| 2024-05-20 | Sale | Gentex Corporation GNTX | director | 4,716 0.002% | $34.46 | $162,503 | -0.38% | |
| 2023-07-31 | Sale | Gentex Corporation GNTX | director | 4,416 0.002% | $33.52 | $148,043 | -1.49% | |
| 2013-03-11 | Sale | Quaker Chemical Corporation KWR | director | 7,006 0.0529% | $60.16 | $421,467 | +12.89% | |
| 2012-03-12 | Sale | Quaker Chemical Corporation KWR | director | 5,000 0.0388% | $37.65 | $188,250 | +24.05% | |
| 2010-08-02 | Sale | Quaker Chemical Corporation KWR | director | 5,810 0.052% | $36.12 | $209,842 | +10.48% | |
| 2009-11-30 | Sale | Quaker Chemical Corporation KWR | director | 2,081 0.0188% | $19.05 | $39,649 | +48.68% | |
| 2006-03-02 | Quaker Chemical Corporation KWR | director | 500 0.0052% | $20.28 | $10,140 | +0.89% | ||
| 2006-02-24 | Sale | Quaker Chemical Corporation KWR | director | 500 0.0051% | $19.87 | $9,935 | +0.37% |