X0306 4 2017-08-01 0 0001437107 Discovery Communications, Inc. DISC 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 SYRACUSE 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 A Convertible Participating Preferred Stock 2017-08-01 4 D 0 434070 D Series A Common Stock 434070 70673242 I See Footnote Series A Convertible Participating Preferred Stock 2017-08-01 4 D 0 434070 D Series C Common Stock 434070 70673242 I See Footnote Series C Convertible Participating Preferred Stock 2017-08-01 4 D 0 446162 D Series C Common Stock 892324 24874370 I See Footnote Each share of Series A Convertible Participating Preferred Stock is convertible pursuant to its terms into one share of Series A Common Stock and one share of Series C Common Stock at any time (following a stock dividend that occurred on August 6, 2014). Shares released from the escrow account governed by the Escrow Agreement, dated September 17, 2008, by and among the Issuer, Advance/Newhouse Programming Partnership and JPMorgan Chase Bank to the Issuer in accordance to the terms of such Escrow Agreement. Prior to their release in accordance with the Escrow Agreement, such shares were deemed to be beneficially owned by each reporting person. Advance/Newhouse Programming Partnership is the record holder of the Series A Convertible Participating Preferred Stock and Series C Convertible Participating Preferred Stock and therefore a reporting person hereunder. The other reporting persons own such shares through subsidiaries. Each reporting person disclaims beneficial ownership except to the extent of its pecuniary interest. Each share of Series C Convertible Participating Preferred Stock is convertible pursuant to its terms into two shares of Series C Common Stock at any time (following a stock dividend that occurred on August 6, 2014). Disposed to the Issuer in an exempt transaction. Advance/Newhouse Programming Partnership, By: /s/ Michael A. Newhouse, Vice President 2017-08-02 Newhouse Broadcasting Corporation, By: /s/ Michael A. Newhouse, Executive Vice President 2017-08-02 Advance Publications, Inc., By: /s/ Michael A. Newhouse, Co-President 2017-08-02 Newhouse Family Holdings, L.P., By: Advance Long-Term Management Trust, as General Partner, By: /s/ Michael A. Newhouse, Trustee 2017-08-02 Advance Long-Term Management Trust, By: /s/ Michael A. Newhouse, Trustee 2017-08-02