Altair Engineering Inc.
Total Trades
257
Buys
0
Sells
221
Largest Trade
N/A
Insiders
20
Institutional Funds
1
Inst. Value
$1K–$15K
Activist Filings
19
Insider Trades
| Insider | Title | Type | Value | Shares | Price | Date |
|---|---|---|---|---|---|---|
| Christ George J | 10% Owner | SELL | $1M+ | 100K | $98.40 | Jun 28, 2024 |
| Christ Revocable Trust | 10% Owner | SELL | $1M+ | 100K | $98.40 | Jun 28, 2024 |
| Maitra Raoul | Chief Legal Officer | SELL | $50K–$100K | 1K | $96.31 | Jun 18, 2024 |
| Gayle Brian | Chief Accounting O… | SELL | $100K–$500K | 2K | $96.57 | Jun 14, 2024 |
| Christ George J | 10% Owner | SELL | $1M+ | 200K | $94.86 | Jun 13, 2024 |
| Christ Revocable Trust | 10% Owner | SELL | $1M+ | 100K | $92.49 | Jun 13, 2024 |
| GC Investments LLC | 10% Owner | SELL | $1M+ | 100K | $97.23 | Jun 13, 2024 |
| James R. Scapa Declaration of Trust | 10% Owner | SELL | $500K+ | 7K | $93.16 | Jun 11, 2024 |
| Scapa James Ralph | CEO | SELL | $1M+ | 13K | $93.16 | Jun 11, 2024 |
| JRS Investments LLC | 10% Owner | SELL | $500K+ | 7K | $93.16 | Jun 11, 2024 |
| Srikanth Mahalingam | CTO | SELL | $100K–$500K | 2K | $89.01 | Jun 5, 2024 |
| Harris Teresa A | Director | SELL | $50K–$100K | 620 | $85.95 | Jun 5, 2024 |
| Harris Teresa A | Director | EXERCISE | N/A | 620 | — | Jun 5, 2024 |
| Messano Amy | Chief Marketing Of… | SELL | $1M+ | 20K | $90.51 | May 23, 2024 |
| Messano Amy | Chief Marketing Of… | EXERCISE | N/A | 20K | — | May 23, 2024 |
| Christ George J | 10% Owner | SELL | $1M+ | 13K | $85.85 | Apr 11, 2024 |
| Christ Revocable Trust | 10% Owner | SELL | $1M+ | 13K | $85.85 | Apr 11, 2024 |
| Harris Teresa A | Director | EXERCISE | N/A | 620 | — | Apr 3, 2024 |
| Harris Teresa A | Director | SELL | $50K–$100K | 620 | $84.00 | Apr 3, 2024 |
| Christ George J | 10% Owner | SELL | $1M+ | 83K | $85.99 | Apr 1, 2024 |
| Christ Revocable Trust | 10% Owner | SELL | $1M+ | 83K | $85.99 | Apr 1, 2024 |
| Christ George J | 10% Owner | SELL | $100K–$500K | 4K | $85.42 | Mar 28, 2024 |
| Christ Revocable Trust | 10% Owner | SELL | $100K–$500K | 4K | $85.42 | Mar 28, 2024 |
| Christ George J | 10% Owner | SELL | $1M+ | 13K | $86.71 | Mar 26, 2024 |
| Christ Revocable Trust | 10% Owner | SELL | $1M+ | 13K | $86.71 | Mar 26, 2024 |
| Messano Amy | Chief Marketing Of… | SELL | $15K–$50K | 236 | $83.65 | Feb 29, 2024 |
| Saravia Gilma | Chief People Officer | SELL | $50K–$100K | 1K | $83.65 | Feb 29, 2024 |
| Maitra Raoul | Chief Legal Officer | SELL | $15K–$50K | 189 | $83.65 | Feb 29, 2024 |
| Gayle Brian | Chief Accounting O… | SELL | $1K–$15K | 138 | $83.65 | Feb 29, 2024 |
| Kunju Ravi | Chief Product Stra… | SELL | $1K–$15K | 121 | $83.65 | Feb 29, 2024 |
| Brown Matthew Charles | CFO | SELL | $100K–$500K | 4K | $83.65 | Feb 29, 2024 |
| Dias Nelson | Chief Revenue Offi… | SELL | $15K–$50K | 375 | $83.65 | Feb 29, 2024 |
| Scapa James Ralph | CEO | SELL | $500K+ | 10K | $91.07 | Feb 20, 2024 |
| JRS Investments LLC | 10% Owner | SELL | $100K–$500K | 5K | $91.07 | Feb 20, 2024 |
| James R. Scapa Declaration of Trust | 10% Owner | SELL | $100K–$500K | 5K | $91.07 | Feb 20, 2024 |
| Christ George J | 10% Owner | SELL | $1M+ | 100K | $87.32 | Jan 25, 2024 |
| Christ Revocable Trust | 10% Owner | SELL | $1M+ | 100K | $87.32 | Jan 25, 2024 |
| Scapa James Ralph | CEO | SELL | $500K+ | 10K | $83.73 | Jan 18, 2024 |
| JRS Investments LLC | 10% Owner | SELL | $100K–$500K | 5K | $83.73 | Jan 18, 2024 |
| James R. Scapa Declaration of Trust | 10% Owner | SELL | $100K–$500K | 5K | $83.73 | Jan 18, 2024 |
| Christ George J | 10% Owner | SELL | $1M+ | 27K | $73.08 | Dec 1, 2023 |
| GC Investments LLC | 10% Owner | SELL | $1M+ | 27K | $73.08 | Dec 1, 2023 |
| Christ George J | 10% Owner | SELL | $1M+ | 109K | $73.93 | Nov 22, 2023 |
| GC Investments LLC | 10% Owner | SELL | $500K+ | 9K | $73.09 | Nov 22, 2023 |
| Christ Revocable Trust | 10% Owner | SELL | $1M+ | 100K | $74.00 | Nov 22, 2023 |
| Scapa James Ralph | CEO | SELL | $500K+ | 10K | $72.52 | Nov 17, 2023 |
| JRS Investments LLC | 10% Owner | SELL | $100K–$500K | 5K | $72.52 | Nov 17, 2023 |
| James R. Scapa Declaration of Trust | 10% Owner | SELL | $100K–$500K | 5K | $72.52 | Nov 17, 2023 |
| Harris Teresa A | Director | SELL | $100K–$500K | 2K | $73.16 | Nov 16, 2023 |
| Harris Teresa A | Director | EXERCISE | N/A | 2K | — | Nov 16, 2023 |
Institutional Ownership
13F filings as of Dec 31, 2025 · 1 funds holding
| Fund | Shares | Value | Type |
|---|---|---|---|
| HUNTINGTON NATIONAL BANK | 1 | $1K–$15K | SH |
Activist & 5%+ Owners
SC 13D/13G filings — investors holding 5%+ of outstanding shares
Matrix Capital Management Company, LP
SC 13G/A · Apr 7, 2025
0.0%
0 shares
SC 13G/A · Mar 26, 2025
0.0%
0 shares
SC 13G/A · Mar 26, 2025
0.0%
0 shares
SC 13G/A · Feb 5, 2025
12.5%
7.5M shares
SC 13G · Nov 21, 2024
3.8%
2.3M shares
Matrix Capital Management Company LP
SC 13G/A · Nov 13, 2024
20.9%
12.4M shares
SC 13G/A · Nov 8, 2024
22.3%
17.1M shares
SC 13G/A · Nov 8, 2024
13.9%
9.5M shares
SC 13G/A · Jul 8, 2024
13.8%
7.9M shares
The Vanguard Group - 23-1945930
SC 13G/A · Feb 13, 2024
10.6%
5.8M shares
Matrix Capital Management Company LP
SC 13G/A · Feb 13, 2024
22.4%
12.2M shares
SC 13G/A · Feb 13, 2024
23.9%
17.1M shares
SC 13G/A · Feb 13, 2024
15.8%
10.2M shares
SC 13G · Jan 31, 2024
5.3%
2.9M shares
SC 13G/A · Jan 25, 2024
8.4%
4.6M shares
The Vanguard Group - 23-1945930
SC 13G/A · Jun 9, 2023
10.1%
5.4M shares
Matrix Capital Management Company LP
SC 13G/A · Feb 13, 2023
20.8%
10.9M shares
SC 13G/A · Jan 31, 2023
7.7%
4.1M shares
Matrix Capital Management Company LP
SC 13G/A · Feb 14, 2022
16.9%
8.6M shares