SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d)

of the Securities Exchange Act of 1934

Date of earliest event reported: November 3, 2016

Actua Corporation

(Exact name of registrant as specified in charter)

555 East Lancaster Avenue, Suite 640, Radnor, PA 19087

(Address of Principal Executive Offices) (Zip Code)

(610) 727-6900

(Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

On November 3, 2016, Actua Corporation (“Actua”) issued a press release setting forth its financial information for the three-month period ended September 30, 2016 (such press release, the “Earnings Release”). A copy of Earnings Release is attached hereto as Exhibit 99.1 and is hereby incorporated by reference.

Except as expressly set forth by specific reference herein, the information in Section 2 of this report (including Exhibit 99.1) is being furnished pursuant to Item 2.02 and shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed to be incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

On November 3, 2016, Actua issued a press release announcing its intention to commence a modified “Dutch auction” tender offer (the “Tender Offer”). A copy of Actua’s press release is attached hereto as Exhibit 99.2 and is hereby incorporated by reference.

The Earnings Release, which was also issued on November 3, 2016, contained the following information regarding the Tender Offer:

[Actua] announces increase in share repurchase program and intention to launch Dutch tender

Highlights

Neither this report nor any of the attached exhibits constitutes an offer to purchase or a solicitation of an offer to sell any securities of Actua. The Tender Offer will be made only pursuant to an Offer to Purchase, Letter of Transmittal and related documents that Actua intends to distribute to its stockholders and file with the U.S. Securities and Exchange Commission (the “SEC”) as exhibits, or incorporate by reference to in, a tender offer statement on Schedule TO. Stockholders and investors should read carefully the Offer to Purchase, Letter of Transmittal and related documents (including those incorporated therein by reference) because they will contain important information, including the various terms of, and conditions to, the Tender Offer. Stockholders and investors will be able to obtain a free copy of the tender offer statement on Schedule TO, the Offer to Purchase, the Letter of Transmittal and the other documents that Actua intends to file with the SEC at the SEC’s website at www.sec.gov or by calling Innisfree M&A Incorporated, the information agent for the tender offer, by telephone at 888.750.5834 (toll-free), or in writing to 501 Madison Avenue, 20^th Floor, New York, NY 10022. Stockholders are urged to carefully read these materials, when available, prior to making any decision with respect to the Tender Offer.

(d) Exhibits

The following exhibits are filed herewith:

SIGNATURE

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.

EXHIBIT INDEX