Real time insider trading transaction history:
- Insiders are prohibited from making short-swing profits by trading their shares within 6 months of the registration or acquiring the shares.
- Shares are not adjusted for stock split.
"Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise"
- Peter Lynch
What is insider trading>>
- Peter Lynch
What is insider trading>>

Common stock purchase or sale:
Transaction Date | Reported DateTime | Company | Symbol | Insider Relationship | Shares Traded | Average Price | Total Amount | Shares Owned | Filing |
2025-03-03 Sale | 2025-03-05 12:02 pm | Altair Engineering Inc. | ALTR | Brown Matthew Charles Chief Financial Officer | 742 | $111.45 | $82,696 | 68,652 (Direct) | View |
2025-02-26 Sale | 2025-02-27 1:53 pm | Altair Engineering Inc. | ALTR | Brown Matthew Charles Chief Financial Officer | 3,811 | $111.53 | $425,041 | 69,394 (Direct) | View |
2024-12-23 Sale | 2024-12-26 09:43 am | Altair Engineering Inc. | ALTR | Brown Matthew Charles Chief Financial Officer | 1,048 | $108.9 | $114,127 | 55,519 (Direct) | View |
2024-03-04 Sale | 2024-03-05 2:41 pm | Altair Engineering Inc. | ALTR | Brown Matthew Charles Chief Financial Officer | 883 | $85.32 | $75,338 | 47,859 (Direct) | View |
2024-02-28 Sale | 2024-02-29 3:34 pm | Altair Engineering Inc. | ALTR | Brown Matthew Charles Chief Financial Officer | 4,363 | $83.65 | $364,969 | 48,742 (Direct) | View |
2023-03-01 Sale | 2023-03-03 12:54 pm | Altair Engineering Inc. | ALTR | Brown Matthew Charles Chief Financial Officer | 3,477 | $63.84 | $221,972 | 63,496 (Direct) | View |
2022-03-07 Sale | 2022-03-09 8:52 pm | Altair Engineering Inc. | ALTR | Brown Matthew Charles Chief Financial Officer | 2,298 | $64.55 | $148,336 | 22,811 (Direct) | View |
2020-08-17 Sale | 2020-08-18 4:32 pm | NortonLifeLock Inc. | NLOK | Brown Matthew Charles CAO | 531 | $22.94 | $12,181 | 129,675 (Direct) | View |
2020-08-11 Sale | 2020-08-12 4:31 pm | NortonLifeLock Inc. | NLOK | Brown Matthew Charles CAO | 31,598 | $22.63 | $714,968 | 98,077 (Direct) | View |
Stock options: Exercise, Award, Grant, Conversion
Transaction Date | Reported DateTime | Exercisable Expiration | Company | Symnbol | Insider Relationship | Shares Traded | Conversion Price | Shares Owned | Filing |
2025-03-26 Disposition | 2025-03-26 4:42 pm | N/A 2032-12-15 | Altair Engineering Inc. | ALTR | Brown Matthew Charles Chief Financial Officer | 12,000 | $51.21 | 0 (Direct) | View |
2025-03-26 Disposition | 2025-03-26 4:42 pm | N/A 2032-12-15 | Altair Engineering Inc. | ALTR | Brown Matthew Charles Chief Financial Officer | 24,000 | $67.09 | 0 (Direct) | View |
2025-03-26 Disposition | 2025-03-26 4:42 pm | N/A 2033-03-02 | Altair Engineering Inc. | ALTR | Brown Matthew Charles Chief Financial Officer | 20,625 | $47.81 | 0 (Direct) | View |
2025-03-26 Disposition | 2025-03-26 4:42 pm | N/A N/A | Altair Engineering Inc. | ALTR | Brown Matthew Charles Chief Financial Officer | 66,125 | $113 | 0 (Direct) | View |
2025-03-26 Disposition | 2025-03-26 4:42 pm | N/A 2031-01-04 | Altair Engineering Inc. | ALTR | Brown Matthew Charles Chief Financial Officer | 45,000 | $55.3 | 0 (Direct) | View |
2025-03-26 Disposition | 2025-03-26 4:42 pm | N/A 2034-03-15 | Altair Engineering Inc. | ALTR | Brown Matthew Charles Chief Financial Officer | 21,563 | $33.97 | 0 (Direct) | View |
2025-03-26 Disposition | 2025-03-26 4:42 pm | N/A 2032-03-19 | Altair Engineering Inc. | ALTR | Brown Matthew Charles Chief Financial Officer | 8,000 | $50.09 | 0 (Direct) | View |
2025-03-06 Gift | 2025-03-06 5:47 pm | N/A N/A | Altair Engineering Inc. | ALTR | Brown Matthew Charles Chief Financial Officer | 2,527 | $0 | 66,125 (Direct) | View |
2025-02-12 Option Award | 2025-02-14 10:41 am | N/A N/A | Altair Engineering Inc. | ALTR | Brown Matthew Charles Chief Financial Officer | 17,613 | $0 | 73,205 (Direct) | View |
2025-01-14 Option Award | 2025-01-16 09:24 am | N/A N/A | Altair Engineering Inc. | ALTR | Brown Matthew Charles Chief Financial Officer | 73 | $82.42 | 55,592 (Direct) | View |
2024-07-12 Option Award | 2024-07-16 12:30 pm | N/A N/A | Altair Engineering Inc. | ALTR | Brown Matthew Charles Chief Financial Officer | 83 | $71.68 | 56,567 (Direct) | View |
2024-03-15 Option Award | 2024-03-19 11:47 am | N/A 2034-03-15 | Altair Engineering Inc. | ALTR | Brown Matthew Charles Chief Financial Officer | 30,188 | $0 | 78,047 (Direct) | View |
2024-01-12 Option Award | 2024-01-17 5:24 pm | N/A N/A | Altair Engineering Inc. | ALTR | Brown Matthew Charles Chief Financial Officer | 94 | $63.92 | 53,105 (Direct) | View |
2023-12-20 Option Award | 2023-12-21 10:46 am | N/A N/A | Altair Engineering Inc. | ALTR | Brown Matthew Charles Chief Financial Officer | 10,000 | $0 | 53,011 (Direct) | View |
2023-07-14 Option Award | 2023-07-17 2:25 pm | N/A N/A | Altair Engineering Inc. | ALTR | Brown Matthew Charles Chief Financial Officer | 140 | $42.65 | 43,011 (Direct) | View |
2023-03-02 Option Award | 2023-03-03 12:54 pm | N/A 2033-03-02 | Altair Engineering Inc. | ALTR | Brown Matthew Charles Chief Financial Officer | 28,875 | $0 | 63,496 (Direct) | View |
2023-01-14 Option Award | 2023-01-18 12:21 pm | N/A N/A | Altair Engineering Inc. | ALTR | Brown Matthew Charles Chief Financial Officer | 142 | $42.31 | 38,098 (Direct) | View |
2022-12-15 Option Award | 2022-12-16 1:39 pm | N/A 2032-12-15 | Altair Engineering Inc. | ALTR | Brown Matthew Charles Chief Financial Officer | 24,000 | $0 | 24,000 (Direct) | View |
2022-07-14 Option Award | 2022-07-18 10:16 am | N/A N/A | Altair Engineering Inc. | ALTR | Brown Matthew Charles Chief Financial Officer | 145 | $41.68 | 37,956 (Direct) | View |
2022-03-19 Option Award | 2022-03-22 7:13 pm | N/A 2032-02-15 | Altair Engineering Inc. | ALTR | Brown Matthew Charles Chief Financial Officer | 19,000 | $0 | 45,811 (Direct) | View |
2022-02-15 Option Award | 2022-03-16 4:49 pm | N/A 2032-02-15 | Altair Engineering Inc. | ALTR | Brown Matthew Charles Chief Financial Officer | 16,000 | $0 | 38,811 (Direct) | View |
2022-01-14 Option Award | 2022-01-19 2:48 pm | N/A N/A | Altair Engineering Inc. | ALTR | Brown Matthew Charles Chief Financial Officer | 109 | $54.57 | 25,109 (Direct) | View |
Ownership | 2021-03-18 11:29 am | N/A N/A | Altair Engineering Inc. | ALTR | Brown Matthew Charles Chief Financial Officer | 0 | $0 | 70,000 (Direct) | View |
2020-07-10 Option Award | 2020-07-14 4:30 pm | N/A N/A | NortonLifeLock Inc. | NLOK | Brown Matthew Charles CAO | 36,789 | $0 | 129,675 (Direct) | View |