The largest purchase of all time was on 2008-02-14 and amounted to 2000 shares of Geospace Technologies Corporation for $99,340.
The largest sale of all time was on 2011-02-09 and amounted to 6300 shares of Geospace Technologies Corporation for $646,459.
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| 2020-05-12 | Geospace Technologies Corporation GEOS | director | 2,000 0.015% | $6.29 | $12,580 | +22.87% | ||
| 2014-12-04 | Geospace Technologies Corporation GEOS | director | 1,000 0.0079% | $25.81 | $25,814 | -27.94% | ||
| 2011-02-09 | Sale | Geospace Technologies Corporation GEOS | director | 6,300 0.1016% | $102.61 | $646,459 | -15.13% | |
| 2008-12-10 | Geospace Technologies Corporation GEOS | director | 2,000 0.0325% | $16.24 | $32,480 | +23.02% | ||
| 2008-02-14 | Geospace Technologies Corporation GEOS | director | 2,000 0.0343% | $49.67 | $99,340 | -11.17% |