| Company | Role | Class | Num Shares | Value | Price $ | Report Date | Ownership |
|---|---|---|---|---|---|---|---|
| Altair Engineering Inc. | 10%+ Owner | Class A Common Stock | 0 | $0 | $113.00 | 26 Mar 2025 | By GC Investments |
| Altair Engineering Inc. | 10%+ Owner | Class A Common Stock | 0 | $0 | $113.00 | 26 Mar 2025 | By The Dana Christ Irrevocable Trust Dated May 8, 2015 |
| Altair Engineering Inc. | 10%+ Owner | Class A Common Stock | 0 | $0 | $113.00 | 26 Mar 2025 | By The Lauren Christ Irrevocable Trust Dated May 8, 2015 |
| Altair Engineering Inc. | 10%+ Owner | Class B Common Stock | 0 | $0 | $113.00 | 26 Mar 2025 | By Christ Revocable Trust |
| Altair Engineering Inc. | 10%+ Owner | Class B Common Stock | 0 | $0 | $113.00 | 26 Mar 2025 | By GC Investments |
| Symbol | Company | Period | Transactions | Value $ | Form Type | Role | Filing Time |
|---|---|---|---|---|---|---|---|
| ALTR | Altair Engineering Inc. | 26 Mar 2025 | 5 | -$1,039,682,716 | 4 | 10%+ Owner | 26 Mar 2025, 16:29 |
| ALTR | Altair Engineering Inc. | 23 Oct 2024 | 7 | -$10,657,488 | 4 | 10%+ Owner | 25 Oct 2024, 14:02 |
| ALTR | Altair Engineering Inc. | 11 Oct 2024 | 3 | -$9,523,390 | 4 | 10%+ Owner | 15 Oct 2024, 09:42 |
| ALTR | Altair Engineering Inc. | 09 Oct 2024 | 2 | -$4,781,646 | 4 | 10%+ Owner | 10 Oct 2024, 08:05 |
| ALTR | Altair Engineering Inc. | 27 Sep 2024 | 1 | -$4,758,224 | 4 | 10%+ Owner | 30 Sep 2024, 14:47 |
| ALTR | Altair Engineering Inc. | 27 Jun 2024 | 2 | -$9,839,631 | 4 | 10%+ Owner | 28 Jun 2024, 08:05 |
| ALTR | Altair Engineering Inc. | 17 Jun 2024 | 4 | $0 | 4 | 10%+ Owner | 18 Jun 2024, 16:28 |
| ALTR | Altair Engineering Inc. | 11 Jun 2024 | 4 | -$18,971,823 | 4 | 10%+ Owner | 13 Jun 2024, 11:48 |
| ALTR | Altair Engineering Inc. | 20 May 2024 | 3 | -$4,584,767 | 4 | 10%+ Owner | 22 May 2024, 13:23 |
| ALTR | Altair Engineering Inc. | 17 May 2024 | 2 | -$4,517,986 | 4 | 10%+ Owner | 20 May 2024, 10:19 |
| ALTR | Altair Engineering Inc. | 08 May 2024 | 2 | -$7,423,856 | 4 | 10%+ Owner | 09 May 2024, 19:51 |
| ALTR | Altair Engineering Inc. | 09 Apr 2024 | 2 | -$1,097,379 | 4 | 10%+ Owner | 11 Apr 2024, 16:44 |
| ALTR | Altair Engineering Inc. | 28 Mar 2024 | 1 | -$7,165,779 | 4 | 10%+ Owner | 01 Apr 2024, 10:47 |
| ALTR | Altair Engineering Inc. | 26 Mar 2024 | 1 | -$333,490 | 4 | 10%+ Owner | 28 Mar 2024, 14:54 |
| ALTR | Altair Engineering Inc. | 22 Mar 2024 | 2 | -$1,106,378 | 4 | 10%+ Owner | 26 Mar 2024, 13:23 |
| ALTR | Altair Engineering Inc. | 23 Feb 2024 | 4 | $0 | 4 | 10%+ Owner | 25 Mar 2024, 14:57 |
| ALTR | Altair Engineering Inc. | 23 Jan 2024 | 4 | -$8,732,124 | 4 | 10%+ Owner | 25 Jan 2024, 15:48 |
| ALTR | Altair Engineering Inc. | 08 Dec 2023 | 3 | -$326,688 | 4 | 10%+ Owner | 11 Dec 2023, 09:16 |
| ALTR | Altair Engineering Inc. | 06 Dec 2023 | 4 | -$1,038,366 | 4 | 10%+ Owner | 08 Dec 2023, 12:00 |
| ALTR | Altair Engineering Inc. | 01 Dec 2023 | 3 | -$3,331,165 | 4 | 10%+ Owner | 05 Dec 2023, 15:04 |
| ALTR | Altair Engineering Inc. | 29 Nov 2023 | 7 | -$1,949,987 | 4 | 10%+ Owner | 01 Dec 2023, 14:22 |
| ALTR | Altair Engineering Inc. | 20 Nov 2023 | 8 | -$8,026,666 | 4 | 10%+ Owner | 22 Nov 2023, 12:07 |
| ALTR | Altair Engineering Inc. | 19 Jul 2023 | 4 | -$7,442,208 | 4 | 10%+ Owner | 20 Jul 2023, 10:24 |
| ALTR | Altair Engineering Inc. | 06 Jun 2023 | 4 | -$7,442,179 | 4 | 10%+ Owner | 07 Jun 2023, 12:38 |
| ALTR | Altair Engineering Inc. | 13 Apr 2023 | 7 | -$7,123,397 | 4 | 10%+ Owner | 17 Apr 2023, 08:41 |
| ALTR | Altair Engineering Inc. | 11 Apr 2023 | 3 | -$3,525,200 | 4 | 10%+ Owner | 12 Apr 2023, 15:53 |
| ALTR | Altair Engineering Inc. | 06 Apr 2023 | 3 | -$3,524,550 | 4 | 10%+ Owner | 10 Apr 2023, 14:02 |
| ALTR | Altair Engineering Inc. | 14 Mar 2023 | 4 | -$3,312,964 | 4 | 10%+ Owner | 16 Mar 2023, 09:07 |
| ALTR | Altair Engineering Inc. | 10 Mar 2023 | 3 | -$3,226,463 | 4 | 10%+ Owner | 14 Mar 2023, 14:11 |
| ALTR | Altair Engineering Inc. | 23 Dec 2021 | 4 | -$4,167,309 | 4 | 10%+ Owner | 27 Dec 2021, 07:22 |
| ALTR | Altair Engineering Inc. | 16 Dec 2021 | 3 | -$58,349 | 4 | 10%+ Owner | 17 Dec 2021, 09:02 |
| ALTR | Altair Engineering Inc. | 13 Dec 2021 | 3 | -$3,146,459 | 4 | 10%+ Owner | 15 Dec 2021, 14:40 |
| ALTR | Altair Engineering Inc. | 03 Nov 2021 | 7 | -$7,795,261 | 4 | 10%+ Owner | 05 Nov 2021, 10:39 |
| ALTR | Altair Engineering Inc. | 14 Oct 2021 | 4 | -$4,885,333 | 4 | 10%+ Owner | 15 Oct 2021, 13:51 |
| ALTR | Altair Engineering Inc. | 07 Oct 2021 | 3 | -$2,392,465 | 4 | 10%+ Owner | 12 Oct 2021, 08:36 |
| ALTR | Altair Engineering Inc. | 24 Sep 2021 | 4 | $0 | 4 | 10%+ Owner | 27 Sep 2021, 14:04 |
| ALTR | Altair Engineering Inc. | 01 Sep 2021 | 6 | -$7,505,600 | 4 | 10%+ Owner | 03 Sep 2021, 08:50 |
| ALTR | Altair Engineering Inc. | 12 Aug 2021 | 3 | -$3,942,613 | 4 | 10%+ Owner | 13 Aug 2021, 13:02 |
| ALTR | Altair Engineering Inc. | 11 Aug 2021 | 3 | -$3,149,633 | 4 | 10%+ Owner | 12 Aug 2021, 09:55 |
| ALTR | Altair Engineering Inc. | 23 Jul 2021 | 3 | -$2,411,620 | 4 | 10%+ Owner | 26 Jul 2021, 10:32 |
| ALTR | Altair Engineering Inc. | 06 Jul 2021 | 4 | -$4,576,825 | 4 | 10%+ Owner | 08 Jul 2021, 10:01 |
| ALTR | Altair Engineering Inc. | 08 Jun 2021 | 3 | -$2,346,944 | 4 | 10%+ Owner | 09 Jun 2021, 09:30 |
| ALTR | Altair Engineering Inc. | 04 Jun 2021 | 4 | -$4,238,204 | 4 | 10%+ Owner | 08 Jun 2021, 13:25 |
| ALTR | Altair Engineering Inc. | 07 May 2021 | 5 | -$6,546,547 | 4 | 10%+ Owner | 10 May 2021, 09:27 |