| 2012-11-13 | Sale | Douglas Dynamics, Inc. PLOW | director | 15,582 0.0724% | $13.15 | $204,909 | +11.74% | |
| 2012-08-13 | Sale | Douglas Dynamics, Inc. PLOW | director | 7,682 0.0353% | $13.71 | $105,311 | +6.36% | |
| 2012-08-10 | Sale | Douglas Dynamics, Inc. PLOW | director | 42,318 0.1941% | $13.95 | $590,535 | +4.13% | |
| 2012-08-06 | Sale | C.H. Robinson Worldwide, Inc. CHRW | director | 4,708 0.0029% | $53.82 | $253,377 | +11.47% | |
| 2010-05-14 | Sale | Douglas Dynamics, Inc. PLOW | director | 6,088 0.0303% | $10.49 | $63,863 | +27.06% | |
| 2010-05-10 | Sale | Douglas Dynamics, Inc. PLOW | director | 14,210 0.0708% | $10.49 | $149,063 | +26.83% | |
| 2005-11-28 | C.H. Robinson Worldwide, Inc. CHRW | director | 350 0.0002% | $40.85 | $14,298 | +10.36% | ||
| 2004-02-27 | C.H. Robinson Worldwide, Inc. CHRW | director | 1,000 0.0012% | $39.51 | $39,511 | +14.43% |