[Form 4] IPG Photonics Corporation Insider Trading Activity

Rhea-AI Filing Summary

Insider transactions at IPG Photonics (IPGP): This Form 4 reports that Dr. Igor Samartsev and his spouse, Natalia Pavlova, adjusted their beneficial ownership through multiple transfers to family trusts in late August and early September 2025. On August 29, 2025 Dr. Samartsev contributed 121,002 shares to "Trust-I May 2017" and 121,951 shares to "Grantor Retained Annuity Trust II September 2025." On September 2–3, 2025 additional transfers moved 122,225 and 24,590 shares among trusts. The filing also reports a disposition of 6,234 shares. The changes reflect reallocation of existing holdings among direct and indirect ownership vehicles, with Ms. Pavlova noted as an indirect beneficiary as spouse.

Positive

• Documented transfers of large share blocks to named trusts (e.g., 121,002 and 121,951 shares on 08/29/2025), which clarifies ownership structure
• No derivative or option exercises reported, indicating the filing reflects stock reallocation rather than compensation exercises

Negative

• Reported disposition of 6,234 shares reduces direct holdings reported on Form 4
• Direct versus indirect ownership changes may complicate quick assessment of voting control until records are reconciled

Insights

Corporate Governance Expert

TL;DR: Significant intra-family transfers to trusts, no open-market sales disclosed, signals ownership restructuring not immediate liquidity event.

The filing documents concentrated transfers of IPGP common stock from Dr. Samartsev into multiple named trusts and grantor retained annuity trusts between August 29 and September 3, 2025, plus a reported disposition of 6,234 shares. These moves are typical of estate or tax planning and alter direct versus indirect beneficial ownership without indicating shares sold on the public market. Investors should note the persistence of family-linked indirect ownership across multiple trust vehicles, which can affect voting and succession dynamics.

Securities/Insider Transactions Analyst

TL;DR: Transfers materially reallocate holdings among trusts; no exercise or option activity reported.

The statement contains only non-derivative share transfers and indirect ownership reclassifications. Reported items include contributions of 121,002 and 121,951 shares on August 29, 2025, a 122,225-share transfer on September 2, 2025, and a 24,590-share contribution on September 3, 2025, plus a 6,234-share disposition. There are no derivative transactions, no prices listed, and no new acquisitions via open-market purchases. Impact is administrative for ownership records rather than an operational or financing event.

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).

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^*

Samartsev Igor

(Last) (First) (Middle)

C/O IPG PHOTONICS CORPORATION

377 SIMARANO DRIVE

(Street)

MARLBOROUGH MA 01752

(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		10% Owner
X	Officer (give title below)		Other (specify below)
	SVP, Chief Scientist

3. Date of Earliest Transaction (Month/Day/Year)
08/29/2025

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

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

	Form filed by One Reporting Person
X	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								6,234(1)(2)	D(3)
Common Stock								113,265	I	By Wife
Common Stock								10,000	I	By Wife's Mother
Common Stock								1,200	I	By Trust 2015
Common Stock								176,400	I	By Trust Sept. 2015
Common Stock								20,983	I	By Trust-G4 2016
Common Stock								20,982	I	By Trust-I 2016
Common Stock								93,752(4)	I	By Trust May 2017
Common Stock								145,592(1)(2)	I	By Trust-I May 2017
Common Stock								90,380	I	By Grantor Retained Annuity Trust II September 2021
Common Stock								28,908	I	By Grantor Retained Annuity Trust November 2022
Common Stock								122,225(4)	I	By Grantor Retained Annuity Trust I September 2025
Common Stock								121,951(1)	I	By Grantor Retained Annuity Trust II September 2025

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

1. Name and Address of Reporting Person^*

Samartsev Igor

(Last) (First) (Middle)

C/O IPG PHOTONICS CORPORATION

377 SIMARANO DRIVE

(Street)

MARLBOROUGH MA 01752

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	SVP, Chief Scientist

1. Name and Address of Reporting Person^*

Pavlova Natalia

(Last) (First) (Middle)

C/O IPG PHOTONICS CORPORATION

377 SIMARANO DRIVE

(Street)

MARLBOROUGH MA 01752

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer

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

Explanation of Responses:

1. On August 29, 2025, Dr. Samartsev contributed 121,002 shares to Trust-I May 2017 and 121,951 shares to Grantor Retained Annuity Trust II September 2025.

2. On September 3, 2025, Dr. Samartsev contributed 24,590 shares to Trust-I May 2017.

3. Ms. Pavlova, a director, is an indirect beneficial owner of such shares as the spouse of Dr. Samartsev, an officer.

4. On September 2, 2025, Trust May 2017 contributed 122,225 shares to Grantor Retained Annuity Trust I September 2025.

Remarks:

	/s/ Adam N. King, Attorney-in-Fact for Natalia Pavlova and Igor Samartsev	09/03/2025
	** 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 did the Form 4 for IPGP filed for Samartsev and Pavlova report?

The filing reports multiple transfers of IPG Photonics common stock to various trusts between 08/29/2025 and 09/03/2025, and a disposition of 6,234 shares.

How many shares did Dr. Igor Samartsev transfer on August 29, 2025?

On 08/29/2025 Dr. Samartsev contributed 121,002 shares to Trust-I May 2017 and 121,951 shares to Grantor Retained Annuity Trust II September 2025.

Were any derivative securities (options, warrants) reported in this Form 4 for IPGP?

No. The filing contains only non-derivative common stock transfers and lists no derivative or option transactions.

Why is Natalia Pavlova listed as an indirect beneficial owner?

The filing states Ms. Pavlova is an indirect beneficial owner as the spouse of Dr. Samartsev, reflecting shared indirect interests in the reported holdings.

Did the Form 4 disclose any sale prices or open-market sales?

No prices or open-market sale details are provided; the filing lists transfers among trusts and a disposition without price information.