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<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:center;"><b>UNITED STATES<br>
<font style="font-family:Times New Roman, Times, serif;font-size:10pt;">SECURITIES AND EXCHANGE COMMISSION</font></b></p>

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<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:center;"><b>Washington, D.C. 20549</b></p>

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<p style="font-family:Times New Roman, Times, serif;font-size:18pt;margin:0pt;text-align:center;"><b>FORM 8-K</b></p>

<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:center;">&nbsp;<font style="font-family:Times New Roman, Times, serif;font-size:10pt;">&nbsp;</font></p>

<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:center;"><b>CURRENT REPORT</b></p>

<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:center;">&nbsp;</p>

<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:center;"><b>PURSUANT TO SECTION 13 OR 15(d) OF</b></p>

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<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:center;"><b>THE SECURITIES EXCHANGE ACT OF 1934</b></p>

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<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:center;"><b>Date of Report (Date of earliest event reported): </b><font style="font-family:Times New Roman, Times, serif;font-size:10pt;"><b>November 8</b><b>, 2016</b></font></p>

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<p style="font-family:Times New Roman, Times, serif;font-size:18pt;margin:0pt;text-align:center;"><b>Proto Labs, Inc.</b></p>

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<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:center;">(Exact name of registrant as specified in its charter)</p>

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			<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:center;">Minnesota</p>
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			<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:center;">001-35435</p>
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			<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:left;">&nbsp;</p>
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			<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:center;">41-1939628</p>
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			<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:center;">(State or other jurisdiction</p>

			<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:center;">&nbsp;</p>

			<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:center;">of incorporation)</p>
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			<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:center;">(Commission File Number)</p>
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			<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:center;">(IRS Employer</p>

			<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:center;">&nbsp;</p>

			<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:center;">Identification Number)</p>
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			<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:center;">5540 Pioneer Creek Drive</p>

			<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:center;">&nbsp;<font style="font-family:Times New Roman, Times, serif;font-size:10pt;">Maple Plain, Minnesota</font></p>
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			<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:left;">&nbsp;</p>
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			<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:center;">55359</p>
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			<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:center;">(Address of principal executive offices)</p>
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			<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:center;">(Zip Code)</p>
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			<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:left;">&nbsp;</p>
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			<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:left;">&nbsp;</p>
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			<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:left;">&nbsp;</p>
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			<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:center;">Registrant<font style="font-family:Times New Roman, Times, serif;font-size:10pt;">&rsquo;s telephone number, including area code:</font></p>
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			<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:left;">&nbsp;</p>
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			<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:center;">(763) 479-3680</p>
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<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:left;">&nbsp;</p>

<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:left;">&nbsp;</p>

<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:left;">&nbsp;</p>

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			<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:center;">Not Applicable</p>
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			<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:center;">(Former name or former address, if changed since last report)</p>
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<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:left;">&nbsp;</p>

<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:left;">Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:</p>

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<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:left;">&#9744;<font style="font-family:Times New Roman, Times, serif;font-size:10pt;">&nbsp;Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)</font></p>

<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:left;">&nbsp;</p>

<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:left;">&#9744;<font style="font-family:Times New Roman, Times, serif;font-size:10pt;">&nbsp;Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)</font></p>

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<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:left;">&#9744;<font style="font-family:Times New Roman, Times, serif;font-size:10pt;">&nbsp;Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))</font></p>

<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:left;">&nbsp;</p>

<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:left;">&#9744;<font style="font-family:Times New Roman, Times, serif;font-size:10pt;">&nbsp;Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))</font></p>

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<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:left;"><b>Item<font style="font-family:Times New Roman, Times, serif;font-size:10pt;">&nbsp;5.0</font></b><font style="font-family:Times New Roman, Times, serif;font-size:10pt;"><b>3</b><b>.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</b><b>Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year</b><b>.</b></font></p>

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<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:justify;">On <font style="font-family:Times New Roman, Times, serif;font-size:10pt;">November 8, 2016, the Board of Directors (the &ldquo;Board&rdquo;) of Proto Labs, Inc. (the &ldquo;Company&rdquo;) approved an amendment and restatement of the Company&rsquo;s by-laws effective as of that date (the &ldquo;Second Amended and Restated By-Laws&rdquo;). The Second Amended and Restated By-Laws were adopted in response to the approval by shareholders at the Company&rsquo;s Annual Meeting of Shareholders held on May 19, 2016 of a shareholder proposal to adopt proxy access.</font></p>

<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:justify;">&nbsp;</p>

<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:justify;">The <font style="font-family:Times New Roman, Times, serif;font-size:10pt;">Second Amended and Restated By-Laws include a new Section 2.17, which permits an eligible shareholder, or an eligible group of up to 20 shareholders, owning continuously for at least three years shares of the Company representing an aggregate of at least three percent of the voting power entitled to vote in the election of directors, to nominate and include in the Company&rsquo;s annual meeting proxy materials director nominees not to exceed the greater of (i)&nbsp;two or (ii)&nbsp;25 percent of the number of directors then serving on the Board, or, if such amount is not a whole number, the closest whole number below 25 percent, but not less than two. Such nominations are subject to certain eligibility, procedural, and disclosure requirements set forth in Section 2.17, including the requirement that the Company must receive notice of such nominations not less than 120 calendar days prior to the anniversary date of the prior year&rsquo;s annual proxy materials mailing, except as otherwise provided in Section 2.17.</font></p>

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<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:justify;">The foregoing description is qualified in its entirety by reference to the <font style="font-family:Times New Roman, Times, serif;font-size:10pt;">Second Amended and Restated By-Laws of the Company, as amended through November 8, 2016, a copy of which is filed as Exhibit 3.1 to this Current Report on Form&nbsp;8-K and incorporated by reference herein.</font></p>

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<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:justify;"><b>Item<font style="font-family:Times New Roman, Times, serif;font-size:10pt;">&nbsp;9.01.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Financial Statements and Exhibits.</font></b></p>

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<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:justify;">(<font style="font-family:Times New Roman, Times, serif;font-size:10pt;"><b>d) Exhibits</b></font></p>

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			<p style="font-family:Times New Roman, Times, serif;margin-right:0pt;margin-top:0pt;text-align:justify;margin-bottom:0pt;font-size:10pt;">3.1</p>
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			<p style="font-family:Times New Roman, Times, serif;margin-right:0pt;margin-top:0pt;text-align:justify;margin-bottom:0pt;font-size:10pt;"><font style="font-size:10pt;font-family:Times New Roman, Times, serif;">Second Amended and Restated By-Laws of Proto Labs, Inc., as amended through November 8, 2016.</font></p>
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<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:center;"><b>SIGNATURE</b></p>

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<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:left;">Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.</p>

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			<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:left;">&nbsp;</p>
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			<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:left;">Proto Labs,<font style="font-family:Times New Roman, Times, serif;font-size:10pt;">&nbsp;Inc.</font></p>
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			<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:left;">&nbsp;</p>
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			<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:left;">Date:</p>
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			<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:left;">November <font style="font-family:Times New Roman, Times, serif;font-size:10pt;">8, 2016</font></p>
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			<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:left;">By:</p>
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			<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:left;">/s/ <font style="font-family:Times New Roman, Times, serif;font-size:10pt;">Victoria M. Holt</font></p>
			</td>
			<td style="vertical-align:top;width:7.8%;">
			<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:left;">&nbsp;</p>
			</td>
		</tr>
		<tr>
			<td style="vertical-align: top; width: 58px;">
			<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:left;">&nbsp;</p>
			</td>
			<td style="vertical-align: top; width: 683px;">
			<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:left;">&nbsp;</p>
			</td>
			<td style="vertical-align: top; width: 44px;">
			<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:left;">&nbsp;</p>
			</td>
			<td style="vertical-align: top; width: 456px;">
			<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:left;">Victoria M. Holt</p>
			</td>
			<td style="vertical-align:top;width:7.8%;">
			<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:left;">&nbsp;</p>
			</td>
		</tr>
		<tr>
			<td style="vertical-align: top; width: 58px;">
			<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:left;">&nbsp;</p>
			</td>
			<td style="vertical-align: top; width: 683px;">
			<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:left;">&nbsp;</p>
			</td>
			<td style="vertical-align: top; width: 44px;">
			<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:left;">&nbsp;</p>
			</td>
			<td style="vertical-align: top; width: 456px;">
			<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:left;">Chief <font style="font-family:Times New Roman, Times, serif;font-size:10pt;">Executive Officer</font></p>
			</td>
			<td style="vertical-align:top;width:7.8%;">
			<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:left;">&nbsp;</p>
			</td>
		</tr>

</table>

<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:left;">&nbsp;</p>

<div id="PGBK" style="WIDTH: 100%; MARGIN-LEFT: 0pt; MARGIN-RIGHT: 0pt">
<div id="PGNUM" style="text-align: center; width: 100%; font-family: Times New Roman; font-size: 10pt;">3</div>

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<div id="PGHDR" style="TEXT-ALIGN: left; WIDTH: 100%">&nbsp;</div>
</div>

<p style="font-family: Times New Roman, Times, serif; font-size: 10pt; margin-top: 0pt; margin-bottom: 0pt;">&nbsp;</p>

<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:center;"><b>EXHIBIT INDEX</b></p>

<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:center;">&nbsp;</p>

<table border="0" cellpadding="0" cellspacing="0" id="TBL6" style="width:100%;text-indent:0;font-family:Times New Roman, Times, serif;font-size:10pt;">

		<tr>
			<td style="vertical-align:bottom;border-bottom:solid 1px #000000;;width:9.4%;">
			<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:left;"><b>Exhibit No.</b></p>
			</td>
			<td style="vertical-align:bottom;width:2.1%;">&nbsp;</td>
			<td style="vertical-align:bottom;border-bottom:solid 1px #000000;;width:88.5%;">
			<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:center;"><b>Description</b></p>
			</td>
		</tr>
		<tr>
			<td style="vertical-align:top;width:9.4%;">&nbsp;</td>
			<td style="vertical-align:bottom;width:2.1%;">&nbsp;</td>
			<td style="vertical-align:top;width:88.5%;">&nbsp;</td>
		</tr>
		<tr>
			<td style="vertical-align:top;width:9.4%;">
			<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:left;">3.1</p>
			</td>
			<td style="vertical-align:bottom;width:2.1%;">&nbsp;</td>
			<td style="vertical-align:top;width:88.5%;">
			<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:left;">Second <font style="font-family:Times New Roman, Times, serif;font-size:10pt;">Amended and Restated By-Laws of Proto Labs, Inc., as amended through November 8, 2016.</font></p>
			</td>
		</tr>

</table>

<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:left;">&nbsp;</p>

<p style="font-family:Times New Roman, Times, serif;font-size:10pt;margin:0pt;text-align:left;">&nbsp;</p>

<p style="font-family: Times New Roman,Times,serif; font-size: 10pt; margin: 0pt; text-align: center;">4</p>
</body></html>
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{"company-data": {"conformed-name": "Proto Labs Inc", "cik": "0001443669", "assigned-sic": "3440", "irs-number": "000000000", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "001-35435", "film-number": "161982023"}, "business-address": {"street1": "5540 Pioneer Creek", "city": "Maple Plain", "state": "MN", "zip": "55359", "phone": "763-479-7474"}, "mail-address": {"street1": "5540 Pioneer Creek", "city": "Maple Plain", "state": "MN", "zip": "55359"}}
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 8-K
CURRENT REPORT
PURSUANT TO SECTION 13 OR 15(d) OF
THE SECURITIES EXCHANGE ACT OF 1934
Date of Report (Date of earliest event reported):
November 8
, 2016
Proto Labs, Inc.
(Exact name of registrant as specified in its charter)
Minnesota
001-35435
41-1939628
(State or other jurisdiction
of incorporation)
(Commission File Number)
(IRS Employer
Identification Number)
5540 Pioneer Creek Drive
Maple Plain, Minnesota
55359
(Address of principal executive offices)
(Zip Code)
Registrant
's telephone number, including area code:
(763) 479-3680
Not Applicable
(Former name or former address, if changed since last report)
Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:
☐
Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
☐
Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
☐
Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
☐
Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))
Item
5.0
3
.
Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year
.
On
November 8, 2016, the Board of Directors (the "Board") of Proto Labs, Inc. (the "Company") approved an amendment and restatement of the Company's by-laws effective as of that date (the "Second Amended and Restated By-Laws"). The Second Amended and Restated By-Laws were adopted in response to the approval by shareholders at the Company's Annual Meeting of Shareholders held on May 19, 2016 of a shareholder proposal to adopt proxy access.
The
Second Amended and Restated By-Laws include a new Section 2.17, which permits an eligible shareholder, or an eligible group of up to 20 shareholders, owning continuously for at least three years shares of the Company representing an aggregate of at least three percent of the voting power entitled to vote in the election of directors, to nominate and include in the Company's annual meeting proxy materials director nominees not to exceed the greater of (i) two or (ii) 25 percent of the number of directors then serving on the Board, or, if such amount is not a whole number, the closest whole number below 25 percent, but not less than two. Such nominations are subject to certain eligibility, procedural, and disclosure requirements set forth in Section 2.17, including the requirement that the Company must receive notice of such nominations not less than 120 calendar days prior to the anniversary date of the prior year's annual proxy materials mailing, except as otherwise provided in Section 2.17.
The foregoing description is qualified in its entirety by reference to the
Second Amended and Restated By-Laws of the Company, as amended through November 8, 2016, a copy of which is filed as Exhibit 3.1 to this Current Report on Form 8-K and incorporated by reference herein.
Item
9.01.     Financial Statements and Exhibits.
(
d) Exhibits
3.1
Second Amended and Restated By-Laws of Proto Labs, Inc., as amended through November 8, 2016.
2
SIGNATURE
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.
Proto Labs,
Inc.
Date:
November
8, 2016
By:
/s/
Victoria M. Holt
Victoria M. Holt
Chief
Executive Officer
3
EXHIBIT INDEX
Exhibit No.
Description
3.1
Second
Amended and Restated By-Laws of Proto Labs, Inc., as amended through November 8, 2016.
4