Company: IPGP
Filing Date: 2025-02-20
Form Type: S-3ASR
Source: 0001111928-25-000025
Chunk: 10

Company: IPG PHOTONICS CORP
Filing Date: 2025-02-20
Form: S-3ASR
Chunk 10
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7,200,599 |   |     | 16.9 |                          |     | 1,890,000 |                                                  |     | 5,310,599 |     | 12.5 |
| Valentin Gapontsev Trust III (2) |     |                                                |     |   899,720 |   |     |  2.1 |                          |     |   260,000 |                                                  |     |   639,720 |     |  1.5 |

(1) Includes 7,200,599 shares owned of record by Trust I. Dr. Eugene Scherbakov, a director of the Company, and Mr. Angelo Lopresti, an executive officer of the Company, are two of the three trustees of Trust I. In such role, Dr. Scherbakov and Mr. Lopresti share voting, investment and disposal powers with IQ EQ Trust Company, U.S., LLC ("IQ EQ"), the other trustee of Trust I which has no relationship to the Company. Each trustee of Trust I disclaims

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beneficial ownership of the shares held by such trust. The address of Trust I is 3 Executive Park Drive, Suite 302, Bedford, NH 03110.

(2) Includes 899,720 shares owned of record by Trust III. Dr. Eugene Scherbakov and Mr. Angelo Lopresti are two of the three trustees of Trust III. In such role, Dr. Scherbakov and Mr. Lopresti share voting, investment and disposal powers with IQ EQ, the other trustee of Trust III which has no relationship to the Company. Each trustee of Trust III disclaims beneficial ownership of the shares held by such trust. The address of Trust III is 3 Executive Park Drive, Suite 302, Bedford, NH 03110.

(3) Assumes that the Selling Stockholders dispose of all of their respective shares of common stock covered by this prospectus and do not acquire beneficial ownership of any additional shares of common stock. The registration of these shares of common stock does not necessarily mean that the Selling Stockholders will sell all or any portion of their respective shares of common stock covered by this prospectus.

### PLAN OF DISTRIBUTION
We are registering the shares of common stock held by the Selling Stockholders to permit the resale of such shares from time to time after the date of this prospectus. We will not receive any of the proceeds from the sale by the Selling Stockholders of the shares