Billionaire Profile
Katharine Rayner
Global Rank
#610

Image: Public domain | via Wikimedia Commons

Katharine Rayner

CEO, Cox Enterprises
US
Real-Time Net Worth
$6.3B
As of December 2025
Age
80
Source
Media, automotive
Industry
media-entertainment
Citizenship
US

Biography

Katharine Rayner, born in the mid-1940s, is an American heiress with an estimated net worth of $6.3 billion. Her primary wealth source stems from her inheritance of a significant stake in Cox Enterprises, a media and automotive conglomerate. Rayner's career includes work as a journalist and author. She is also a dedicated philanthropist, actively involved in supporting various charitable causes. Her contributions include a $15 million gift to the New York Public Library and a $5 million donation to the Animal Medical Center.

Wealth Over Time

In-Depth Profile

Early Life

Katharine Ann Johnson Rayner, known as Kathy, was born in either 1944 or 1945 in Atlanta, Georgia. She is the daughter of Anne Cox Chambers and Louis G. Johnson, and the granddaughter of James M. Cox, the founder of Cox Enterprises. She has a sister, Margaretta Taylor, and a half-brother, James Cox Chambers.

Rise to Success

Rayner's wealth originates from her inheritance. In 2015, her mother, Anne Cox Chambers, distributed her 49% share in Cox Enterprises equally among her three children. Katharine Rayner received a 17% stake, significantly increasing her net worth.

Key Business Strategies

While Rayner holds a significant stake in Cox Enterprises, she has not taken an active role in the company's operations.

Philanthropy

Katharine Rayner is actively involved in philanthropy. In 2019, she donated over $5 million to the Animal Medical Center in New York City. She has also made substantial contributions to the New York Public Library, including a $15 million gift to strengthen its research collections. She serves on the boards of the New York Public Library and the Morgan Library.

Career Milestones

2015

Inheritance

Inherited a 17% stake in Cox Enterprises.

2019

Philanthropic Donation

Donated over $5 million to the Animal Medical Center in New York City.

2024

Philanthropic Donation

Pledged $10 million to the Morgan Library & Museum.

Philanthropy & Social Impact

Animal Welfare

Animal Medical Center

$5M

Donation to the Animal Medical Center in New York City.

Education and Arts

New York Public Library

$15M

Gift to support research collections.

Arts & Culture

Morgan Library & Museum

$10M

Pledge to the Centennial Campaign