IPG Photonics major holder reports 15.2% stake

Rhea-AI Filing Summary

IPG Photonics Corporation has a significant shareholder disclosure from IP Fibre Devices (UK) Ltd, which filed an amended Schedule 13G. The reporting person, organized under the laws of the United Kingdom, reports beneficial ownership of 6,463,302 shares of IPG Photonics common stock, par value $0.0001 per share.

This holding represents 15.2% of the outstanding common stock. IP Fibre Devices (UK) Ltd reports sole voting power and sole dispositive power over all 6,463,302 shares, with no shared voting or dispositive power. The filing is signed by Dr. Eugene A. Scherbakov as Managing Director of the reporting person.

Key Figures

Beneficially owned shares: 6,463,302 shares Percent of class: 15.2% Sole voting power: 6,463,302 shares +3 more

6 metrics

Beneficially owned shares 6,463,302 shares Common stock beneficially owned by IP Fibre Devices (UK) Ltd

Percent of class 15.2% Percentage of IPG Photonics common stock class held by the reporting person

Sole voting power 6,463,302 shares Shares over which the reporting person has sole power to vote

Shared voting power 0 shares Shares over which the reporting person has shared power to vote

Sole dispositive power 6,463,302 shares Shares over which the reporting person has sole power to dispose

Shared dispositive power 0 shares Shares over which the reporting person has shared power to dispose

Key Terms

Schedule 13G/A, beneficially owned, sole voting power, sole dispositive power

4 terms

Schedule 13G/A regulatory

"This /A is being filed by IP Fibre Devices (UK) Ltd."

A Schedule 13G/A is an amended public filing with the U.S. securities regulator that updates a previous Schedule 13G, disclosing when an individual or group holds a substantial (typically over 5%) stake in a company and is claiming a passive, non‑controlling intent. Investors monitor these updates because rising or falling holdings can signal changing confidence, potential future moves, or shifts in voting power — like watching a public ledger where large shareholders quietly adjust their positions.

beneficially owned financial

"Amount beneficially owned: 6,463,302 shares of Common Stock"

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

"Sole voting power 6,463,302.00"

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.

sole dispositive power financial

"Sole Dispositive Power 6,463,302.00"

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.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many IPG Photonics (IPGP) shares does IP Fibre Devices (UK) Ltd report owning?

IP Fibre Devices (UK) Ltd reports beneficial ownership of 6,463,302 shares of IPG Photonics common stock. This figure reflects all shares over which it has sole voting and dispositive power under the Schedule 13G/A filing.

What percentage of IPG Photonics (IPGP) does IP Fibre Devices (UK) Ltd hold?

IP Fibre Devices (UK) Ltd reports holding 15.2% of IPG Photonics’ outstanding common stock. This percentage corresponds to its beneficial ownership of 6,463,302 shares as disclosed in the Schedule 13G/A amendment.

Does IP Fibre Devices (UK) Ltd share voting power over IPG Photonics (IPGP) shares?

No. The filing states sole voting power over 6,463,302 shares and shared voting power of 0. It likewise reports sole dispositive power over the same shares and no shared dispositive power.

Where is the reporting person in the IPG Photonics (IPGP) Schedule 13G/A organized?

IP Fibre Devices (UK) Ltd, the reporting person, is organized under the laws of the United Kingdom. Its principal business office is listed as c/o IPG Photonics Corporation, 377 Simarano Drive, Marlborough, MA 01752.

Who signed the Schedule 13G/A for IPG Photonics (IPGP) on behalf of IP Fibre Devices (UK) Ltd?

The amendment is signed by Dr. Eugene A. Scherbakov, identified as Managing Director of IP Fibre Devices (UK) Ltd. His signature certifies the reported ownership and powers related to IPG Photonics common stock.

What class of securities of IPG Photonics (IPGP) is covered in this Schedule 13G/A?

The filing covers IPG Photonics’ common stock, par value $0.0001 per share. The CUSIP number for this class is listed as 44980X109, which uniquely identifies these securities in the market.

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

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

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 2)

IPG Photonics Corporation

(Name of Issuer)

Common stock, par value $0.0001 per share

(Title of Class of Securities)

44980X109

(CUSIP Number)

09/22/2025

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 44980X109

1

Names of Reporting Persons

IP Fibre Devices LTD

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

UNITED KINGDOM

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 6,463,302.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 6,463,302.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

6,463,302.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

15.2 %

12

Type of Reporting Person (See Instructions)

CO

SCHEDULE 13G

Item 1.
(a)	Name of issuer: IPG Photonics Corporation
(b)	Address of issuer's principal executive offices: 377 Simarano Drive, Marlborough, Massachusetts, 01752
Item 2.
(a)	Name of person filing: This Schedule 13G/A is being filed by IP Fibre Devices (UK) Ltd. (the "Reporting Person").
(b)	Address or principal business office or, if none, residence: The principal business office of the Reporting Person is c/o IPG Photonics Corporation, 377 Simarano Drive, Marlborough, MA 01752.
(c)	Citizenship: The Reporting Person is organized under the laws of the United Kingdom.
(d)	Title of class of securities: Common stock, par value $0.0001 per share
(e)	CUSIP No.: 44980X109
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 6,463,302 shares of Common Stock
(b)	Percent of class: 15.2 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 6463302
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 6463302
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10. Certifications:

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.

IP Fibre Devices LTD

Signature:	/s/ Eugene Scherbakov
Name/Title:	Dr. Eugene A. Scherbakov, Managing Director
Date:	07/28/2026