13D Filing: Clearlake Capital Partners IV Finance, L.P. and Tangoe Inc (TNGO)

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There may be some debate as to whether activist shareholders are good for the long-term health of companies, but there is no debating their results. In 2012, 2013, and 2014, activist investment strategies returned 9.3%, 19.2%, and 8.5% respectively per year. While new activist positions may not be moving the needle quite as much as they once were, the market still values activist involvement in companies. In this article, we reveal one of the latest activist filings, issued by Clearlake Capital Partners IV Finance, disclosing the latest information regarding the activist’s position in Tangoe Inc (NASDAQ:TNGO). The filing is embedded in its entirety below and on the following pages.

You can access the original SEC filing by clicking here.

Ownership Summary Table

Name Sole Voting Power Shared Voting Power Sole Dispositive Power Shared Dispositive Power Aggregate Amount Owned Power Percent of Class
Clearlake Capital Partners IV Finance, L.P. 0 5,109,900 0 5,109,900 5,109,900 12.96%
Clearlake Capital Partners IV GP, L.P. 0 5,109,900 0 5,109,900 5,109,900 12.96%
Clearlake Capital Partners, LLC 0 5,109,900 0 5,109,900 5,109,900 12.96%
CCG Operations, LLC 0 5,109,900 0 5,109,900 5,109,900 12.96%
Behdad Eghbali 0 5,109,900 0 5,109,900 5,109,900 12.96%
Jos E. Feliciano 0 5,109,900 0 5,109,900 5,109,900 12.96%

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13D

(Rule 13d-101)

INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT

TO § 240.13D-1(A) AND AMENDMENTS THERETO FILED

PURSUANT TO § 240.13D-2(A)

(Amendment No. 3)

Tangoe, Inc.

(Name of Issuer)

Common Stock, $0.0001 par value

(Title of Class of Securities)

87582Y108

(CUSIP Number)

Behdad Eghbali

Clearlake Capital Partners IV Finance, L.P.

c/o Clearlake Capital Group, L.P.

233 Wilshire Blvd, Suite 800

Santa Monica, California 90401

(310) 400-8800

copies to:

Mehdi Khodadad

Cooley
LLP

3175 Hanover Street

Palo Alto, California 94304

(650) 843-5000

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)

January 19, 2016

(Date
of Event which Requires Filing of this Statement)

If the filing
person has previously filed a statement on Schedule 13G to report the acquisition which is the subject of this Schedule 13D, and is filing this schedule because of Sections 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following
box.  ¨

Note: Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See Section 240.13d-7 for
other parties to whom copies are to be sent.

The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject
class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the
Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

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