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ESSEX INVESTMENT MANAGEMENT CO LLC
> ATEC
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 06/30/2023 | Alphatec Holdings, Inc. | ATEC | 291,316 | 34,863 | 5,237,862,000 | 1,237,195,000 | $17,980.00 |
| 03/31/2023 | Alphatec Holdings, Inc. | ATEC | 256,453 | 37,015 | 4,000,667,000 | 3,997,957,000 | $15,600.00 |
| 12/31/2022 | Alphatec Holdings, Inc. | ATEC | 219,438 | -1,565 | 2,710,000 | 778,000 | $12.35 |
| 09/30/2022 | Alphatec Holdings, Inc. | ATEC | 221,003 | 6,196 | 1,932,000 | 527,000 | $8.74 |
| 06/30/2022 | Alphatec Holdings, Inc. | ATEC | 214,807 | 7,274 | 1,405,000 | -982,000 | $6.54 |
| 03/31/2022 | Alphatec Holdings, Inc. | ATEC | 207,533 | 9,613 | 2,387,000 | 125,000 | $11.50 |
| 12/31/2021 | Alphatec Holdings, Inc. | ATEC | 197,920 | 15,108 | 2,262,000 | 34,000 | $11.43 |
| 09/30/2021 | Alphatec Holdings, Inc. | ATEC | 182,812 | -40,674 | 2,228,000 | -1,196,000 | $12.19 |
| 06/30/2021 | Alphatec Holdings, Inc. | ATEC | 223,486 | -45,664 | 3,424,000 | -484,000 | $15.32 |
| 12/31/2020 | Alphatec Holdings, Inc. | ATEC | 269,150 | -48,947 | 3,908,000 | 1,796,000 | $14.52 |
| 09/30/2020 | Alphatec Holdings, Inc. | ATEC | 318,097 | 10,437 | 2,112,000 | 666,000 | $6.64 |
| 06/30/2020 | Alphatec Holdings, Inc. | ATEC | 307,660 | -1,509 | 1,446,000 | 379,000 | $4.70 |
| 03/31/2020 | Alphatec Holdings, Inc. | ATEC | 309,169 | -16,564 | 1,067,000 | -1,244,000 | $3.45 |
| 12/31/2019 | Alphatec Holdings, Inc. | ATEC | 325,733 | 15,311 | 2,311,000 | 753,000 | $7.09 |
| 09/30/2019 | Alphatec Holdings, Inc. | ATEC | 310,422 | 86,833 | 1,558,000 | 543,000 | $5.02 |
| 06/30/2019 | Alphatec Holdings, Inc. | ATEC | 223,589 | 223,589 | 1,015,000 | 1,015,000 | $4.54 |
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