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      STATES</font></div>
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      8-K</font></div>
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      Report Pursuant to Section 13</font></div>
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      the
      Securities Exchange Act of 1934 </font></div>
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    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Date
      of
      Report (Date Earliest Event reported) &#8212; May 8, 2006</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>&#160;</strong></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(May
      4,
      2006)</font></div>
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    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 20pt; FONT-FAMILY: Times New Roman"><strong>MDC
      PARTNERS INC.</strong></font></div>
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      name of registrant as specified in its charter) </font></div>
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              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(Jurisdiction
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              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(Commission
                File Number)</font></div>
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              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">98-0364441</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(IRS
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    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">45
      Hazelton Ave., Toronto, Ontario, Canada M5R 2E3</font></div>
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      of principal executive offices and zip code) </font></div>
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      960-9000</font></div>
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      Telephone Number) </font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;

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    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Check
      the
      appropriate box below if the Form 8&#8722;K filing is intended to simultaneously
      satisfy the filing obligation of the registrant under any of the following
      provisions (see General Instruction A.2. below):</font></div>
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            <td align="left" style="width: 18pt;"><font size="2" face="Wingdings">o</font></td>
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              <div align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Written
                communications pursuant to Rule 425 under the Securities Act (17
                CFR
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            <td align="left" style="width: 18pt;"><font size="2" face="Wingdings">o</font></td>
            <td align="left">
              <div align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Soliciting
                material pursuant to Rule 14a&#8722;12 under the Exchange Act (17 CFR
                240.14a&#8722;12)</font></div>
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            <td align="left" style="width: 18pt;"><font size="2" face="Wingdings">o</font></td>
            <td align="left">
              <div align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Pre&#8722;commencement
                communications pursuant to Rule 14d&#8722;2(b) under the Exchange Act (17 CFR
                240.14d&#8722;2(b))</font></div>
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              <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font size="2" face="Wingdings">o</font></div>
            </td>
            <td>
              <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Pre&#8722;commencement
                communications pursuant to Rule 13e&#8722;4(c) under the Exchange Act (17 CFR
                240.13e&#8722; 4(c))</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">&#160;</font></div>
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    <div style="DISPLAY: block; MARGIN-LEFT: 18pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>Item
      7.01. Regulation FD Disclosure.</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 18pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">On
      May 4,
      2006, the Company issued a press release announcing its financial results for
      the period ended March 31, 2006. Such press release also announced that
      management would host a conference call to discuss these filings. The investor
      presentation materials used for the conference call are attached as Exhibit
      99.2
      hereto. On May 4, 2006, the Company posted the materials attached as Exhibit
      99.2 on its web site (</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><u>www.mdc-partners.com</u></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">).
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    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">On
      May 8,
      the Company posted the investor presentation materials attached as Exhibit
      99.3
      hereto on its web site (</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><u>www.mdc-partners.com</u></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">).
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      materials were used for an investor presentation on May 8, 2006. </font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">These
      investor presentation materials 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.</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">The
      foregoing information (including the exhibits hereto) is being furnished under
      &#8220;Item 7.01. Regulation FD Disclosure.&#8221; 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.</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>Item
      9.01. Financial Statements and Exhibits.</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 54pt; TEXT-INDENT: -54pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 54pt; TEXT-INDENT: -54pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(c)
      Exhibits.</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 27pt; TEXT-INDENT: -27pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><br></div>
    <div>
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          <tr valign="top" style="line-height: 1.25;">
            <td align="left" style="width: 27pt;"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">99.1</font></td>
            <td align="left">
              <div align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Press
                release dated as of May 4, 2006, relating to the announcement of
                the
                Company&#8217;s financial results for the period ended March 31,
                2006.</font></div>
            </td>
          </tr>

      </table>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 27pt; TEXT-INDENT: -27pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><br></div>
    <div>
      <table align="center" border="0" cellpadding="0" cellspacing="0" id="hangingindent" width="100%" style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt">

          <tr valign="top" style="line-height: 1.25;">
            <td align="left" style="width: 27pt;"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">99.2</font></td>
            <td align="left">
              <div align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Slideshow
                presentation dated May 4, 2006.</font></div>
            </td>
          </tr>

      </table>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 27pt; TEXT-INDENT: -27pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><br></div>
    <div>
      <table align="center" border="0" cellpadding="0" cellspacing="0" id="hangingindent" width="100%" style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt">

          <tr valign="top" style="line-height: 1.25;">
            <td align="left" style="width: 27pt;"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">99.3</font></td>
            <td align="left">
              <div align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Investor
                presentation materials dated May 8,
                2006.</font></div>
            </td>
          </tr>

      </table>
    </div>
    <div>&#160;</div>
    <div id="PGBRK" style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt">
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        <div id="GLFTR" style="WIDTH: 100%" align="left">&#160;</div>
      </div>
      <div id="PN" style="PAGE-BREAK-AFTER: always">
        <div style="WIDTH: 100%; TEXT-ALIGN: center"><font style="DISPLAY: inline; FONT-SIZE: 8pt; FONT-FAMILY: ">2</font></div>
        <div style="WIDTH: 100%; TEXT-ALIGN: center">
          <hr style="COLOR: black" noshade size="2">
        </div>
      </div>
      <div id="HDR">
        <div id="GLHDR" style="WIDTH: 100%" align="right">&#160;</div>
      </div>
    </div><br>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>Signatures</strong></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">&#160;</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 36pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">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. </font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left">
      <table align="center" bgcolor="#ffffff" border="0" cellpadding="0" cellspacing="0" width="100%">

          <tr valign="top" bgcolor="#ffffff">
            <td width="50%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: ">&#160;</font></td>
            <td width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: ">&#160;</font></td>
            <td width="49%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: ">&#160;</font></td>
          </tr>
          <tr valign="top" bgcolor="#ffffff">
            <td>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Date:
                May 8, 2006</font></div>
            </td>
            <td colspan="2">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">MDC
                Partners Inc.</font></div>
            </td>
          </tr>
          <tr valign="top" bgcolor="#ffffff">
            <td><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: ">&#160;<br>&#160;</font></td>
            <td><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: ">&#160;<br>&#160;</font></td>
            <td><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: ">&#160;<br>&#160;</font></td>
          </tr>
          <tr valign="top" bgcolor="#ffffff">
            <td><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: ">&#160;</font></td>
            <td><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: ">By:&#160;&#160;</font></td>
            <td><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: ">/s/
              Mitchell Gendel </font></td>
          </tr>
          <tr valign="top" bgcolor="#ffffff">
            <td colspan="2"><font style="FONT-FAMILY: " size="1">&#160;</font></td>
            <td align="left">
              <hr style="COLOR: black" align="left" noshade size="2" width="80%"><font size="2">Mitchell
              Gendel</font></td>
          </tr>
          <tr valign="top" bgcolor="#ffffff">
            <td colspan="2"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: ">&#160;</font></td>
            <td>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">General
                Counsel &amp; Corporate
                Secretary</font></div>
            </td>
          </tr>

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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": "06814891"}, "business-address": {"street1": "45 HAZELTON AVE", "city": "TORONTO", "state": "A6", "zip": "M5R 2E3", "phone": "646 429 1800"}, "mail-address": {"street1": "MDC PARTNERS INC. - LEGAL DEPT.", "street2": "950 THIRD AVENUE", "city": "NEW YORK", "state": "NY", "zip": "10022"}, "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
of
      the
      Securities Exchange Act of 1934
Date
      of
      Report (Date Earliest Event reported) — May 8, 2006
(May
      4,
      2006)
MDC
      PARTNERS INC.
(Exact
      name of registrant as specified in its charter)
Ontario
(Jurisdiction
                of Incorporation)
001-13718
(Commission
                File Number)
98-0364441
(IRS
                Employer Identification No.)
45
      Hazelton Ave., Toronto, Ontario, Canada M5R 2E3
(Address
      of principal executive offices and zip code)
(416)
      960-9000
(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 (see General Instruction A.2. below):
o
Written
                communications pursuant to Rule 425 under the Securities Act (17
                CFR
                230.425)
o
Soliciting
                material pursuant to Rule 14a−12 under the Exchange Act (17 CFR
                240.14a−12)
o
Pre−commencement
                communications pursuant to Rule 14d−2(b) under the Exchange Act (17 CFR
                240.14d−2(b))
o
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
      May 4,
      2006, the Company issued a press release announcing its financial results for
      the period ended March 31, 2006. Such press release also announced that
      management would host a conference call to discuss these filings. The investor
      presentation materials used for the conference call are attached as Exhibit
      99.2
      hereto. On May 4, 2006, the Company posted the materials attached as Exhibit
      99.2 on its web site (
www.mdc-partners.com
).
On
      May 8,
      the Company posted the investor presentation materials attached as Exhibit
      99.3
      hereto on its web site (
www.mdc-partners.com
).
      These
      materials were used for an investor presentation on May 8, 2006.
These
      investor presentation materials 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.
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.
Item
      9.01. Financial Statements and Exhibits.
(c)
      Exhibits.
99.1
Press
                release dated as of May 4, 2006, relating to the announcement of
                the
                Company's financial results for the period ended March 31,
                2006.
99.2
Slideshow
                presentation dated May 4, 2006.
99.3
Investor
                presentation materials dated May 8,
                2006.
2
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:
                May 8, 2006
MDC
                Partners Inc.
By:
/s/
              Mitchell Gendel
Mitchell
              Gendel
General
                Counsel & Corporate
                Secretary
3