| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Valentin Gapontsev Trust I | 10%+ Owner | 3 EXECUTIVE PARK DRIVE, SUITE 302, BEDFORD | /s/ Angelo P. Lopresti, Attorney-in-fact for Valentin Gapontsev Trust I | 18 Feb 2026 | 0001508155 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | IPGP | Common Stock | Sale | $826,386 | -6,590 | -0.1% | $125.40 | 6,786,509 | 17 Feb 2026 | Direct | F1, F2 |
| transaction | IPGP | Common Stock | Sale | $861,571 | -6,820 | -0.1% | $126.33 | 6,779,689 | 17 Feb 2026 | Direct | F1, F3 |
| transaction | IPGP | Common Stock | Sale | $554,787 | -4,354 | -0.06% | $127.42 | 6,775,335 | 17 Feb 2026 | Direct | F1, F4 |
| transaction | IPGP | Common Stock | Sale | $643,190 | -5,012 | -0.07% | $128.33 | 6,770,323 | 17 Feb 2026 | Direct | F1, F5 |
| transaction | IPGP | Common Stock | Sale | $509,300 | -3,931 | -0.06% | $129.56 | 6,766,392 | 17 Feb 2026 | Direct | F1, F6 |
| transaction | IPGP | Common Stock | Sale | $643,841 | -4,931 | -0.07% | $130.57 | 6,761,461 | 17 Feb 2026 | Direct | F1, F7 |
| transaction | IPGP | Common Stock | Sale | $1,103,790 | -8,383 | -0.12% | $131.67 | 6,753,078 | 17 Feb 2026 | Direct | F1, F8 |
| transaction | IPGP | Common Stock | Sale | $2,102,777 | -15,882 | -0.24% | $132.40 | 6,737,196 | 17 Feb 2026 | Direct | F1, F9 |
| transaction | IPGP | Common Stock | Sale | $538,350 | -4,035 | -0.06% | $133.42 | 6,733,161 | 17 Feb 2026 | Direct | F1, F10 |
| transaction | IPGP | Common Stock | Sale | $16,765 | -125 | -0% | $134.12 | 6,733,036 | 17 Feb 2026 | Direct | F1 |
| transaction | IPGP | Common Stock | Sale | $187,719 | -1,381 | -0.02% | $135.93 | 6,731,655 | 17 Feb 2026 | Direct | F1, F11 |
| transaction | IPGP | Common Stock | Sale | $190,688 | -1,393 | -0.02% | $136.89 | 6,730,262 | 17 Feb 2026 | Direct | F1, F12 |
| transaction | IPGP | Common Stock | Sale | $108,854 | -790 | -0.01% | $137.79 | 6,729,472 | 17 Feb 2026 | Direct | F1, F13 |
| transaction | IPGP | Common Stock | Sale | $105,503 | -760 | -0.01% | $138.82 | 6,728,712 | 17 Feb 2026 | Direct | F1, F14 |
| transaction | IPGP | Common Stock | Sale | $14,058 | -100 | -0% | $140.58 | 6,728,612 | 17 Feb 2026 | Direct | F1 |
| transaction | IPGP | Common Stock | Sale | $53,381 | -376 | -0.01% | $141.97 | 6,728,236 | 17 Feb 2026 | Direct | F1, F15 |
| transaction | IPGP | Common Stock | Sale | $19,688 | -137 | -0% | $143.71 | 6,728,099 | 17 Feb 2026 | Direct | F1, F16 |
| transaction | IPGP | Common Stock | Sale | $69,259 | -480 | -0.01% | $144.29 | 6,727,619 | 17 Feb 2026 | Direct | F1, F17 |
| transaction | IPGP | Common Stock | Sale | $59,946 | -410 | -0.01% | $146.21 | 6,727,209 | 17 Feb 2026 | Direct | F1 |
| transaction | IPGP | Common Stock | Sale | $32,560 | -220 | -0% | $148.00 | 6,726,989 | 17 Feb 2026 | Direct | F1 |
| transaction | IPGP | Common Stock | Sale | $58,453 | -390 | -0.01% | $149.88 | 6,726,599 | 17 Feb 2026 | Direct | F1, F18 |
Buy Plan / Sale Plan: These are also open market purchases/sales of shares, but in this case the transaction is part of a trading plan. Rule 10b5-1 allows insiders to setup a trading plan to buy/sell stocks over a certain period of time. Since the purchases/sales are predetermined, this protects the insiders from violating insider trading law.
Transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c).
| Id | Content |
|---|---|
| F1 | The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on June 13, 2025. |
| F2 | The reported transaction involves sale transactions ranging from $124.92 to $125.86 per share. The weighted average price per share was $125.40. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price. |
| F3 | The reported transaction involves sale transactions ranging from $125.92 to $126.88 per share. The weighted average price per share was $126.33. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price. |
| F4 | The reported transaction involves sale transactions ranging from $126.92 to $127.90 per share. The weighted average price per share was $127.42. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price. |
| F5 | The reported transaction involves sale transactions ranging from $127.92 to $128.80 per share. The weighted average price per share was $128.33. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price. |
| F6 | The reported transaction involves sale transactions ranging from $129.02 to $130.01 per share. The weighted average price per share was $129.56. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price. |
| F7 | The reported transaction involves sale transactions ranging from $130.03 to $131.02 per share. The weighted average price per share was $130.57. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price. |
| F8 | The reported transaction involves sale transactions ranging from $131.03 to $132.02 per share. The weighted average price per share was $131.67. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price. |
| F9 | The reported transaction involves sale transactions ranging from $132.03 to $132.99 per share. The weighted average price per share was $132.40. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price. |
| F10 | The reported transaction involves sale transactions ranging from $133.05 to $133.87 per share. The weighted average price per share was $133.42. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price. |
| F11 | The reported transaction involves sale transactions ranging from $135.40 to $136.39 per share. The weighted average price per share was $135.93. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price. |
| F12 | The reported transaction involves sale transactions ranging from $136.45 to $137.41 per share. The weighted average price per share was $136.89. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price. |
| F13 | The reported transaction involves sale transactions ranging from $137.46 to $138.44 per share. The weighted average price per share was $137.79. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price. |
| F14 | The reported transaction involves sale transactions ranging from $138.50 to $139.10 per share. The weighted average price per share was $138.82. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price. |
| F15 | The reported transaction involves sale transactions ranging from $141.72 to $142.46 per share. The weighted average price per share was $141.97. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price. |
| F16 | The reported transaction involves sale transactions ranging from $143.00 to $143.72 per share. The weighted average price per share was $143.71. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price. |
| F17 | The reported transaction involves sale transactions ranging from $144.20 to $144.51 per share. The weighted average price per share was $144.29. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price. |
| F18 | The reported transaction involves sale transactions ranging from $149.12 to $150.01 per share. The weighted average price per share was $149.88. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price. |