Comparable stake leader
Valentin Gapontsev Trust I
SEC ownership of IPG PHOTONICS CORP
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001111928.
Disclosed value leader
Valentin Gapontsev Trust I
Comparable rows
50/50
Latest evidence
31 Jul 2026
- Public ticker
- IPGP on Nasdaq
- Parsed ownership sources
-
13D/G, 3/4/5, and 13F
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
Valentin Gapontsev Trust I
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
50 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
Valentin Gapontsev Trust I
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
31 Jul 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001111928
- Issuer location
- Marlborough, MA
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of IPG PHOTONICS CORP (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Valentin Gapontsev Trust I
Disclosed value leader
Valentin Gapontsev Trust I
Comparable rows
50/50
Latest evidence
31 Jul 2026
13D/G
3/4/5
13F
Lead comparable stake: 34%
13D/G row: Valentin Gapontsev Trust I
Showing 1-8 of 50 holder rows.
Quick read
Valentin Gapontsev Trust I leads the comparable SEC ownership view at 34%.
50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Valentin Gapontsev Trust I's linked filing trail.
Comparable ownership
Top 5
Valentin Gapontsev Trust I
34%
IP FIBRE DEVICES LTD
15%
Igor Samartsev
2.3%
Natalia Pavlova
2.3%
Mark Milton Gitin
0.21%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Valentin Gapontsev Trust I |
13D/G
3/4/5
Shcherbakov Eugene A · 10%+ Owner
|
34%
|
$1,710,256,937
14,577,710 shares
|
-$136,442,104 | 18 Feb 2026 |
| IP FIBRE DEVICES LTD |
13D/G
3/4/5
10%+ Owner
|
15%
|
$758,274,591
6,463,302 shares
|
$0 | 22 Sep 2025 |
| Igor Samartsev |
3/4/5
SVP, Chief Scientist
|
2.3%
|
$109,837,147
958,523 shares
|
— | 12 May 2026 |
| Natalia Pavlova |
3/4/5
Director
|
2.3%
|
$109,837,147
958,523 shares
|
— | 12 May 2026 |
| Mark Milton Gitin |
3/4/5
CEO, Director
|
0.21%
|
$9,995,914
87,232 shares
|
— | 05 Jun 2026 |
| Timothy Pv Mammen |
3/4/5
SVP, Chief Financial Officer
|
0.18%
|
$9,200,842
76,438 shares
|
-$1,195,098 | 22 May 2026 |
| Angelo P. Lopresti |
3/4/5
SVP, Secretary & Gen Counsel, 10%+ Owner
|
0.14%
|
$6,602,257
59,841 shares
|
-$623,885 | 29 Jun 2026 |
| Eugene A. Scherbakov |
3/4/5
Director, 10%+ Owner
|
0.11%
|
$4,275,262
48,210 shares
|
-$1,609,277 | 31 Jul 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$89,099,872.
Buys
$0
Insiders: 0
Sells
$89,099,872
Insiders: 10
Net
-$89,099,872
Shares: -985,900
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 985,900
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 166,240 | $0 | $16,836,295 | -$16,836,295 |
| 3-6 | 0 | 133,867 | $0 | $17,658,094 | -$17,658,094 |
| 6-9 | 0 | 408,163 | $0 | $31,465,845 | -$31,465,845 |
| 9-12 | 0 | 277,630 | $0 | $23,139,639 | -$23,139,639 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-20 of 24 reporting-owner rows connected to IPG PHOTONICS CORP. Open a relationship link for the CIK-to-CIK filing trail.
Rows
24
Largest Forms 3/4/5 holder
Valentin Gapontsev Trust I
Net 12M change
-$86,650,980
Latest report
31 Jul 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Valentin Gapontsev Trust I | 10%+ Owner | $687,039,149 | -$40,770,392 | -5.6% | Filing P/S | 21 Jul 2026 |
| IP FIBRE DEVICES LTD | 10%+ Owner | $570,191,994 | -$40,963,860 | -6.7% | Filing P/S | 31 Jul 2026 |
| Igor Samartsev | SVP, Chief Scientist | $109,837,147 | Mixed | 12 May 2026 | ||
| Natalia Pavlova | Director | $109,837,147 | Mixed | 12 May 2026 | ||
| Mark Milton Gitin | CEO, Director | $9,995,914 | Mixed | 05 Jun 2026 | ||
| Timothy Pv Mammen | SVP, Chief Financial Officer | $9,200,842 | -$1,195,098 | -11% | Filing P/S | 22 May 2026 |
| Angelo P. Lopresti | SVP, Secretary & Gen Counsel, 10%+ Owner | $6,602,257 | -$623,885 | -8.6% | Filing P/S | 29 Jun 2026 |
| Alexander Ovtchinnikov | SVP, Chief Technology Officer, 10%+ Owner | $6,432,884 | Mixed | 01 Mar 2024 | ||
| Michael C. Child | Director | $5,846,850 | Mixed | 18 Jun 2024 | ||
| Trevor Ness | SVP, Chief Revenue Officer | $5,055,577 | -$550,874 | -9.8% | Mixed | 01 Mar 2026 |
| Eugene A. Scherbakov | Director, 10%+ Owner | $4,275,262 | -$1,609,277 | -27% | Filing P/S | 31 Jul 2026 |
| Felix I. Stukalin | SVP, Chief Operating Officer, Director | $4,007,471 | Mixed | 01 Mar 2023 | ||
| Eric Meurice | Director | $2,892,137 | -$274,926 | -8.7% | Mixed | 12 May 2026 |
| Greg Dougherty | Director | $2,100,893 | Mixed | 12 May 2026 | ||
| John R. Peeler | Director | $2,082,787 | Mixed | 12 May 2026 | ||
| Gregory R. Beecher | Director | $1,399,831 | Mixed | 12 May 2026 | ||
| Kolleen T. Kennedy | Director | $1,319,274 | Mixed | 12 May 2026 | ||
| Tang Agnes | Director | $1,144,040 | -$322,441 | -22% | Filing P/S | 22 Jun 2026 |
| Jeanmarie F. Desmond | Director | $1,107,111 | -$282,117 | -20% | Filing P/S | 14 May 2026 |
| Thomas J. Seifert | Director | $987,191 | Mixed | 24 May 2022 |
Recent insider transactions for IPG PHOTONICS CORP
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Ip Fibre Devices Ltd | IPGP | Common Stock | Sale | -0.42% | $2,316,899 | $85.81 | -27,000 | 6,436,302 | 31 Jul 2026 | Direct |
| Eugene A. Scherbakov | IPGP | Common Stock | Sale | -3.06% | $131,994 | $86.61 | -1,524 | 48,210 | 31 Jul 2026 | Direct |
| Valentin Gapontsev Trust I | IPGP | Common Stock | Sale | -0.84% | $5,761,475 | $102.31 | -56,316 | 6,670,283 | 21 Jul 2026 | Direct |
| Ip Fibre Devices Ltd | IPGP | Common Stock | Sale | -1.01% | $6,809,233 | $103.64 | -65,700 | 6,463,302 | 29 Jun 2026 | Direct |
| Angelo P. Lopresti | IPGP | Common Stock | Sale | -1.64% | $110,330 | $110.33 | -1,000 | 59,841 | 29 Jun 2026 | Direct |
| Eugene A. Scherbakov | IPGP | Common Stock | Sale | -2.97% | $154,757 | $101.55 | -1,524 | 49,734 | 29 Jun 2026 | Direct |
| Tang Agnes | IPGP | Common Stock | Sale | -13.6% | $178,078 | $117.85 | -1,511 | 9,588 | 22 Jun 2026 | Direct |
| Mark Milton Gitin | IPGP | Common Stock | Tax liability | -5.05% | -4,641 | 87,232 | 05 Jun 2026 | Direct | ||
| Timothy Pv Mammen | IPGP | Common Stock | Sale | -11.5% | $1,195,098 | $119.81 | -9,975 | 76,438 | 22 May 2026 | Direct |
| Jeanmarie F. Desmond | IPGP | Common Stock | Sale | -13.9% | $178,430 | $105.58 | -1,690 | 10,486 | 14 May 2026 | Direct |
| Kennedy Kolleen T. | IPGP | Common Stock | Award | 26.8% | 2,436 | 11,513 | 12 May 2026 | Direct | ||
| John R. Peeler | IPGP | Common Stock | Award | 15.5% | 2,436 | 18,176 | 12 May 2026 | Direct | ||
| Greg Dougherty | IPGP | Common Stock | Award | 15.3% | 2,436 | 18,334 | 12 May 2026 | Direct | ||
| Jeanmarie F. Desmond | IPGP | Common Stock | Award | 25% | 2,436 | 12,176 | 12 May 2026 | Direct | ||
| Eric Meurice | IPGP | Common Stock | Award | 10.7% | 2,436 | 25,239 | 12 May 2026 | Direct | ||
| Igor Samartsev | IPGP | Common Stock | Award | 2.15% | 2,436 | 115,701 | 12 May 2026 | By Wife | ||
| Igor Samartsev | IPGP | Common Stock | Award | 2.15% | 2,436 | 115,701 | 12 May 2026 | By Wife | ||
| Tang Agnes | IPGP | Common Stock | Award | 28.1% | 2,436 | 11,099 | 12 May 2026 | Direct | ||
| Gregory R. Beecher | IPGP | Common Stock | Award | 24.9% | 2,436 | 12,216 | 12 May 2026 | Direct | ||
| Mary E. Buttarazzi | IPGP | Common Stock | Sale | -9.53% | $58,110 | $116.22 | -500 | 4,749 | 17 Mar 2026 | Direct |
| Mark Milton Gitin | IPGP | Common Stock | Tax liability | -7.64% | -7,603 | 91,873 | 01 Mar 2026 | Direct | ||
| Angelo P. Lopresti | IPGP | Common Stock | Tax liability | -5.95% | -3,848 | 60,841 | 01 Mar 2026 | Direct | ||
| Timothy Pv Mammen | IPGP | Common Stock | Tax liability | -4.75% | -4,310 | 86,413 | 01 Mar 2026 | Direct | ||
| Trevor Ness | IPGP | Common Stock | Tax liability | -8.13% | -3,402 | 38,425 | 01 Mar 2026 | Direct | ||
| Mary E. Buttarazzi | IPGP | Common Stock | Tax liability | -7.65% | -435 | 5,249 | 01 Mar 2026 | Direct | ||
| Eugene A. Scherbakov | IPGP | Common Stock | Tax liability | -12.4% | -7,237 | 51,258 | 01 Mar 2026 | Direct | ||
| Igor Samartsev | IPGP | Common Stock | Tax liability | -7.41% | -836 | 10,449 | 01 Mar 2026 | Direct | ||
| Ip Fibre Devices Ltd | IPGP | Common Stock | Sale | -0.02% | $221,768 | $136.89 | -1,620 | 6,529,002 | 24 Feb 2026 | Direct |
| Eugene A. Scherbakov | IPGP | Common Stock | Sale | -4.41% | $372,141 | $137.83 | -2,700 | 58,495 | 24 Feb 2026 | Direct |
| Ip Fibre Devices Ltd | IPGP | Common Stock | Sale | -0.51% | $4,456,899 | $133.52 | -33,380 | 6,530,622 | 23 Feb 2026 | Direct |
| Ip Fibre Devices Ltd | IPGP | Common Stock | Sale | -0.44% | $3,848,311 | $131.94 | -29,167 | 6,564,002 | 20 Feb 2026 | Direct |
| Mary E. Buttarazzi | IPGP | Common Stock | Award | 45.9% | 1,789 | 5,684 | 18 Feb 2026 | Direct | ||
| Trevor Ness | IPGP | Common Stock | Award | 12.4% | 4,621 | 41,827 | 18 Feb 2026 | Direct | ||
| Timothy Pv Mammen | IPGP | Common Stock | Award | 7.27% | 6,146 | 90,723 | 18 Feb 2026 | Direct | ||
| Paulus Bucher | IPGP | Common Stock | Award | 60.5% | 2,531 | 6,716 | 18 Feb 2026 | Direct | ||
| Igor Samartsev | IPGP | Common Stock | Award | 1,688 | 1,688 | 18 Feb 2026 | Direct | |||
| Angelo P. Lopresti | IPGP | Common Stock | Award | 7.41% | 4,465 | 64,689 | 18 Feb 2026 | Direct | ||
| Mark Milton Gitin | IPGP | Common Stock | Award | 25% | 19,887 | 99,476 | 18 Feb 2026 | Direct | ||
| Valentin Gapontsev Trust I | IPGP | Common Stock | Sale | -0.98% | $8,700,865 | $130.84 | -66,500 | 6,726,599 | 17 Feb 2026 | Direct |
| Igor Samartsev | IPGP | Common Stock | Options Exercise | 54% | 3,363 | 9,597 | 17 Feb 2026 | Direct | ||
| Igor Samartsev | IPGP | Employee Stock Option (right to buy) | Options Exercise | -100% | -3,363 | 0 | 17 Feb 2026 | Direct | ||
| Eugene A. Scherbakov | IPGP | Common Stock | Tax liability | -8.56% | -5,727 | 61,195 | 13 Feb 2026 | Direct | ||
| Eugene A. Scherbakov | IPGP | Common Stock | Options Exercise | 12.8% | 7,592 | 66,922 | 13 Feb 2026 | Direct | ||
| Eugene A. Scherbakov | IPGP | Employee Stock Option (right to buy) | Options Exercise | -100% | -7,592 | 0 | 13 Feb 2026 | Direct | ||
| Angelo P. Lopresti | IPGP | Common Stock | Tax liability | -6.26% | -4,022 | 60,224 | 12 Feb 2026 | Direct | ||
| Angelo P. Lopresti | IPGP | Common Stock | Options Exercise | 10% | 5,861 | 64,246 | 12 Feb 2026 | Direct | ||
| Angelo P. Lopresti | IPGP | Employee Stock Option (right to buy) | Options Exercise | -100% | -5,861 | 0 | 12 Feb 2026 | Direct | ||
| Eric Meurice | IPGP | Common Stock | Sale | -3.18% | $71,250 | $95.00 | -750 | 22,803 | 02 Feb 2026 | Direct |
| Eric Meurice | IPGP | Common Stock | Options Exercise | 3.29% | 750 | 23,553 | 02 Feb 2026 | Direct | ||
| Eric Meurice | IPGP | Director Stock Option (right to buy) | Options Exercise | -100% | -750 | 0 | 02 Feb 2026 | Direct |
* marks a reported price that did not pass the local price check.