Valentin Gapontsev Trust I - 18 Feb 2026 SCHEDULE 13D/A Report for IPG Photonics Corporation Common stock, par value $0.0001 per share (IPGP)

Filing manager: Valentin Gapontsev Trust I
Reporting owner: Shcherbakov Eugene A
Security: IPG Photonics Corporation Common stock, par value $0.0001 per share
Beneficially owned shares: 14,577,710 shares
Large-stake signal: Form
SCHEDULE 13D/A
Active or control-oriented beneficial ownership filing.
Ownership
34%
Beneficial ownership of this reported class.
Shares
14,577,710 shares
Shares beneficially owned as disclosed.
Event date
18 Feb 2026
Date tied to the ownership event or amendment.
Accepted by SEC
28 Jul 2026
EDGAR acceptance date.
How to read this large-stake filing
Schedule 13D/G filings focus on beneficial ownership stakes, not a full portfolio.
Compare this filing with the holder history and issuer page before treating the percentage as a current position.
Use amendments to understand whether the disclosed stake increased, decreased, or changed reporting status.
Class ownership: 34%
Symbol: IPGP
Shares outstanding: 42,500,612 shares
SEC form: SCHEDULE 13D/A
Accepted by SEC: 28 Jul 2026, 16:18:52 UTC
Event date: 18 Feb 2026
Prior SEC filing: 20 Feb 2025
Source filing: View source filing

Key filing fact

Valentin Gapontsev Trust I disclosed 34% ownership in IPG Photonics Corporation Common stock, par value $0.0001 per share (IPGP) on 18 Feb 2026.

Key facts

Valentin Gapontsev Trust I filed SCHEDULE 13D/A for IPG Photonics Corporation Common stock, par value $0.0001 per share (IPGP).
Disclosed ownership: 34%.
Date of event: 18 Feb 2026.

This page turns one Schedule 13D/G filing into a quick large-stake read before the raw reporting-person rows.
Use the linked SEC filing as the source of truth for ownership percentages, shares, and reporting-party details.

Backed by Schedule 13D/13G

Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.

Reporting persons

Names, ownership percentages, voting power, signatures, titles, and CIKs as disclosed in this Schedule 13D/G filing.

Name	Ownership	Shares owned	Sole voting power	Shared voting power	Signature	Title	CIK
Valentin Gapontsev Trust I	16%	6,670,283	6,670,283	0	/s/ Angelo P. Lopresti, /s/ Eugene Scherbakov, /s/ Christopher C. Martin	Angelo P. Lopresti, Trustee, Eugene Scherbakov, Trustee, and Christopher C. Martin, President of IQ EQ Trust Company, U.S., LLC	0001508155
Lopresti Angelo P	19%	8,095,986	63,705	8,032,281	/s/ Angelo P. Lopresti	Angelo P. Lopresti	0001378548
IQ EQ Trust Company, U.S., LLC	20%	8,328,919	296,638	8,032,281	/s/ Christopher C. Martin	Christopher C. Martin, President
Shcherbakov Eugene A	34%	14,577,710	6,545,429	8,032,281	/s/ Eugene Scherbakov	Eugene Scherbakov	0001378544

CIK / CUSIP context first

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