When was Siris Capital founded?

Siris Capital was founded in 2011.

Where is Siris Capital's headquarters located?

Siris Capital's headquarters is located in New York City (United States).

How big is Siris Capital's investment team?

Siris Capital has a team of 40, including 13 partners.

How many companies has Siris Capital invested in?

Siris Capital has invested in 12 companies, including Mavenir & Constant Contact.

Which companies has Siris Capital invested in lately?

Gigamon & Mavenir are the latest investments by Siris Capital.

Siris Capital - 2026 Investor Profile, Portfolio, Team & Exits

Siris Capital is a private equity firm founded in 2011. It is primarily based in New York City, United States. As of Aug 2026, Siris Capital has a portfolio of 12 companies, comprising 12 funding rounds and 15 acquisitions. In the last 12 months, it has participated in 1 acquisition. The firm primarily invests in companies based in United States. Its portfolio is spread across a wide range of sectors from Enterprise Applications to Telecom. Most recently it acquired stakes in Takkion on May 06, 2026.

Overall Siris Capital portfolio has seen 3 IPOs and 9 acquisitions, namely Mavenir, Constant Contact and Gigamon. Clearlake Capital Group co-invest with Siris Capital, sharing a substantial percentage of its portfolio.

Siris Capital has a team of 40 people, including 13 partners.

Key Metrics

Founded Year

2011

Location

New York City, United States

Portfolio Companies

Mavenir, Constant Contact & 10 more

Portfolio Sectors

Enterprise Applications, Telecom

Portfolio Locations

United States

Acquisition Deals

Takkion, Bearcom & 13 more

Investment Deals

Mavenir, Constant Contact & 10 more

View Siris Capital's full profile

Siris Capital has a portfolio of 12 companies. They have invested in a total of 12 companies. Their most recent investment was in Gigamon (PE round) on Feb 22, 2024. Here are the most recent investments by Siris Capital:

Date	Company	Round	Amount	Co-Investors
Feb 22, 2024	Gigamon	PE	4459	-
May 02, 2023	Mavenir	Post IPO	3660	-
Oct 04, 2022	Mavenir	Post IPO	2902	-
Feb 10, 2021	Constant Contact	Post IPO	7286	Clearlake Capital Group

View all investments by Siris Capital

Siris Capital has acquired 15 companies. Their most recent acquisition was of Takkion on May 06, 2026. Here are the most recent acquisitions by Siris Capital:

Acquisition Date	Company	Short Description	Total Funding	Founded Year
May 06, 2026	Takkion	Provider of logistics, operations, and maintenance services, specializing in supporting the renewable energy industry through a range of solutions	-	2019
Dec 15, 2023	Bearcom	Provider of vehicle upfitting services	-	1981
Mar 17, 2022	YITH	Extension tools for eCommerce stores	-	2012
Jul 07, 2021	American Stock Transfer & Trust Company	Professional services provider	-	1971

Here is the portfolio snapshot of Siris Capital:

Investments by Year

The maximum number of investments were made in 2024

Acquisitions by Year

The maximum number of acquisitions were made in 2021

Portfolio by Location

Companies are primarily in United States

Portfolio by Sector

Companies are primarily in Enterprise Applications

Siris Capital has a team of 40 members including 13 Partners and 10 Principals located in United States and United Kingdom. Siris Capital's team does not sit on the board of any company as of now.

Here is a list of top team members in Siris Capital:

Name	Designation	Location	Board Memberships	Contact Details
David Yates	Partner	London	-	-
Bret Griess	Partner	Douglas County	-	1 Email
Peter Berger	Partner	New York City	-	1 Email
Jeffrey Hendren	Partner	New York City	-	1 Email
Robert Aquilina	Partner	Summit	-	1 Email
Hubert De Pesquidoux	Partner	New York City	-	-
Roderick Randall	Partner	Hopkinton	-	1 Email
Theodore Schell	Partner	New York City	-	1 Email
John Swainson	Partner	Austin	-	1 Email
Stephen Catera	Partner	West Palm Beach	-	1 Email
Tyler Sipprelle	Partner	New York City	-	-