| Wilding Picture Productions | — | — | 2 |
| Wildwood Enterprises | — | — | 2 |
| Willis Kent Productions | — | — | 2 |
| Winkler Production | — | — | 2 |
| WNET | May 15, 1948 | — | 2 |
| Women Make Movies | 1972 | — | 2 |
| YouTube | February 14, 2005 | — | 2 |
| Zion Meyers Productions | — | — | 2 |
| 12-Gauge Production | — | — | 1 |
| 2 Player Productions | 2005 | — | 1 |
| 20th Digital Studio | 2008 | April 26, 2023 | 1 |
| 20th Television Animation | May 19, 1999 | — | 1 |
| 21Sextury | 2003 | — | 1 |
| 30West | 2017 | — | 1 |
| 4Licensing Corporation | 1970 | February 2, 2017 | 1 |
| A Stern Talking To | — | — | 1 |
| A Very Good Production | 2003 | — | 1 |
| A+E Global Media | 1984 | — | 1 |
| ABC News | June 15, 1945 | — | 1 |
| Absolute Entertainment | 1986 | 1995 | 1 |
| Act III Communications | 1985 | — | 1 |
| Actors Studio | October 5, 1947 | — | 1 |
| Adelaide Productions | 1993 | — | 1 |
| Advanced Action Videos | May 7, 2003 | March 25, 2011 | 1 |
| Aes-Nihil Productions | — | — | 1 |
| AFI Conservatory | 1969 | — | 1 |
| AI Multimedia | 2018 | — | 1 |
| Alan Landsburg Productions | 1971 | 1994 | 1 |
| Align | — | — | 1 |
| All Things Comedy | October 2012 | — | 1 |
| AllMusic | 1991 | — | 1 |
| Amaru Entertainment | 1997 | — | 1 |
| Amazon | July 5, 1994 | — | 1 |
| Amblin Television | July 31, 1984 | — | 1 |
| American Society of Civil Engineers | 1852 | — | 1 |
| Andscape | — | — | 1 |
| Animal Planet | October 1996 | — | 1 |
| Animax Entertainment | October 26, 2001 | — | 1 |
| Anita Stewart Productions | 1917 | 1922 | 1 |
| Apologetics Press | 1979 | — | 1 |
| Apple TV | November 2019 | — | 1 |
| Arad Productions Inc. | — | — | 1 |
| Archaia Entertainment | 2002 | — | 1 |
| Archie Comics | 1939 | — | 1 |
| Army Pictorial Service | — | — | 1 |
| Art Institute of Chicago | 1879 | — | 1 |
| Art-O-Graf | 1919 | — | 1 |
| Astor Pictures | 1930 | 1963 | 1 |
| Asymmetrical Productions | 1993 | — | 1 |
| Atlas Film Company | — | — | 1 |
| ATO Records | 2000 | — | 1 |
| August Entertainment | 1988 | — | 1 |
| AXS TV | 2001 | — | 1 |
| Aywon Film Corporation | — | — | 1 |
| Aziani | 2005 | — | 1 |
| Bang Bros | 2004 | — | 1 |
| Bang Zoom! Entertainment | 1993 | — | 1 |
| Bang! | — | — | 1 |
| Bankable Productions | — | — | 1 |
| Barber-Birnbaum | — | — | 1 |
| Barré Studio | 1914 | — | 1 |
| Bedrock Studios | — | — | 1 |
| Bellini Industries | — | — | 1 |
| Benetone Hillin Entertainment | 2011 | — | 1 |
| Bento Box Entertainment | 2009 | — | 1 |
| Biz Television | 2011 | — | 1 |
| Blizzard Entertainment | February 8, 1991 | — | 1 |
| Blondie Girl Productions | — | — | 1 |
| Bloomberg L.P. | October 1981 | — | 1 |
| Blowback Productions | 1988 | — | 1 |
| Blue Omega | 2003 | June 26, 2009 | 1 |
| Bobbs-Merrill Company | 1850 | — | 1 |
| Brainfeeder | 2008 | — | 1 |
| Brave Man Media | — | — | 1 |
| Broken Swing Productions | 2010 | — | 1 |
| Brownstone Productions | October 16, 2002 | — | 1 |
| Bruce Seven Productions | — | — | 1 |
| Brunswick Corporation | September 15, 1845 | — | 1 |
| Bunim/Murray Productions | — | — | 1 |
| BuzzFeed Studios | — | — | 1 |
| C-Hundred Film Corporation | 1996 | — | 1 |
| C1R | 1998 | — | 1 |
| Cactus Jack Records | 2017 | — | 1 |
| Cal Vista International | — | — | 1 |
| California Motion Picture Corporation | 1911 | 1920 | 1 |
| Capa Productions | — | — | 1 |
| Carson Entertainment | 1980 | — | 1 |
| Casablanca Records | 1973 | — | 1 |
| Cedar Park Entertainment | — | — | 1 |
| Center for Asian American Media | 1980 | — | 1 |
| Center for Investigative Reporting | 1977 | — | 1 |
| Chaplin-Mayer Pictures Company | 1920 | — | 1 |
| Chenault Productions | — | — | 1 |
| China Organ Harvest Research Center | April 18, 2017 | — | 1 |
| Christie Film Company | 1916 | — | 1 |
| Chuck E. Cheese | May 17, 1977 | — | 1 |
| Cinecom Pictures | 1982 | 1991 | 1 |
| Cinemassacre Productions | 2004 | — | 1 |
| Citadel Entertainment | 1988 | — | 1 |
| Citizens Commission on Human Rights | 1969 | — | 1 |