UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K/A

(Amendment No. 1)

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the

Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): May 1, 2012

ENVESTNET, INC.

(Exact name of registrant as specified in its charter)

(312) 827-2800

(Registrant’s telephone number, including area code)

Not Applicable

(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligations of the registrant under any of the following provisions (see General Instruction A.2. below):

Explanatory Note

This Amendment No. 1 to Current Report on Form 8-K/A is being filed by Envestnet, Inc. (“Envestnet”) solely for the purpose of amending and supplementing Item 9.01 of that certain Current Report on Form 8-K originally filed by Envestnet with the Securities and Exchange Commission (“SEC”) on May 1, 2012 (the “Original Form 8-K”) in connection with the merger of its wholly owned subsidiary with and into Tamarac, Inc., a Washington corporation (“Tamarac”). As indicated in the Original Form 8-K, this Form 8-K/A is being filed to provide the information required by Item 9.01(a) and (b) of Form 8-K, which was not previously filed with the Original Form 8-K as permitted by the rules of the SEC.

Item 9.01 Financial Statements and Exhibits.

The following financial statements of Tamarac are being filed as exhibits to this amendment and are incorporated by reference herein:

Exhibit 99.1 — Tamarac’s audited consolidated financial statements, including the independent auditors’ report, as of and for the year ended December 31, 2011.

Exhibit 99.2— Tamarac’s unaudited condensed consolidated financial statements as of March 31, 2012 and December 31, 2011 and for the three months ended March 31, 2012 and 2011.

The following pro forma financial information is being filed as an exhibit to this amendment and is incorporated by reference herein:

Exhibit 99.3 — Unaudited pro forma condensed combined financial statements and explanatory notes for Envestnet as of March 31, 2012, for the three months ended March 31, 2012 and for the year ended December 31, 2011.

Forward-Looking Statements

Information in this Current Report on Form 8-K/A, together with the exhibits attached hereto, contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 that involve risks and uncertainties, including, but not limited to, statements regarding the integration of Envestnet and Tamarac, the expected benefits and costs of the Tamarac acquisition; Envestnet’s plans relating to the acquisition; the future financial and accounting impact of the acquisition; and any statements of expectation or belief or assumptions underlying any of the foregoing. Readers are cautioned that these forward-looking statements are only predictions and are subject to risks, uncertainties and assumptions that are difficult to predict. Factors that could cause actual results and the timing of certain events to differ materially from the forward-looking statements, include, but are not limited to, the possibility that the expected costs and benefits of the acquisition may not materialize as expected; the possibility that preliminary financial reporting estimates and assumptions may prove to be incorrect; the failure of Envestnet to successfully integrate the Tamarac business or realize synergies; conditions in the capital and financial markets, general economic conditions and other risks that are described in Envestnet’s Annual Report on Form 10-K for the year ended December 31, 2011.

The following exhibits are filed as part of this Current Report on Form 8-K/A.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

Date: July 12, 2012

EXHIBIT INDEX