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<DIV align="center" style="font-size: 10pt; margin-top: 18pt">As filed with the Securities and Exchange Commission on November&nbsp;8, 2011
</DIV>


<DIV style="width: 100%; border-bottom: 2pt solid black; font-size: 1pt">&nbsp;</DIV>
<DIV style="width: 100%; border-bottom: 1pt solid black; font-size: 1pt">&nbsp;</DIV>




<DIV align="center" style="font-size: 14pt; margin-top: 12pt"><B>UNITED STATES<BR>
SECURITIES AND EXCHANGE COMMISSION</B>
</DIV>

<DIV align="center" style="font-size: 12pt"><B>Washington, D.C. 20549</B>
</DIV>

<DIV align="center" style="font-size: 12pt"><B><DIV align="center"><DIV style="FONT-size: 3pt; margin-top: 16pt; width: 26%; border-top: 1px solid #000000">&nbsp;</DIV></DIV></B>
</DIV>

<DIV align="center" style="font-size: 18pt; margin-top: 12pt"><B>FORM S-8</B>
</DIV>


<DIV align="center" style="font-size: 12pt; margin-top: 12pt"><B>REGISTRATION STATEMENT<BR>
UNDER<BR>
THE SECURITIES ACT OF 1933<BR>
<BR>
<DIV align="center"><DIV style="FONT-size: 3pt; margin-top: 16pt; width: 26%; border-top: 1px solid #000000">&nbsp;</DIV></DIV></B>
</DIV>

<DIV align="center" style="font-size: 24pt; margin-top: 12pt"><B>IPG PHOTONICS CORPORATION</B>
</DIV>

<DIV align="center" style="font-size: 10pt">(Exact Name of registrant as specified in its charter)

<DIV align="center"><DIV style="FONT-size: 3pt; margin-top: 16pt; width: 26%; border-top: 1px solid #000000">&nbsp;</DIV></DIV></DIV>


<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="31%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="31%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="31%">&nbsp;</TD>
</TR>
<TR></TR>
<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD align="center" valign="top"><B>Delaware</B>
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top"><B>3674</B>
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top"><B>04-3444218</B></TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top">(State or other jurisdiction of
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">(Primary Standard Industrial
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">(I.R.S. Employer Identification Number)</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top">incorporation or organization)
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Classification Code Number)</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><DIV align="center"><DIV style="FONT-size: 3pt; margin-top: 16pt; width: 26%; border-top: 1px solid #000000">&nbsp;</DIV></DIV></DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><B>IPG Photonics Corporation 2006 Incentive Compensation Plan<BR>
</B>
(Full title of the plan)<BR>
<DIV align="center"><DIV style="FONT-size: 3pt; margin-top: 16pt; width: 26%; border-top: 1px solid #000000">&nbsp;</DIV></DIV></DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><B>50 Old Webster Road<BR>
Oxford, Massachusetts 01540<BR>
(508)&nbsp;373-1100</B><BR>
(Address, including zip code, and telephone number, including area code, of registrant&#146;s principal executive offices)</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><B>Angelo
P. Lopresti, Esq.<BR>
Vice President, General Counsel &#038; Secretary<BR>
IPG Photonics Corporation<BR>
50 Old Webster Road<BR>
Oxford, Massachusetts 01540<BR>
(508)&nbsp;373-1100</B><BR>
(Name, address, including zip code, and telephone number, including area code, of agent for service)<BR>
<BR>
<DIV align="center"><DIV style="FONT-size: 3pt; margin-top: 16pt; width: 26%; border-top: 1px solid #000000">&nbsp;</DIV></DIV></DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><B><I>Copy To:</I></B></DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><B>Robert W. Ericson, Esq.<BR>
David A. Sakowitz, Esq.<BR>
Winston &#038; Strawn LLP<BR>
200 Park Avenue<BR>
New York, New York 10166-4193<BR>
(212)&nbsp;294-6700</B></DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a
non-accelerated filer, or a smaller reporting company. See the definitions of &#147;large accelerated
filer,&#148; &#147;accelerated filer&#148; and &#147;smaller
reporting company&#148; in Rule&nbsp;12b-2 of the Exchange Act.

</DIV>

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="22%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="23%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="23%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="23%">&nbsp;</TD>
</TR>
<TR></TR>
<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">

<TD valign="top"><DIV style="margin-left:0px; text-indent:-0px"><FONT style="white-space: nowrap">Large
accelerated filer <FONT style="font-family: Wingdings">&#111;</FONT></FONT>
</DIV></TD>
    <TD>&nbsp;</TD>

<TD align="center" valign="top"><FONT style="white-space: nowrap">Accelerated
filer <FONT style="font-family: Wingdings">&#254;</FONT></FONT>
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Non-accelerated filer <FONT style="font-family: Wingdings">&#111;</FONT>
</TD>
    <TD>&nbsp;</TD>
    <TD align="right" valign="top"><FONT style="white-space: nowrap">Smaller reporting company <FONT style="font-family: Wingdings">&#111;</FONT></FONT></TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top"><FONT style="white-space: nowrap">(Do not check if a smaller reporting company)</FONT></TD>
    <TD>&nbsp;</TD>
    <TD align="right" valign="top">&nbsp;</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>CALCULATION OF REGISTRATION FEE</B>
</DIV>

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="1%">&nbsp;</TD>
    <TD width="54%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD><!-- VRule -->
    <TD width="2%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD><!-- VRule -->
    <TD width="2%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD><!-- VRule -->
    <TD width="2%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD><!-- VRule -->
    <TD width="2%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>

    <TD width="1%">&nbsp;</TD>
</TR><TR style="font-size: 1px" valign="bottom">
    <TD nowrap align="left" colspan="23" style="border-bottom: 3px double #000000">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">    <TD width="1%">&nbsp;</TD>

    <TD>&nbsp;</TD>
    <TD style="border-right: 1px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD style="border-right: 1px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD style="border-right: 1px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">Proposed</TD>
    <TD style="border-right: 1px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">    <TD width="1%">&nbsp;</TD>

    <TD>&nbsp;</TD>
    <TD style="border-right: 1px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD style="border-right: 1px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD style="border-right: 1px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">Maximum</TD>
    <TD style="border-right: 1px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">    <TD width="1%">&nbsp;</TD>

    <TD nowrap align="center">Title of Each Class of</TD>
    <TD style="border-right: 1px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">Amount</TD>
    <TD style="border-right: 1px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">Proposed Maximum</TD>
    <TD style="border-right: 1px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">Aggregate</TD>
    <TD style="border-right: 1px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">Amount of</TD>
    <TD width="1%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">    <TD width="1%">&nbsp;</TD>

    <TD nowrap align="center">Securities To</TD>
    <TD style="border-right: 1px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">To Be</TD>
    <TD style="border-right: 1px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">Offering Price</TD>
    <TD style="border-right: 1px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">Offering</TD>
    <TD style="border-right: 1px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">Registration</TD>
    <TD width="1%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">    <TD width="1%">&nbsp;</TD>

    <TD nowrap align="center">Be Registered</TD>
    <TD style="border-right: 1px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">Registered (1)</TD>
    <TD style="border-right: 1px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">Per Share (2)</TD>
    <TD style="border-right: 1px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">Price (2)</TD>
    <TD style="border-right: 1px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">Fee</TD>
    <TD width="1%">&nbsp;</TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD width="1%" style="border-top: 1px solid #000000">&nbsp;</TD>
                    <TD style="border-top: 1px solid #000000"><DIV style="margin-left:15px; text-indent:-15px">COMMON STOCK, $0.0001 PAR VALUE PER
SHARE, ISSUABLE PURSUANT TO:</DIV></TD>
    <TD style="border-right: 1px solid #000000; border-top: 1px solid #000000">&nbsp;</TD>
    <TD style="border-top: 1px solid #000000">&nbsp;</TD>
    <TD align="right" valign="top" style="border-top: 1px solid #000000">&nbsp;</TD>
    <TD align="right" valign="top" style="border-top: 1px solid #000000">&nbsp;</TD>
    <TD valign="top" style="border-top: 1px solid #000000">&nbsp;</TD>
    <TD style="border-right: 1px solid #000000; border-top: 1px solid #000000">&nbsp;</TD>
    <TD style="border-top: 1px solid #000000">&nbsp;</TD>
    <TD align="right" valign="top" style="border-top: 1px solid #000000">&nbsp;</TD>
    <TD align="right" valign="top" style="border-top: 1px solid #000000">&nbsp;</TD>
    <TD valign="top" style="border-top: 1px solid #000000">&nbsp;</TD>
    <TD style="border-right: 1px solid #000000; border-top: 1px solid #000000">&nbsp;</TD>
    <TD style="border-top: 1px solid #000000">&nbsp;</TD>
    <TD align="right" valign="top" style="border-top: 1px solid #000000">&nbsp;</TD>
    <TD align="right" valign="top" style="border-top: 1px solid #000000">&nbsp;</TD>
    <TD valign="top" style="border-top: 1px solid #000000">&nbsp;</TD>
    <TD style="border-right: 1px solid #000000; border-top: 1px solid #000000">&nbsp;</TD>
    <TD style="border-top: 1px solid #000000">&nbsp;</TD>
    <TD align="right" valign="top" style="border-top: 1px solid #000000">&nbsp;</TD>
    <TD align="right" valign="top" style="border-top: 1px solid #000000">&nbsp;</TD>
    <TD valign="top" style="border-top: 1px solid #000000">&nbsp;</TD>
    <TD width="1%" style="border-top: 1px solid #000000">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD width="1%" style="border-top: 1px solid #000000">&nbsp;</TD>
    <TD style="border-top: 1px solid #000000"><DIV style="margin-left:30px; text-indent:-15px">IPG Photonics Corporation 2006
Incentive Compensation Plan</DIV></TD>
    <TD style="border-right: 1px solid #000000; border-top: 1px solid #000000">&nbsp;</TD>
    <TD style="border-top: 1px solid #000000">&nbsp;</TD>
    <TD nowrap colspan="3" valign="top" align="center" style="border-top: 1px solid #000000">6,084,273 shares</TD>
    <TD style="border-right: 1px solid #000000; border-top: 1px solid #000000">&nbsp;</TD>
    <TD style="border-top: 1px solid #000000">&nbsp;</TD>
    <TD align="right" valign="top" style="border-top: 1px solid #000000">$</TD>

<TD align="right" valign="top" style="border-top: 1px solid #000000">49.49</TD>
    <TD valign="top" style="border-top: 1px solid #000000">&nbsp;</TD>
    <TD style="border-right: 1px solid #000000; border-top: 1px solid #000000">&nbsp;</TD>
    <TD style="border-top: 1px solid #000000">&nbsp;</TD>
    <TD align="right" valign="top" style="border-top: 1px solid #000000">$</TD>

<TD align="right" valign="top" style="border-top: 1px solid #000000">301,110,671</TD>
    <TD valign="top" style="border-top: 1px solid #000000">&nbsp;</TD>
    <TD style="border-right: 1px solid #000000; border-top: 1px solid #000000">&nbsp;</TD>
    <TD style="border-top: 1px solid #000000">&nbsp;</TD>
    <TD align="right" valign="top" style="border-top: 1px solid #000000">$</TD>

<TD align="right" valign="top" style="border-top: 1px solid #000000">34,508</TD>
    <TD valign="top" style="border-top: 1px solid #000000">&nbsp;</TD>
    <TD width="1%" style="border-top: 1px solid #000000">&nbsp;</TD>
</TR>
<TR style="font-size: 1px" valign="bottom">
    <TD nowrap align="left" colspan="23" style="border-top: 3px double #000000">&nbsp;</TD>
</TR>

<!-- End Table Body -->
</TABLE>
</DIV>


<DIV align="left">
<DIV style="font-size: 3pt; margin-top: 0pt; width: 18%; border-top: 0px solid #000000">&nbsp;</DIV>
</DIV>

<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">
<TR>
    <TD width="3%"></TD>
    <TD width="1%"></TD>
    <TD width="96%"></TD>
</TR>

<TR valign="top">
    <TD nowrap align="left">(1)</TD>
    <TD>&nbsp;</TD>
    <TD>In accordance with Rule 416(a) under the Securities Act of 1933, as amended, this
Registration Statement shall be deemed to cover any additional shares of the Registrant&#146;s
common stock that become issuable under the IPG Photonics Corporation 2006 Incentive
Compensation Plan as a result of a stock split, stock dividend or similar adjustment of the
outstanding shares of common stock of IPG Photonics Corporation. The amount of shares listed
includes 84,273 shares that were originally available under the IPG Photonics Corporation 2000
Incentive Compensation Plan (the &#147;Prior Plan&#148;) that may be issued under the 2006 Incentive
Compensation Plan.</TD>
</TR>

<TR style="font-size: 3pt"><TD>&nbsp;</TD></TR>

<TR valign="top">
    <TD nowrap align="left">(2)</TD>
    <TD>&nbsp;</TD>
    <TD>Estimated solely for the purpose of determining the registration fee and computed in
accordance with Rule 457(c) and 457(h) of the Securities Act of 1933, as amended. Such
computation is based on the average of the high and low prices as reported on The Nasdaq
Global Market on November&nbsp;3, 2011.</TD>
</TR>

</TABLE>



<DIV style="width: 100%; border-bottom: 1pt solid black; margin-top: 10pt; font-size: 1pt">&nbsp;</DIV>
<DIV style="width: 100%; border-bottom: 2pt solid black; font-size: 1pt">&nbsp;</DIV>





<P align="center" style="font-size: 10pt"><!-- Folio -->&nbsp;<!-- /Folio -->
</DIV>

<!-- PAGEBREAK -->
<P><HR noshade><P>
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">

<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>EXPLANATORY NOTE</B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Pursuant to General Instruction E of Form S-8, this registration statement on Form S-8 is
being filed in order to register an additional 6,000,000 shares (as well as 84,273 shares that were
originally available under the Prior Plan) of the capital stock of IPG Photonics Corporation, a
Delaware corporation (the &#147;Registrant&#148;), par value $0.0001 per share, which are securities of the
same class and relate to the same employee benefit plan, the IPG Photonics Corporation 2006
Incentive Compensation Plan, as amended and restated February&nbsp;23, 2011 (the &#147;Plan&#148;), as those
shares registered by the Registrant&#146;s registration statement on Form S-8 previously filed with the
Commission on December&nbsp;20, 2006 (Registration No.&nbsp;333-136521), which is hereby incorporated by
reference.
</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>PART II</B>
</DIV>


<DIV align="Center" style="font-size: 10pt; margin-top: 6pt"><B>INFORMATION REQUIRED IN THE REGISTRATION STATEMENT</B>
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;3. Incorporation of Documents by Reference.</B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The following documents filed by the Registrant with the Commission are incorporated by
reference in this Registration Statement:
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a)&nbsp;the Registrant&#146;s annual report on Form 10-K for the fiscal year ended December&nbsp;31, 2010
(File No.&nbsp;001-33155);
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b)&nbsp;the
Registrant&#146;s quarterly reports on Form 10-Q for the fiscal quarter ended March&nbsp;31,
2011, June&nbsp;30, 2011 and September&nbsp;30, 2011 (File No.&nbsp;001-33155);
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(c)&nbsp;the Registrant&#146;s current reports on Form 8-K filed with the Securities and Exchange
Commission (the &#147;Commission&#148;) on March&nbsp;2, 2011, March&nbsp;23, 2011, May&nbsp;19, 2011, June&nbsp;1,
2011, August&nbsp;2, 2011 and September&nbsp;19, 2011 (File No. 001-33155); and
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(d)&nbsp;the description of the Registrant&#146;s common stock, par value $0.0001 per share, contained
in its Registration Statement on Form 8-A/A, filed on December&nbsp;7, 2006 pursuant to Section 12(b) of
the Securities Exchange Act of 1934, as amended (the &#147;1934 Act&#148;), including any amendment or report
filed for the purpose of updating such description.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;All documents subsequently filed with the Commission by the Registrant pursuant to Sections
13(a), 13(c), 14 or 15(d) of the 1934 Act prior to the filing of a post-effective amendment, which
indicates that all securities offered herein have been sold or which deregisters all securities
then remaining unsold, shall be deemed to be incorporated by reference herein and to be part hereof
from the respective dates of filing of such documents (other than the portions of such documents,
which by statute, by designation in such document or otherwise (including but not limited to
information disclosed by the Registrant under Items 2.02 or 7.01 of any current report on Form
8-K), are not deemed filed with the SEC or are not regarded to be incorporated herein by
reference). Any statement contained herein or in a document incorporated or deemed to be
incorporated by reference herein shall be deemed to be modified or superseded for purposes hereof
or for purposes of the related prospectus to the extent that a statement contained herein or in any
other subsequently filed document which is also incorporated or deemed to be incorporated herein
modifies or supersedes such statement. Any such statement so modified or superseded shall not be
deemed, except as so modified or superseded, to constitute a part of this Registration Statement.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;8. Exhibits.</B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The following documents are filed as exhibits to this Registration Statement:
</DIV>
<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="7%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="90%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="left"><B>Exhibit</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="left" style="border-bottom: 1px solid #000000"><B>Number</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="left" style="border-bottom: 1px solid #000000"><B>Description of Document</B></TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">4.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Form of Second Amended and Restated Certificate of Incorporation of the
Registrant (incorporated by reference to Exhibit&nbsp;3.2 to Registration
Statement No.&nbsp;333-136521 filed with the Commission on August&nbsp;11, 2006).</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">4.2
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Form of Certificate of Amendment of Certificate of Incorporation of the
Registrant (incorporated by reference to Exhibit&nbsp;3.4 to Registration
Statement No.&nbsp;333-136521 filed with the Commission on November&nbsp;24, 2006).</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>


<P align="center" style="font-size: 10pt"><!-- Folio -->1<!-- /Folio -->
</DIV>

<!-- PAGEBREAK -->
<P><HR noshade><P>
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="7%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="90%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="left"><B>Exhibit</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="left" style="border-bottom: 1px solid #000000"><B>Number</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="left" style="border-bottom: 1px solid #000000"><B>Description of Document</B></TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">4.3
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Amended and Restated By-laws of the Registrant (incorporated by reference
to Exhibit&nbsp;3.4 to Registration Statement No.&nbsp;333-136521 filed with the
Commission on August&nbsp;11, 2006).</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">4.4
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Specimen Stock Certificate (incorporated by reference to Exhibit&nbsp;4.1 to
Registration Statement No.&nbsp;333-136521 filed with the Commission on
November&nbsp;14, 2006).</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">4.5
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">IPG Photonics Corporation 2006 Incentive Compensation Plan, as amended
February&nbsp;23, 2011 (incorporated by reference to Appendix&nbsp;A to the
Registrant&#146;s Definitive Revised Proxy Statement on Schedule&nbsp;14A, File No.
001-33155, filed with the Commission on May&nbsp;12, 2011).</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">5.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Opinion of Winston &#038; Strawn LLP.</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">23.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Consent of Deloitte &#038; Touche LLP.</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">23.2
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Consent of Winston &#038; Strawn LLP (included in opinion filed as Exhibit&nbsp;5.1).</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">24.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Powers of Attorney (included on signature page).</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>


<P align="center" style="font-size: 10pt"><!-- Folio -->2<!-- /Folio -->
</DIV>

<!-- PAGEBREAK -->
<P><HR noshade><P>
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">

<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>SIGNATURES</B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Pursuant to the requirements of the 1933 Act, the Registrant certifies that it has reasonable
grounds to believe that it meets all of the requirements for filing on Form S-8 and has duly caused
this Registration Statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in Oxford, Massachusetts, on November&nbsp;8, 2011.
</DIV>
<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="40%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="40%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="18%">&nbsp;</TD>
</TR>
<TR></TR>
<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD colspan="3" valign="top" align="left"><B>IPG PHOTONICS CORPORATION</B></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">By:<BR>
Name:
</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">/s/ Valentin P. Gapontsev
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Valentin P. Gapontsev
</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Title:
</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Chief Executive Officer and Chairman of the Board</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>POWER OF ATTORNEY</B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>KNOW ALL MEN BY THESE PRESENTS</B>, that each person whose signature appears below constitutes and
appoints Valentin P. Gapontsev as such person&#146;s true and lawful attorney-in-fact and agent, with
full power of substitution and revocation, for such person and in such person&#146;s name, place and
stead, in any and all capacities to sign any and all amendments (including post-effective
amendments) to this Registration Statement, and to file the same with all exhibits thereto, and the
other documents in connection therewith, and any registration statement relating to any offering
made pursuant to this Registration Statement that is to be effective upon filing pursuant to Rule
462(b) under the 1933 Act with the Securities and Exchange Commission, granting unto said
attorney-in-fact and agent full power and authority to do and perform each and every act and things
requisite and necessary to be done, as fully to all intents and purposes as such person might or
could do in person, hereby ratifying and confirming all that said attorney-in-fact and agent, or
his substitute, may lawfully do or cause to be done by virtue hereof.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Pursuant to the requirements of the 1933 Act, the registrant has duly caused this registration
statement to be signed on its behalf by the undersigned, thereunto duly authorized, in Oxford,
Massachusetts, on November 8, 2011.
</DIV>
<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="30%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="30%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="30%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="center" style="border-bottom: 1px solid #000000"><B>Signature Title</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" style="border-bottom: 1px solid #000000"><B>Title</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" style="border-bottom: 1px solid #000000"><B>Date</B></TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom"><!-- Blank Space -->
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top">/s/Valentin P. Gapontsev<BR>
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Valentin P. Gapontsev
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Chief Executive Officer,&nbsp;Chairman <BR>
of the Board and Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">November&nbsp;8, 2011</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top">&nbsp;
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">(Principal Executive Officer)</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top">/s/ Timothy P.V. Mammen<BR>
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Timothy P.V. Mammen
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Chief Financial Officer&nbsp;(Principal <BR>
Financial Officer and
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">November&nbsp;8, 2011</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top">&nbsp;
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Principal Accounting Officer)</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top">/s/Robert A. Blair<BR>
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Robert A. Blair
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Director&nbsp;
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">November&nbsp;8, 2011</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top">/s/ Michael C. Child<BR>
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Michael C. Child
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Director&nbsp;
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">November&nbsp;8, 2011</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top">/s/ Henry E. Gauthier<BR>
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Henry E. Gauthier
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Director&nbsp;
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">November&nbsp;8, 2011</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top">/s/William S. Hurley<BR>
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
William S. Hurley
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Director&nbsp;
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">November&nbsp;8, 2011</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top">/s/Michael R. Kampfe<BR>
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Michael R. Kampfe
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Director&nbsp;
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">November&nbsp;8, 2011</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>


<P align="center" style="font-size: 10pt"><!-- Folio -->3<!-- /Folio -->
</DIV>

<!-- PAGEBREAK -->
<P><HR noshade><P>
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="30%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="30%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="30%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="center" style="border-bottom: 1px solid #000000"><B>Signature Title</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" style="border-bottom: 1px solid #000000"><B>Title</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" style="border-bottom: 1px solid #000000"><B>Date</B></TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom"><!-- Blank Space -->
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top">/s/William F. Krupke<BR>
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
William F. Krupke
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Director&nbsp;
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">November&nbsp;8, 2011</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top">/s/Eugene Scherbakov<BR>
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Eugene Scherbakov
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Director&nbsp;
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">November&nbsp;8, 2011</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top">/s/Igor Samartsev<BR>
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Igor Samartsev
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Director&nbsp;
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">November&nbsp;8, 2011</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>



<P align="center" style="font-size: 10pt"><!-- Folio -->4<!-- /Folio -->
</DIV>

<!-- PAGEBREAK -->
<P><HR noshade><P>
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">


<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>EXHIBIT INDEX</B>
</DIV>

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="7%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="100%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="left"><B>Exhibit</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="left" style="border-bottom: 1px solid #000000"><B>Number</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="left" style="border-bottom: 1px solid #000000"><B>Description of Document</B></TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">4.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Form of Second Amended and Restated Certificate of Incorporation of the
Registrant (incorporated by reference to Exhibit&nbsp;3.2 to Registration
Statement No.&nbsp;333-136521 filed with the Commission on August&nbsp;11, 2006).</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">4.2
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Form of Certificate of Amendment of Certificate of Incorporation of the
Registrant (incorporated by reference to Exhibit&nbsp;3.4 to Registration
Statement No.&nbsp;333-136521 filed with the Commission on November&nbsp;24, 2006).</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">4.3
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Amended and Restated By-laws of the Registrant (incorporated by reference
to Exhibit&nbsp;3.4 to Registration Statement No.&nbsp;333-136521 filed with the
Commission on August&nbsp;11, 2006).</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">4.4
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Specimen Stock Certificate (incorporated by reference to Exhibit&nbsp;4.1 to
Registration Statement No.&nbsp;333-136521 filed with the Commission on
November&nbsp;14, 2006).</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">4.5
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">IPG Photonics Corporation 2006 Incentive Compensation Plan, as amended
February&nbsp;23, 2011 (incorporated by reference to Appendix&nbsp;A to the
Registrant&#146;s Definitive Revised Proxy Statement on Schedule&nbsp;14A, File No.
001-33155, filed with the Commission on May&nbsp;12, 2011).</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">5.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Opinion of Winston &#038; Strawn LLP.</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">23.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Consent of Deloitte &#038; Touche LLP.</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">23.2
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Consent of Winston &#038; Strawn LLP (included in opinion filed as Exhibit&nbsp;5.1).</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">24.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Powers of Attorney (included on signature page).</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>


<P align="center" style="font-size: 10pt"><!-- Folio -->5<!-- /Folio -->
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[{"type": "S-8", "sequence": "1", "filename": "b88834sv8.htm", "description": "FORM S-8", "secsgml_size_bytes": 45672}]
{"company-data": {"conformed-name": "IPG PHOTONICS CORP", "cik": "0001111928", "assigned-sic": "3674", "irs-number": "043444218", "state-of-incorporation": "DE"}, "filing-values": {"form-type": "S-8", "act": "33", "file-number": "333-177818", "film-number": "111187862"}, "business-address": {"street1": "50 OLD WEBSTER ROAD", "city": "OXFORD", "state": "MA", "zip": "01540", "phone": "5083731100"}, "mail-address": {"street1": "50 OLD WEBSTER ROAD", "city": "OXFORD", "state": "MA", "zip": "01540"}}
sv8
As filed with the Securities and Exchange Commission on November 8, 2011
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM S-8
REGISTRATION STATEMENT
UNDER
THE SECURITIES ACT OF 1933
IPG PHOTONICS CORPORATION
(Exact Name of registrant as specified in its charter)
Delaware
3674
04-3444218
(State or other jurisdiction of
(Primary Standard Industrial
(I.R.S. Employer Identification Number)
incorporation or organization)
Classification Code Number)
IPG Photonics Corporation 2006 Incentive Compensation Plan
(Full title of the plan)
50 Old Webster Road
Oxford, Massachusetts 01540
(508) 373-1100
(Address, including zip code, and telephone number, including area code, of registrant's principal executive offices)
Angelo
P. Lopresti, Esq.
Vice President, General Counsel & Secretary
IPG Photonics Corporation
50 Old Webster Road
Oxford, Massachusetts 01540
(508) 373-1100
(Name, address, including zip code, and telephone number, including area code, of agent for service)
Copy To:
Robert W. Ericson, Esq.
David A. Sakowitz, Esq.
Winston & Strawn LLP
200 Park Avenue
New York, New York 10166-4193
(212) 294-6700
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a
non-accelerated filer, or a smaller reporting company. See the definitions of "large accelerated
filer," "accelerated filer" and "smaller
reporting company" in Rule 12b-2 of the Exchange Act.
Large
accelerated filer
o
Accelerated
filer
þ
Non-accelerated filer
o
Smaller reporting company
o
(Do not check if a smaller reporting company)
CALCULATION OF REGISTRATION FEE
Proposed
Maximum
Title of Each Class of
Amount
Proposed Maximum
Aggregate
Amount of
Securities To
To Be
Offering Price
Offering
Registration
Be Registered
Registered (1)
Per Share (2)
Price (2)
Fee
COMMON STOCK, $0.0001 PAR VALUE PER
SHARE, ISSUABLE PURSUANT TO:
IPG Photonics Corporation 2006
Incentive Compensation Plan
6,084,273 shares
$
49.49
$
301,110,671
$
34,508
(1)
In accordance with Rule 416(a) under the Securities Act of 1933, as amended, this
Registration Statement shall be deemed to cover any additional shares of the Registrant's
common stock that become issuable under the IPG Photonics Corporation 2006 Incentive
Compensation Plan as a result of a stock split, stock dividend or similar adjustment of the
outstanding shares of common stock of IPG Photonics Corporation. The amount of shares listed
includes 84,273 shares that were originally available under the IPG Photonics Corporation 2000
Incentive Compensation Plan (the "Prior Plan") that may be issued under the 2006 Incentive
Compensation Plan.
(2)
Estimated solely for the purpose of determining the registration fee and computed in
accordance with Rule 457(c) and 457(h) of the Securities Act of 1933, as amended. Such
computation is based on the average of the high and low prices as reported on The Nasdaq
Global Market on November 3, 2011.
EXPLANATORY NOTE
Pursuant to General Instruction E of Form S-8, this registration statement on Form S-8 is
being filed in order to register an additional 6,000,000 shares (as well as 84,273 shares that were
originally available under the Prior Plan) of the capital stock of IPG Photonics Corporation, a
Delaware corporation (the "Registrant"), par value $0.0001 per share, which are securities of the
same class and relate to the same employee benefit plan, the IPG Photonics Corporation 2006
Incentive Compensation Plan, as amended and restated February 23, 2011 (the "Plan"), as those
shares registered by the Registrant's registration statement on Form S-8 previously filed with the
Commission on December 20, 2006 (Registration No. 333-136521), which is hereby incorporated by
reference.
PART II
INFORMATION REQUIRED IN THE REGISTRATION STATEMENT
Item 3. Incorporation of Documents by Reference.
The following documents filed by the Registrant with the Commission are incorporated by
reference in this Registration Statement:
(a) the Registrant's annual report on Form 10-K for the fiscal year ended December 31, 2010
(File No. 001-33155);
(b) the
Registrant's quarterly reports on Form 10-Q for the fiscal quarter ended March 31,
2011, June 30, 2011 and September 30, 2011 (File No. 001-33155);
(c) the Registrant's current reports on Form 8-K filed with the Securities and Exchange
Commission (the "Commission") on March 2, 2011, March 23, 2011, May 19, 2011, June 1,
2011, August 2, 2011 and September 19, 2011 (File No. 001-33155); and
(d) the description of the Registrant's common stock, par value $0.0001 per share, contained
in its Registration Statement on Form 8-A/A, filed on December 7, 2006 pursuant to Section 12(b) of
the Securities Exchange Act of 1934, as amended (the "1934 Act"), including any amendment or report
filed for the purpose of updating such description.
All documents subsequently filed with the Commission by the Registrant pursuant to Sections
13(a), 13(c), 14 or 15(d) of the 1934 Act prior to the filing of a post-effective amendment, which
indicates that all securities offered herein have been sold or which deregisters all securities
then remaining unsold, shall be deemed to be incorporated by reference herein and to be part hereof
from the respective dates of filing of such documents (other than the portions of such documents,
which by statute, by designation in such document or otherwise (including but not limited to
information disclosed by the Registrant under Items 2.02 or 7.01 of any current report on Form
8-K), are not deemed filed with the SEC or are not regarded to be incorporated herein by
reference). Any statement contained herein or in a document incorporated or deemed to be
incorporated by reference herein shall be deemed to be modified or superseded for purposes hereof
or for purposes of the related prospectus to the extent that a statement contained herein or in any
other subsequently filed document which is also incorporated or deemed to be incorporated herein
modifies or supersedes such statement. Any such statement so modified or superseded shall not be
deemed, except as so modified or superseded, to constitute a part of this Registration Statement.
Item 8. Exhibits.
The following documents are filed as exhibits to this Registration Statement:
Exhibit
Number
Description of Document
4.1
Form of Second Amended and Restated Certificate of Incorporation of the
Registrant (incorporated by reference to Exhibit 3.2 to Registration
Statement No. 333-136521 filed with the Commission on August 11, 2006).
4.2
Form of Certificate of Amendment of Certificate of Incorporation of the
Registrant (incorporated by reference to Exhibit 3.4 to Registration
Statement No. 333-136521 filed with the Commission on November 24, 2006).
1
Exhibit
Number
Description of Document
4.3
Amended and Restated By-laws of the Registrant (incorporated by reference
to Exhibit 3.4 to Registration Statement No. 333-136521 filed with the
Commission on August 11, 2006).
4.4
Specimen Stock Certificate (incorporated by reference to Exhibit 4.1 to
Registration Statement No. 333-136521 filed with the Commission on
November 14, 2006).
4.5
IPG Photonics Corporation 2006 Incentive Compensation Plan, as amended
February 23, 2011 (incorporated by reference to Appendix A to the
Registrant's Definitive Revised Proxy Statement on Schedule 14A, File No.
001-33155, filed with the Commission on May 12, 2011).
5.1
Opinion of Winston & Strawn LLP.
23.1
Consent of Deloitte & Touche LLP.
23.2
Consent of Winston & Strawn LLP (included in opinion filed as Exhibit 5.1).
24.1
Powers of Attorney (included on signature page).
2
SIGNATURES
Pursuant to the requirements of the 1933 Act, the Registrant certifies that it has reasonable
grounds to believe that it meets all of the requirements for filing on Form S-8 and has duly caused
this Registration Statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in Oxford, Massachusetts, on November 8, 2011.
IPG PHOTONICS CORPORATION
By:
Name:
/s/ Valentin P. Gapontsev
Valentin P. Gapontsev
Title:
Chief Executive Officer and Chairman of the Board
POWER OF ATTORNEY
KNOW ALL MEN BY THESE PRESENTS
, that each person whose signature appears below constitutes and
appoints Valentin P. Gapontsev as such person's true and lawful attorney-in-fact and agent, with
full power of substitution and revocation, for such person and in such person's name, place and
stead, in any and all capacities to sign any and all amendments (including post-effective
amendments) to this Registration Statement, and to file the same with all exhibits thereto, and the
other documents in connection therewith, and any registration statement relating to any offering
made pursuant to this Registration Statement that is to be effective upon filing pursuant to Rule
462(b) under the 1933 Act with the Securities and Exchange Commission, granting unto said
attorney-in-fact and agent full power and authority to do and perform each and every act and things
requisite and necessary to be done, as fully to all intents and purposes as such person might or
could do in person, hereby ratifying and confirming all that said attorney-in-fact and agent, or
his substitute, may lawfully do or cause to be done by virtue hereof.
Pursuant to the requirements of the 1933 Act, the registrant has duly caused this registration
statement to be signed on its behalf by the undersigned, thereunto duly authorized, in Oxford,
Massachusetts, on November 8, 2011.
Signature Title
Title
Date
/s/Valentin P. Gapontsev
Valentin P. Gapontsev
Chief Executive Officer, Chairman
of the Board and Director
November 8, 2011
(Principal Executive Officer)
/s/ Timothy P.V. Mammen
Timothy P.V. Mammen
Chief Financial Officer (Principal
Financial Officer and
November 8, 2011
Principal Accounting Officer)
/s/Robert A. Blair
Robert A. Blair
Director
November 8, 2011
/s/ Michael C. Child
Michael C. Child
Director
November 8, 2011
/s/ Henry E. Gauthier
Henry E. Gauthier
Director
November 8, 2011
/s/William S. Hurley
William S. Hurley
Director
November 8, 2011
/s/Michael R. Kampfe
Michael R. Kampfe
Director
November 8, 2011
3
Signature Title
Title
Date
/s/William F. Krupke
William F. Krupke
Director
November 8, 2011
/s/Eugene Scherbakov
Eugene Scherbakov
Director
November 8, 2011
/s/Igor Samartsev
Igor Samartsev
Director
November 8, 2011
4
EXHIBIT INDEX
Exhibit
Number
Description of Document
4.1
Form of Second Amended and Restated Certificate of Incorporation of the
Registrant (incorporated by reference to Exhibit 3.2 to Registration
Statement No. 333-136521 filed with the Commission on August 11, 2006).
4.2
Form of Certificate of Amendment of Certificate of Incorporation of the
Registrant (incorporated by reference to Exhibit 3.4 to Registration
Statement No. 333-136521 filed with the Commission on November 24, 2006).
4.3
Amended and Restated By-laws of the Registrant (incorporated by reference
to Exhibit 3.4 to Registration Statement No. 333-136521 filed with the
Commission on August 11, 2006).
4.4
Specimen Stock Certificate (incorporated by reference to Exhibit 4.1 to
Registration Statement No. 333-136521 filed with the Commission on
November 14, 2006).
4.5
IPG Photonics Corporation 2006 Incentive Compensation Plan, as amended
February 23, 2011 (incorporated by reference to Appendix A to the
Registrant's Definitive Revised Proxy Statement on Schedule 14A, File No.
001-33155, filed with the Commission on May 12, 2011).
5.1
Opinion of Winston & Strawn LLP.
23.1
Consent of Deloitte & Touche LLP.
23.2
Consent of Winston & Strawn LLP (included in opinion filed as Exhibit 5.1).
24.1
Powers of Attorney (included on signature page).
5