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ESSEX INVESTMENT MANAGEMENT CO LLC
> NTIC
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 06/30/2023 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 47,725 | 1,700 | 511,135,000 | -43,006,000 | $10,710.01 |
| 03/31/2023 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 46,025 | 0 | 554,141,000 | 553,528,000 | $12,040.00 |
| 12/31/2022 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 46,025 | 0 | 613,000 | 0 | $13.32 |
| 09/30/2022 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 46,025 | -3,156 | 613,000 | 153,000 | $13.32 |
| 06/30/2022 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 49,181 | 0 | 460,000 | -131,000 | $9.35 |
| 03/31/2022 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 49,181 | 1,201 | 591,000 | -143,000 | $12.02 |
| 12/31/2021 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 47,980 | 9,675 | 734,000 | 152,000 | $15.30 |
| 09/30/2021 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 38,305 | -693 | 582,000 | -93,000 | $15.19 |
| 06/30/2021 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 38,998 | 373 | 675,000 | 267,000 | $17.31 |
| 12/31/2020 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 38,625 | -23,044 | 408,000 | -104,000 | $10.56 |
| 09/30/2020 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 61,669 | -170 | 512,000 | 19,000 | $8.30 |
| 06/30/2020 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 61,839 | 0 | 493,000 | 35,000 | $7.97 |
| 03/31/2020 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 61,839 | -1,513 | 458,000 | -433,000 | $7.41 |
| 12/31/2019 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 63,352 | 2,260 | 891,000 | 142,000 | $14.06 |
| 09/30/2019 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 61,092 | 30,546 | 749,000 | 2,000 | $12.26 |
| 06/30/2019 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 30,546 | 12,814 | 747,000 | 273,000 | $24.45 |
| 03/31/2019 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 17,732 | 1,600 | 474,000 | -3,000 | $26.73 |
| 12/31/2018 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 16,132 | -1,219 | 477,000 | -125,000 | $29.57 |
| 09/30/2018 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 17,351 | 0 | 602,000 | -19,000 | $34.70 |
| 06/30/2018 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 17,351 | 0 | 621,000 | 227,000 | $35.79 |
| 03/31/2018 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 17,351 | -1,759 | 394,000 | -79,000 | $22.71 |
| 12/31/2017 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 19,110 | -3,864 | 473,000 | 92,000 | $24.75 |
| 09/30/2017 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 22,974 | 22,974 | 381,000 | 381,000 | $16.58 |
| 06/30/2013 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 0 | -30,521 | 0 | -410,000 | |
| 03/31/2013 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 30,521 | 30,521 | 410,000 | 410,000 | $13.43 |
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