| 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 | 16 Sep 2025 | 0001508155 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | IPGP | Common Stock | Sale | $3,051,983 | -37,894 | -0.53% | $80.54 | 7,087,705 | 15 Sep 2025 | Direct | F1, F2 |
| transaction | IPGP | Common Stock | Sale | $1,170,670 | -14,426 | -0.2% | $81.15 | 7,073,279 | 15 Sep 2025 | Direct | F1, F3 |
| transaction | IPGP | Common Stock | Sale | $1,143,901 | -14,180 | -0.2% | $80.67 | 7,059,099 | 16 Sep 2025 | Direct | F1, F4 |
| 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 $79.95 to $80.95 per share. The weighted average price per share was $80.54. 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 $80.96 to $81.25 per share. The weighted average price per share was $81.15. 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 $79.99 to $80.79 per share. The weighted average price per share was $80.67. 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. |