Education Media and Publishing Group (Ireland/Cayman Islands) (name changed from Houghton Mifflin Riverdeep Group 2007; name changed from HM Rivergroup 2007; HM Rivergroup formed by Riverdeep to acquire Riverdeep Holdings and Houghton Mifflin 2006)
 

 
Houghton Mifflin (acq. by Riverdeep Holdings/HM Rivergroup from Thomas H. Lee Partners, Bain Capital, and Blackstone Group 2006) (acq. by Thomas H. Lee (partial stake), Bain Capital (partial stake), and Blackstone Group (minority share) from Vivendi Universal 2002)
 

* Trade & Reference Division
	* Mariner
	* Houghton Mifflin Books for Children
	* Walter Lorraine Books
	* Clarion Books (acq. by Houghton Mifflin 1979) (founded 1965)
	* Kingfisher Books
	* Graphia (formed by Houghton Mifflin 2004)
* Houghton Mifflin Harcourt Publishing Co. (Harcourt Education acq. by Houghton Mifflin Riverdeep from Reed Elsevier 2007) (Harcourt General acq. by Reed Elsevier 2001) (name changed to Harcourt Inc. 1999) (Harcourt Brace Jovanovich acq. by General Cinema 1991) (name changed to Harcourt Brace Jovanovich 1970) (Harcourt Brace acq. World Book 1960; name changed to Harcourt Brace & World) (Harcourt Brace & Co. founded 1919)
	* Houghton Mifflin Harcourt School Publishers
	* Holt, Rinehart and Winston (acq. from Reed Elsevier 2007) (acq. by CBS 1967)
	* Harcourt Religion Publishers (acq. from Reed Elsevier 2007) (name changed from Brown-ROA Publishers 1999; acq. 1994)
	* Steck-Vaughn (acq. from Reed Elsevier 2007)
	* Rigby (acq. from Reed Elsevier 2007)
	* Saxon Publishers (acq. from Reed Elsevier 2007) (acq. by Reed Elsevier 2004) (founded 1981)
	* Heinemann USA (acq. from Reed Elsevier 2007) (formed 1978 by Heinemann UK)
	* Heinemann Library (acq. from Reed Elsevier 2007)
	* Harcourt Trade (acq. from Reed Elsevier 2007)
		* Harcourt (acq. from Reed Elsevier 2007)
		* Harvest Paperbacks (acq. from Reed Elsevier 2007)
		* Houghton Mifflin Harcourt Children's Book Group
			* Harcourt Children's Books (acq. from Reed Elsevier 2007)
			* Silver Whistle (acq. from Reed Elsevier 2007)
			* Red Wagon Books (acq. from Reed Elsevier 2007)
			* Harcourt Young Classics (acq. from Reed Elsevier 2007)
			* Green Light Readers (acq. from Reed Elsevier 2007)
			* Voyager Books/Libros Viajeros (acq. from Reed Elsevier 2007)
			* Harcourt Paperbacks (acq. from Reed Elsevier 2007)
			* Odyssey Classics (acq. from Reed Elsevier 2007)
			* Magic Carpet Books (acq. from Reed Elsevier 2007)
* HM Assessment Group
	* Riverside Publishing
		* Wintergreen Orchard House
	* Edusoft
* Houghton Mifflin
* McDougal Littell
* Larousse (France)
* Chambers (UK)
* Cognitive Concepts (acq. 2003)

***********************************************
Previous Holdings

Greenwood Press  (founded 1967) (acq. by Congressional Information Service 1976) (acq. by Reed Elsevier 1979) (acq. by Houghton Mifflin Riverdeep from Reed Elsevier 2007) (perpetual publishing license
    granted by Houghton Mifflin Harcourt to ABC-CLIO 2008)
Praeger Publishers (founded 1949) (acq. by Encyclopedia Britannica 1966) (acq. by CBS from
    Encyclopedia Britannica 1977) (acq. from Reed Elsevier 2007) (perpetual publishing license granted
    by Houghton Mifflin Harcourt to ABC-CLIO 2008)
Praeger Security International (perpetual publishing license granted by Houghton Mifflin Harcourt to ABC-CLIO
    2008)
American Council on Education (acq. from Reed Elsevier 2007) (perpetual publishing license granted by
    Houghton Mifflin Harcourt to ABC-CLIO 2008)
Libraries Unlimited (acq. by Reed Elsevier 2001) (acq. from Reed Elsevier 2007) (perpetual publishing license
    granted by Houghton Mifflin Harcourt to ABC-CLIO 2008)
Bowker-Greenwood (backlist included with Greenwood perpetual publishing license granted by Houghton Mifflin
    Harcourt to ABC-CLIO 2008) (backlist acq. from Reed Elsevier 2007) (discontinued by Greenwood)
    (formed 2001 from R.R. Bowker's Children's and Authored Books)
Oryx Press  (backlist included with Greenwood perpetual publishing license granted
    by Houghton Mifflin Harcourt to ABC-CLIO 2008) (backlist acq. from Reed Elsevier 2007) (discontinued by
    Greenwood) (acq. by Reed Elsevier 2000)
Ablex (backlist included with Greenwood perpetual publishing license granted by Houghton Mifflin Harcourt to
    ABC-CLIO 2008) (backlist acq. from Reed Elsevier 2007) (discontinued by Greenwood 2002) (founded
    1976)
Auburn House (backlist included with Greenwood perpetual publishing license granted by Houghton Mifflin
    Harcourt to ABC-CLIO 2008) (backlist acq. from Reed Elsevier 2007) (discontinued by Greenwood 2002)
Bergin & Garvey (backlist included with Greenwood perpetual publishing license granted by Houghton Mifflin
    Harcourt to ABC-CLIO 2008) (backlist acq. from Reed Elsevier 2007) (discontinued by Greenwood 2002)
Quorum (backlist included with Greenwood perpetual publishing license granted by Houghton Mifflin Harcourt to
    ABC-CLIO 2008) (backlist acq. from Reed Elsevier 2007) (discontinued by Greenwood 2002) (formed
    1980)
Houghton Mifflin College division (sold to Cengage Learning 2008)
Kingfisher (UK) (sold to von Holtzbrinck 2007)
 
 

         last updated February 6, 2009