STG Partners, LLC (STG) is an American

private equity firm A private equity firm or private equity company (often described as a financial sponsor) is an investment management company that provides financial backing and makes investments in the private equity of a Startup company, startup or of an existin ...

and based in

Menlo Park, California Menlo Park ( ) is a city at the eastern edge of San Mateo County, California, San Mateo County in the San Francisco Bay Area of California, United States. It is bordered by San Francisco Bay on the north and east; East Palo Alto, California, Eas ...

. Its predecessor, Symphony Technology Group ("Symphony") was founded in 2002Dorbian, Iris (July 1, 2024)
STG Rising: Hailing the Newcomer on the 100.
Buyouts. by Romesh Wadhwani, who recruited William Chisholm and Bryan Taylor to join him in the founding of Symphony. In 2017, Symphony was reorganized as STG Partners. As of March 2025, STG Partners managed approximately $12 billion in 19 pooled investment vehicle for its clients. The firm itself has less than one billion dollars in assets.STG Partners, LLC (March 28, 2025).
FORM ADV: Uniform Application for Investment Adviser Registration and Report By Exempt Reporting Advisers. STG PARTNERS, LLC. FINRA CRD # 291048. SEC file number: 801-112130. Form submitted 3/28/2025 7:10:35 PM.
U.S. Securities and Exchange Commission.

History

In the early 2000s, Romesh Wadhwani invited William "Bill" Chisholm to join a new private equity firm, Symphony Technology Group (Symphony), as a senior investment partner.Dolan, Kerry A. (March 2025)
The Little Known Billionaire Buying The Boston Celtics.
''Forbes''. Bryan Taylor was also a co-founder of Symphony, and remained at the firm until 2004. In 2017, Wadhwani retired as Symphony's CEO, and the firm was reorganized STG Partners LLC. Chisholm assumed the chief executive and ownership role.O'Connell, Robert (March 2025)
He Just the Boston Celtics -- and No One Knows Anything About Him.
''Wall Street Journal''. In September 2021, STG Management Holdings, L.P., acquired "greater than 75%" of STG Partners. The firm maintains offices in

Bangalore, India Bengaluru, also known as Bangalore (List of renamed places in India#Karnataka, its official name until 1 November 2014), is the Capital city, capital and largest city of the southern States and union territories of India, Indian state of Kar ...

London, England London is the Capital city, capital and List of urban areas in the United Kingdom, largest city of both England and the United Kingdom, with a population of in . London metropolitan area, Its wider metropolitan area is the largest in Wester ...

, and

. Stephen Henkenmeier is STG's managing director and

chief financial officer A chief financial officer (CFO) is an officer of a company or organization who is assigned the primary responsibility for making decisions for the company for projects and its finances; i.a.: financial planning, management of financial risks, ...

. In March 2025, STG Partners reported $12 billion in

assets under management In finance, assets under management (AUM), sometimes called fund under management, refers to the total market value of all financial assets that a financial institution—such as a mutual fund, venture capital firm, or depository institutio ...

(AUM), a slight increase from $11.7 billion AUM in 2024.AUM13F (March 29, 2024)
$12 billion STG Partners, LLC. CRD: 291048. SEC: 801-112130. AUM $11.7 BB.
/ref> In addition, Symphony Technology Group, which maintains an inter-company relationship with STG Partners, reported approximately $341 million AUM in March 2025.

Acquisitions

Symphony acquired McGraw-Hill Construction from

McGraw-Hill Financial S&P Global Inc. (prior to 2016, McGraw Hill Financial, Inc., and prior to 2013, The McGraw–Hill Companies, Inc.) is an American Public company, publicly traded corporation headquartered in Manhattan, Manhattan, New York City. Its primary area ...

for US$320 million on September 22, 2014. The acquisition includes

Engineering News-Record The ''Engineering News-Record'' (widely known as ''ENR'') is an American weekly magazine that provides news, analysis, data and opinion for the construction industry worldwide. It is widely regarded as one of the construction industry's most au ...

Architectural Record ''Architectural Record'' is a US-based monthly magazine dedicated to architecture and interior design. Its editor in chief is Josephine Minutillo. ''The Record'', as it is sometimes colloquially referred to, is widely-recognized as an important ...

, Dodge and Sweet's. McGraw-Hill Construction has been renamed Dodge Data & Analytics. On February 17, 2020, Dell Technologies sold its RSA Security business to a group led by STG in an all-cash transaction for $2.075 billion. In March 2021, STG acquired McAfee Enterprise for $4 billion. On June 2, 2021, FireEye announced the sale of key software technologies to Symphony for $1.2 billion, while retaining the services business under the Mandiant name. FireEye bought Mandiant for around the same price. On January 18, 2022, Symphony announced the launch of Trellix, an extended detection and response company, which is a combination of FireEye and the McAfee enterprise business. In January 2022, STG announced the McAfee Enterprise security service edge (SSE) business would operate as a separate company to be known as Skyhigh Security. The cloud security company is headquartered in

San Jose, California San Jose, officially the City of San José ( ; ), is a cultural, commercial, and political center within Silicon Valley and the San Francisco Bay Area. With a city population of 997,368 and a metropolitan area population of 1.95 million, it is ...

, and led by CEO Gee Rittenhouse. On January 5, 2022, EFI split off its software business, creating eProductivity Software, which was sold to STG. In March 2023, a private equity consortium led by STG agreed to acquire Momentive Global Inc. formerly SurveyMonkey, an

experience management Experience management is an effort by organizations to measure and improve the experiences they provide to customers as well as stakeholders like vendors, suppliers, employees, and shareholders. The concept posits that experiences comprise distinc ...

company, based in

San Mateo, California San Mateo ( ) is the most populous city in San Mateo County, California, United States, on the San Francisco Peninsula. It is part of the San Francisco Bay Area metropolitan region, and is located about south of San Francisco. San Mateo border ...

, in an all-cash deal valued at $1.5billion, and rebranded it back to SurveyMonkey. On July 7, 2023, Wrike, a work management platform, announced it was being acquired by STG for an undisclosed amount. The transaction was completed later that month. On August 9, 2023, STG announced it was acquiring Avid (a Burlington, Mass.-based company that makes Sibelius, Pro Tools, Media Composer, and other products for the audio, video, and media industries) in a $1.4 billion deal. The deal was completed in November of that year.

Divestments

* Symphony Teleca (from the merger of Teleca and Symphony Services) was sold to Harman International Industries in 2015.

References

{{reflist, 30em Financial services companies established in 2002 Companies based in Menlo Park, California Private equity firms of the United States