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ESSEX INVESTMENT MANAGEMENT CO LLC
> GEOS
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 06/30/2023 | GEOSPACE TECHNOLOGIES CORP | GEOS | 90,993 | 2,456 | 707,016,000 | 82,830,000 | $7,770.00 |
| 03/31/2023 | GEOSPACE TECHNOLOGIES CORP | GEOS | 88,537 | 0 | 624,186,000 | 623,812,000 | $7,050.00 |
| 12/31/2022 | GEOSPACE TECHNOLOGIES CORP | GEOS | 88,537 | 1 | 374,000 | -16,000 | $4.22 |
| 09/30/2022 | GEOSPACE TECHNOLOGIES CORP | GEOS | 88,536 | -5,898 | 390,000 | -58,000 | $4.40 |
| 06/30/2022 | GEOSPACE TECHNOLOGIES CORP | GEOS | 94,434 | 94,434 | 448,000 | 448,000 | $4.74 |
| 03/31/2014 | GEOSPACE TECHNOLOGIES CORP | GEOS | 0 | -5,000 | 0 | -473,000 | |
| 12/31/2013 | GEOSPACE TECHNOLOGIES CORP | GEOS | 5,000 | 5,000 | 473,000 | 473,000 | $94.60 |
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