| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Valentin Gapontsev Trust I | 10%+ Owner | 3 EXECUTIVE PARK DRIVE, SUITE 302, BEDFORD | /s/ Adam N. King, Attorney-in-Fact for Valentin Gapontsev Trust I | 15 Oct 2025 | 0001508155 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | IPGP | Common Stock | Sale | $136,844 | -1,667 | -0.02% | $82.09 | 7,057,432 | 13 Oct 2025 | Direct | F1, F2 |
| transaction | IPGP | Common Stock | Sale | $2,459,197 | -29,547 | -0.42% | $83.23 | 7,027,885 | 13 Oct 2025 | Direct | F1, F3 |
| transaction | IPGP | Common Stock | Sale | $88,053 | -1,050 | -0.01% | $83.86 | 7,026,835 | 13 Oct 2025 | Direct | F1, F4 |
| transaction | IPGP | Common Stock | Sale | $134,475 | -1,661 | -0.02% | $80.96 | 7,025,174 | 14 Oct 2025 | Direct | F1, F5 |
| transaction | IPGP | Common Stock | Sale | $246,734 | -3,002 | -0.04% | $82.19 | 7,022,172 | 14 Oct 2025 | Direct | F1, F6 |
| transaction | IPGP | Common Stock | Sale | $701,545 | -8,430 | -0.12% | $83.22 | 7,013,742 | 14 Oct 2025 | Direct | F1, F7 |
| transaction | IPGP | Common Stock | Sale | $288,624 | -3,436 | -0.05% | $84.00 | 7,010,306 | 14 Oct 2025 | Direct | F1, F8 |
| transaction | IPGP | Common Stock | Sale | $447,736 | -5,315 | -0.08% | $84.24 | 7,004,991 | 15 Oct 2025 | Direct | F1, F9 |
| transaction | IPGP | Common Stock | Sale | $437,715 | -5,166 | -0.07% | $84.73 | 6,999,825 | 15 Oct 2025 | Direct | F1, F10 |
| transaction | IPGP | Common Stock | Sale | $621,219 | -7,226 | -0.1% | $85.97 | 6,992,599 | 15 Oct 2025 | Direct | F1, F11 |
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 $81.41 to $82.31 per share. The weighted average price per share was $82.09. 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 $82.69 to $83.65 per share. The weighted average price per share was $83.23. 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 $83.71 to $83.94 per share. The weighted average price per share was $83.86. 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 $80.59 to $81.43 per share. The weighted average price per share was $80.96. 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 $81.70 to $82.68 per share. The weighted average price per share was $82.19. 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 $82.82 to $83.77 per share. The weighted average price per share was $83.22. 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 $83.87 to $84.19 per share. The weighted average price per share was $84.00. 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 $83.48 to $84.45 per share. The weighted average price per share was $84.24. 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 $84.48 to $85.26 per share. The weighted average price per share was $84.73. 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 $85.50 to $86.03 per share. The weighted average price per share was $85.97. 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. |