| Feb 28, 2019 FMForm 4 → | Mar 4, 8:51 pm EST | Houghton Mifflin Harcourt CoHMHC | 9,415 | $7.96 | $16,917 | 33,747 | — | plan? |
| Feb 27, 2019 FMForm 4 → | Mar 1, 8:11 pm EST | Houghton Mifflin Harcourt CoHMHC | 9,625 | $8.49 | $21,072 | 28,580 | — | plan? |
| May 9, 2018 FMForm 4 → | May 11, 1:28 pm EDT | Houghton Mifflin Harcourt CoHMHC | 11,977 | $6.95 | $20,864 | 21,705 | — | plan? |
| Mar 3, 2018 FMForm 4 → | Mar 6, 8:39 pm EST | Houghton Mifflin Harcourt CoHMHC | 1,839 | $6.85 | $3,514 | 15,732 | — | plan? |
| Mar 1, 2018 FMForm 4 → | Mar 5, 5:52 pm EST | Houghton Mifflin Harcourt CoHMHC | 2,268 | $6.65 | $4,209 | 13,424 | — | plan? |
| Feb 28, 2018 FMForm 4/A → | Mar 6, 8:36 pm EST | Houghton Mifflin Harcourt CoHMHC | 7,847 | $6.80 | $14,899 | 13,917 | — | plan? |
| Feb 28, 2018 FMForm 4 → | Mar 2, 8:41 pm EST | Houghton Mifflin Harcourt CoHMHC | 7,847 | $6.80 | $14,899 | 12,422 | — | plan? amended |
| May 9, 2017 FMForm 4 → | May 11, 9:47 pm EDT | Houghton Mifflin Harcourt CoHMHC | 12,345 | $12.95 | $43,642 | 8,957 | — | plan? |
| Mar 3, 2017 FMForm 4 → | Mar 7, 9:54 pm EST | Houghton Mifflin Harcourt CoHMHC | 1,829 | $10.55 | $5,296 | 3,352 | — | plan? |
| Mar 1, 2017 FMForm 4 → | Mar 3, 9:40 pm EST | Houghton Mifflin Harcourt CoHMHC | 2,253 | $11.00 | $6,798 | 4,480 | — | plan? |
| Jan 31, 2017 FMForm 4 → | Feb 2, 8:42 pm EST | Houghton Mifflin Harcourt CoHMHC | 961 | $11.30 | $3,028 | 2,373 | — | plan? |
| Mar 7, 2016 SForm 4 → | Mar 7, 8:56 pm EST | Houghton Mifflin Harcourt CoHMHC | 775 | $19.85 | $15,384 | 863 | −47.3% | plan? |
| Mar 3, 2016 FMForm 4 → | Mar 7, 8:56 pm EST | Houghton Mifflin Harcourt CoHMHC | 1,879 | $19.77 | $10,913 | 1,638 | — | plan? |
| Feb 25, 2016 SForm 4 → | Feb 29, 6:28 pm EST | Houghton Mifflin Harcourt CoHMHC | 10,000 | $18.50 | $185,000 | 863 | −92.1% | plan? |
| Feb 25, 2016 MForm 4 → | Feb 29, 6:28 pm EST | Houghton Mifflin Harcourt CoHMHC | 10,000 | $12.50 | $125,000 | 10,863 | — | plan? |
| Jan 31, 2016 FMForm 4/A → | Jul 7, 3:40 pm EDT | Houghton Mifflin Harcourt CoHMHC | 956 | $17.84 | $4,674 | 1,110 | — | plan? |
| Jan 31, 2016 FMForm 4 → | Feb 16, 9:45 pm EST | Houghton Mifflin Harcourt CoHMHC | 956 | $17.84 | $4,674 | 863 | — | plan? late amended |
| Feb 4, 2015 SForm 5 → | Feb 14, 2017, 3:52 pm EST | Houghton Mifflin Harcourt CoHMHC | 863 | $18.75 | $16,180 | 1,085 | −44.3% | plan? |
| May 13, 2014 SForm 5 → | Feb 16, 2016, 9:44 pm EST | Houghton Mifflin Harcourt CoHMHC | 33,000 | $20.37 | $672,208 | 431 | −98.7% | plan? |
| May 13, 2014 FMForm 5 → | Feb 16, 2016, 9:44 pm EST | Houghton Mifflin Harcourt CoHMHC | 33,955 | $12.94 | $430,396 | 6,931 | — | plan? |