| 2008-05-28 | Sale | EnerSys ENS | 10 percent owner | 529,198 9.5858% | $27.70 | $14.66M | -55.08% | |
| 2008-02-29 | Sale | EnerSys ENS | 10 percent owner | 717,070 14.664% | $22.40 | $16.06M | -0.09% | |
| 2007-12-03 | Sale | EnerSys ENS | 10 percent owner | 717,070 14.5421% | $22.92 | $16.44M | +2.12% | |
| 2007-07-05 | Sale | EnerSys ENS | 10 percent owner | 860,486 17.7296% | $18.05 | $15.53M | +24.6% | |
| 2006-12-12 | Sale | EnerSys ENS | 10 percent owner | 860,486 18.1715% | $16.02 | $13.78M | +10.26% |