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CITADEL ADVISORS LLC
> ALTR
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 06/30/2023 | Altair Engineering Inc. | ALTR | 166,402 | -11,558 | 12,619,927,000 | 4,528,086,000 | $75,840.00 |
| 12/31/2022 | Altair Engineering Inc. | ALTR | 177,960 | 89,657 | 8,091,841,000 | 8,087,936,000 | $45,470.00 |
| 09/30/2022 | Altair Engineering Inc. | ALTR | 88,303 | 88,303 | 3,905,000 | 3,905,000 | $44.22 |
| 06/30/2022 | Altair Engineering Inc. | ALTR | 0 | -57,078 | 0 | -3,676,000 | |
| 03/31/2022 | Altair Engineering Inc. | ALTR | 57,078 | 25,840 | 3,676,000 | 1,261,000 | $64.40 |
| 12/31/2021 | Altair Engineering Inc. | ALTR | 31,238 | -283 | 2,415,000 | 242,000 | $77.31 |
| 09/30/2021 | Altair Engineering Inc. | ALTR | 31,521 | 10,854 | 2,173,000 | 748,000 | $68.94 |
| 06/30/2021 | Altair Engineering Inc. | ALTR | 20,667 | 3,453 | 1,425,000 | 348,000 | $68.95 |
| 03/31/2021 | Altair Engineering Inc. | ALTR | 17,214 | -12,418 | 1,077,000 | -647,000 | $62.57 |
| 12/31/2020 | Altair Engineering Inc. | ALTR | 29,632 | 4,933 | 1,724,000 | 687,000 | $58.18 |
| 09/30/2020 | Altair Engineering Inc. | ALTR | 24,699 | -11,766 | 1,037,000 | -413,000 | $41.99 |
| 06/30/2020 | Altair Engineering Inc. | ALTR | 36,465 | -2,889 | 1,450,000 | 407,000 | $39.76 |
| 03/31/2020 | Altair Engineering Inc. | ALTR | 39,354 | 20,131 | 1,043,000 | 353,000 | $26.50 |
| 12/31/2019 | Altair Engineering Inc. | ALTR | 19,223 | 1,785 | 690,000 | 87,000 | $35.89 |
| 09/30/2019 | Altair Engineering Inc. | ALTR | 17,438 | -15,400 | 603,000 | -723,000 | $34.58 |
| 06/30/2019 | Altair Engineering Inc. | ALTR | 32,838 | 8,795 | 1,326,000 | 441,000 | $40.38 |
| 03/31/2019 | Altair Engineering Inc. | ALTR | 24,043 | -13,867 | 885,000 | -160,000 | $36.81 |
| 12/31/2018 | Altair Engineering Inc. | ALTR | 37,910 | 20,973 | 1,045,000 | 309,000 | $27.57 |
| 09/30/2018 | Altair Engineering Inc. | ALTR | 16,937 | -665,307 | 736,000 | -22,583,000 | $43.46 |
| 06/30/2018 | Altair Engineering Inc. | ALTR | 682,244 | 404,855 | 23,319,000 | 14,621,000 | $34.18 |
| 03/31/2018 | Altair Engineering Inc. | ALTR | 277,389 | -97,700 | 8,698,000 | -274,000 | $31.36 |
| 12/31/2017 | Altair Engineering Inc. | ALTR | 375,089 | 375,089 | 8,972,000 | 8,972,000 | $23.92 |
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