IPG Photonics (NASDAQ: IPGP) insiders report 34.3% stake for Shcherbakov

Rhea-AI Filing Summary

Amendment No. 7 to Schedule 13D for IPG Photonics Corporation updates beneficial ownership information for several major holders of the company’s common stock. Reported percentages are calculated using 42,443,616 shares of common stock outstanding as of May 4, 2026.

The Valentin Gapontsev Trust I reports beneficial ownership of 6,670,283 shares, or 15.7% of the class. Angelo P. Lopresti reports 8,095,986 shares (19.1%). IQ EQ Trust Company, U.S., LLC reports 8,328,919 shares (19.6%). Eugene A. Shcherbakov reports 14,577,710 shares, representing 34.3% of IPG Photonics’ common stock.

Filing Explained

The amendment clarifies shared versus individual control, but its referenced transaction exhibit is needed to identify the underlying ownership change.

This July 28, 2026 Schedule 13D amendment reports four persons’ ownership positions, including shared voting and dispositive power; its structural effect is to clarify which reported holdings are individual versus jointly controlled.

The filing identifies an ownership event date of February 18, 2026, while calculating the reported percentages using 42,443,616 shares outstanding as of May 4, 2026.

Schedules 13D and 13G disclose ownership above 5%, and amendments track changes in stake or intent as stated; this filing specifically reports beneficial ownership and voting and dispositive powers.

Item 5(c) refers to transactions during the prior 60 days in Exhibit 1, but those transaction entries are not included in the supplied text, so the underlying purchase, sale, transfer, or other change cannot be identified from this disclosure alone.

Key Figures

Shares Outstanding: 42,443,616 shares Valentin Gapontsev Trust I Beneficial Ownership: 6,670,283 shares (15.7%) Angelo P. Lopresti Beneficial Ownership: 8,095,986 shares (19.1%) +2 more

5 metrics

Shares Outstanding 42,443,616 shares Common stock outstanding as of May 4, 2026

Valentin Gapontsev Trust I Beneficial Ownership 6,670,283 shares (15.7%) IPG Photonics common stock beneficially owned

Angelo P. Lopresti Beneficial Ownership 8,095,986 shares (19.1%) IPG Photonics common stock beneficially owned

IQ EQ Trust Company Beneficial Ownership 8,328,919 shares (19.6%) IPG Photonics common stock beneficially owned

Eugene A. Shcherbakov Beneficial Ownership 14,577,710 shares (34.3%) IPG Photonics common stock beneficially owned

Key Terms

beneficially owned, Sole Voting Power, Shared Voting Power, Sole Dispositive Power, +2 more

6 terms

beneficially owned financial

"Aggregate amount beneficially owned by each reporting person 6,670,283.00"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

Sole Voting Power financial

"Number of Shares Beneficially Owned by Each Reporting Person With: 7 | Sole Voting Power 6,670,283.00"

Sole voting power is the exclusive right to cast votes attached to a shareholder’s stock without needing approval from anyone else. Like holding the only remote control for a TV, it lets that holder decide corporate matters such as board members, mergers, and policy changes, making it important to investors because it concentrates control and can strongly influence a company’s strategy and the value of its shares.

Shared Voting Power financial

"Number of Shares Beneficially Owned by Each Reporting Person With: 8 | Shared Voting Power 8,032,281.00"

Shared voting power occurs when two or more parties jointly have the right to vote or decide how a block of company shares is cast, like co-owners who must agree before moving a piece of furniture. Investors care because who controls voting rights affects board elections, major corporate decisions and takeover outcomes, and shared control can alter regulatory disclosures and the practical influence any holder has over a company’s direction and value.

Sole Dispositive Power financial

"Number of Shares Beneficially Owned by Each Reporting Person With: 9 | Sole Dispositive Power 6,670,283.00"

Sole dispositive power is the exclusive legal authority to decide what happens to a security — for example, whether to sell, transfer, or retain shares — without needing anyone else’s permission. Investors care because it signals who truly controls the economic outcome of an investment: like holding the only key to a safe, the holder can realize gains or losses and may trigger regulatory reporting, insider rules, or influence over corporate ownership.

Shared Dispositive Power financial

"Number of Shares Beneficially Owned by Each Reporting Person With: 10 | Shared Dispositive Power 8,032,281.00"

Schedule 13D regulatory

"This Amendment No. 7 ("Amendment No. 7") to amends and supplements the originally filed on Schedule 13D"

A Schedule 13D is a legal document that investors file with regulators when they buy a large enough stake in a company to potentially influence its management or decisions. It provides details about the investor’s intention, ownership stake, and plans, helping other investors understand who is gaining control and what their motives might be.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 07/28/2026 - 04:19 PM Accepted by SEC EDGAR 07/28/2026 - 04:18 PM Learn about SEC filing dates

FAQ

What does Schedule 13D Amendment No. 7 disclose for IPGP?

Schedule 13D Amendment No. 7 updates beneficial ownership of IPG Photonics common stock by key holders, including a 34.3% stake for Eugene A. Shcherbakov. Percentages are based on 42,443,616 shares outstanding as of May 4, 2026.

How many IPGP shares does Eugene A. Shcherbakov beneficially own?

Eugene A. Shcherbakov beneficially owns 14,577,710 shares of IPG Photonics, representing 34.3% of the common stock. This ownership percentage is calculated using 42,443,616 shares of common stock outstanding as of May 4, 2026.

What is the IPGP stake held by the Valentin Gapontsev Trust I?

The Valentin Gapontsev Trust I beneficially owns 6,670,283 shares of IPG Photonics common stock, equal to 15.7% of the class. These figures are based on 42,443,616 shares outstanding as of May 4, 2026.

What are the reported IPGP holdings of Angelo P. Lopresti and IQ EQ Trust Company?

Angelo P. Lopresti reports beneficial ownership of 8,095,986 shares of IPG Photonics, or 19.1% of the class. IQ EQ Trust Company, U.S., LLC reports 8,328,919 shares, representing 19.6% of the company’s outstanding common stock.

What share count is used to calculate ownership percentages in the IPGP Schedule 13D/A?

Ownership percentages in this Schedule 13D Amendment No. 7 are calculated using 42,443,616 shares of IPG Photonics common stock outstanding as of May 4, 2026, as reported in the company’s Form 10-Q filed on May 5, 2026.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934

(Amendment No. 7)

IPG Photonics Corporation

(Name of Issuer)

Common stock, par value $0.0001 per share

(Title of Class of Securities)

44980X109

(CUSIP Number)

Chip Martin, President
c/o IQ EQ Trust Company, U.S., LLC, 3 Executive Park Drive, Suite 302
Bedford, NH, 03110
603-219-0264

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)

02/18/2026

(Date of Event Which Requires Filing of This Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box.

The information required on the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

schemaVersion:

SCHEDULE 13D

CUSIP Number(s): 44980X109

1

Name of reporting person

Valentin Gapontsev Trust I

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

OO

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

NEW HAMPSHIRE

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 6,670,283.00
8	Shared Voting Power 0.00
9	Sole Dispositive Power 6,670,283.00
10	Shared Dispositive Power 0.00

11

Aggregate amount beneficially owned by each reporting person

6,670,283.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

15.7 %

14

Type of Reporting Person (See Instructions)

OO

SCHEDULE 13D

CUSIP Number(s): 44980X109

1

Name of reporting person

Lopresti Angelo P

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

OO

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 63,705.00
8	Shared Voting Power 8,032,281.00
9	Sole Dispositive Power 63,705.00
10	Shared Dispositive Power 8,032,281.00

11

Aggregate amount beneficially owned by each reporting person

8,095,986.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

19.1 %

14

Type of Reporting Person (See Instructions)

IN

SCHEDULE 13D

CUSIP Number(s): 44980X109

1

Name of reporting person

IQ EQ Trust Company, U.S., LLC

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

OO

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

NEW HAMPSHIRE

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 296,638.00
8	Shared Voting Power 8,032,281.00
9	Sole Dispositive Power 296,638.00
10	Shared Dispositive Power 8,032,281.00

11

Aggregate amount beneficially owned by each reporting person

8,328,919.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

19.6 %

14

Type of Reporting Person (See Instructions)

OO

SCHEDULE 13D

CUSIP Number(s): 44980X109

1

Name of reporting person

Shcherbakov Eugene A

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

OO

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

GERMANY

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 6,545,429.00
8	Shared Voting Power 8,032,281.00
9	Sole Dispositive Power 6,545,429.00
10	Shared Dispositive Power 8,032,281.00

11

Aggregate amount beneficially owned by each reporting person

14,577,710.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

34.3 %

14

Type of Reporting Person (See Instructions)

IN

SCHEDULE 13D

Item 1.	Security and Issuer
(a)	Title of Class of Securities: Common stock, par value $0.0001 per share
(b)	Name of Issuer: IPG Photonics Corporation
(c)	Address of Issuer's Principal Executive Offices: 377 Simarano Drive, Marlborough, MASSACHUSETTS , 01752.
Item 1 Comment: Explanatory Note This Amendment No. 7 ("Amendment No. 7") to Schedule 13D amends and supplements the Schedule 13D originally filed by certain of the Reporting Persons on December 21, 2010, as amended on January 24, 2011, May 23, 2011, December 17, 2012, November 1, 2021, January 2, 2024 and February 20, 2025 (as amended, the "Schedule 13D"). Information reported in the Schedule 13D remains in effect except to the extent that it is amended, restated or superseded by information contained in this Amendment No. 7. Capitalized terms used but not defined herein have the same meanings ascribed to them in the Schedule 13D.
Item 5.	Interest in Securities of the Issuer
(a)	Item 5(a) of the Schedule 13D is amended and supplemented as follows: The percentages reported herein are based on 42,443,616 shares of Common Stock outstanding as of May 4, 2026, as reported in the Issuer's Form 10-Q filed on May 5, 2026.
(c)	Item 5(c) of the Schedule 13D is amended and supplemented as follows: The transactions in the Common Stock during the 60 days prior to the date of the event that requires filing of this statement through the date hereof are set forth in Exhibit 1 and incorporated herein by reference.
Item 7.	Material to be Filed as Exhibits.
	Exhibit 1 - Transactions in Securities

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Valentin Gapontsev Trust I

Signature:	/s/ Angelo P. Lopresti, /s/ Eugene Scherbakov, /s/ Christopher C. Martin
Name/Title:	Angelo P. Lopresti, Trustee, Eugene Scherbakov, Trustee, and Christopher C. Martin, President of IQ EQ Trust Company, U.S., LLC
Date:	07/28/2026

Lopresti Angelo P

Signature:	/s/ Angelo P. Lopresti
Name/Title:	Angelo P. Lopresti
Date:	07/28/2026

IQ EQ Trust Company, U.S., LLC

Signature:	/s/ Christopher C. Martin
Name/Title:	Christopher C. Martin, President
Date:	07/28/2026

Shcherbakov Eugene A

Signature:	/s/ Eugene Scherbakov
Name/Title:	Eugene Scherbakov
Date:	07/28/2026