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    ACCESSION NUMBER:		0001111928-26-000096
    CONFORMED SUBMISSION TYPE:	DEFA14A
    PUBLIC DOCUMENT COUNT:		12
    FILED AS OF DATE:		20260505
    DATE AS OF CHANGE:		20260505

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			IPG PHOTONICS CORP
    		CENTRAL INDEX KEY:			0001111928
    		STANDARD INDUSTRIAL CLASSIFICATION:	SEMICONDUCTORS & RELATED DEVICES [3674]
    		ORGANIZATION NAME:           	04 Manufacturing
    		EIN:				043444218
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		DEFA14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-33155
    		FILM NUMBER:		26940717

    	BUSINESS ADDRESS:
    		STREET 1:		377 SIMARANO DRIVE
    		CITY:			MARLBOROUGH
    		STATE:			MA
    		ZIP:			01752
    		BUSINESS PHONE:		5083731100

    	MAIL ADDRESS:
    		STREET 1:		377 SIMARANO DRIVE
    		CITY:			MARLBOROUGH
    		STATE:			MA
    		ZIP:			01752
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    <FILENAME>defa14a2026proxy-proxysupp.htm
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    Document 1 - file: defa14a2026proxy-proxysupp.htm

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    <FILENAME>footer_logo.jpg
    <TEXT>
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    <SEQUENCE>3
    <FILENAME>ipgsupplementalproxyipgdra.jpg
    <TEXT>
    Document 3 - file: ipgsupplementalproxyipgdra.jpg

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    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>ipgsupplementalproxyipgdraa.jpg
    <TEXT>
    Document 4 - file: ipgsupplementalproxyipgdraa.jpg

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    <SEQUENCE>5
    <FILENAME>ipgsupplementalproxyipgdrab.jpg
    <TEXT>
    Document 5 - file: ipgsupplementalproxyipgdrab.jpg

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    <TYPE>GRAPHIC
    <SEQUENCE>6
    <FILENAME>ipgsupplementalproxyipgdrac.jpg
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    Document 6 - file: ipgsupplementalproxyipgdrac.jpg

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    <FILENAME>ipgsupplementalproxyipgdrad.jpg
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    Document 7 - file: ipgsupplementalproxyipgdrad.jpg

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    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>ipgsupplementalproxyipgdrae.jpg
    <TEXT>
    Document 8 - file: ipgsupplementalproxyipgdrae.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>9
    <FILENAME>ipgsupplementalproxyipgdraf.jpg
    <TEXT>
    Document 9 - file: ipgsupplementalproxyipgdraf.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>10
    <FILENAME>ipgsupplementalproxyipgdrag.jpg
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    Document 10 - file: ipgsupplementalproxyipgdrag.jpg

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    <SEQUENCE>11
    <FILENAME>ipgsupplementalproxyipgdrah.jpg
    <TEXT>
    Document 11 - file: ipgsupplementalproxyipgdrah.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>12
    <FILENAME>ipgsupplementalproxyipgdrai.jpg
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    Document 12 - file: ipgsupplementalproxyipgdrai.jpg

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