X0306 4 2012-10-29 0 0001372375 Millennial Media Inc. MM 0001362890 Deer VI & Co. LLC C/O BESSEMER VENTURE PARTNERS 1865 PALMER AVENUE, SUITE 104 LARCHMONT NY 10538 1 0 1 0 0001362888 Bessemer Venture Partners Co-Investment L.P. C/O BESSEMER VENTURE PARTNERS 1865 PALMER AVENUE, SUITE 104 LARCHMONT NY 10538 1 0 1 0 0001362889 Bessemer Venture Partners VI Institutional L.P. C/O BESSEMER VENTURE PARTNERS 1865 PALMER AVENUE, SUITE 104 LARCHMONT NY 10538 1 0 1 0 0001362891 Bessemer Venture Partners VI L.P. C/O BESSEMER VENTURE PARTNERS 1865 PALMER AVENUE, SUITE 104 LARCHMONT NY 10538 1 0 1 0 Common Stock 2012-10-29 4 S 0 2202329 13.4425 D 11297902 I By Funds The total includes 1,633,048 shares sold by Bessemer Venture Partners VI, L.P. ("BVP VI"), 548,506 shares sold by Bessemer Venture Partners Co-Investment, L.P. ("BVP Co-Investment") and 20,775 shares sold by Bessemer Venture Partners VI Institutional, L.P. ("BVP Institutional," and together with BVP VI and BVP Co-Investment, the "Funds"). The total includes 8,377,503 shares held by BVP VI, 2,813,824 shares held by BVP Co-Investment and 106,575 shares held by BVP Institutional. Deer VI & Co LLC ("Deer VI") is the general partner of each of the Funds. The Funds, together with Deer VI, are the "Bessemer Entities." Deer VI disclaims beneficial ownership of the securities owned directly by the Funds, and this report shall not be deemed as admission that Deer VI is the beneficial owner of such securities, except to the extent of its pecuniary interest therein, if any, by virtue of its general partner interests in the Funds. Robert Goodman, an executive manager of Deer VI, serves as the representative of the Bessemer Entities on the issuer's board of directors. /s/ J. Edmund Colloton, Executive Manager of Deer VI & Co. LLC 2012-10-29 /s/ J. Edmund Colloton, Executive Manager of Deer VI & Co. LLC, the General Partner of Bessemer Venture Partners Co-Investment L.P. 2012-10-29 /s/ J. Edmund Colloton, Executive Manager of Deer VI & Co. LLC, the General Partner of Bessemer Venture Partners VI Institutional L.P. 2012-10-29 /s/ J. Edmund Colloton, Executive Manager of Deer VI & Co. LLC, the General Partner of Bessemer Venture Partners VI L.P. 2012-10-29