| 2011-12-06 | Sale | Douglas Dynamics, Inc. PLOW | 10 percent owner | 1.51M 6.5708% | $14.25 | $21.58M | -6.07% | |
| 2011-05-20 | Sale | Douglas Dynamics, Inc. PLOW | 10 percent owner | 5.98M 25.9003% | $14.20 | $84.94M | -4.84% | |
| 2011-03-17 | Sale | Douglas Dynamics, Inc. PLOW | 10 percent owner | 3,262 0.0152% | $13.63 | $44,448 | +7.29% | |
| 2011-03-15 | Sale | Douglas Dynamics, Inc. PLOW | 10 percent owner | 559,232 2.6115% | $14.36 | $8.03M | +6.61% | |
| 2010-05-14 | Sale | Douglas Dynamics, Inc. PLOW | 10 percent owner | 1.42M 7.0803% | $10.49 | $14.94M | +27.06% | |
| 2010-05-10 | Sale | Douglas Dynamics, Inc. PLOW | 10 percent owner | 3.32M 16.5504% | $10.49 | $34.86M | +26.83% |