| STG Partners | |
| Company type | Private |
| Industry | Private equity |
| Predecessor | Symphony Technology Group (2002-2017) |
| Founded | 2017 |
| Founder | William "Bill" Chisholm |
| Headquarters | 1300 El Camino Real, Suite 300, Menlo Park, California, U.S. |
Number of locations | 3 (Bangalore, India; London, England; Menlo Park, CA) |
Key people | Managing partner: William "Bill" Chisholm [1] Managing director and CFO: Stephen Henkenmeier [2] Managing directors: Marc A. Bala, Douglas M. Haines, and Johnie T. Treadwell [2] |
| AUM | $12 billion (2025) [2] $11.7 billion (2024) [3] |
| Total assets | Less than $1 billion (2025) [2] |
| Owner | STG Management Holdings, L.P., "Greater than 75%" [2] |
Number of employees | 88 (2025) [2] |
| Website | stg |
STG Partners, LLC (STG) is an American private equity firm and based in Menlo Park, California. [4] Its predecessor, Symphony Technology Group ("Symphony") was founded in 2002 [5] by Romesh Wadhwani, William Chisholm, and Bryan Taylor. In 2017, Symphony was reorganized as STG Partners. [5] 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. [2]
In the early 2000s, Romesh Wadhwani invited William "Bill" Chisholm to join new private equity firm, Symphony Technology Group (Symphony), as a senior investment partner. [6] [7] Bryan Taylor was also a co-founder of Symphony, [8] and remained at the firm until 2004. [9]
In 2017, Wadhwani retired as Symphony's CEO, and the firm was reorganized as STG Partners LLC. [5] [6] [10] Chisholm assumed the CEO and ownership role. [6] [11]
In September 2021, STG Management Holdings, L.P., acquired "greater than 75%" of STG Partners. [2]
The firm maintains offices in Bangalore, India, London, England, and Menlo Park, California. [2] Stephen Henkenmeier is STG's managing director and CFO. [5]
In March 2025, STG Partners reported $12 billion in assets under management (AUM), [2] a slight increase from $11.7 billion AUM in 2024. [3] In addition, Symphony Technology Group, which maintains an inter-company relationship with STG Partners, reported approximately $341 million AUM in March 2025. [12]
Symphony acquired McGraw-Hill Construction from McGraw-Hill Financial for US$320 million on September 22, 2014. [13] The acquisition includes Engineering News-Record, Architectural Record, Dodge and Sweet's. [14] McGraw-Hill Construction has been renamed Dodge Data & Analytics. [15]
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. [16]
In March 2021, STG acquired McAfee Enterprise for $4 billion. [17] 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. [18] 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. [19] 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, and led by CEO Gee Rittenhouse. [20]
On January 5, 2022, EFI split off its software business, creating eProductivity Software, which was sold to STG. [21]
On the same date, STG acquired media monitoring provider Kantar Reputation Intelligence, a former subsidiary of Kantar, alongside PR measurement workflow provider PRgloo, and US-based media analytics start up Onclusive [22] [23] . The merged company operates under the name Onclusive.
In March 2023, a private equity consortium led by STG agreed to acquire Momentive Global Inc. formerly SurveyMonkey, an experience management company, based in San Mateo, California, in an all-cash deal valued at $1.5 billion, [24] [25] [26] and rebranded it back to SurveyMonkey.
In July 2023, Wrike, a project management platform, was acquired by STG for an undisclosed amount. [27]
In November 2023, in a $1.4 billion deal, STG acquired Avid Technology, a Burlington, Mass.-based company that makes Sibelius, Pro Tools, Media Composer, and other products for the audio, video, and media industries. [28]
Dodge Data & Analytics, a data provider formerly known as McGraw-Hill Construction