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WILEN INVESTMENT MANAGEMENT CORP.
> NTIC
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 09/30/2022 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 46,089 | -3,905 | 576,000 | 126,000 | $12.50 |
| 06/30/2022 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 49,994 | -3,800 | 450,000 | -169,000 | $9.00 |
| 03/31/2022 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 53,794 | -302 | 619,000 | -125,000 | $11.51 |
| 12/31/2021 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 54,096 | -1,600 | 744,000 | -91,000 | $13.75 |
| 09/30/2021 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 55,696 | -2,361 | 835,000 | -137,000 | $14.99 |
| 06/30/2021 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 58,057 | -2,200 | 972,000 | 98,000 | $16.74 |
| 03/31/2021 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 60,257 | -700 | 874,000 | 264,000 | $14.50 |
| 12/31/2020 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 60,957 | -11,940 | 610,000 | -10,000 | $10.01 |
| 09/30/2020 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 72,897 | -8,292 | 620,000 | 11,000 | $8.51 |
| 06/30/2020 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 81,189 | -4,702 | 609,000 | 51,000 | $7.50 |
| 03/31/2020 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 85,891 | -4,098 | 558,000 | -657,000 | $6.50 |
| 12/31/2019 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 89,989 | -5,505 | 1,215,000 | 93,000 | $13.50 |
| 09/30/2019 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 95,494 | 48,056 | 1,122,000 | -17,000 | $11.75 |
| 06/30/2019 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 47,438 | -1,400 | 1,139,000 | -106,000 | $24.01 |
| 03/31/2019 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 48,838 | 1,025 | 1,245,000 | -94,000 | $25.49 |
| 12/31/2018 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 47,813 | 0 | 1,339,000 | -287,000 | $28.00 |
| 09/30/2018 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 47,813 | -600 | 1,626,000 | -68,000 | $34.01 |
| 06/30/2018 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 48,413 | -2,867 | 1,694,000 | 591,000 | $34.99 |
| 03/31/2018 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 51,280 | -133 | 1,103,000 | -28,000 | $21.51 |
| 12/31/2017 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 51,413 | -3,024 | 1,131,000 | 287,000 | $22.00 |
| 09/30/2017 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 54,437 | -603 | 844,000 | 18,000 | $15.50 |
| 06/30/2017 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 55,040 | -800 | 826,000 | -67,000 | $15.01 |
| 03/31/2017 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 55,840 | -200 | 893,000 | 193,000 | $15.99 |
| 12/31/2016 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 56,040 | -800 | 700,000 | 18,000 | $12.49 |
| 09/30/2016 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 56,840 | -3,400 | 682,000 | 65,000 | $12.00 |
| 06/30/2016 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 60,240 | 0 | 617,000 | -106,000 | $10.24 |
| 03/31/2016 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 60,240 | -10,732 | 723,000 | -430,000 | $12.00 |
| 12/31/2015 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 60,540 | -10,432 | 817,000 | -336,000 | $13.50 |
| 09/30/2015 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 60,940 | -10,032 | 914,000 | -239,000 | $15.00 |
| 06/30/2015 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 61,640 | -2,800 | 986,000 | -174,000 | $16.00 |
| 03/31/2015 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 64,440 | -6,532 | 1,160,000 | 7,000 | $18.00 |
| 12/31/2014 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 65,722 | -5,250 | 1,347,000 | 194,000 | $20.50 |
| 09/30/2014 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 66,722 | -4,250 | 1,334,000 | 181,000 | $19.99 |
| 06/30/2014 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 67,072 | -3,900 | 1,358,000 | 205,000 | $20.25 |
| 03/31/2014 | NORTHERN TECHNOLOGIES INTERNATIONAL CORP | NTIC | 68,072 | -2,900 | 1,361,000 | 208,000 | $19.99 |
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