SIRIS LOGO ABOUT STRATEGY TEAM PORTFOLIO NEWS CONTACT INVESTOR LOGIN News News ALL 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 November 17, 2021 Siris Publishes Inaugural Annual ESG Report and Joins the UN-supported Principles for Responsible Investment READ MORE November 2, 2021 SaaS Leader Bret Griess Joins Siris as Executive Partner READ MORE October 18, 2021 Cybersecurity Executive John McCormack Joins Siris as Executive Partner READ MORE September 29, 2021 Digital and Cloud Services Leader Sandeep Kishore Joins Siris as an Executive Partner READ MORE September 1, 2021 Constant Contact Closes Acquisition of SharpSpring READ MORE August 12, 2021 Clearlake and Siris-Backed Newfold Digital Acquires Yoast to Help Customers Get Found Online READ MORE June 22, 2021 Clearlake Capital and Siris-Backed Constant Contact Agrees to Acquire SharpSpring READ MORE June 1, 2021 Koch Equity Development Completes Acquisition of Transaction Network Services READ MORE May 27, 2021 Siris Announces a Recommended Cash Offer for Equiniti Group PLC READ MORE 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 April 14, 2021 Koch Equity Development Affiliate Enters Agreement to Acquire Transaction Network Services, Positioned For Strategic Growth READ MORE February 10, 2021 Clearlake and Siris Affiliates Re-Establish Digital Marketing Industry Pioneer Constant Contact as Standalone Company READ MORE February 10, 2021 Clearlake Completes Acquisition of Endurance International Group and Strategic Investment Transactions with Web.com and Affiliates of Siris; Announces Formation of Newfold Digital READ MORE January 6, 2021 Michael Chia Joins Siris as Principal – Investor Relations READ MORE January 5, 2021 Clearlake to make Strategic Investment in Web.com READ MORE January 5, 2021 Harrison Lung Joins Siris as Partner, Portfolio Value Creation READ MORE December 1, 2020 Ivanti Acquires MobileIron and Pulse Secure to Deliver Intelligent and Secure Experiences Across All Devices in the Everywhere Enterprise READ MORE November 23, 2020 Prosper Vignone Joins Siris as Investment Principal READ MORE 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 January 24, 2020 eNett International Signs Definitive Agreement to be Acquired by WEX READ MORE August 19, 2019 Affiliates of Siris Enter into Agreement to Acquire TPx Communications READ MORE July 23, 2019 Electronics For Imaging Announces Completion of Acquisition by an Affiliate of Siris Capital Group, LLC READ MORE July 15, 2019 Global Payments Executive David Yates Joins Siris as Executive Partner READ MORE June 18, 2019 Jeff Jacobson Joins Siris as Executive Partner READ MORE May 30, 2019 Travelport Worldwide Limited announces completion of acquisition by affiliates of Siris Capital Group, LLC and Evergreen Coast Capital Corp. READ MORE May 22, 2019 Tracy Harris to Join Siris as Partner and Head of Investor Relations and Product Strategy READ MORE April 15, 2019 EFI Announces Definitive Agreement To Be Acquired by an Affiliate of Siris Capital Group, LLC In All Cash Transaction Valued At Approximately $1.7 Billion READ MORE April 3, 2019 Siris Capital Group Announces Strategic Minority Investments by Wafra and Landmark Partners READ MORE March 1, 2019 Siris Capital Closes $3.45 Billion Technology Buyout Fund Fund; Significantly Exceeds Target; Will Continue Siris’ Established Strategy of Investing in High- Quality Technology Companies Facing Transitions READ MORE December 11, 2018 Joe Cozzolino Joins Siris Capital Group as Executive Partner READ MORE December 10, 2018 Travelport Worldwide Limited announces agreement to be acquired by affiliates of Siris Capital Group, LLC and Evergreen Coast Capital Corp. in all-cash transaction valued at approximately $4.4 billion READ MORE November 16, 2018 SS&C Completes Acquisition of Intralinks READ MORE October 11, 2018 Web.com Announces Completion of Acquisition by an Affiliate of Siris Capital Group, LLC READ MORE September 5, 2018 Hilton Romanski to Join Siris Capital Group as a Partner & Senior Managing Director READ MORE July 2, 2018 Plantronics Completes Acquisition of Polycom READ MORE June 21, 2018 Web.com Announces Agreement to be Acquired by an Affiliate of Siris Capital Group, LLC for $25.00 per share in All Cash Deal Valued at Approximately $2 Billion READ MORE March 28, 2018 Plantronics to Acquire Polycom for $2 billion READ MORE February 15, 2018 Synchronoss Announces Closing of Convertible Preferred Stock Investment READ MORE January 3, 2018 Bethany Mayer Joins Siris Capital Group as Executive Partner READ MORE November 20, 2017 John Swainson Joins Siris Capital Group as Executive Partner READ MORE November 14, 2017 Affiliates of Siris Capital Group, LLC Complete Acquisition of Intralinks READ MORE October 17, 2017 Affiliates of Siris Capital Group, LLC Enter into Agreements to Acquire Intralinks and Make Preferred Equity Investment in Synchronoss Technologies, Inc. READ MORE August 1, 2017 Pulse Secure, LLC completes acquisition of the virtual Application Delivery Controller (vADC) Business from Brocade Communications Systems, Inc. READ MORE July 31, 2017 Mavenir Systems, Inc. Acquires Virtual Evolved Packet Core (vEPC) Business from Brocade Communications Systems, Inc. READ MORE July 17, 2017 Digital River Enters into Agreement to Divest World Payments Business READ MORE June 1, 2017 Affiliate of Pulse Secure, LLC to Acquire the Virtual Application Delivery Controller (vADC) Business from Brocade Communications Systems, Inc. READ MORE February 28, 2017 Affiliates of Siris Capital Complete Combination of Mitel Mobile with Xura and Ranzure Networks to Create the New Mavenir Systems READ MORE February 21, 2017 CLX Acquires Xura Secure Communications GmbH READ MORE January 12, 2017 PGi Enters into Agreement to Acquire Cloud Communications Provider ReadyTalk READ MORE December 16, 2016 Xura Agrees to Acquire Mitel Mobile and Ranzure Networks READ MORE November 21, 2016 Technology Leader Krish Prabhu joins Siris Capital Group as Executive Partner READ MORE September 27, 2016 Polycom Announces Completion of Acquisition by Affiliates of Siris Capital Group, LLC READ MORE August 19, 2016 Xura Announces Completion of Acquisition by Affiliates of Siris Capital Group, LLC READ MORE July 8, 2016 Siris Capital Group to Acquire Polycom, Inc. for $2.0 Billion in Cash READ MORE May 23, 2016 Siris Capital Announces the Acquisition of Xura, Inc. for Approximately $643 million READ MORE January 11, 2016 Siris Capital portfolio company, Transaction Networks Services, Inc, Announces Investment from Koch Equity Development LLC READ MORE December 21, 2015 Siris Capital portfolio company, Transaction Network Services, Inc, divests Caller Authentication Assets READ MORE December 8, 2015 Siris Capital portfolio company Digital River divests wholly-owned subsidiary BlueHornet READ MORE December 8, 2015 PGi Announces Completion of Acquisition by Siris Capital Group READ MORE October 8, 2015 Digital River enters into agreement to divest Blue Hornet READ MORE September 30, 2015 Digital River completes sales of Beanstream Internet Commerce READ MORE September 30, 2015 CommScope completes acquisition of Airvana READ MORE September 10, 2015 Siris Capital agrees to acquire Premiere Global Services for approximately $1 billion READ MORE September 9, 2015 Neustar to acquire caller authentication assets of TNS READ MORE February 12, 2015 Siris Capital raises $1.81 billion for third technology-focused fund READ MORE February 12, 2015 Siris Capital completes the acquisition of Digital River for approximately $840 million READ MORE November 6, 2014 Mastercard to acquire TNS’ payment gateway business READ MORE October 23, 2014 Siris Capital agrees to acquire Digital River for approximately $840 million READ MORE October 1, 2014 Siris Capital completes purchase of Juniper Networks® Junos® Pulse Business and BYOD Innovator MobileSpaces READ MORE April 28, 2014 Siris Capital completes the acquisition of Stratus Technologies for approximately $352 million READ MORE March 31, 2014 Stratus Technologies to be Acquired by Siris Capital Group READ MORE March 6, 2014 Alfred Zollar joins Siris Capital Group as Executive Partner READ MORE February 25, 2014 TNS completes dividend recapitalization READ MORE November 14, 2013 Daniel Moloney joins Siris Capital Group as Executive Partner READ MORE August 19, 2013 Elias Mendoza joins Siris Capital Group as Managing Director of Investment Development and Strategy READ MORE June 10, 2013 Siris Capital Group completes sale of Tekelec to Oracle READ MORE February 15, 2013 Siris Capital Group completes the acquisition of TNS for approximately $862 million READ MORE December 13, 2012 Siris Capital Group closes on approximately $650 million for Siris Partners II Private Equity Fund READ MORE January 27, 2012 Siris Capital Group completes the acquisition of Tekelec for approximately $780 million READ MORE NEW YORK 601 Lexington Ave. 59th Floor New York, NY 10022 PALO ALTO 260 Homer Ave. Suite 101 Palo Alto, CA 94301 PALM BEACH Phillips Point West Tower 777 S. Flagler Drive Suite 1400 West Palm Beach, FL 33401 HISTORY STRATEGY TEAM PRIVACY NOTICE PORTFOLIO NEWS CONTACT DISCLAIMER INVESTOR LOGIN ©2021 Siris Capital Group, LLC All Rights Reserved