[Form 4] IPG PHOTONICS CORP Insider Trading Activity

Rhea-AI Filing Summary

IPG Photonics (IPGP) reported insider share sales by a major holder. On November 17–18, 2025, the reporting person sold a total of 66,500 shares of common stock in multiple open-market transactions at weighted average prices ranging from $75.88 to $79.33 per share. These sales were made under a pre-arranged Rule 10b5-1 trading plan adopted on June 13, 2025.

After the transactions, the reporting person directly beneficially owned 6,926,099 IPG Photonics shares, remaining a large shareholder. The filing notes that detailed price breakdowns for each trade price within the stated ranges are available upon request to the company, the SEC staff, or security holders.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

X

Check this box to indicate that a 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). See Instruction 10.

1. Name and Address of Reporting Person^*

Valentin Gapontsev Trust I

(Last) (First) (Middle)

3 EXECUTIVE PARK DRIVE, SUITE 302

(Street)

BEDFORD NH 03110

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
IPG PHOTONICS CORP [ IPGP ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
11/17/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	11/17/2025		S		9,932	D(1)	$76.63(2)	6,982,667	D
Common Stock	11/17/2025		S		4,852	D(1)	$78.5(3)	6,977,815	D
Common Stock	11/17/2025		S		3,815	D(1)	$79.33(4)	6,974,000	D
Common Stock	11/18/2025		S		27,126	D(1)	$75.88(5)	6,946,874	D
Common Stock	11/18/2025		S		20,775	D(1)	$76.45(6)	6,926,099	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. 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.

2. The reported transaction involves sale transactions ranging from $76.18 to $77.06 per share. The weighted average price per share was $76.63. 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.

3. The reported transaction involves sale transactions ranging from $77.91 to $78.86 per share. The weighted average price per share was $78.50. 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.

4. The reported transaction involves sale transactions ranging from $78.98 to $79.60 per share. The weighted average price per share was $79.33. 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.

5. The reported transaction involves sale transactions ranging from $75.17 to $76.15 per share. The weighted average price per share was $75.88. 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.

6. The reported transaction involves sale transactions ranging from $76.22 to $77.00 per share. The weighted average price per share was $76.45. 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.

Remarks:

	/s/ Adam N. King, Attorney-in-Fact for Valentin Gapontsev Trust I	11/19/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What insider transaction did IPG Photonics (IPGP) disclose in this Form 4?

The filing shows that a reporting person sold 66,500 shares of IPG Photonics common stock in several open-market transactions on November 17–18, 2025.

At what prices were the IPG Photonics (IPGP) shares sold?

The sales occurred at weighted average prices of $76.63, $78.50, $79.33, $75.88 and $76.45 per share, with each line item representing trades within specified price ranges.

How many IPG Photonics (IPGP) shares does the insider own after these sales?

Following the reported transactions, the reporting person directly beneficially owned 6,926,099 shares of IPG Photonics common stock.

Were the IPG Photonics (IPGP) insider sales made under a Rule 10b5-1 plan?

Yes. The filing states the sales were effected under a Rule 10b5-1 trading plan adopted by the reporting person on June 13, 2025.

Over what dates did the IPG Photonics (IPGP) insider trades take place?

The reported insider sales took place on November 17, 2025 and November 18, 2025, as shown in the transaction table.

Can investors obtain more detailed pricing information for the IPG Photonics (IPGP) trades?

Yes. The reporting person undertook to provide, upon request to the SEC staff, the issuer, or a security holder, information on the number of shares sold at each separate price within the disclosed ranges.