GC Investments LLC is 10% Owner at Altair Engineering Inc. (ALTR). They have made 14 open-market trades across 1 company since 2019, most recently 2025-03-26.
CIK 0001720808
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
0 open-market purchases, against 14 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| ALTR | 300,000 | $33.6M |
Shares reported on the most recent Form 4, priced at the 2024-10-15 close.
| 7d | 30d | 90d | |
|---|---|---|---|
| Accuracy | 29% | 36% | 43% |
| Avg Move | +1.1% | +0.4% | +3.7% |
| Scored | 14 | 14 | 14 |
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| ALTR | SELL | 2024-10-11 | 2024-10-15 | $95.24 | $9.5M | +9.2% | +9.5% | +16.3% |
| ALTR | SELL | 2024-06-12 | 2024-06-13 | $97.23 | $9.7M | +2.4% | +0.8% | -11.0% |
| ALTR | SELL | 2024-05-20 | 2024-05-22 | $91.70 | $4.6M | -3.9% | +5.1% | -5.2% |
| ALTR | SELL | 2023-12-08 | 2023-12-11 | $71.58 | $327K | +2.7% | +14.8% | +13.2% |
| ALTR | SELL | 2023-12-01 | 2023-12-05 | $72.79 | $3.3M | +3.8% | +9.3% | +20.0% |
| ALTR | SELL | 2023-11-29 | 2023-12-01 | $73.08 | $2.0M | +3.3% | +9.8% | +19.6% |
| ALTR | SELL | 2023-11-21 | 2023-11-22 | $73.09 | $627K | -0.8% | +16.3% | +22.7% |
| ALTR | SELL | 2023-04-14 | 2023-04-17 | $71.13 | $3.6M | -2.0% | -3.2% | +6.3% |
| ALTR | SELL | 2023-03-14 | 2023-03-16 | $66.02 | $3.3M | +2.1% | +3.2% | +12.2% |
| ALTR | SELL | 2023-03-10 | 2023-03-14 | $64.77 | $3.2M | +5.2% | +9.6% | +16.7% |
| ALTR | SELL | 2019-08-01 | 2019-08-05 | $41.37 | $299K | -14.9% | -15.5% | -7.5% |
| ALTR | SELL | 2019-07-12 | 2019-07-16 | $41.44 | $290K | +2.4% | -18.8% | -17.4% |
| ALTR | SELL | 2019-07-11 | 2019-07-15 | $42.22 | $546K | +1.9% | -18.3% | -17.2% |
| ALTR | SELL | 2019-07-10 | 2019-07-12 | $42.21 | $847K | +3.5% | -17.3% | -16.8% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.