| Mar 3, 2017 FForm 4 → | Mar 7, 8:28 pm EST | Houghton Mifflin Harcourt CoHMHC | 1,675 | $10.55 | $17,671 | 36,118 | — | plan? |
| Mar 1, 2017 FMForm 4 → | Mar 3, 9:39 pm EST | Houghton Mifflin Harcourt CoHMHC | 5,962 | $11.00 | $20,614 | 37,793 | — | plan? |
| Jan 31, 2017 FMForm 4 → | Feb 2, 8:41 pm EST | Houghton Mifflin Harcourt CoHMHC | 664 | $11.30 | $2,610 | 35,579 | — | plan? |
| Apr 27, 2016 SForm 4 → | Apr 28, 6:46 pm EDT | Houghton Mifflin Harcourt CoHMHC | 4,167 | $20.66 | $86,071 | 35,377 | −10.5% | plan? |
| Apr 27, 2016 MForm 4 → | Apr 28, 6:46 pm EDT | Houghton Mifflin Harcourt CoHMHC | 4,167 | $13.48 | $56,171 | 39,544 | — | plan? |
| Mar 29, 2016 SForm 4 → | Mar 30, 4:36 pm EDT | Houghton Mifflin Harcourt CoHMHC | 4,167 | $19.10 | $79,604 | 35,377 | −10.5% | plan? |
| Mar 29, 2016 MForm 4 → | Mar 30, 4:36 pm EDT | Houghton Mifflin Harcourt CoHMHC | 4,167 | $13.48 | $56,171 | 39,544 | — | plan? |
| Mar 3, 2016 FForm 4 → | Mar 7, 8:56 pm EST | Houghton Mifflin Harcourt CoHMHC | 1,845 | $19.77 | $36,476 | 35,377 | — | plan? |
| Feb 26, 2016 SForm 4 → | Mar 1, 6:53 pm EST | Houghton Mifflin Harcourt CoHMHC | 8,540 | $19.00 | $162,260 | 37,222 | −18.7% | plan? |
| Feb 26, 2016 MForm 4 → | Mar 1, 6:53 pm EST | Houghton Mifflin Harcourt CoHMHC | 8,334 | $13.48 | $112,342 | 38,766 | — | plan? |
| Jan 31, 2016 FMForm 4 → | Feb 2, 8:00 pm EST | Houghton Mifflin Harcourt CoHMHC | 661 | $17.84 | $4,050 | 37,428 | — | plan? |
| Dec 29, 2015 SForm 4 → | Dec 30, 4:37 pm EST | Houghton Mifflin Harcourt CoHMHC | 4,167 | $21.55 | $89,804 | 37,221 | −10.1% | plan? |
| Dec 29, 2015 MForm 4 → | Dec 30, 4:37 pm EST | Houghton Mifflin Harcourt CoHMHC | 4,167 | $13.48 | $56,171 | 41,388 | — | plan? |
| Nov 30, 2015 SForm 4 → | Dec 2, 1:03 pm EST | Houghton Mifflin Harcourt CoHMHC | 4,167 | $19.95 | $83,112 | 37,221 | −10.1% | plan? |
| Nov 30, 2015 MForm 4 → | Dec 2, 1:03 pm EST | Houghton Mifflin Harcourt CoHMHC | 4,167 | $13.48 | $56,171 | 41,388 | — | plan? |
| Oct 27, 2015 SForm 4 → | Oct 29, 5:33 pm EDT | Houghton Mifflin Harcourt CoHMHC | 4,167 | $19.28 | $80,332 | 37,221 | −10.1% | plan? |
| Oct 27, 2015 MForm 4 → | Oct 29, 5:33 pm EDT | Houghton Mifflin Harcourt CoHMHC | 4,167 | $13.48 | $56,171 | 41,388 | — | plan? |
| Sep 29, 2015 SForm 4 → | Oct 1, 4:07 pm EDT | Houghton Mifflin Harcourt CoHMHC | 4,167 | $20.28 | $84,527 | 37,221 | −10.1% | plan? |
| Sep 29, 2015 MForm 4 → | Oct 1, 4:07 pm EDT | Houghton Mifflin Harcourt CoHMHC | 4,167 | $13.48 | $56,171 | 41,388 | — | plan? |
| Aug 27, 2015 SForm 4 → | Aug 31, 7:43 pm EDT | Houghton Mifflin Harcourt CoHMHC | 4,166 | $22.77 | $94,851 | 37,221 | −10.1% | plan? |
| Aug 27, 2015 MForm 4 → | Aug 31, 7:43 pm EDT | Houghton Mifflin Harcourt CoHMHC | 4,166 | $13.48 | $56,158 | 41,387 | — | plan? |
| Jul 28, 2015 MForm 4/A → | Dec 2, 11:51 am EST | Houghton Mifflin Harcourt CoHMHC | 4,166 | $13.09 | $54,523 | 41,387 | — | plan? |
| Jul 28, 2015 SForm 4 → | Jul 30, 5:20 pm EDT | Houghton Mifflin Harcourt CoHMHC | 4,166 | $25.67 | $106,928 | 37,221 | −10.1% | plan? amended |
| Jul 28, 2015 MForm 4 → | Jul 30, 5:20 pm EDT | Houghton Mifflin Harcourt CoHMHC | 4,166 | $12.50 | $52,075 | 41,387 | — | plan? amended |
| Jun 29, 2015 SForm 4 → | Jun 30, 9:00 pm EDT | Houghton Mifflin Harcourt CoHMHC | 4,166 | $25.71 | $107,097 | 37,221 | −10.1% | plan? |
| Jun 29, 2015 MForm 4 → | Jun 30, 9:00 pm EDT | Houghton Mifflin Harcourt CoHMHC | 4,166 | $12.50 | $52,075 | 41,387 | — | plan? |
| May 27, 2015 SForm 4 → | May 29, 3:40 pm EDT | Houghton Mifflin Harcourt CoHMHC | 4,166 | $25.79 | $107,452 | 37,221 | −10.1% | plan? |
| May 27, 2015 MForm 4 → | May 29, 3:40 pm EDT | Houghton Mifflin Harcourt CoHMHC | 4,166 | $12.50 | $52,075 | 41,387 | — | plan? |
| Apr 24, 2015 SForm 4 → | Apr 28, 8:04 pm EDT | Houghton Mifflin Harcourt CoHMHC | 4,167 | $26.55 | $110,634 | 37,221 | −10.1% | plan? |
| Apr 24, 2015 MForm 4 → | Apr 28, 8:04 pm EDT | Houghton Mifflin Harcourt CoHMHC | 4,167 | $13.48 | $56,171 | 41,388 | — | plan? |
| Mar 27, 2015 SForm 4 → | Mar 31, 5:09 pm EDT | Houghton Mifflin Harcourt CoHMHC | 4,167 | $22.90 | $95,408 | 37,221 | −10.1% | plan? |
| Mar 27, 2015 MForm 4 → | Mar 31, 5:09 pm EDT | Houghton Mifflin Harcourt CoHMHC | 4,167 | $13.48 | $56,171 | 41,388 | — | plan? |
| Mar 3, 2015 AForm 4 → | Mar 5, 9:36 pm EST | Houghton Mifflin Harcourt CoHMHC | 37,015 | — | — | 37,221 | — | plan? |
| Feb 27, 2015 SForm 4 → | Mar 3, 8:02 pm EST | Houghton Mifflin Harcourt CoHMHC | 4,167 | $19.97 | $83,216 | 206 | −95.3% | plan? |
| Feb 27, 2015 MForm 4 → | Mar 3, 8:02 pm EST | Houghton Mifflin Harcourt CoHMHC | 4,167 | $13.48 | $56,171 | 4,373 | — | plan? |
| Jan 31, 2015 FMForm 4 → | Feb 3, 12:25 pm EST | Houghton Mifflin Harcourt CoHMHC | 660 | $19.68 | $4,467 | 206 | — | plan? |
| Jan 27, 2015 SForm 4 → | Jan 29, 4:37 pm EST | Houghton Mifflin Harcourt CoHMHC | 4,167 | $19.86 | $82,770 | 0 | −100% | plan? |
| Jan 27, 2015 MForm 4 → | Jan 29, 4:37 pm EST | Houghton Mifflin Harcourt CoHMHC | 4,167 | $13.48 | $56,171 | 4,167 | — | plan? |
| Nov 22, 2013 PForm 5 → | Feb 17, 2015, 2:15 pm EST | Houghton Mifflin Harcourt CoHMHC | 10 | $16.83 | $168 | 10 | — | plan? |