| 2016-12-08 | Samartsev Igor | Chief Technology Officer | Sell | 2,000 | $98.66 | $197,320.00 | -2.4% | → |
| 2016-12-01 | Lopresti Angelo P | SVP, Secretary & Gen Counsel | Sell | 750 | $94.16 | $70,620.00 | -1.8% | → |
| 2016-11-07 | Lopresti Angelo P | SVP, Secretary & Gen Counsel | Sell | 5,589 | $96.30 | $538,220.70 | -11.8% | → |
| 2016-11-01 | Lopresti Angelo P | SVP, Secretary & Gen Counsel | Sell | 1,911 | $96.31 | $184,048.41 | -3.9% | → |
| 2016-08-03 | Lego Catherine P | - | Buy | 3,000 | $83.12 | $249,360.00 | +99.6% | → |
| 2016-06-30 | Valentin Gapontsev Trust I | - | Sell | 22,000 | $80.07 | $1,761,540.00 | -0.3% | → |
| 2016-06-23 | Valentin Gapontsev Trust I | - | Sell | 500 | $85.06 | $42,530.00 | - | → |
| 2016-05-25 | Valentin Gapontsev Trust I | - | Sell | 10,000 | $85.06 | $850,552.00 | - | → |
| 2016-04-27 | Valentin Gapontsev Trust I | - | Sell | 22,500 | $99.19 | $2,231,867.88 | - | → |
| 2016-04-26 | GAUTHIER HENRY E | - | Sale+OE | 10,001 | $100.42 | $1,004,300.42 | -36.4% | → |
| 2016-04-26 | Burgomaster Thomas J | Chief Accounting Officer | Sale+OE | 5,000 | $97.75 | $488,772.00 | -22.7% | → |
| 2016-04-22 | Ovtchinnikov Alexander | SVP, Components | Sale+OE | 3,584 | $99.12 | $355,246.08 | -4.7% | → |
| 2016-04-21 | Ovtchinnikov Alexander | SVP, Components | Sale+OE | 15,416 | $99.03 | $1,526,640.00 | -9.6% | → |
| 2016-04-13 | Shcherbakov Eugene A | SVP, MD IPG Laser GmbH | Sale+OE | 2,750 | $98.50 | $270,875.00 | -16.3% | → |
| 2016-04-01 | Lopresti Angelo P | SVP, Secretary & Gen Counsel | Sale+OE | 4,000 | $95.54 | $382,160.00 | -7.5% | → |
| 2016-03-30 | GAUTHIER HENRY E | - | Sale+OE | 8,899 | $96.91 | $862,402.09 | -33.7% | → |
| 2016-03-29 | Lopresti Angelo P | SVP, Secretary & Gen Counsel | Sell | 833 | $97.00 | $80,801.00 | -1.6% | → |
| 2016-03-29 | Shcherbakov Eugene A | SVP, MD IPG Laser GmbH | Sale+OE | 5,562 | $96.25 | $535,318.12 | -16.0% | → |
| 2016-03-29 | Valentin Gapontsev Trust I | - | Sell | 5,000 | $96.31 | $481,538.00 | - | → |
| 2016-03-28 | Mammen Timothy PV | SVP, Chief Financial Officer | Sale+OE | 2,757 | $95.24 | $262,576.68 | -8.4% | → |
| 2016-03-23 | Valentin Gapontsev Trust I | - | Sell | 12,500 | $92.98 | $1,162,250.00 | -0.2% | → |
| 2016-03-18 | Mammen Timothy PV | SVP, Chief Financial Officer | Sale+OE | 2,243 | $95.03 | $213,152.29 | -7.0% | → |
| 2016-03-18 | Ness Trevor | SVP, Worldwide Sales & Mrkting | Sell | 1,250 | $94.41 | $118,012.50 | -9.9% | → |
| 2016-03-17 | Mammen Timothy PV | SVP, Chief Financial Officer | Sale+OE | 5,000 | $92.85 | $464,250.00 | -14.3% | → |
| 2016-03-16 | IP FIBRE DEVICES LTD | - | Sell | 25,000 | $89.80 | $2,245,000.00 | -0.4% | → |
| 2016-03-11 | Valentin Gapontsev Trust I | - | Sell | 2,500 | $91.12 | $227,800.00 | - | → |
| 2016-03-11 | IP FIBRE DEVICES LTD | - | Sell | 5,000 | $90.87 | $454,350.00 | - | → |
| 2016-03-03 | IP FIBRE DEVICES LTD | - | Sell | 20,000 | $85.39 | $1,707,800.00 | -0.3% | → |
| 2016-03-03 | Valentin Gapontsev Trust I | - | Sell | 10,000 | $85.36 | $853,600.00 | -0.1% | → |
| 2015-12-02 | HURLEY WILLIAM S | - | Sale+OE | 6,667 | $93.65 | $624,364.55 | -34.0% | → |
| 2015-11-11 | Mammen Timothy PV | SVP, Chief Financial Officer | Sale+OE | 5,000 | $90.93 | $454,650.00 | -15.8% | → |
| 2015-11-06 | Mammen Timothy PV | SVP, Chief Financial Officer | Sale+OE | 5,000 | $87.81 | $439,050.00 | -15.8% | → |
| 2015-11-04 | Mammen Timothy PV | SVP, Chief Financial Officer | Sale+OE | 5,000 | $86.41 | $432,050.00 | -15.8% | → |
| 2015-11-02 | GAPONTSEV VALENTIN P | CEO & Chairman of the Board | Sell | 4,300 | $85.21 | $366,403.00 | -1.8% | → |
| 2015-10-28 | GAPONTSEV VALENTIN P | CEO & Chairman of the Board | Sell | 100 | $85.00 | $8,500.00 | - | → |
| 2015-08-11 | Lopresti Angelo P | SVP, Secretary & Gen Counsel | Sell | 1,925 | $95.00 | $182,875.00 | -1.9% | → |
| 2015-08-10 | GAPONTSEV VALENTIN P | CEO & Chairman of the Board | Sell | 10,000 | $95.33 | $953,297.70 | -2.0% | → |
| 2015-08-04 | GAPONTSEV VALENTIN P | CEO & Chairman of the Board | Sell | 10,000 | $92.24 | $922,400.00 | -3.8% | → |
| 2015-07-29 | GAPONTSEV VALENTIN P | CEO & Chairman of the Board | Sell | 10,000 | $91.28 | $912,800.00 | -3.7% | → |
| 2015-06-04 | GAPONTSEV VALENTIN P | CEO & Chairman of the Board | Sell | 15,000 | $97.79 | $1,466,850.00 | -5.3% | → |