| 2011-11-30 | Sale | Douglas Dynamics, Inc. PLOW | 10 percent owner | 932,376 3.9591% | $14.25 | $13.29M | -8.07% | |
| 2011-05-20 | Sale | Douglas Dynamics, Inc. PLOW | 10 percent owner | 916,851 3.9698% | $14.20 | $13.02M | -4.84% | |
| 2011-03-14 | Sale | Douglas Dynamics, Inc. PLOW | 10 percent owner | 99,674 0.4679% | $14.60 | $1.45M | +5.44% | |
| 2011-03-11 | Sale | Douglas Dynamics, Inc. PLOW | 10 percent owner | 72,756 0.3412% | $14.56 | $1.06M | +5.73% | |
| 2010-05-14 | Sale | Douglas Dynamics, Inc. PLOW | 10 percent owner | 218,286 1.0852% | $10.49 | $2.29M | +27.06% | |
| 2010-05-10 | Sale | Douglas Dynamics, Inc. PLOW | 10 percent owner | 1.02M 5.0732% | $10.49 | $10.69M | +26.83% |