X0306 4 2017-08-10 0 0001437107 Discovery Communications, Inc. DISCK 0001455381 ADVANCE LONG-TERM MANAGEMENT TRUST ONE NEWARK CENTER, 19TH FLOOR C/O ROBINSON MILLER, LLC NEWARK NJ 07102 1 0 1 0 0000914545 NEWHOUSE BROADCASTING CORP 6350 COURT STREET EAST SYRACUSEN NY 13057 1 0 1 0 0000914546 ADVANCE PUBLICATIONS, INC 950 FINGERBOARD ROAD STATEN ISLAND NY 10305 1 0 1 0 0001455383 NEWHOUSE FAMILY HOLDINGS, L.P. ONE WORLD TRADE CENTER NEW YORK NY 10007 1 0 1 0 0001455382 ADVANCE/NEWHOUSE PROGRAMMING PARTNERSHIP 6350 COURT STREET EAST SYRACUSE NY 13057 1 0 1 0 Series C-1 Convertible Participating Preferred Stock 2017-08-10 4 D 0 201119 508.41 D Series C Common Stock 3894645 6017473.5 I See Footnote Each share of Series C-1 Convertible Participating Preferred Stock is convertible pursuant to its terms into 19.3648 shares of Series C Common Stock at any time. Sold to the Issuer in an exempt transaction. Advance/Newhouse Programming Partnership is the record holder of shares of Series C-1 Convertible Participating Preferred Stock. The other reporting persons may be deemed to beneficially own the shares of Series C-1 Convertible Participating Preferred Stock held by Advance/Newhouse Programming Partnership due to their control of Advance/Newhouse Programming Partnership. Each reporting person disclaims beneficial ownership except to the extent of its pecuniary interest. Advance/Newhouse Programming Partnership, By: /s/ Michael A. Newhouse, Vice President 2017-08-14 Newhouse Broadcasting Corporation, By: /s/ Michael A. Newhouse, Executive Vice President 2017-08-14 Advance Publications, Inc., By: /s/ Michael A. Newhouse, Co-President 2017-08-14 Newhouse Family Holdings, L.P., By: Advance Long-Term Management Trust, as General Partner, By: /s/ Michael A. Newhouse, Trustee 2017-08-14 Advance Long-Term Management Trust, By: /s/ Michael A. Newhouse, Trustee 2017-08-14