CMGID Cmgi (MM)

On October 31, 2007, CMGI, Inc. (the “Company”) filed a Certificate of Amendment of Restated Certificate of Incorporation, as amended (the “Certificate of Amendment”) with the Secretary of State of the State of Delaware to effect a one-for-ten reverse stock split of the Common Stock of the Company (the “Reverse Stock Split”), effective at 11:59 p.m. on October 31, 2007, as described in Item 5.03 below. The Reverse Stock Split had been approved by the Board of Directors on September 13, 2006 and by the Company’s stockholders at the Annual Meeting of Stockholders on December 6, 2006. On September 25, 2007, the Board of Directors authorized the Company to proceed with the Reverse Stock Split. Pursuant to the Reverse Stock Split, each ten shares of Common Stock of the Company were combined and were reclassified into one share of Common Stock of the Company, and the number of issued and outstanding shares of Common Stock of the Company was proportionally reduced, in both cases without any change to the authorized number of shares of Common Stock or in the par value of such shares. No fractional shares were issued in connection with the Reverse Stock Split. Stockholders who are entitled to fractional shares will receive cash in lieu of receiving fractional shares at a rate of $13.40 per share (the average closing price of the Common Stock for the five trading days preceding the Reverse Stock split, after giving effect to the Reverse Stock split). The exercise price, as well as the number of shares of Common Stock to be issued upon exercise of the Company’s outstanding stock options, were proportionately adjusted to reflect the Reverse Stock Split. The number of shares reserved for issuance under the Company’s equity compensation plans were also reduced proportionately.

As of the opening of the Nasdaq Global Market on November 1, 2007, the Company’s Common Stock began trading on a split-adjusted basis under the trading symbol “CMGID”. After a period of 20 trading days the trading symbol will return to “CMGI”.

On November 1, 2007, the Company issued a press release announcing the completion of the Reverse Stock Split described above. A copy of the press release issued by the Company is filed herewith as Exhibit 99.1 and is incorporated herein by reference.

In connection with the Reverse Stock Split described above, the Company revised its specimen certificate of Common Stock, $0.01 par value per share, to reflect a new CUSIP number. A copy of the revised specimen certificate is filed herewith as Exhibit 4.1.