| Type | Filed | Filer | Subject | Shares Owned | Percent Owned | |
|---|---|---|---|---|---|---|
| SC 13G | 2020-01-21 | GAPONTSEV VALENTIN P | IPG PHOTONICS CORP | 7,397,642 | 13.9% | EDGAR |
| SC 13G/A | 2019-02-13 | VANGUARD GROUP INC | IPG PHOTONICS CORP | 3,707,827 | 6.9% | EDGAR |
| SC 13G/A | 2018-10-10 | BlackRock Inc. | IPG PHOTONICS CORP | 2,629,599 | 4.9% | EDGAR |
| SC 13G | 2018-02-13 | IPG PHOTONICS CORP | IPG PHOTONICS CORP | 7,249,935 | 13.5% | EDGAR |
| SC 13G/A | 2018-02-09 | VANGUARD GROUP INC | IPG PHOTONICS CORP | 3,121,013 | 5.8% | EDGAR |
| SC 13G/A | 2018-01-25 | BlackRock Inc. | IPG PHOTONICS CORP | 3,874,614 | 7.2% | EDGAR |
| SC 13G/A | 2017-11-09 | FMR LLC | IPG PHOTONICS CORP | 119,163 | 0.2% | EDGAR |
| SC 13G/A | 2017-02-14 | FMR LLC | IPG PHOTONICS CORP | 2,963,421 | 5.6% | EDGAR |
| SC 13G | 2017-02-13 | IPG PHOTONICS CORP | IPG PHOTONICS CORP | 7,249,935 | 13.7% | EDGAR |
| SC 13G | 2017-02-10 | VANGUARD GROUP INC | IPG PHOTONICS CORP | 2,680,867 | 5.0% | EDGAR |
| SC 13G | 2017-01-30 | BlackRock Inc. | IPG PHOTONICS CORP | 2,707,306 | 5.1% | EDGAR |
| SC 13G/A | 2016-04-11 | FMR LLC | IPG PHOTONICS CORP | 5,455,700 | 10.3% | EDGAR |
| SC 13G | 2016-02-12 | FMR LLC | IPG PHOTONICS CORP | 4,661,134 | 8.8% | EDGAR |
| SC 13G/A | 2016-01-26 | IPG PHOTONICS CORP | IPG PHOTONICS CORP | 7,299,935 | 13.8% | EDGAR |
| SC 13D/A | 2015-02-11 | IPG PHOTONICS CORP | IPG PHOTONICS CORP | 14,786,003 | 28.3% | EDGAR |
| SC 13G/A | 2015-02-11 | PRICE T ROWE ASSOCIATES INC /MD/ | IPG PHOTONICS CORP | 828,157 | 1.5% | EDGAR |
| SC 13G | 2015-02-11 | IPG PHOTONICS CORP | IPG PHOTONICS CORP | 7,399,935 | 14.2% | EDGAR |
| SC 13G/A | 2015-02-10 | COLUMBIA WANGER ASSET MANAGEMENT LLC | IPG PHOTONICS CORP | 10 | - | EDGAR |
| SC 13G/A | 2015-01-30 | Artisan Partners Limited Partnership | IPG PHOTONICS CORP | 1,402,895 | 2.7% | EDGAR |
| SC 13G/A | 2014-03-24 | Artisan Partners Limited Partnership | IPG PHOTONICS CORP | 3,892,196 | 7.5% | EDGAR |