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Herald Investment Management Ltd
> TGEN
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 12/31/2022 | TECOGEN INC. | TGEN | 321,078 | 0 | 401,000 | 97,000 | $1.25 |
| 09/30/2022 | TECOGEN INC. | TGEN | 321,078 | 0 | 304,000 | -58,000 | $0.95 |
| 06/30/2022 | TECOGEN INC. | TGEN | 321,078 | 0 | 362,000 | -167,000 | $1.13 |
| 03/31/2022 | TECOGEN INC. | TGEN | 321,078 | 0 | 529,000 | 144,000 | $1.65 |
| 12/31/2021 | TECOGEN INC. | TGEN | 321,078 | 0 | 385,000 | -196,000 | $1.20 |
| 09/30/2021 | TECOGEN INC. | TGEN | 321,078 | 0 | 581,000 | -19,000 | $1.81 |
| 06/30/2021 | TECOGEN INC. | TGEN | 321,078 | 0 | 600,000 | 55,000 | $1.87 |
| 03/31/2021 | TECOGEN INC. | TGEN | 321,078 | 0 | 545,000 | 154,000 | $1.70 |
| 12/31/2020 | TECOGEN INC. | TGEN | 321,078 | 0 | 391,000 | 99,000 | $1.22 |
| 09/30/2020 | TECOGEN INC. | TGEN | 321,078 | 0 | 292,000 | 68,000 | $0.91 |
| 06/30/2020 | TECOGEN INC. | TGEN | 321,078 | 0 | 224,000 | -74,000 | $0.70 |
| 03/31/2020 | TECOGEN INC. | TGEN | 321,078 | 0 | 298,000 | -392,000 | $0.93 |
| 12/31/2019 | TECOGEN INC. | TGEN | 321,078 | 0 | 690,000 | -32,000 | $2.15 |
| 09/30/2019 | TECOGEN INC. | TGEN | 321,078 | 0 | 722,000 | -392,000 | $2.25 |
| 06/30/2019 | TECOGEN INC. | TGEN | 321,078 | 0 | 1,114,000 | -106,000 | $3.47 |
| 03/31/2019 | TECOGEN INC. | TGEN | 321,078 | 0 | 1,220,000 | 55,000 | $3.80 |
| 12/31/2018 | TECOGEN INC. | TGEN | 321,078 | 0 | 1,165,000 | 154,000 | $3.63 |
| 09/30/2018 | TECOGEN INC. | TGEN | 321,078 | 0 | 1,011,000 | -148,000 | $3.15 |
| 06/30/2018 | TECOGEN INC. | TGEN | 321,078 | 110,552 | 1,159,000 | 560,000 | $3.61 |
| 03/31/2018 | TECOGEN INC. | TGEN | 210,526 | 210,526 | 599,000 | 599,000 | $2.85 |
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