SEC Form 4 reporting owner

Valentin Gapontsev Trust I

Valentin Gapontsev Trust I has filed 41 Form 4 transactions reported between December 15, 2025 and September 2, 2026, as 10% owner of IPG PHOTONICS CORP.

Name as filed: Valentin Gapontsev Trust I

Open-market buys, 24 mo

None

reported

Open-market sales, 24 mo

$26.8M

41 lines

Companies

with Form 4 filings

Latest transaction

Sep 2, 2026

transaction date

Roles and reported holdings

IPGPIPG PHOTONICS CORP
Dec 15, 2025 – Sep 2, 2026
10% owner
Held directly6,642,886 sh as of Sep 2, 2026 · Form 4
24 months: $26.8M sold

Transaction history

All 41 reported transactions, newest first. Every row links to the Form 4 on SEC EDGAR.

Date	Company	Type	Shares	Price	Value	Owned after	Filing
Sep 2, 2026	IPGP10% owner	Open-market saleCode S · direct	4,715	$76.25	$360K@ $76.25	6,642,886	Form 4
Sep 2, 2026	IPGP10% owner	Open-market saleCode S · direct	4,591	$75.65	$347K@ $75.65	6,647,601	Form 4
Sep 1, 2026	IPGP10% owner	Open-market saleCode S · direct	18,091	$75.14	$1.4M@ $75.14	6,652,192	Form 4
Jul 21, 2026	IPGP10% owner	Open-market saleCode S · direct	23,869	$103.00	$2.5M@ $103.00	6,670,283	Form 4
Jul 21, 2026	IPGP10% owner	Open-market saleCode S · direct	24,347	$102.04	$2.5M@ $102.04	6,694,152	Form 4
Jul 21, 2026	IPGP10% owner	Open-market saleCode S · direct	7,100	$101.20	$719K@ $101.20	6,718,499	Form 4
Jul 21, 2026	IPGP10% owner	Open-market saleCode S · direct	1,000	$100.08	$100K@ $100.08	6,725,599	Form 4
Feb 17, 2026	IPGP10% owner	Open-market saleCode S · direct	390	$149.88	$58K@ $149.88	6,726,599	Form 4
Feb 17, 2026	IPGP10% owner	Open-market saleCode S · direct	220	$148.00	$33K@ $148.00	6,726,989	Form 4
Feb 17, 2026	IPGP10% owner	Open-market saleCode S · direct	410	$146.21	$60K@ $146.21	6,727,209	Form 4
Feb 17, 2026	IPGP10% owner	Open-market saleCode S · direct	480	$144.29	$69K@ $144.29	6,727,619	Form 4
Feb 17, 2026	IPGP10% owner	Open-market saleCode S · direct	137	$143.71	$20K@ $143.71	6,728,099	Form 4
Feb 17, 2026	IPGP10% owner	Open-market saleCode S · direct	376	$141.97	$53K@ $141.97	6,728,236	Form 4
Feb 17, 2026	IPGP10% owner	Open-market saleCode S · direct	100	$140.58	$14K@ $140.58	6,728,612	Form 4
Feb 17, 2026	IPGP10% owner	Open-market saleCode S · direct	760	$138.82	$106K@ $138.82	6,728,712	Form 4
Feb 17, 2026	IPGP10% owner	Open-market saleCode S · direct	790	$137.79	$109K@ $137.79	6,729,472	Form 4
Feb 17, 2026	IPGP10% owner	Open-market saleCode S · direct	1,393	$136.89	$191K@ $136.89	6,730,262	Form 4
Feb 17, 2026	IPGP10% owner	Open-market saleCode S · direct	1,381	$135.93	$188K@ $135.93	6,731,655	Form 4
Feb 17, 2026	IPGP10% owner	Open-market saleCode S · direct	125	$134.12	$17K@ $134.12	6,733,036	Form 4
Feb 17, 2026	IPGP10% owner	Open-market saleCode S · direct	4,035	$133.42	$538K@ $133.42	6,733,161	Form 4
Feb 17, 2026	IPGP10% owner	Open-market saleCode S · direct	15,882	$132.40	$2.1M@ $132.40	6,737,196	Form 4
Feb 17, 2026	IPGP10% owner	Open-market saleCode S · direct	8,383	$131.67	$1.1M@ $131.67	6,753,078	Form 4
Feb 17, 2026	IPGP10% owner	Open-market saleCode S · direct	4,931	$130.57	$644K@ $130.57	6,761,461	Form 4
Feb 17, 2026	IPGP10% owner	Open-market saleCode S · direct	3,931	$129.56	$509K@ $129.56	6,766,392	Form 4
Feb 17, 2026	IPGP10% owner	Open-market saleCode S · direct	5,012	$128.33	$643K@ $128.33	6,770,323	Form 4
Feb 17, 2026	IPGP10% owner	Open-market saleCode S · direct	4,354	$127.42	$555K@ $127.42	6,775,335	Form 4
Feb 17, 2026	IPGP10% owner	Open-market saleCode S · direct	6,820	$126.33	$862K@ $126.33	6,779,689	Form 4
Feb 17, 2026	IPGP10% owner	Open-market saleCode S · direct	6,590	$125.40	$826K@ $125.40	6,786,509	Form 4
Jan 15, 2026	IPGP10% owner	Open-market saleCode S · direct	7,381	$80.16	$592K@ $80.16	6,793,099	Form 4
Jan 15, 2026	IPGP10% owner	Open-market saleCode S · direct	571	$79.38	$45K@ $79.38	6,800,480	Form 4
Jan 14, 2026	IPGP10% owner	Open-market saleCode S · direct	700	$78.55	$55K@ $78.55	6,801,051	Form 4
Jan 14, 2026	IPGP10% owner	Open-market saleCode S · direct	13,159	$77.63	$1.0M@ $77.63	6,801,751	Form 4
Jan 14, 2026	IPGP10% owner	Open-market saleCode S · direct	3,667	$77.19	$283K@ $77.19	6,814,910	Form 4
Jan 13, 2026	IPGP10% owner	Open-market saleCode S · direct	6,277	$77.70	$488K@ $77.70	6,818,577	Form 4
Jan 13, 2026	IPGP10% owner	Open-market saleCode S · direct	16,752	$76.71	$1.3M@ $76.71	6,824,854	Form 4
Jan 12, 2026	IPGP10% owner	Open-market saleCode S · direct	1,928	$76.69	$148K@ $76.69	6,841,606	Form 4
Jan 12, 2026	IPGP10% owner	Open-market saleCode S · direct	16,065	$76.20	$1.2M@ $76.20	6,843,534	Form 4
Dec 16, 2025	IPGP10% owner	Open-market saleCode S · direct	1,412	$78.22	$110K@ $78.22	6,859,599	Form 4
Dec 16, 2025	IPGP10% owner	Open-market saleCode S · direct	12,160	$77.44	$942K@ $77.44	6,861,011	Form 4
Dec 16, 2025	IPGP10% owner	Open-market saleCode S · direct	13,544	$76.59	$1.0M@ $76.59	6,873,171	Form 4
Dec 15, 2025	IPGP10% owner	Open-market saleCode S · direct	39,384	$77.63	$3.1M@ $77.63	6,886,715	Form 4

How this page is built

Every row comes from a Form 4 filed with the SEC, which officers, directors and holders of more than 10% of a company’s stock must file within two business days of a trade. Transactions are grouped by the reporting owner’s name as filed (spacing, capitals and punctuation ignored); two different people filing under an identical name would appear together, and one person filing under two spellings appears on two pages.

Open-market totals count code P purchases and code S sales over the last 24 months. The same trade reported on more than one filing is counted once; when another owner (for example a fund and its general partner) reports the identical trade, they are listed beside it. Holdings are the shares owned after the latest purchase, sale, gift or tax-withholding line, shown separately for direct and indirect ownership; an indirect figure is one holding line, not a total across every trust or entity.

This page describes what was filed with the SEC; it is not investment advice or a recommendation to buy or sell any security.