<SUBMISSION>
<ACCESSION-NUMBER>0000950103-09-002262
<TYPE>DEFA14A
<PUBLIC-DOCUMENT-COUNT>2
<FILING-DATE>20090914
<DATE-OF-FILING-DATE-CHANGE>20090914
<EFFECTIVENESS-DATE>20090914
<FILER>
<COMPANY-DATA>
<CONFORMED-NAME>GHL Acquisition Corp.
<CIK>0001418819
<ASSIGNED-SIC>3669
<IRS-NUMBER>000000000
<STATE-OF-INCORPORATION>DE
<FISCAL-YEAR-END>1231
</COMPANY-DATA>
<FILING-VALUES>
<FORM-TYPE>DEFA14A
<ACT>34
<FILE-NUMBER>001-33963
<FILM-NUMBER>091068176
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<BUSINESS-ADDRESS>
<STREET1>C/O GREENHILL & CO.
<STREET2>300 PARK AVENUE
<CITY>NEW YORK
<STATE>NY
<ZIP>10022
<PHONE>212-389-1500
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>C/O GREENHILL & CO.
<STREET2>300 PARK AVENUE
<CITY>NEW YORK
<STATE>NY
<ZIP>10022
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<FILENAME>dp14777_8k.htm
<DESCRIPTION>FORM 8-K
<TEXT>
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STATES</font></div>
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AND EXCHANGE COMMISSION</font></div>
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D.C.&#160;&#160;20549</font></div>
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8-K</font></div>
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      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 16pt; FONT-FAMILY: Times New Roman, serif">CURRENT
REPORT</font></div>
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To Section 13 Or 15(d) of The Securities Exchange Act of 1934</font></div>
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      of report (Date of earliest event reported): September 11,
      2009</font></div>
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      389-1500</font></font></div>
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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):</font></div>
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      <font style="DISPLAY: inline; FONT-FAMILY: wingdings">o</font></font></td>
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      communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR
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      <div style="DISPLAY: block; TEXT-INDENT: 0pt">&#160;</div>
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        <hr style="MARGIN-TOP: -5px; COLOR: #000000" noshade size="1">
        <hr style="MARGIN-TOP: -13px; COLOR: #000000" noshade size="4">
      </div>
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        <div id="PN" style="PAGE-BREAK-AFTER: always">
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OF CONTENTS</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 18pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Additional
Information and Where to Find It</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 18pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Participants
in the Solicitation</font></div>
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      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 18pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Item
3.01&#160;&#160;Notice of Delisting or Failure to Satisfy a Continued Listing
Rule or Standard; Transfer of Listing</font></div>
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8.01&#160;&#160;Other Events</font></div>
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9.01&#160;&#160;Financial Statements and Exhibits</font></div>
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      <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br>&#160;</div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">INFORMATION
TO BE INCLUDED IN THIS REPORT</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
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INFORMATION AND WHERE TO FIND IT</font></div>
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      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">THIS
CURRENT REPORT ON FORM 8-K IS BEING MADE IN CONNECTION WITH THE PROPOSED
ACQUISITION (THE &#8220;ACQUISITION&#8221;) AND RELATED TRANSACTIONS INVOLVING GHL
ACQUISITION CORP. (&#8220;GHQ&#8221;) AND IRIDIUM HOLDINGS LLC (&#8220;IRIDIUM
HOLDINGS&#8221;).&#160;&#160;IN CONNECTION WITH THE ACQUISITION, GHQ FILED WITH THE
SECURITIES EXCHANGE COMMISSION (&#8220;SEC&#8221;) A DEFINITIVE PROXY STATEMENT AND HAS
MAILED A DEFINITIVE PROXY STATEMENT AND OTHER RELEVANT DOCUMENTS TO GHQ&#8217;S
STOCKHOLDERS.&#160;&#160;THE INFORMATION CONTAINED IN THIS COMMUNICATION IS NOT
COMPLETE AND MAY BE CHANGED.&#160;&#160;BEFORE MAKING ANY VOTING OR INVESTMENT
DECISIONS, GHQ&#8217;S STOCKHOLDERS AND OTHER INTERESTED PERSONS ARE URGED TO READ
GHQ&#8217;S DEFINITIVE PROXY STATEMENT, AND ANY AMENDMENTS THERETO, IN CONNECTION WITH
GHQ&#8217;S SOLICITATION OF PROXIES FOR THE SPECIAL MEETING TO BE HELD TO APPROVE THE
ACQUISITION AND ANY OTHER RELEVANT DOCUMENTS FILED WITH THE SEC BECAUSE THEY
WILL CONTAIN IMPORTANT INFORMATION ABOUT IRIDIUM HOLDINGS, GHQ AND THE PROPOSED
ACQUISITION.&#160;&#160;THE DEFINITIVE PROXY STATEMENT WAS MAILED TO GHQ
STOCKHOLDERS OF RECORD AS OF AUGUST 27, 2009.&#160;&#160;STOCKHOLDERS AND OTHER
INTERESTED PERSONS WILL ALSO BE ABLE TO OBTAIN A COPY OF THE DEFINITIVE PROXY
STATEMENT, WITHOUT CHARGE, AT THE SEC&#8217;S WEB SITE AT HTTP://WWW.SEC.GOV OR BY
DIRECTING A REQUEST TO:&#160;&#160;MACKENZIE PARTNERS, INC. BY CALLING
800-322-2885.</font></div>
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      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">PARTICIPANTS
IN THE SOLICITATION</font></div>
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ITS DIRECTORS AND OFFICERS MAY BE DEEMED TO BE PARTICIPANTS IN THE SOLICITATION
OF PROXIES TO GHQ&#8217;S STOCKHOLDERS IN CONNECTION WITH THE
ACQUISITION.&#160;&#160;A LIST OF THE NAMES OF THOSE DIRECTORS AND OFFICERS AND
A DESCRIPTION OF THEIR INTERESTS IN GHQ IS CONTAINED IN GHQ&#8217;S REPORT ON FORM
10-K FOR THE FISCAL YEAR ENDED DECEMBER 31, 2008, AND GHQ&#8217;S DEFINITIVE PROXY
STATEMENT WHICH ARE FILED WITH THE SEC.&#160;&#160;GHQ&#8217;S STOCKHOLDERS MAY OBTAIN
ADDITIONAL INFORMATION ABOUT THE DIRECT AND INDIRECT INTERESTS OF THE
PARTICIPANTS IN THE ACQUISITION, BY SECURITY HOLDINGS OR OTHERWISE, BY READING
GHQ&#8217;S DEFINITIVE PROXY STATEMENT AND OTHER MATERIALS FILED OR TO BE FILED WITH
THE SEC WHEN SUCH INFORMATION BECOMES AVAILABLE.</font></div>
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IN THIS COMMUNICATION SHOULD BE CONSTRUED AS, OR IS INTENDED TO BE, A
SOLICITATION FOR OR AN OFFER TO PROVIDE INVESTMENT ADVISORY
SERVICES.</font></div>
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      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
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3.01 Notice of Delisting or Failure to Satisfy a Continued Listing Rule or
Standard; Transfer of Listing</font></div>
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      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 18pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">On
September 11, 2009, GHL Acquisition Corp. (&#8220;<font style="DISPLAY: inline; FONT-WEIGHT: bold">GHQ</font>&#8221;) issued a press release
announcing that it has submitted an application to list its common stock,
warrants and units, on the NASDAQ Stock Market (&#8220;<font style="DISPLAY: inline; FONT-WEIGHT: bold">Nasdaq</font>&#8221;), and expects to begin
trading on Nasdaq on September 24, 2009, under the symbols &#8220;IRDM,&#8221; &#8220;IRDMW&#8221; and
&#8220;IRDMU,&#8221; respectively.&#160;&#160;On September 11, 2009, GHQ provided written
notice to NYSE Alternext US LLC (&#8220;<font style="DISPLAY: inline; FONT-WEIGHT: bold">NYSE Amex</font>&#8221;) that GHQ expects
to voluntarily suspend trading of its common stock, warrants and units on the
NYSE Amex under the symbols &#8220;GHQ,&#8221; &#8220;GHQ.WS&#8221; and &#8220;GHQ.U,&#8221; respectively, on or
about September 23, 2009 (after the close of trading) and intends to transfer
its listing to Nasdaq, subject to the approval for listing on Nasdaq and the
approval of the acquisition of Iridium Holdings LLC by GHQ&#8217;s stockholders at its
special stockholder meeting currently scheduled for September 23,
2009.&#160;&#160;GHQ&#8217;s Board of Directors has approved the transfer to
Nasdaq.</font></div>
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the press release dated September 11, 2009 is attached hereto as Exhibit 99.1
and is incorporated herein by reference.</font></div>
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      <div style="DISPLAY: block; MARGIN-LEFT: 18pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Item
8.01 Other Events</font></div>
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3.01.</font></div>
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9.01&#160;&#160;Financial Statements and Exhibits</font></div>
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Exhibits.</font></div>
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    Amex</font></div>
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      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">SIGNATURES</font></div>
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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.</font></div>
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            <tr>
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              <td valign="top" width="12%"><font style="DISPLAY: inline; FONT-SIZE: 8pt; FONT-FAMILY: times new roman">&#160;</font></td>
              <td align="left" colspan="3" valign="top" width="34%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
              <td align="left" valign="top" width="12%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
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            <tr>
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              <td valign="top" width="12%"><font style="DISPLAY: inline; FONT-SIZE: 8pt; FONT-FAMILY: times new roman">&#160;</font></td>
              <td align="left" colspan="3" valign="top" width="34%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
              <td align="left" valign="top" width="12%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
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                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Date:</font></div>
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                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">By:</font></div>
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            </tr>
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              <td valign="top" width="6%"><font style="DISPLAY: inline; FONT-SIZE: 8pt; FONT-FAMILY: times new roman">&#160;
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              <td valign="top" width="36%"><font style="DISPLAY: inline; FONT-SIZE: 8pt; FONT-FAMILY: times new roman">&#160;
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              <td valign="top" width="12%"><font style="DISPLAY: inline; FONT-SIZE: 8pt; FONT-FAMILY: times new roman">&#160;
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              <td valign="top" width="6%"><font style="DISPLAY: inline; FONT-SIZE: 8pt; FONT-FAMILY: times new roman">&#160;
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              <td valign="top" width="36%"><font style="DISPLAY: inline; FONT-SIZE: 8pt; FONT-FAMILY: times new roman">&#160;
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              <td valign="top" width="12%"><font style="DISPLAY: inline; FONT-SIZE: 8pt; FONT-FAMILY: times new roman">&#160;
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              <td valign="top" width="6%"><font style="DISPLAY: inline; FONT-SIZE: 8pt; FONT-FAMILY: times new roman">&#160;
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      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#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">
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INDEX</font></div>
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<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>2
<FILENAME>dp14777_ex9901.htm
<DESCRIPTION>EXHIBIT 99.1
<TEXT>
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99.1</font></div>
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    <div style="DISPLAY: block; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 14pt; FONT-FAMILY: Times New Roman, serif">GHL
Acquisition Corp. Announces Expected Transfer of Listing to Nasdaq</font></div>
    <div style="DISPLAY: block; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25"><br></div>
    <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">NEW YORK,
September 11, 2009 &#8211; GHL Acquisition Corp. (&#8220;GHL Acquisition&#8221;) (NYX: GHQ, GHQ.WS
and GHQ.U) announced today that it has submitted an application to list its
common stock, warrants and units, and expects to begin trading, on the Nasdaq
Stock Market on September 24, 2009, under the symbols IRDM, IRDMW and IRDMU,
respectively.&#160;&#160;GHL Acquisition&#8217;s common stock, warrants and units will
continue to trade on the NYSE Amex under the symbols GHQ, GHQ.WS and GHQ.U,
respectively, through the end of the trading day on September 23,
2009.&#160;&#160;The expected transfer of GHL Acquisition&#8217;s listing and change
in symbol are taking place in connection with the proposed acquisition by GHL
Acquisition of Iridium Holdings LLC, which is subject to approval by the
stockholders of GHL Acquisition.&#160;&#160;A special meeting of GHL
Acquisition&#8217;s stockholders to vote on the acquisition has been scheduled for
September 23, 2009 at 4:00 p.m. Eastern Time.&#160;&#160;Immediately following
the closing of the proposed acquisition, GHL Acquisition will change its name to
Iridium Communications Inc.</font></div>
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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-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">About
GHL Acquisition Corp.</font></div>
    <div style="DISPLAY: block; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="left"><font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">GHL
Acquisition is a special purpose acquisition company launched in February 2008
in an initial public offering raising $400 million of gross proceeds. Founded by
Greenhill &amp; Co., GHL </font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Acquisition
was formed for the purpose of acquiring, or acquiring control of, through a
merger, capital stock exchange, asset acquisition, stock purchase,
reorganization or similar business combination, one or more businesses or
assets. It currently has no operating businesses.</font></font></div>
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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-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Forward-Looking
Statements and Other Disclosure</font></div>
    <div style="DISPLAY: block; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25"><br></div>
    <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">This
press release contains, and GHL Acquisition&#8217;s management may make, certain
&#8220;forward-looking statements&#8221; within the meaning of the Private Securities
Litigation Reform Act of 1995. The words &#8220;anticipates,&#8221; &#8220;may,&#8221; &#8220;can,&#8221;
&#8220;believes,&#8221; &#8220;expects,&#8221; &#8220;projects,&#8221; &#8220;intends,&#8221; &#8220;likely,&#8221; &#8220;will,&#8221; &#8220;to be&#8221; and
other expressions that are predictions of or indicate future events, trends or
prospects identify forward-looking statements. These forward-looking statements
involve known and unknown risks, uncertainties and other factors that may cause
the actual results, performance or achievements of GHL Acquisition to differ
materially from any future results, performance or achievements expressed or
implied by such forward-looking statements. These risks and uncertainties
include, but are not limited to, uncertainties regarding the timing of the
proposed transaction with Iridium, whether the transaction will be approved by
GHL Acquisition&#8217;s stockholders, whether the closing conditions will be satisfied
(including receipt of regulatory approvals), as well as industry and economic
conditions, and competitive, legal, governmental and technological factors.
There is no assurance that GHL Acquisition&#8217;s expectations will be realized. If
one or more of these risks or uncertainties materialize, or if GHL Acquisition&#8217;s
underlying assumptions prove incorrect, actual results may vary materially from
those expected, estimated or projected.&#160;&#160;GHL Acquisition&#8217;s
forward-looking statements speak only as of the date</font></div>
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    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; 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="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">of this
press release or as of the date they are made, and, except as required by law,
GHL Acquisition undertakes no obligation to update forward-looking
statements.</font></div>
    <div style="DISPLAY: block; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25"><br></div>
    <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">This
press release is for informational purposes only and does not constitute an
offer of any securities for sale.</font></div>
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