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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>UNITED STATES</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>SECURITIES AND EXCHANGE COMMISSION<BR>
WASHINGTON, D.C. 20549 </B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>FORM 8-K</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">Current Report Pursuant to Section 13 or
15(d)<BR>
of the Securities Exchange Act of 1934</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">Date of Report (Date Earliest Event reported)
&mdash; April 4, 2012 (April 4, 2012)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>MDC PARTNERS INC.</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">(Exact name of registrant as specified in
its charter)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

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    <TD STYLE="width: 38%; font-size: 10pt; text-align: center">Canada</TD>
    <TD STYLE="font-size: 10pt; text-align: center; width: 27%">001-13718</TD>
    <TD STYLE="width: 35%; font-size: 10pt; text-align: center">98-0364441</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt; text-align: center">&nbsp;(Jurisdiction of Incorporation)</TD>
    <TD STYLE="font-size: 10pt; text-align: center">(Commission File Number)</TD>
    <TD STYLE="font-size: 10pt; text-align: center">&nbsp;(IRS Employer Identification No.)</TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">745 Fifth Avenue, 19<SUP>th</SUP> Floor,
New York, NY 10151<BR>
(Address of principal executive offices and zip code)</P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">(646) 429-1800<BR>
(Registrant&rsquo;s Telephone Number)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Check the appropriate box below if the Form 8&minus;K filing
is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

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<TD STYLE="width: 0"></TD><TD STYLE="width: 0.25in"><FONT STYLE="font-family: Wingdings">&uml;</FONT></TD><TD><FONT STYLE="font-family: Times New Roman, Times, Serif">Written communications pursuant to Rule 425 under the Securities Act
(17 CFR 230.425)</FONT></TD></TR></TABLE>

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<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 0.25in"><FONT STYLE="font-family: Wingdings">&uml;</FONT></TD><TD><FONT STYLE="font-family: Times New Roman, Times, Serif">Soliciting material pursuant to Rule 14a&minus;12 under the Exchange
Act (17 CFR 240.14a&minus;12)</FONT></TD></TR></TABLE>

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<TD STYLE="width: 0"></TD><TD STYLE="width: 0.25in"><FONT STYLE="font-family: Wingdings">&uml;</FONT></TD><TD><FONT STYLE="font-family: Times New Roman, Times, Serif">Pre&minus;commencement communications pursuant to Rule 14d&minus;2(b)
under the Exchange Act (17 CFR 240.14d&minus;2(b))</FONT></TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in; text-indent: -0.25in">&nbsp;</P>

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<TD STYLE="width: 0"></TD><TD STYLE="width: 0.25in"><FONT STYLE="font: 10pt Wingdings">&uml;</FONT></TD><TD><FONT STYLE="font: 10pt Times New Roman, Times, Serif">Pre&minus;commencement communications pursuant to Rule 13e&minus;4(c)
under the Exchange Act (17 CFR 240.13e&minus; 4(c))</FONT></TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in; text-indent: -0.25in">&nbsp;</P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in; text-indent: -0.25in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"><B>Item 7.01 Regulation FD Disclosure.</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">On April 4, 2012, MDC
Partners Inc. (the &ldquo;Company&rdquo;) issued a press release revising its financial guidance for the fiscal year ending December
31, 2012. A copy of this press release is attached as Exhibit 99.1 hereto. Following the issuance of this press release, the Company
will host an investor call in which its revised financial guidance for fiscal year 2012 will be discussed. The investor presentation
materials that will be used for the call are attached as Exhibit 99.2 hereto.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">The Company has posted
the materials attached as Exhibit 99.2 on its web site (<FONT STYLE="text-underline-style: none; color: windowtext">www.mdc-partners.com</FONT>).
The information found on, or otherwise accessible through, the Company&rsquo;s website is not incorporated into, and does not form
a part of, this Current Report on Form 8-K.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">The Company today also
announced that its Board of Directors has declared a cash dividend of $0.28 per share on all of its outstanding Class A shares
and Class B shares. The semi-annual dividend will be payable on or about May 22, 2012 to shareholders of record at the close of
business on May 8, 2012.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">The foregoing information
(including the exhibits hereto) is being furnished under &ldquo;Item 7.01 - Regulation FD Disclosure.&rdquo; Such information (including
the exhibits hereto) shall not be deemed &ldquo;filed&rdquo; for purposes of Section 18 of the Securities Exchange Act of 1934,
as amended, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except
as shall be expressly set forth by specific reference in such filing.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">The foregoing information
and the exhibits hereto contain forward-looking statements within the meaning of the federal securities laws. These statements
are based on present expectations, and are subject to the limitations listed therein and in the Company's other SEC reports, including
that actual events or results may differ materially from those in the forward-looking statements.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"><B>Item 9.01. Financial Statements and
Exhibits.</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.75in; text-align: justify; text-indent: -0.75in">(d) Exhibits.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.75in; text-align: justify; text-indent: -0.75in">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; border-collapse: collapse; font-family: Times New Roman, Times, Serif">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 4%; font-size: 10pt; text-align: justify">99.1</TD>
    <TD STYLE="width: 96%; font-size: 10pt; text-align: justify">Press release dated April 4, 2012, relating to the Company&rsquo;s revised financial guidance for Fiscal Year 2012 and divided declaration.</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt; text-align: justify">&nbsp;</TD>
    <TD STYLE="font-size: 10pt; text-align: justify">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt; text-align: justify">99.2</TD>
    <TD STYLE="font-size: 10pt; text-align: justify">Slideshow presentation dated April 4, 2012.</TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>&nbsp;</B></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Signatures</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">Pursuant to the requirements of the Securities
Exchange Act of 1934, the registrant has duly caused this report to be signed by the undersigned hereunto duly authorized.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD>Date: April 4, 2012 &nbsp;</TD>
    <TD COLSPAN="2">MDC Partners Inc.</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 50%">&nbsp;</TD>
    <TD STYLE="width: 8%">&nbsp;</TD>
    <TD STYLE="width: 42%">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>By:</TD>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid">/s/ Mitchell Gendel</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>Mitchell Gendel</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>General Counsel &amp; Corporate</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>Secretary</TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>



<P STYLE="margin: 0"></P>

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{"company-data": {"conformed-name": "MDC PARTNERS INC", "cik": "0000876883", "assigned-sic": "7311", "irs-number": "980364441", "state-of-incorporation": "A6", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "001-13718", "film-number": "12740339"}, "business-address": {"street1": "745 FIFTH AVENUE, 19TH FLOOR", "city": "NEW YORK", "state": "NY", "zip": "10151", "phone": "646 429 1800"}, "mail-address": {"street1": "745 FIFTH AVENUE, 19TH FLOOR", "city": "NEW YORK", "state": "NY", "zip": "10151"}, "former-company": [{"former-conformed-name": "MDC CORP INC", "date-changed": "20001204"}, {"former-conformed-name": "MDC COMMUNICATIONS CORP", "date-changed": "19961028"}, {"former-conformed-name": "MDC CORPORATION", "date-changed": "19950419"}]}
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 Earliest Event reported)
— April 4, 2012 (April 4, 2012)
MDC PARTNERS INC.
(Exact name of registrant as specified in
its charter)
Canada
001-13718
98-0364441
(Jurisdiction of Incorporation)
(Commission File Number)
(IRS Employer Identification No.)
745 Fifth Avenue, 19
th
Floor,
New York, NY 10151
(Address of principal executive offices and zip code)
(646) 429-1800
(Registrant's Telephone Number)
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 7.01 Regulation FD Disclosure.
On April 4, 2012, MDC
Partners Inc. (the "Company") issued a press release revising its financial guidance for the fiscal year ending December
31, 2012. A copy of this press release is attached as Exhibit 99.1 hereto. Following the issuance of this press release, the Company
will host an investor call in which its revised financial guidance for fiscal year 2012 will be discussed. The investor presentation
materials that will be used for the call are attached as Exhibit 99.2 hereto.
The Company has posted
the materials attached as Exhibit 99.2 on its web site (
www.mdc-partners.com
).
The information found on, or otherwise accessible through, the Company's website is not incorporated into, and does not form
a part of, this Current Report on Form 8-K.
The Company today also
announced that its Board of Directors has declared a cash dividend of $0.28 per share on all of its outstanding Class A shares
and Class B shares. The semi-annual dividend will be payable on or about May 22, 2012 to shareholders of record at the close of
business on May 8, 2012.
The foregoing information
(including the exhibits hereto) is being furnished under "Item 7.01 - Regulation FD Disclosure." Such information (including
the exhibits hereto) shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934,
as amended, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except
as shall be expressly set forth by specific reference in such filing.
The foregoing information
and the exhibits hereto contain forward-looking statements within the meaning of the federal securities laws. These statements
are based on present expectations, and are subject to the limitations listed therein and in the Company's other SEC reports, including
that actual events or results may differ materially from those in the forward-looking statements.
2
Item 9.01. Financial Statements and
Exhibits.
(d) Exhibits.
99.1
Press release dated April 4, 2012, relating to the Company's revised financial guidance for Fiscal Year 2012 and divided declaration.
99.2
Slideshow presentation dated April 4, 2012.
3
Signatures
Pursuant to the requirements of the Securities
Exchange Act of 1934, the registrant has duly caused this report to be signed by the undersigned hereunto duly authorized.
Date: April 4, 2012
MDC Partners Inc.
By:
/s/ Mitchell Gendel
Mitchell Gendel
General Counsel & Corporate
Secretary
4