Ipg Photonics (IPGP) 4: 10% owner sold 15,361 shares (Oct 6, 2026)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-10-02 10b5-1 Pre-arranged Plan: Yes --- Issuer --- Name: IPG PHOTONICS CORP (IPGP) CIK: 0001111928 --- Reporting Owner --- Name: IP FIBRE DEVICES LTD CIK: 0001130423 Role: 10%+ Owner --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Date: 2026-10-02 | Code: S (Open market sale) Shares: -9,876 | Price: $85.39 Total Value: $843,311.64 Shares Owned After: 6,396,113 | Ownership: D (Direct) Footnotes: [F2] The reported transaction involves sale transactions ranging from $85.00 to $85.94 per share. The weighted average price per share was $85.39. 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. [F1] The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 17, 2026. [Transaction #2] Security: Common Stock Date: 2026-10-02 | Code: S (Open market sale) Shares: -5,485 | Price: $86.09 Total Value: $472,203.65 Shares Owned After: 6,390,628 | Ownership: D (Direct) Footnotes: [F3] The reported transaction involves sale transactions ranging from $86.00 to $86.42 per share. The weighted average price per share was $86.09. 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. [F1] The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 17, 2026. --- Footnotes (Complete Index) --- F1: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 17, 2026. F2: The reported transaction involves sale transactions ranging from $85.00 to $85.94 per share. The weighted average price per share was $85.39. 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 $86.00 to $86.42 per share. The weighted average price per share was $86.09. 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. --- Signature --- /s/ /s/ Adam N. King, Attorney-in-Fact (2026-10-06)