Bill Chisholm’s net worth is estimated at $3.2 billion, according to Forbes. Chisholm is the Managing Partner and Chief Investment Officer of STG Partners (formerly Symphony Technology Group), a private equity firm focused on enterprise software and cybersecurity that manages over $12 billion in assets under management. In 2025, he led the record-setting $6.1 billion purchase of the Boston Celtics NBA franchise, completing the largest transaction in professional sports team history at the time.
Updated March 2026: According to Forbes, Chisholm’s wealth is derived primarily from his management stake and co-investment in STG Partners’ portfolio companies, which include major cybersecurity and enterprise software firms. His Celtics ownership stake completed formal transfer in August 2025, and a November 2025 profile in The Athletic detailed his transition into the role of an NBA franchise owner.
William F. Chisholm Jr. was born in 1968 or 1969, making him approximately 57 years old as of 2026. He grew up in a family that instilled strong work and academic values. Chisholm attended Dartmouth College, where he played on the men’s soccer team under coaches who recalled him as a talented and tall player, per Dartmouth Athletics. It was at Dartmouth around 1988 that he met his future wife, Kimberly Ford.
After Dartmouth, Chisholm pursued a career in finance and investment management, building expertise in technology sector mergers and acquisitions before co-founding his own private equity firm.
Chisholm co-founded Symphony Technology Group (later renamed STG Partners) in 2002. From its base in Menlo Park, California, STG became one of Silicon Valley’s most active private equity firms focused on technology carve-outs — acquiring divisions or subsidiaries from larger corporations and operating them as independent businesses. Under Chisholm’s leadership as Managing Partner and CIO, STG grew its assets under management to over $12 billion.
Key deals Chisholm orchestrated at STG include:
In March 2025, Forbes reported that Chisholm led a buying consortium that agreed to acquire the Boston Celtics from the Grousbeck family for a record $6.1 billion, the highest price ever paid for a professional sports team. The transaction cleared NBA Board of Governors approval and was formally completed in August 2025, per CBS Boston. Chisholm’s personal equity stake in the franchise is estimated at a minimum of $915 million.
Bill Chisholm and his wife Kimberly Ford Chisholm met at Dartmouth College around 1988 and married in the early 1990s, per reporting by the Boston Globe. Kimberly Chisholm has been described as a major behind-the-scenes partner in Bill’s entrepreneurial journey. The couple has three children, including a son named Will Chisholm.
The family’s primary residence is an approximately $17 million estate in Atherton, California, one of the wealthiest ZIP codes in the United States. They also maintain homes in New York City, Nantucket, Massachusetts, and Hanover, New Hampshire, with reported plans to establish a Boston residence following the Celtics acquisition.
Chisholm has spoken about his deep passion for basketball and the Boston Celtics in interviews, describing the franchise purchase as a personal and professional milestone. In a November 2025 profile in The Athletic, he discussed the franchise’s post-championship roster challenges and his commitment to sustained competitive excellence.
Bill Chisholm’s net worth is estimated at $3.2 billion, according to Forbes. His wealth is primarily derived from his co-founder stake and carried interest at STG Partners, a private equity firm with over $12 billion in assets under management focused on cybersecurity and enterprise software.
Bill Chisholm’s wife is Kimberly Ford Chisholm. The couple met at Dartmouth College around 1988 and have been married since the early 1990s. Kimberly has been described in press profiles as a significant presence in her husband’s entrepreneurial life. The Boston Globe profiled her following the announcement of the Celtics acquisition.
Bill Chisholm was born in 1968 or 1969, making him approximately 56–57 years old as of 2026. His exact birth date has not been publicly disclosed. He attended Dartmouth College starting around 1987.
Bill Chisholm led a buying consortium that agreed to purchase the Boston Celtics from the Grousbeck family for a record $6.1 billion in March 2025, the highest price ever paid for a professional sports team at the time, per Forbes. The transaction received NBA Board of Governors approval and formally closed in August 2025. Chisholm’s personal equity stake is estimated at a minimum of $915 million.
STG Partners (formerly Symphony Technology Group) is a private equity firm co-founded by Bill Chisholm in 2002, headquartered in Menlo Park, California. The firm manages over $12 billion in assets and specializes in acquiring and scaling enterprise software and cybersecurity businesses, including major transactions such as the McAfee Enterprise–FireEye merger (forming Trellix) and the acquisition of RSA Security for $2.075 billion.
Bill Chisholm’s primary residence is an approximately $17 million estate at 36 Ralston Road in Atherton, California. He and his family also maintain homes in New York City, Nantucket, Massachusetts, and Hanover, New Hampshire. He has reportedly planned to establish a Boston-area residence following the completion of the Celtics acquisition in 2025.