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Matrix Capital Management Company, LP
> ALTR
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 06/30/2023 | Altair Engineering Inc. | ALTR | 11,174,200 | 869,200 | 847,451,328,000 | 846,995,641,000 | $75,840.00 |
| 09/30/2022 | Altair Engineering Inc. | ALTR | 10,305,000 | 1,005,000 | 455,687,000 | -32,563,000 | $44.22 |
| 06/30/2022 | Altair Engineering Inc. | ALTR | 9,300,000 | 700,000 | 488,250,000 | -65,590,000 | $52.50 |
| 03/31/2022 | Altair Engineering Inc. | ALTR | 8,600,000 | 0 | 553,840,000 | -111,112,000 | $64.40 |
| 12/31/2021 | Altair Engineering Inc. | ALTR | 8,600,000 | 3,354,975 | 664,952,000 | 303,203,000 | $77.32 |
| 06/30/2021 | Altair Engineering Inc. | ALTR | 5,245,025 | 90,000 | 361,749,000 | 61,830,000 | $68.97 |
| 12/31/2020 | Altair Engineering Inc. | ALTR | 5,155,025 | 1,018,300 | 299,919,000 | 126,259,000 | $58.18 |
| 09/30/2020 | Altair Engineering Inc. | ALTR | 4,136,725 | 0 | 173,660,000 | 9,225,000 | $41.98 |
| 06/30/2020 | Altair Engineering Inc. | ALTR | 4,136,725 | 0 | 164,435,000 | 54,812,000 | $39.75 |
| 03/31/2020 | Altair Engineering Inc. | ALTR | 4,136,725 | 1,744,000 | 109,623,000 | 23,700,000 | $26.50 |
| 12/31/2019 | Altair Engineering Inc. | ALTR | 2,392,725 | 1,688,100 | 85,923,000 | 61,529,000 | $35.91 |
| 09/30/2019 | Altair Engineering Inc. | ALTR | 704,625 | 704,625 | 24,394,000 | 24,394,000 | $34.62 |
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