| Feb 19, 2019 GForm 4 → | Feb 22, 7:52 am EST | HUDSON TECHNOLOGIES INC /NYHDSN | 7,500 | — | — | 1,278,981 | — | plan? late |
| Apr 26, 2018 GForm 5 → | Jan 15, 2019, 7:35 am EST | HUDSON TECHNOLOGIES INC /NYHDSN | 10,000 | — | — | 1,286,481 | — | plan? |
| Mar 15, 2018 PForm 4 → | Mar 16, 5:03 pm EDT | HUDSON TECHNOLOGIES INC /NYHDSN | 2,000 | $5.51 | $11,020 | 1,296,481 | +0.15% | plan? |
| Dec 29, 2017 GForm 5 → | Jan 18, 2018, 9:41 am EST | HUDSON TECHNOLOGIES INC /NYHDSN | 10,000 | — | — | 1,644,299 | — | plan? |
| Sep 11, 2017 FGMForm 4 → | Nov 20, 8:25 am EST | HUDSON TECHNOLOGIES INC /NYHDSN | 178,592 | $2.22 | $386,140 | 1,502,481 | — | plan? late |
| Jun 5, 2017 FGMForm 4 → | Aug 22, 5:59 pm EDT | HUDSON TECHNOLOGIES INC /NYHDSN | 169,188 | $5.20 | $853,950 | 1,557,073 | — | plan? late |
| Dec 24, 2016 GForm 5 → | Feb 6, 2017, 9:52 pm EST | HUDSON TECHNOLOGIES INC /NYHDSN | 21,300 | — | — | 1,621,261 | — | plan? |
| Sep 23, 2016 GForm 4 → | Sep 26, 6:00 pm EDT | HUDSON TECHNOLOGIES INC /NYHDSN | 15,700 | — | — | 881,000 | — | plan? |
| Aug 10, 2016 SForm 4 → | Aug 11, 5:23 pm EDT | HUDSON TECHNOLOGIES INC /NYHDSN | — | — | — | 881,000 | — | plan? |
| Aug 10, 2016 SForm 4 → | Aug 11, 5:23 pm EDT | HUDSON TECHNOLOGIES INC /NYHDSN | 28,258 | $4.97 | $140,527 | 773,661 | −3.52% | plan? |
| Aug 9, 2016 SForm 4 → | Aug 9, 6:19 pm EDT | HUDSON TECHNOLOGIES INC /NYHDSN | — | — | — | 881,000 | — | plan? |
| Aug 9, 2016 SForm 4 → | Aug 9, 6:19 pm EDT | HUDSON TECHNOLOGIES INC /NYHDSN | 271,742 | $4.90 | $1,331,536 | 801,999 | −25.3% | plan? |
| Jun 24, 2016 GForm 4 → | Jun 27, 4:14 pm EDT | HUDSON TECHNOLOGIES INC /NYHDSN | 7,000 | — | — | 731,000 | — | plan? |
| Feb 4, 2016 GForm 4/A → | Jun 27, 4:27 pm EDT | HUDSON TECHNOLOGIES INC /NYHDSN | 7,000 | — | — | 731,000 | — | plan? |
| Feb 4, 2016 GForm 4 → | Feb 8, 5:00 pm EST | HUDSON TECHNOLOGIES INC /NYHDSN | 7,000 | — | — | 731,000 | — | plan? amended |
| Dec 29, 2015 GForm 4 → | Dec 31, 12:11 pm EST | HUDSON TECHNOLOGIES INC /NYHDSN | 10,000 | — | — | 731,000 | — | plan? |
| Jul 9, 2015 GForm 4 → | Jul 13, 5:49 pm EDT | HUDSON TECHNOLOGIES INC /NYHDSN | 15,000 | — | — | 731,000 | — | plan? |
| Jun 18, 2015 GForm 4 → | Jun 22, 4:16 pm EDT | HUDSON TECHNOLOGIES INC /NYHDSN | 7,000 | — | — | 731,000 | — | plan? |
| Jun 11, 2015 MForm 4 → | Jun 12, 7:50 pm EDT | HUDSON TECHNOLOGIES INC /NYHDSN | 91,900 | $1.58 | $145,423 | 731,000 | — | plan? |
| May 6, 2015 SForm 4 → | May 8, 5:14 pm EDT | HUDSON TECHNOLOGIES INC /NYHDSN | — | — | — | 822,900 | — | plan? |
| May 6, 2015 SForm 4 → | May 8, 5:14 pm EDT | HUDSON TECHNOLOGIES INC /NYHDSN | 65,100 | $4.49 | $292,494 | 1,027,761 | −5.96% | plan? |
| Mar 13, 2015 SForm 4/A → | Mar 24, 4:43 pm EDT | HUDSON TECHNOLOGIES INC /NYHDSN | — | — | — | 822,900 | — | plan? |
| Mar 13, 2015 SForm 4 → | Mar 13, 5:27 pm EDT | HUDSON TECHNOLOGIES INC /NYHDSN | 14,927 | $4.26 | $63,589 | 822,900 | — | plan? amended |
| Mar 12, 2015 SForm 4/A → | Mar 24, 4:43 pm EDT | HUDSON TECHNOLOGIES INC /NYHDSN | 75,384 | $4.28 | $322,950 | 1,092,861 | −6.45% | plan? |
| Mar 12, 2015 SForm 4 → | Mar 13, 5:27 pm EDT | HUDSON TECHNOLOGIES INC /NYHDSN | 60,457 | $4.29 | $259,361 | 1,107,788 | −5.18% | plan? amended |
| Mar 10, 2015 SForm 4 → | Mar 12, 5:23 pm EDT | HUDSON TECHNOLOGIES INC /NYHDSN | 1,800 | $4.52 | $8,136 | 1,177,245 | −0.15% | plan? |
| Jan 22, 2015 GForm 4 → | Jan 23, 5:01 pm EST | HUDSON TECHNOLOGIES INC /NYHDSN | 3,000 | — | — | 822,900 | — | plan? |
| Jan 15, 2015 GForm 4 → | Jan 16, 5:10 pm EST | HUDSON TECHNOLOGIES INC /NYHDSN | 13,500 | — | — | 822,900 | — | plan? |
| Dec 31, 2014 GForm 4 → | Jan 2, 2015, 5:35 pm EST | HUDSON TECHNOLOGIES INC /NYHDSN | 33,000 | — | — | 443,000 | — | plan? |
| Mar 12, 2014 GSForm 4 → | Mar 12, 2015, 5:23 pm EDT | HUDSON TECHNOLOGIES INC /NYHDSN | 9,000 | — | — | 822,900 | — | plan? late |