| 2018-06-06 | Burgomaster Thomas J | Chief Accounting Officer | Sale+OE | 5,400 | $246.72 | $1,332,274.14 | -11.6% | → |
| 2018-05-21 | Valentin Gapontsev Trust I | - | Sell | 2,000 | $245.63 | $491,260.00 | - | → |
| 2018-05-14 | Valentin Gapontsev Trust I | - | Sell | 10,000 | $253.88 | $2,538,800.00 | -0.1% | → |
| 2018-05-11 | HURLEY WILLIAM S | - | Sale+OE | 5,255 | $251.42 | $1,321,212.10 | -32.3% | → |
| 2018-05-10 | Ness Trevor | SVP, Worldwide Sales & Mrkting | Sale+OE | 6,000 | $250.44 | $1,502,640.00 | -24.4% | → |
| 2018-05-07 | Valentin Gapontsev Trust I | - | Sell | 20,000 | $233.73 | $4,674,500.00 | -0.1% | → |
| 2018-03-14 | HURLEY WILLIAM S | - | Sale+OE | 3,500 | $255.93 | $895,755.00 | -24.1% | → |
| 2018-03-12 | PEELER JOHN R | - | Sale+OE | 2,266 | $252.95 | $573,184.70 | -24.4% | → |
| 2018-03-09 | PEELER JOHN R | - | Sale+OE | 2,734 | $250.80 | $685,687.20 | -28.1% | → |
| 2018-03-01 | Mammen Timothy PV | SVP, Chief Financial Officer | Sale+OE | 12,500 | $243.41 | $3,042,625.00 | -27.4% | → |
| 2018-02-01 | Mammen Timothy PV | SVP, Chief Financial Officer | Sale+OE | 5,000 | $252.46 | $1,262,300.00 | -13.9% | → |
| 2018-01-19 | Mammen Timothy PV | SVP, Chief Financial Officer | Sale+OE | 2,500 | $261.53 | $653,825.00 | -7.4% | → |
| 2018-01-16 | Lopresti Angelo P | SVP, Secretary & Gen Counsel | Sale+OE | 9,500 | $261.49 | $2,484,155.00 | -20.3% | → |
| 2018-01-12 | GAUTHIER HENRY E | - | Sell | 5,000 | $257.52 | $1,287,600.00 | -24.9% | → |
| 2018-01-08 | Shcherbakov Eugene A | SVP, MD IPG Laser GmbH | Sale+OE | 9,500 | $256.56 | $2,437,320.00 | -37.3% | → |
| 2018-01-02 | Samartsev Igor | Chief Technology Officer | Sale+OE | 8,000 | $221.59 | $1,772,720.00 | -2.2% | → |
| 2017-12-04 | Ness Trevor | SVP, Worldwide Sales & Mrkting | Sale+OE | 10,000 | $208.17 | $2,081,700.00 | -43.7% | → |
| 2017-11-17 | Samartsev Igor | Chief Technology Officer | Sell | 1,850 | $234.10 | $433,085.00 | -2.3% | → |
| 2017-10-16 | Shcherbakov Eugene A | SVP, MD IPG Laser GmbH | Sale+OE | 9,500 | $198.79 | $1,888,505.00 | -37.3% | → |
| 2017-08-24 | HURLEY WILLIAM S | - | Sale+OE | 8,167 | $165.42 | $1,350,985.14 | -42.6% | → |
| 2017-08-17 | Mammen Timothy PV | SVP, Chief Financial Officer | Sale+OE | 11,600 | $166.98 | $1,936,968.00 | -27.2% | → |
| 2017-08-08 | Mammen Timothy PV | SVP, Chief Financial Officer | Sale+OE | 10,000 | $162.87 | $1,628,700.00 | -24.3% | → |
| 2017-08-08 | Lopresti Angelo P | SVP, Secretary & Gen Counsel | Sale+OE | 11,750 | $163.33 | $1,919,127.50 | -23.7% | → |
| 2017-08-03 | Ovtchinnikov Alexander | SVP, Components | Sale+OE | 12,000 | $160.30 | $1,923,600.00 | -14.4% | → |
| 2017-07-17 | Shcherbakov Eugene A | SVP, MD IPG Laser GmbH | Sale+OE | 8,500 | $154.28 | $1,311,380.00 | -34.8% | → |
| 2017-07-07 | Burgomaster Thomas J | Chief Accounting Officer | Sale+OE | 11,419 | $144.30 | $1,647,714.64 | -25.2% | → |
| 2017-06-30 | Ness Trevor | SVP, Worldwide Sales & Mrkting | Sale+OE | 5,000 | $145.69 | $728,450.00 | -27.9% | → |
| 2017-06-05 | SEIFERT THOMAS J | - | Sale+OE | 2,849 | $141.47 | $403,048.03 | -31.0% | → |
| 2017-06-01 | SEIFERT THOMAS J | - | Sale+OE | 3,950 | $139.87 | $552,486.50 | -41.2% | → |
| 2017-05-30 | Samartsev Igor | Chief Technology Officer | Sell | 2,000 | $140.14 | $280,280.00 | -1.8% | → |
| 2017-05-11 | Lopresti Angelo P | SVP, Secretary & Gen Counsel | Sell | 4,626 | $138.00 | $638,388.00 | -10.9% | → |
| 2017-05-10 | Valentin Gapontsev Trust I | - | Sell | 23,800 | $135.40 | $3,222,444.80 | -0.2% | → |
| 2017-05-02 | Valentin Gapontsev Trust I | - | Sell | 200 | $140.00 | $28,000.00 | - | → |
| 2016-12-15 | SEIFERT THOMAS J | - | Sell | 990 | $100.02 | $99,019.80 | -13.1% | → |
| 2016-12-15 | Samartsev Igor | Chief Technology Officer | Sale+OE | 4,000 | $99.35 | $397,400.00 | -4.7% | → |
| 2016-12-13 | HURLEY WILLIAM S | - | Sell | 5,000 | $99.62 | $498,100.00 | -33.7% | → |
| 2016-12-09 | Samartsev Igor | Chief Technology Officer | Sell | 2,000 | $99.24 | $198,480.00 | -2.4% | → |