| Stock | Role | Class | Num Shares | Value | Price $ | Report Date | Ownership |
|---|---|---|---|---|---|---|---|
| Altair Engineering Inc. | 10%+ Owner | Class A Common Stock | 0 | $0 | $109.13 | 23 Oct 2024 | Direct |
| Altair Engineering Inc. | 10%+ Owner | Class B Common Stock | 0 | $0 | $113.00 | 26 Mar 2025 | Direct |
| Symbol | Company | Period | Transactions | Value $ | Form Type | Role | Filing Time |
|---|---|---|---|---|---|---|---|
| ALTR | Altair Engineering Inc. | 26 Mar 2025 | 1 | -$506M | 4 | 10%+ Owner | 26 Mar 2025, 16:36 |
| ALTR | Altair Engineering Inc. | 23 Oct 2024 | 7 | -$10.7M | 4 | 10%+ Owner | 25 Oct 2024, 14:03 |
| ALTR | Altair Engineering Inc. | 09 Oct 2024 | 2 | -$4.78M | 4 | 10%+ Owner | 10 Oct 2024, 08:02 |
| ALTR | Altair Engineering Inc. | 27 Sep 2024 | 1 | -$4.76M | 4 | 10%+ Owner | 30 Sep 2024, 14:48 |
| ALTR | Altair Engineering Inc. | 27 Jun 2024 | 2 | -$9.84M | 4 | 10%+ Owner | 28 Jun 2024, 08:03 |
| ALTR | Altair Engineering Inc. | 17 Jun 2024 | 2 | $0 | 4 | 10%+ Owner | 18 Jun 2024, 16:27 |
| ALTR | Altair Engineering Inc. | 11 Jun 2024 | 2 | -$9.25M | 4 | 10%+ Owner | 13 Jun 2024, 11:46 |
| ALTR | Altair Engineering Inc. | 08 May 2024 | 2 | -$7.42M | 4 | 10%+ Owner | 09 May 2024, 19:49 |
| ALTR | Altair Engineering Inc. | 09 Apr 2024 | 2 | -$1.1M | 4 | 10%+ Owner | 11 Apr 2024, 16:38 |
| ALTR | Altair Engineering Inc. | 28 Mar 2024 | 1 | -$7.17M | 4 | 10%+ Owner | 01 Apr 2024, 10:41 |
| ALTR | Altair Engineering Inc. | 26 Mar 2024 | 1 | -$333K | 4 | 10%+ Owner | 28 Mar 2024, 14:49 |
| ALTR | Altair Engineering Inc. | 22 Mar 2024 | 2 | -$1.11M | 4 | 10%+ Owner | 26 Mar 2024, 13:17 |
| ALTR | Altair Engineering Inc. | 23 Feb 2024 | 2 | $0 | 4 | 10%+ Owner | 25 Mar 2024, 14:50 |
| ALTR | Altair Engineering Inc. | 23 Jan 2024 | 4 | -$8.73M | 4 | 10%+ Owner | 25 Jan 2024, 15:46 |
| ALTR | Altair Engineering Inc. | 20 Nov 2023 | 4 | -$7.4M | 4 | 10%+ Owner | 22 Nov 2023, 12:04 |
| ALTR | Altair Engineering Inc. | 19 Jul 2023 | 4 | -$7.44M | 4 | 10%+ Owner | 20 Jul 2023, 10:23 |
| ALTR | Altair Engineering Inc. | 06 Jun 2023 | 4 | -$7.44M | 4 | 10%+ Owner | 07 Jun 2023, 12:33 |
| ALTR | Altair Engineering Inc. | 11 Apr 2023 | 3 | -$3.53M | 4 | 10%+ Owner | 12 Apr 2023, 15:51 |
| ALTR | Altair Engineering Inc. | 06 Apr 2023 | 3 | -$3.52M | 4 | 10%+ Owner | 10 Apr 2023, 14:01 |
| ALTR | Altair Engineering Inc. | 23 Dec 2021 | 4 | -$4.17M | 4 | 10%+ Owner | 27 Dec 2021, 07:20 |
| ALTR | Altair Engineering Inc. | 16 Dec 2021 | 3 | -$58.3K | 4 | 10%+ Owner | 17 Dec 2021, 09:01 |
| ALTR | Altair Engineering Inc. | 13 Dec 2021 | 3 | -$3.15M | 4 | 10%+ Owner | 15 Dec 2021, 14:36 |
| ALTR | Altair Engineering Inc. | 03 Nov 2021 | 7 | -$7.8M | 4 | 10%+ Owner | 05 Nov 2021, 10:38 |
| ALTR | Altair Engineering Inc. | 14 Oct 2021 | 4 | -$4.89M | 4 | 10%+ Owner | 15 Oct 2021, 13:49 |
| ALTR | Altair Engineering Inc. | 07 Oct 2021 | 3 | -$2.39M | 4 | 10%+ Owner | 12 Oct 2021, 08:34 |
| ALTR | Altair Engineering Inc. | 24 Sep 2021 | 4 | $0 | 4 | 10%+ Owner | 27 Sep 2021, 14:03 |
| ALTR | Altair Engineering Inc. | 01 Sep 2021 | 6 | -$7.51M | 4 | 10%+ Owner | 03 Sep 2021, 08:48 |
| ALTR | Altair Engineering Inc. | 12 Aug 2021 | 3 | -$3.94M | 4 | 10%+ Owner | 13 Aug 2021, 13:00 |
| ALTR | Altair Engineering Inc. | 11 Aug 2021 | 3 | -$3.15M | 4 | 10%+ Owner | 12 Aug 2021, 09:54 |
| ALTR | Altair Engineering Inc. | 23 Jul 2021 | 3 | -$2.41M | 4 | 10%+ Owner | 26 Jul 2021, 10:30 |
| ALTR | Altair Engineering Inc. | 06 Jul 2021 | 4 | -$4.58M | 4 | 10%+ Owner | 08 Jul 2021, 09:58 |
| ALTR | Altair Engineering Inc. | 08 Jun 2021 | 3 | -$2.35M | 4 | 10%+ Owner | 09 Jun 2021, 09:29 |
| ALTR | Altair Engineering Inc. | 04 Jun 2021 | 4 | -$4.24M | 4 | 10%+ Owner | 08 Jun 2021, 13:23 |
| ALTR | Altair Engineering Inc. | 07 May 2021 | 5 | -$6.55M | 4 | 10%+ Owner | 10 May 2021, 09:26 |