| 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 | 14 Jan 2026 | 0001508155 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | IPGP | Common Stock | Sale | $1,224,153 | -16,065 | -0.23% | $76.20 | 6,843,534 | 12 Jan 2026 | Direct | F1, F2 |
| transaction | IPGP | Common Stock | Sale | $147,858 | -1,928 | -0.03% | $76.69 | 6,841,606 | 12 Jan 2026 | Direct | F1, F3 |
| transaction | IPGP | Common Stock | Sale | $1,285,046 | -16,752 | -0.24% | $76.71 | 6,824,854 | 13 Jan 2026 | Direct | F1, F4 |
| transaction | IPGP | Common Stock | Sale | $487,723 | -6,277 | -0.09% | $77.70 | 6,818,577 | 13 Jan 2026 | Direct | F1, F5 |
| transaction | IPGP | Common Stock | Sale | $283,056 | -3,667 | -0.05% | $77.19 | 6,814,910 | 14 Jan 2026 | Direct | F1, F6 |
| transaction | IPGP | Common Stock | Sale | $1,021,533 | -13,159 | -0.19% | $77.63 | 6,801,751 | 14 Jan 2026 | Direct | F1, F7 |
| transaction | IPGP | Common Stock | Sale | $54,985 | -700 | -0.01% | $78.55 | 6,801,051 | 14 Jan 2026 | Direct | F1, F8 |
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 $75.47 to $76.45 per share. The weighted average price per share was $76.20. 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 $76.61 to $76.82 per share. The weighted average price per share was $76.69. 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 $76.29 to $77.24 per share. The weighted average price per share was $76.71. 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. |
| F5 | The reported transaction involves sale transactions ranging from $77.31 to $78.00 per share. The weighted average price per share was $77.70. 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 $76.31 to $77.30 per share. The weighted average price per share was $77.19. 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 $77.31 to $78.22 per share. The weighted average price per share was $77.63. 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 $78.34 to $78.75 per share. The weighted average price per share was $78.55. 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. |