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Houghton Mifflin Harcourt Co. 
 MA
  SEC # 1580156


        
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The Company    Business    Risk Factors    Competition    Management    Stockholders
 
 
2/24/22 
2/25/21 
 
 10-K
 10-K
 
2/24/22 
11/4/21 
8/5/21 
5/6/21 
2/25/21 
11/25/20 
11/17/20 
11/5/20 
8/6/20 
 
 10-K
 10-Q
 10-Q
 10-Q
 10-K
 424B3
 S-3
 10-Q
 10-Q
 
 
3/22/21 
 
 DEF 14A
 



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