Differentiated Strategy.
Sound Execution.
Operational Focus.

Siris is a private equity firm that invests in mission-critical, mature tech & telecom businesses at strategic crossroads.

Our StrategyOur Team

Since 2011

Siris has raised over $5.9 billion of cumulative committed capital and is currently targeting investment opportunities with transaction values of $500 million to $5 billion.

Tech & Telecom Focus

Our portfolio consists of companies with mission-critical products and services across the tech and telecom landscape.


September 28, 2020

Ivanti, backed by Clearlake Capital and TA Associates, announces strategic acquisitions of Mobileiron and Pulse Secure to further automate and secure endpoints  Read More

February 10, 2020

TPx Announces Completion of its Acquisition by Affiliates of Siris Capital Group, LLC  Read More


Combining investment acumen and hands-on operating expertise.

New York

601 Lexington Ave.
59th. Floor
New York, NY, 10022

Palo Alto

524 Hamilton Ave.
Suite 201
Palo Alto, CA 94301