SEC Form 4 · Updated Daily
IPGP
— IPG PHOTONICS CORPORATION OwnershipInsider and institutional ownership derived from SEC Form 4 filings. Click any owner to see their holdings across every company they’ve filed on, and how their position has changed over time.
Current Reporting Owners
| Owner | Role | Shares Owned | As Of | Last Activity |
|---|---|---|---|---|
| PLATONOV NIKOLAI | 10%+ Owner | 7,997,739 | 2011-12-02 | S |
| Valentin Gapontsev Trust I | 10%+ Owner | 6,652,192 | 2026-09-01 | S |
| IP FIBRE DEVICES LTD | 10%+ Owner | 6,396,113 | 2026-10-02 | S |
| GAPONTSEV DENIS | Officer | 1,601,007 | 2008-08-05 | S |
| GAPONTSEV VALENTIN P | 10%+ Owner · Director · Officer | 301,612 | 2020-11-17 | S |
| Samartsev Igor | Officer | 115,701 | 2026-05-12 | A |
| Pavlova Natalia | Director | 115,701 | 2026-05-12 | A |
| Gitin Mark Milton | Director · Officer | 87,232 | 2026-06-05 | F |
| Mammen Timothy PV | Officer | 79,150 | 2026-05-22 | S |
| Ovtchinnikov Alexander | 10%+ Owner · Officer | 76,113 | 2024-03-01 | A |
| CHILD MICHAEL C | Director | 68,625 | 2024-06-18 | A |
| Lopresti Angelo P | 10%+ Owner · Officer | 59,841 | 2026-06-29 | S |
| BuAbbud George H | Officer | 57,420 | 2013-02-14 | M |
| SCHERBAKOV EUGENE A | 10%+ Owner · Director | 45,162 | 2026-10-02 | S |
| DALTON JOHN H | Director | 39,624 | 2011-03-30 | S |
| Ness Trevor | Officer | 38,425 | 2026-03-01 | F |
| STUKALIN FELIX I | Director · Officer | 37,929 | 2023-03-01 | A |
| Blair Robert A | Director | 30,405 | 2015-05-11 | M |
| Meurice Eric | Director | 25,239 | 2026-05-12 | A |
| Shiner William H | Officer | 24,474 | 2012-11-12 | F |
| PEELER JOHN R | Director | 20,886 | 2026-08-26 | P |
| Krupke William F | Director | 19,467 | 2014-02-19 | M |
| Lego Catherine P | Director | 19,294 | 2020-11-06 | M |
| Dougherty Greg | Director | 18,334 | 2026-05-12 | A |
| GAUTHIER HENRY E | Director | 17,051 | 2019-05-30 | A |
| HURLEY WILLIAM S | Director | 16,260 | 2018-05-11 | M |
| Beecher Gregory R | Director | 12,216 | 2026-05-12 | A |
| Burgomaster Thomas J | Officer | 11,566 | 2025-03-01 | F |
| KENNEDY KOLLEEN T | Director | 11,513 | 2026-05-12 | A |
| Desmond Jeanmarie F. | Director | 10,486 | 2026-05-14 | S |
| Agnes Tang | Director | 10,324 | 2026-06-22 | S |
| SEIFERT THOMAS J | Director | 8,946 | 2022-05-24 | A |
| Bucher Paulus | Officer | 6,053 | 2026-08-08 | F |
| Buttarazzi Mary E. | Officer | 4,749 | 2026-03-17 | S |
| Kampfe Michael R | Director | 1,000 | 2012-06-05 | A |
| TA ASSOCIATES IX LLC | Reporting Owner | 0 | 2008-09-16 | J |
| TA IX LP | Reporting Owner | 0 | 2008-09-16 | S |
| TA ASSOCIATES, L.P. | Reporting Owner | 0 | 2008-09-16 | S |
| TA ASSOCIATES AP IV LP | Reporting Owner | 0 | 2008-09-16 | S |
| TA / ATLANTIC & PACIFIC IV LP | Reporting Owner | 0 | 2008-09-16 | S |
| TA ASSOCIATES VIII LLC | Reporting Owner | 0 | 2008-09-16 | S |
| TA ADVENT VIII LP | Reporting Owner | 0 | 2008-09-16 | J |
| TA INVESTORS LLC | Reporting Owner | 0 | 2008-09-16 | J |
| TA EXECUTIVES FUND LLC | Reporting Owner | 0 | 2008-09-16 | S |
Recent Filings
| Date | Owner | Activity | Shares | Price | Owned After |
|---|---|---|---|---|---|
| 2026-10-02 | SCHERBAKOV EUGENE A | Open-market sale | 3,048 | $85.30 | 45,162 |
| 2026-10-02 | IP FIBRE DEVICES LTD | Open-market sale | 5,485 | $86.09 | 6,390,628 |
| 2026-10-02 | IP FIBRE DEVICES LTD | Open-market sale | 9,876 | $85.39 | 6,396,113 |
| 2026-09-02 | Valentin Gapontsev Trust I | Open-market sale | 4,715 | $76.25 | 6,642,886 |
| 2026-09-02 | Valentin Gapontsev Trust I | Open-market sale | 4,591 | $75.65 | 6,647,601 |
| 2026-09-01 | Valentin Gapontsev Trust I | Open-market sale | 18,091 | $75.14 | 6,652,192 |
| 2026-08-26 | PEELER JOHN R | Open-market buy | 1,158 | $74.57 | 20,886 |
| 2026-08-26 | PEELER JOHN R | Open-market buy | 1,552 | $72.84 | 19,728 |
| 2026-08-08 | Bucher Paulus | Tax withholding | 663 | $90.23 | 6,053 |
| 2026-08-05 | IP FIBRE DEVICES LTD | Open-market sale | 550 | $98.71 | 6,405,989 |
| 2026-08-05 | IP FIBRE DEVICES LTD | Open-market sale | 4,324 | $97.81 | 6,406,539 |
| 2026-08-05 | IP FIBRE DEVICES LTD | Open-market sale | 1,325 | $96.76 | 6,410,863 |
| 2026-08-05 | IP FIBRE DEVICES LTD | Open-market sale | 11,912 | $95.31 | 6,412,188 |
| 2026-08-04 | IP FIBRE DEVICES LTD | Open-market sale | 12,202 | $95.18 | 6,424,100 |
| 2026-07-31 | SCHERBAKOV EUGENE A | Open-market sale | 241 | $88.68 | 48,210 |
| 2026-07-31 | SCHERBAKOV EUGENE A | Open-market sale | 300 | $87.45 | 48,451 |
| 2026-07-31 | SCHERBAKOV EUGENE A | Open-market sale | 200 | $86.34 | 48,751 |
| 2026-07-31 | SCHERBAKOV EUGENE A | Open-market sale | 783 | $85.72 | 48,951 |
| 2026-07-31 | IP FIBRE DEVICES LTD | Open-market sale | 300 | $88.59 | 6,436,302 |
| 2026-07-31 | IP FIBRE DEVICES LTD | Open-market sale | 200 | $87.45 | 6,436,602 |
| 2026-07-31 | IP FIBRE DEVICES LTD | Open-market sale | 506 | $86.14 | 6,436,802 |
| 2026-07-31 | IP FIBRE DEVICES LTD | Open-market sale | 25,994 | $85.76 | 6,437,308 |
| 2026-07-21 | Valentin Gapontsev Trust I | Open-market sale | 23,869 | $103.00 | 6,670,283 |
| 2026-07-21 | Valentin Gapontsev Trust I | Open-market sale | 24,347 | $102.04 | 6,694,152 |
| 2026-07-21 | Valentin Gapontsev Trust I | Open-market sale | 7,100 | $101.20 | 6,718,499 |
| 2026-07-21 | Valentin Gapontsev Trust I | Open-market sale | 1,000 | $100.08 | 6,725,599 |
| 2026-06-29 | SCHERBAKOV EUGENE A | Open-market sale | 200 | $106.66 | 49,734 |
| 2026-06-29 | SCHERBAKOV EUGENE A | Open-market sale | 1 | $104.63 | 49,934 |
| 2026-06-29 | SCHERBAKOV EUGENE A | Open-market sale | 100 | $102.92 | 49,935 |
| 2026-06-29 | SCHERBAKOV EUGENE A | Open-market sale | 250 | $101.24 | 50,035 |
| 2026-06-29 | SCHERBAKOV EUGENE A | Open-market sale | 973 | $100.43 | 50,285 |
| 2026-06-29 | Lopresti Angelo P | Open-market sale | 1,000 | $110.33 | 59,841 |
| 2026-06-29 | IP FIBRE DEVICES LTD | Open-market sale | 11,325 | $106.40 | 6,463,302 |
| 2026-06-29 | IP FIBRE DEVICES LTD | Open-market sale | 2,684 | $105.37 | 6,474,627 |
| 2026-06-29 | IP FIBRE DEVICES LTD | Open-market sale | 16,406 | $104.33 | 6,477,311 |
| 2026-06-29 | IP FIBRE DEVICES LTD | Open-market sale | 13,304 | $103.08 | 6,493,717 |
| 2026-06-29 | IP FIBRE DEVICES LTD | Open-market sale | 17,735 | $102.09 | 6,507,021 |
| 2026-06-29 | IP FIBRE DEVICES LTD | Open-market sale | 2,405 | $101.21 | 6,524,756 |
| 2026-06-29 | IP FIBRE DEVICES LTD | Open-market sale | 1,841 | $100.19 | 6,527,161 |
| 2026-06-22 | Agnes Tang | Open-market sale | 200 | $119.32 | 9,588 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.