X0205 3 2012-03-28 0 0001372375 Millennial Media Inc. MM 0001545621 Brandenburg John Christopher C/O MILLENNIAL MEDIA, INC. 2400 BOSTON STREET, SUITE 201 BALTIMORE MD 21224 0 1 0 0 EVP, Chief Technology Officer Common Stock 5396052 D Common Stock 650000 I By GRAT Employee Stock Option (right to buy) 0.736 2019-03-30 Common Stock 10000 D These shares are held by The John Christopher Brandenburg 2010 Grantor Retained Annuity Trust, of which the reporting person is the trustee. This option vests over a period of four years, with 25% of the shares underlying the option vested on March 31, 2010, the first anniversary of the date of grant, and the remainder vesting in 36 equal monthly installments thereafter, subject to the reporting person's continuous service with the issuer as of the applicable vesting date. Exhibit List Exhibit 24.1 - Power of Attorney /s/ Brian F. Leaf, Attorney-in-fact 2012-03-28