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.


April 21, 2021

Mavenir Announces $500 Million Private Placement with Koch Strategic Platforms  Read More

April 20, 2021

Siris offers 170 pence per share to Equiniti – Rule 2.4 Announcement  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