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| 16 Jan 2024 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 10,000 | $83.73 | $837,300 16 Jan 2024 | 0 | ↗ |
| 18 Dec 2023 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 10,000 | $74.12 | $741,200 18 Dec 2023 | 0 | ↗ |
| 16 Nov 2023 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 10,000 | $72.52 | $725,200 16 Nov 2023 | 0 | ↗ |
| 16 Oct 2023 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 10,000 | $65.23 | $652,300 16 Oct 2023 | 0 | ↗ |
| 18 Sep 2023 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 10,000 | $65.29 | $652,900 18 Sep 2023 | 0 | ↗ |
| 16 Aug 2023 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 10,000 | $62.47 | $624,700 16 Aug 2023 | 0 | ↗ |
| 17 Jul 2023 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 10,000 | $74.91 | $749,100 17 Jul 2023 | 0 | ↗ |
| 16 Jun 2023 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 10,000 | $75.18 | $751,800 16 Jun 2023 | 0 | ↗ |
| 6 Jun 2023 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 9,267 | $74.30 | $688,538 6 Jun 2023 | 103,591 | ↗ |
| 16 May 2023 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 10,000 | $67.94 | $679,400 16 May 2023 | 0 | ↗ |
| 12 May 2023 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 548 | $67.40 | $36,935 12 May 2023 | 112,858 | ↗ |
| 10 May 2023 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 5,358 | $67.82 | $363,380 10 May 2023 | 113,406 | ↗ |
| 17 Apr 2023 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 10,000 | $70.33 | $703,300 17 Apr 2023 | 0 | ↗ |
| 16 Mar 2023 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 1,893 | $64.97 | $122,988 16 Mar 2023 | 1,295 | ↗ |
| 15 Mar 2023 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 35,000 | $66.16 | $2,315,600 15 Mar 2023 | 0 | ↗ |
| 13 Mar 2023 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 1,505 | $62.49 | $94,047 13 Mar 2023 | 1,404 | ↗ |
| 15 Feb 2023 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 35,000 | $57.70 | $2,019,500 15 Feb 2023 | 0 | ↗ |
| 17 Jan 2023 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 35,000 | $49.91 | $1,746,850 17 Jan 2023 | 0 | ↗ |
| 9 Jan 2023 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 35,000 | $48.45 | $1,695,750 9 Jan 2023 | 0 | ↗ |
| 15 Nov 2022 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 77,177 | $49.86 | $3,848,045 15 Nov 2022 | 83,962 | ↗ |
| 12 May 2022 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 2,520 | $49.31 | $124,261 12 May 2022 | 161,139 | ↗ |
| 14 Mar 2022 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 1,406 | $59.96 | $84,304 14 Mar 2022 | 118,724 | ↗ |
| 7 Mar 2022 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 1,791 | $64.55 | $115,609 7 Mar 2022 | 120,130 | ↗ |
| 15 Dec 2021 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 42,809 | $71.34 | $3,053,994 15 Dec 2021 | 0 | ↗ |
| 17 Nov 2021 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 18,727 | $78.27 | $1,465,762 17 Nov 2021 | 0 | ↗ |
| 15 Nov 2021 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 29,672 | $78.45 | $2,327,768 15 Nov 2021 | 0 | ↗ |
| 19 Oct 2021 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 21,031 | $74.13 | $1,559,028 19 Oct 2021 | 0 | ↗ |
| 15 Oct 2021 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 48,969 | $73.56 | $3,602,160 15 Oct 2021 | 0 | ↗ |
| 17 Sep 2021 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 36,722 | $74.67 | $2,742,032 17 Sep 2021 | 0 | ↗ |
| 15 Sep 2021 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 33,278 | $75.25 | $2,504,170 15 Sep 2021 | 0 | ↗ |
| 18 Aug 2021 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 23,628 | $70.93 | $1,675,934 18 Aug 2021 | 0 | ↗ |
| 16 Aug 2021 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 46,372 | $71.84 | $3,331,364 16 Aug 2021 | 0 | ↗ |
| 19 Jul 2021 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 15,922 | $64.97 | $1,034,452 19 Jul 2021 | 0 | ↗ |
| 15 Jul 2021 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 54,078 | $65.60 | $3,547,517 15 Jul 2021 | 0 | ↗ |
| 17 Jun 2021 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 19,933 | $62.99 | $1,255,580 17 Jun 2021 | 0 | ↗ |
| 15 Jun 2021 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 50,067 | $64.04 | $3,206,291 15 Jun 2021 | 0 | ↗ |
| 19 May 2021 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 19,110 | $61.16 | $1,168,768 19 May 2021 | 0 | ↗ |
| 17 May 2021 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 50,890 | $64.69 | $3,292,074 17 May 2021 | 0 | ↗ |
| 12 May 2021 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 2,230 | $64.34 | $143,478 12 May 2021 | 119,290 | ↗ |
| 15 Apr 2021 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 70,000 | $63.17 | $4,421,900 15 Apr 2021 | 0 | ↗ |
| 17 Mar 2021 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 11,008 | $60.25 | $663,232 17 Mar 2021 | 0 | ↗ |
| 15 Mar 2021 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 58,992 | $61.11 | $3,605,001 15 Mar 2021 | 0 | ↗ |
| 12 Mar 2021 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 1,845 | $59.51 | $109,796 12 Mar 2021 | 101,520 | ↗ |
| 5 Mar 2021 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 2,186 | $59.24 | $129,499 5 Mar 2021 | 103,365 | ↗ |
| 18 Feb 2021 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 3,755 | $61.11 | $229,468 18 Feb 2021 | 0 | ↗ |
| 16 Feb 2021 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 66,245 | $64.42 | $4,267,503 16 Feb 2021 | 0 | ↗ |
| 20 Jan 2021 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 14,635 | $61.89 | $905,760 20 Jan 2021 | 0 | ↗ |
| 15 Jan 2021 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 55,365 | $60.50 | $3,349,583 15 Jan 2021 | 0 | ↗ |
| 17 Dec 2020 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 5,976 | $57.83 | $345,592 17 Dec 2020 | 0 | ↗ |
| 15 Dec 2020 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 54,024 | $56.92 | $3,075,046 15 Dec 2020 | 0 | ↗ |
| 10 Dec 2020 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Option | 57,915 | $5.18 | $300,000 10 Dec 2020 | 105,551 | ↗ |
| 16 Nov 2020 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 60,000 | $49.17 | $2,950,200 16 Nov 2020 | 0 | ↗ |
| 19 Oct 2020 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 13,510 | $46.29 | $625,378 19 Oct 2020 | 0 | ↗ |
| 15 Oct 2020 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 46,490 | $45.96 | $2,136,680 15 Oct 2020 | 0 | ↗ |
| 15 Sep 2020 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 97,075 | $40.13 | $3,895,620 15 Sep 2020 | 0 | ↗ |
| 17 Aug 2020 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 60,000 | $40.84 | $2,450,400 17 Aug 2020 | 0 | ↗ |
| 17 Jul 2020 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 7,664 | $37.82 | $289,852 17 Jul 2020 | 0 | ↗ |
| 15 Jul 2020 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 52,336 | $37.64 | $1,969,927 15 Jul 2020 | 0 | ↗ |
| 9 Apr 2020 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 2,055 | $27.32 | $56,143 9 Apr 2020 | 47,636 | ↗ |
| 9 Mar 2020 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 2,369 | $28.83 | $68,298 9 Mar 2020 | 36,322 | ↗ |
| 9 Mar 2020 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 2,369 | $28.83 | $68,298 9 Mar 2020 | 33,691 | ↗ |
| 3 Oct 2019 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 30,534 | $32.49 | $992,050 3 Oct 2019 | 0 | ↗ |
| 2 Oct 2019 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 34,310 | $32.87 | $1,127,770 2 Oct 2019 | 0 | ↗ |
| 1 Oct 2019 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 25,156 | $34.00 | $855,304 1 Oct 2019 | 0 | ↗ |
| 3 Sep 2019 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 90,000 | $33.54 | $3,018,600 3 Sep 2019 | 0 | ↗ |
| 1 Aug 2019 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 90,000 | $40.65 | $3,658,500 1 Aug 2019 | 0 | ↗ |
| 2 Jul 2019 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 27,007 | $40.42 | $1,091,623 2 Jul 2019 | 0 | ↗ |
| 1 Jul 2019 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 62,993 | $40.93 | $2,578,303 1 Jul 2019 | 0 | ↗ |
| 4 Jun 2019 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 6,300 | $37.61 | $236,943 4 Jun 2019 | 0 | ↗ |
| 3 Jun 2019 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 83,700 | $36.86 | $3,085,182 3 Jun 2019 | 0 | ↗ |
| 3 May 2019 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 78,150 | $37.04 | $2,894,676 3 May 2019 | 0 | ↗ |
| 2 May 2019 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 16,744 | $36.89 | $617,686 2 May 2019 | 0 | ↗ |
| 1 May 2019 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 20,112 | $38.30 | $770,290 1 May 2019 | 0 | ↗ |
| 10 Apr 2019 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 28,727 | $36.90 | $1,060,026 10 Apr 2019 | 0 | ↗ |
| 9 Apr 2019 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 19,453 | $36.79 | $715,676 9 Apr 2019 | 0 | ↗ |
| 8 Apr 2019 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 16,814 | $37.14 | $624,472 8 Apr 2019 | 0 | ↗ |
| 15 Mar 2019 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Option | 19,305 | $39.02 | $753,281 15 Mar 2019 | 138,029 | ↗ |
| 6 Mar 2019 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 1,309 | $35.64 | $46,653 6 Mar 2019 | 18,691 | ↗ |
| 11 Jun 2018 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Sale | 1,075,420 | $33.43 | $35,951,291 11 Jun 2018 | 0 | ↗ |
| 3 Nov 2017 | ALTRAltair Engineering Inc | James Ralph Scapa Chief Executive Officer | Option | 1,734,996 | $0.64 | $1,110,397 3 Nov 2017 | 1,734,996 | ↗ |