 W & R Chambers USA | 1 | 1992 |
 W Books Netherlands | 3 | 2012 - 2020 |
 W&N UK | 1 | 2017 |
| W. & A. K. Johnston Ltd. UK | 1 | 1953 |
| W. & G. Foyle UK | 1 | 1960 |
| W. & R. Chambers Limited UK | 1 | 1896 |
 W. C. Chewett & Co. Canada | 1 | 1866 |
| W. D. & H. O. Wills UK | 2 | 1933 - 1936 |
| W. D. Gray USA | 1 | 1917 |
| W. E. Scull USA | 1 | 1901 |
 W. Fischer-Verlag Germany | 95 | 1955 - 1983 |
| W. Foulsham And Co. UK | 9 | 1911 - 1998 |
| W. Girardet, Essen Germany | 1 | 1966 |
| W. H. Allen UK | 49 | 1953 - 1988 |
| W. H. Allen & Co. UK | 1 | 1890 |
| W. Kohlhammer Germany | 1 | 2005 |
| W. L. Griffin Printing Limited Canada | 1 | 1990 |
| W. Lane UK | 1 | 1797 |
| W. Ludwig Verlag Germany | 2 | 1982 - 1983 |
| W. Möhring KG Germany | 2 | 1963 |
| W. O. K. Books Canada | 1 | 1972 |
| W. Quay Hays USA | 1 | 1997 |
| W. Spemann Germany | 1 | 1887 |
| W. W. Norton UK | 1 | 2010 |
| W. W. Norton & Company USA | 70 | 1940 - 2024 |
| W. W. Norton & Company Canada | 1 | 1954 |
| W.G. Elliott UK | 1 | 2000 |
| W.H. Allen UK | 2 | 1963 - 1986 |
| W.H. Freeman And Company USA | 3 | 1992 - 1998 |
| W.H. Smith UK | 3 | 1984 - 1991 |
| W.J. Thieme & Cie Netherlands | 1 | 1953 |
| W3 Publications UK | 2 | 2004 - 2009 |
| Waanders Uitgeverij Netherlands | 2 | 2007 |
| Wachholz Germany | 1 | 2014 |
| Wachturm Bibel Germany | 2 | 1973 - 1975 |
| Wadden-Agenda Netherlands | 14 | 2016 - 2018 |
| Wadsworth Publishing Company USA | 2 | 1990 - 2009 |
| Wagenbach Germany | 1 | 2017 |
| Wagon Wheel Books UK | 4 | 1961 |
 Wahlström Sweden | 4 | 1984 - 1996 |
| Wahlström & Widstrand Sweden | 50 | 1943 - 2023 |
 Wahlström & Widstrand Norway | 1 | 1995 |
| Wahlströms Sweden | 44 | 1965 - 1998 |
| Wahlströms Fantasy Sweden | 13 | 1996 - 2005 |
| Wahlströms Ponnyklubb Sweden | 2 | 1976 - 1983 |
 Wakefield Press Australia | 1 | 1987 |
| Wala Druck- U. Verlagshaus, Frankfurt A. M. Germany | 1 | 1957 |
| Walburg Pers Netherlands | 2 | 2013 - 2014 |
 Walde+Graf Switzerland | 1 | 2011 |
| Waldheim-Eberle Germany | 1 | 1978 |
| Waldia Sweden | 1 | 1975 |
| Walker UK | 9 | 1999 - 2018 |
| Walker & Co. USA | 2 | 1970 - 1972 |
| Walker And Co. USA | 3 | 1970 - 2005 |
| Walker And Company USA | 1 | 1976 |
| Walker Books UK | 17 | 1993 - 2023 |
| Walker Books Australia | 2 | 2017 - 2019 |
| Wallaby USA | 6 | 1977 - 1982 |
| Wallace-Homestead Book Company USA | 1 | 1979 |
| Wallflower USA | 1 | 2012 |
| Wallflower Press USA | 2 | 2009 - 2014 |
| Wallflower Press International | 1 | 2012 |
| Wallstein Germany | 1 | 2017 |
| Walpole Dispensaries And Botanic Pharmacy Ltd. UK | 1 | |
| Walrus Books USA | 1 | 2001 |
| Walsall Local History Centre UK | 1 | 1997 |
| Walter C. Allen USA | 1 | 1966 |
| Walter De Gruyter & Co. Germany | 2 | 1955 - 1964 |
| Walter Dorn Verlag, Bremen-Horn Und Hannover Germany | 2 | 1946 |
| Walter Hädecke Verlag, Stuttgart Germany | 1 | 1936 |
| Walter J. Johnson/Theatrum Orbis Terrarum International | 1 | 1975 |
| Walter Scott UK | 3 | 1884 - 1893 |
| Walter Scott Publishing Co. UK | 1 | 1915 |
| Walter Verlag Germany | 1 | 1990 |
| Walther König Germany | 2 | 2008 |
| Walther König UK | 1 | 2012 |
| Walther König USA | 1 | 2010 |
| Walthers USA | 1 | 1997 |
| Wanderer Books USA | 6 | 1979 - 1984 |
| Wandering Star UK | 1 | 2002 |
| War Resisters League USA | 1 | 1967 |
| Ward Lock UK | 3 | 1962 - 1964 |
| Ward Lock & Co UK | 21 | 1886 - 1963 |
| Ward Lock & Co. UK | 1 | |
| Ward Lock Ltd. UK | 1 | 1980 |
| Ward, Lock UK | 1 | 1955 |
| Ward, Lock & Co., Limited UK | 7 | 1907 - 1967 |
| Ward, Lock & Co., Limited, London And Melbourne. UK | 1 | |
| Ward, Lock And Tyler UK | 1 | |
| Ward, Lock, Bowden & Co. UK | 1 | 1892 |
| Warne UK | 2 | 1983 - 1985 |
| Warner USA | 110 | 1973 - 2007 |
| Warner UK | 24 | 1992 - 2001 |
| Warner International | 2 | 2000 - 2006 |
| Warner / Aspect USA | 17 | 1995 - 2001 |
| Warner / Popular Library / Questar USA | 3 | 1988 - 1990 |
| Warner / Questar USA | 12 | 1989 - 1994 |
| Warner Books USA | 12 | 1977 - 1999 |
| Warner Books Canada | 1 | 1976 |
| Warner Books / Hamlyn Paperbacks UK | 1 | 1979 |
| Warner Books / New English Library UK | 1 | 1978 |
| Warner Books / Suron International UK | 1 | 1981 |
| Warner Books / Wyndham UK | 1 | 1977 |
| Warner Books, Inc. / Hamlyn UK | 2 | 1979 |
| Warner Bros. Music USA | 1 | 1965 |
| Warner Bros. Publications USA | 6 | 1970 - 1989 |
| Warner Chappell UK | 1 | 1991 |
| Warner Futura UK | 2 | 1992 - 1993 |
| Warner Paperback Library USA | 67 | 1972 - 1975 |
| Warner Press USA | 1 | 1939 |
| Warner Vision USA | 2 | 2001 - 2003 |
| Wartberg Verlag Germany | 2 | 1993 - 2007 |
| Washington Square Press USA | 20 | 1959 - 2009 |
| Washington State University Press USA | 6 | 1990 - 2003 |
| Watchtower Bible USA | 1 | 1971 |
| Watchtower Bible Germany | 1 | 1968 |
| Water Row Press USA | 1 | 1986 |
| Waterlow UK | 1 | 1992 |
| Watermill Press USA | 1 | 1992 |
| Waterside Publishing USA | 1 | 2019 |
| Waterstone's UK | 1 | 2008 |
| Watkins Publishing UK | 3 | 2005 - 2013 |
| Watkins Publishing International | 1 | 2009 |
| Watson UK | 3 | 2007 - 2011 |
| Watson-Guptil Publications USA | 3 | 2000 - 2019 |
| Waverley Properties Canada | 1 | 1980 |
| Wax Hound Press USA | 1 | 2022 |
| Wayland UK | 2 | 1994 - 2004 |
| Wayne State University Press USA | 5 | 1994 - 2016 |
| Wayne Tasse Canada | 1 | 1994 |
| Wayner Publications USA | 1 | 1971 |
| WayZGoose UK | 1 | 2001 |
| WDL Books UK | 23 | 1950 - 1960 |
| WE Inc. USA | 2 | 1969 |
 WEA Finland | 1 | 2008 |
| Wearside Books UK | 1 | 1994 |
| Weatherglass UK | 1 | 2021 |
| Weatherhill USA | 1 | 1995 |
| Webb & Bower UK | 2 | 1980 - 1990 |
| Webster's UK | 1 | 1924 |
| Wednesday Publishing UK | 1 | 1995 |
| Wee Ginger Dug UK | 1 | 2016 |
| Wee Ginger Dug Books UK | 2 | 2015 |
| Weichert Germany | 5 | 1935 - 1988 |
| Weidenfeld & Nicolson UK | 98 | 1954 - 2023 |
| Weidenfeld & Nicolson USA | 1 | 1988 |
| Weijmers Bokförlag Sweden | 1 | 1911 |
| Weilin+Göös Finland | 2 | 1970 - 1982 |
| Weiss Germany | 1 | 1959 |
| Weitbrecht Germany | 5 | 1984 - 2002 |
| Welbeck UK | 9 | 2020 - 2023 |
| Welbeck Music UK | 1 | 1970 |
| Welbeck Publishing Group UK | 2 | 2020 |
| Welcome Rain USA | 3 | 1998 - 2001 |
| Weldon Owen USA | 3 | 2020 - 2023 |
| Welt Germany | 1 | 2006 |
| Weltbild Germany | 176 | 1990 - 2019 |
 Weltbild Czech Republic | 9 | 2009 |
 Weltbild Europe | 4 | 2007 - 2015 |
 Weltbild Austria | 6 | 1989 - 1990 |
| Weltbild Verlag Germany | 9 | 1993 - 2013 |
| Weltbund-Verlag, Hamburg Germany | 2 | 1922 - 1927 |
| Weltenhüter Verlag Germany | 1 | 2002 |
| Weltkreis-Verlag, Dortmund Germany | 2 | 1977 - 1985 |
| Weltspiegel-Verlag, Stuttgart Germany | 1 | 1960 |
| Wenner Books USA | 1 | 2005 |
| Wennerbergs Förlag Sweden | 7 | 1956 - 1984 |
| Wenschow-Franzis-Druck GmbH München Germany | 1 | 1990 |
| Wereldbibliotheek Netherlands | 1 | 2001 |
| Werner Hörnemann Verlag Germany | 1 | 1970 |
| Werner Laurie Ltd UK | 1 | 1956 |
| Wesley Fox USA | 1 | 1980 |
| Wesleyan Conference Office UK | 1 | 1872 |
| Wesleyan University Press USA | 14 | 1972 - 2017 |
| West Central Printing Co. UK | 1 | 1978 |
| West Dumbartonshire Libraries & Museums UK | 1 | 2000 |
| West Publishing Company USA | 3 | 1985 - 1994 |
| West Virginia University Press USA | 1 | 2012 |
| West-Friesland Netherlands | 1 | 1956 |
| Westbury Marketing UK | 1 | 1981 |
| Westend Germany | 1 | 2017 |
| Westermann Germany | 14 | 1934 - 1997 |
| Westermann - Hermes Germany | 1 | 1982 |
| Western Islands USA | 1 | 1971 |
| Western National Parks Association USA | 1 | 2005 |
| Western Pacific Railroad USA | 2 | 1957 - 1982 |
| Western Producer Prairie Books Canada | 3 | 1975 - 1982 |
| Western Publishers Canada | 1 | 1984 |
| Western Publishing USA | 49 | 1951 - 1995 |
| Western Publishing Company, Inc. USA | 4 | 1969 - 1993 |
| Western Railroader USA | 6 | 1960 - 1997 |
| Western Reserve USA | 5 | 2018 - 2020 |
| Western Tract Mission Canada | 1 | 1975 |
| Westinghouse Electric & Manufacturing Company USA | 1 | 1938 |
| Westminster Company Canada | 3 | 1906 - 1910 |
| Westminster John Knox Press USA | 1 | 2006 |
| Westrail Publications USA | 1 | 1987 |
| Westview Press USA | 1 | 1979 |
| Westzone Publishing UK | 1 | 2001 |
| Weyler Sweden | 1 | 2013 |