| Feb 11, 2019 AForm 4 → | Feb 13, 4:34 pm EST | LIGAND PHARMACEUTICALS INCLGND | 3,202 | — | — | 45,897 | — | plan? |
| Jan 23, 2019 AForm 4 → | Jan 25, 4:32 pm EST | LIGAND PHARMACEUTICALS INCLGND | 2,782 | — | — | 42,695 | — | plan? |
| Jan 10, 2019 MForm 4 → | Jan 14, 9:17 am EST | LIGAND PHARMACEUTICALS INCLGND | 2,850 | $65.62 | $187,029 | 39,913 | — | plan? |
| Dec 17, 2018 MForm 4 → | Dec 17, 7:58 pm EST | LIGAND PHARMACEUTICALS INCLGND | 3,400 | $21.92 | $74,528 | 37,063 | — | plan? |
| Oct 24, 2018 MForm 4 → | Oct 25, 5:44 pm EDT | LIGAND PHARMACEUTICALS INCLGND | 3,900 | $16.79 | $65,462 | 33,663 | — | plan? |
| Oct 11, 2018 MForm 4 → | Oct 12, 6:52 pm EDT | LIGAND PHARMACEUTICALS INCLGND | 2,000 | $14.47 | $28,940 | 29,763 | — | plan? |
| Sep 17, 2018 SForm 4 → | Sep 18, 6:16 pm EDT | LIGAND PHARMACEUTICALS INCLGND | 2,813 | $250.69 | $705,181 | 27,763 | −9.20% | plan? |
| Sep 17, 2018 MForm 4 → | Sep 18, 6:16 pm EDT | LIGAND PHARMACEUTICALS INCLGND | 2,813 | $100.38 | $282,369 | 30,576 | — | plan? |
| Sep 4, 2018 SForm 4 → | Sep 5, 8:00 pm EDT | LIGAND PHARMACEUTICALS INCLGND | 19,417 | $254.99 | $4,951,065 | 27,763 | −41.2% | plan? |
| Sep 4, 2018 MForm 4 → | Sep 5, 8:00 pm EDT | LIGAND PHARMACEUTICALS INCLGND | 19,417 | $69.98 | $1,358,796 | 47,180 | — | plan? |
| Jun 29, 2018 JForm 4 → | Jul 3, 3:27 pm EDT | LIGAND PHARMACEUTICALS INCLGND | 180 | $117.84 | $21,210 | 27,763 | — | plan? |
| Mar 2, 2018 AFForm 4 → | Mar 6, 6:36 pm EST | LIGAND PHARMACEUTICALS INCLGND | 3,308 | $165.87 | $65,021 | 27,583 | — | plan? |
| Feb 15, 2018 FForm 4 → | Feb 16, 5:40 pm EST | LIGAND PHARMACEUTICALS INCLGND | 1,036 | $157.18 | $162,838 | 25,059 | — | plan? |
| Dec 28, 2017 AFForm 4 → | Dec 29, 9:16 pm EST | LIGAND PHARMACEUTICALS INCLGND | 4,022 | $138.66 | $162,926 | 26,095 | — | plan? |
| Aug 9, 2017 SForm 4 → | Aug 10, 6:40 pm EDT | LIGAND PHARMACEUTICALS INCLGND | 18,625 | $126.96 | $2,364,671 | 24,423 | −43.3% | plan? |
| Jun 30, 2017 JForm 4 → | Jul 5, 6:45 pm EDT | LIGAND PHARMACEUTICALS INCLGND | 243 | $87.13 | $21,171 | 43,048 | — | plan? |
| Feb 24, 2017 AForm 4 → | Feb 28, 6:28 pm EST | LIGAND PHARMACEUTICALS INCLGND | 4,878 | — | — | 42,805 | — | plan? |
| Aug 5, 2016 SForm 4 → | Aug 9, 4:58 pm EDT | LIGAND PHARMACEUTICALS INCLGND | 22,067 | $123.16 | $2,717,772 | 29,647 | −42.7% | plan? |
| Aug 5, 2016 MForm 4 → | Aug 9, 4:58 pm EDT | LIGAND PHARMACEUTICALS INCLGND | 30,347 | $54.76 | $1,661,857 | 37,927 | — | plan? |
| Feb 11, 2016 AForm 4 → | Feb 16, 7:33 pm EST | LIGAND PHARMACEUTICALS INCLGND | 2,193 | — | — | 29,647 | — | plan? |
| Jul 10, 2015 SForm 4 → | Jul 14, 7:35 pm EDT | LIGAND PHARMACEUTICALS INCLGND | 14,067 | $99.14 | $1,394,610 | 26,454 | −34.7% | plan? |
| Jul 10, 2015 MForm 4 → | Jul 14, 7:35 pm EDT | LIGAND PHARMACEUTICALS INCLGND | 15,067 | $15.38 | $231,787 | 27,454 | — | plan? |
| Jun 30, 2015 JForm 4 → | Jul 1, 12:36 pm EDT | LIGAND PHARMACEUTICALS INCLGND | 465 | $45.67 | $21,237 | 26,454 | — | plan? |
| Mar 16, 2015 MForm 4 → | Mar 18, 4:32 pm EDT | LIGAND PHARMACEUTICALS INCLGND | 5,264 | $20.32 | $106,939 | 30,119 | — | plan? |
| Mar 16, 2015 SForm 4 → | Mar 18, 4:32 pm EDT | LIGAND PHARMACEUTICALS INCLGND | 11,264 | $74.54 | $839,649 | 25,989 | −30.2% | plan? |
| Feb 10, 2015 AForm 4 → | Feb 11, 8:05 pm EST | LIGAND PHARMACEUTICALS INCLGND | 4,556 | — | — | 31,989 | — | plan? |
| Dec 31, 2014 JForm 4/A → | Mar 18, 2015, 4:28 pm EDT | LIGAND PHARMACEUTICALS INCLGND | 126 | $45.23 | $5,699 | 27,433 | — | plan? |
| Dec 31, 2014 PForm 4 → | Jan 5, 2015, 7:47 pm EST | LIGAND PHARMACEUTICALS INCLGND | 126 | $45.23 | $5,699 | 27,433 | +0.46% | plan? amended |