peak wealth is best estimated at about $850 million to $950 million in 1913 dollars, with a midpoint near the commonly cited $900 million figure.

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Historical Basis

Source-Era Wealth

Valuation1913

Original Range$850.0M - $950.0M

Adjusted Range$27.7B - $31.0B

Adjusted To2025

CPI purchasing-power adjustment

Context only; economic power may differ.

Drivers

Wealth Breakdown

7 reviewed sources4 high-quality sources

Wealth composition$900,000,0002 sources

Peak personal wealth1 input · 2 sources · 84/100 confidenceIncluded$900,000,000

Not Counted Directly

Inflation contextContext only · $29,300,000,000PhilanthropyContext only · $540,000,000Market controlContext only · 0.9Founder equityContext only · 0.249

Estimate

Current Assessment

Rockefeller's fortune came mainly from Standard Oil. At the time of the 1911 breakup, Rockefeller Archive Center records say he held 244,500 of 983,383 outstanding shares of the parent company. PBS places his lifetime peak wealth at $900 million in 1913, helped by the breakup's effect on the value of the successor companies. Other holdings in mining, timber, manufacturing, and transportation likely contributed, but public sources reviewed here do not value them separately.

Key caveats

This is a historical peak estimate in 1913 dollars, not a current Rockefeller family estimate.
A 2025 inflation comparison puts $900 million in 1913 at roughly $29.3 billion, but inflation does not capture his economic power relative to the U.S. economy.
Large charitable transfers are not added back into personal net worth after donation.

Evidence gaps

No complete 1913 personal balance sheet was found.
No itemized liability figure was found.
A security-by-security valuation of Standard Oil successor holdings would improve precision.

Confidence

Medium confidence

78/100

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

Key Evidence Gaps

Security-by-security market valuation of Rockefeller's Standard Oil successor holdings around 1913.
Itemized 1913 personal balance sheet including cash, securities, real estate, private investments, and debts.
Independent appraisals or valuation evidence for non-Standard Oil holdings such as iron mines, timberland, manufacturing, transportation, and real estate.
Additional scholarly or contemporaneous sources triangulating the $900 million 1913 peak figure.

Public Caveats

This is a historical peak estimate for John D. Rockefeller Sr. in 1913 U.S. dollars, not a current Rockefeller family net-worth estimate.
The range is anchored to a published $900 million 1913 peak figure, not a complete bottom-up valuation of every Standard Oil successor security and private asset.
The inflation-adjusted comparison is purchasing-power context only and does not measure Rockefeller's economic power relative to the U.S. economy.
No itemized personal liability schedule was found in the supplied artifacts.

Range Model

Scenario Spread

Conservative

$700.0M - $900.0M

Base

$850.0M - $950.0M

Aggressive

$900.0M - $1.1B

Uncertainty Drivers

The $900 million peak figure is widely repeated but not reconstructed in the reviewed public sources from a full security-by-security balance sheet.
The market value of each Standard Oil successor company and Rockefeller's holdings outside Standard Oil were not itemized in accessible sources used here.
Large philanthropic transfers complicate lifetime wealth versus point-in-time net worth.
Inflation comparisons vary widely depending on CPI, GDP share, relative income, or economic power methodology.

Evidence

Reviewed Signals

Signal	Value	Confidence
Liabilities not itemized No reviewed public source provides a personal debt figure for the 1913 peak date.	n/a	70/100
Oil refining market power PBS reports Rockefeller controlled almost 90% of oil refined in the United States by 1877.	€1	82/100
Philanthropic transfers Large lifetime and 1913 foundation giving show wealth scale and explain later reduction of personal/family holdings.	$540,000,000	88/100
Diversified holdings RAC identifies iron mines, timberland, manufacturing, transportation, and other investments beyond Standard Oil.	Value not specified	72/100
Standard Oil ownership stake Rockefeller owned about one quarter of Standard Oil's parent shares at the time of dissolution.	€0	94/100
1913 peak personal wealth estimate Published peak wealth estimate centered on Standard Oil successor holdings and other investments.	$900,000,000	84/100

Citations

Sources

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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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