Valentin Gapontsev Trust I is 10% Owner at IPG PHOTONICS CORP (IPGP). They have made 34 open-market trades across 1 company since 2011, most recently 2026-11-03.
CIK 0001508155
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 34 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| IPGP | 6,622,234 | $464.3M |
Shares reported on the most recent Form 4, priced at the 2026-11-04 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| 7d | 30d | 90d | |
|---|---|---|---|
| Accuracy | 56% | 59% | 65% |
| Avg Move | -0.4% | +0.5% | -4.3% |
| Scored | 34 | 34 | 34 |
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| IPGP | SELL · 10b5-1 | 2026-11-02 | 2026-11-04 | $75.18 | $1.6M | — | — | — |
| IPGP | SELL · 10b5-1 | 2026-09-01 | 2026-09-03 | $75.42 | $2.1M | -1.7% | +6.6% | — |
| IPGP | SELL · 10b5-1 | 2026-07-21 | 2026-07-22 | $102.31 | $5.8M | -11.6% | -25.7% | -26.6% |
| IPGP | SELL | 2026-02-17 | 2026-02-18 | $130.84 | $8.7M | -2.0% | -16.3% | -17.8% |
| IPGP | SELL · 10b5-1 | 2026-01-15 | 2026-01-16 | $80.10 | $637K | +16.5% | +69.4% | +51.8% |
| IPGP | SELL | 2026-01-12 | 2026-01-14 | $76.93 | $4.5M | +14.9% | +95.1% | +57.7% |
| IPGP | SELL · 10b5-1 | 2025-12-15 | 2025-12-16 | $77.40 | $10.3M | -5.3% | +3.9% | +48.9% |
| IPGP | SELL · 10b5-1 | 2025-11-17 | 2025-11-19 | $76.49 | $9.8M | +5.6% | -1.6% | +75.0% |
| IPGP | SELL · 10b5-1 | 2025-10-13 | 2025-10-15 | $83.63 | $10.7M | -0.2% | -8.7% | -12.0% |
| IPGP | SELL | 2025-09-15 | 2025-09-16 | $80.70 | $10.7M | -1.4% | +5.9% | -4.6% |
| IPGP | SELL | 2025-03-06 | 2025-03-07 | $62.62 | $9.4M | +8.1% | -15.1% | +11.6% |
| IPGP | SELL · 10b5-1 | 2024-04-23 | 2024-04-25 | $85.86 | $1.5M | +1.4% | -5.1% | -0.4% |
| IPGP | SELL · 10b5-1 | 2024-03-25 | 2024-03-27 | $89.51 | $1.6M | +0.7% | -1.8% | -9.3% |
| IPGP | SELL · 10b5-1 | 2024-02-23 | 2024-02-27 | $85.68 | $857K | +5.9% | +6.4% | -1.7% |
| IPGP | SELL · 10b5-1 | 2023-12-08 | 2023-12-11 | $99.48 | $1.6M | +7.1% | +0.2% | -10.3% |
| IPGP | SELL · 10b5-1 | 2023-11-24 | 2023-11-28 | $95.34 | $787K | +3.2% | +14.3% | -11.6% |
| IPGP | SELL · 10b5-1 | 2023-11-08 | 2023-11-13 | $91.69 | $1.5M | +1.7% | +9.5% | +10.6% |
| IPGP | SELL · 10b5-1 | 2023-10-24 | 2023-10-26 | $91.74 | $1.5M | +3.5% | +8.0% | +10.7% |
| IPGP | SELL · 10b5-1 | 2023-10-09 | 2023-10-11 | $95.57 | $1.6M | -4.9% | -5.2% | +6.6% |
| IPGP | SELL · 10b5-1 | 2023-09-25 | 2023-09-27 | $100.00 | $825K | -3.2% | -10.7% | +12.0% |
| IPGP | SELL · 10b5-1 | 2023-09-08 | 2023-09-12 | $101.88 | $1.7M | +0.7% | -6.1% | +1.0% |
| IPGP | SELL · 10b5-1 | 2023-08-24 | 2023-08-25 | $102.60 | $1.7M | +0.8% | -2.5% | -7.0% |
| IPGP | SELL · 10b5-1 | 2023-08-08 | 2023-08-10 | $109.75 | $1.8M | -3.8% | -4.5% | -12.9% |
| IPGP | SELL · 10b5-1 | 2023-07-24 | 2023-07-26 | $130.32 | $1.9M | -15.1% | -22.1% | -29.7% |
| IPGP | SELL · 10b5-1 | 2023-07-10 | 2023-07-12 | $133.82 | $2.2M | -8.8% | -25.9% | -31.5% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.