Schedule 13d

Filed by: SANDELL ASSET MANAGEMENT CORP
Subject Company: SOUTHERN UNION CO
Filed as of Date: 07/17/2008
View Original Filing on Edgar's
0000902664-08-002380.txt : 20080717
<SEC-HEADER>0000902664-08-002380.hdr.sgml : 20080717
<ACCEPTANCE-DATETIME>20080717084637
ACCESSION NUMBER:		0000902664-08-002380
CONFORMED SUBMISSION TYPE:	SC 13D/A
PUBLIC DOCUMENT COUNT:		3
FILED AS OF DATE:		20080717
DATE AS OF CHANGE:		20080717

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SOUTHERN UNION CO
		CENTRAL INDEX KEY:			0000203248
		STANDARD INDUSTRIAL CLASSIFICATION:	NATURAL GAS TRANSMISSION [4922]
		IRS NUMBER:				750571592
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13D/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-20968
		FILM NUMBER:		08956050

	BUSINESS ADDRESS:	
		STREET 1:		5444 WESTHEIMER RD
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77056-5306
		BUSINESS PHONE:		(713) 989-2000

	MAIL ADDRESS:	
		STREET 1:		5444 WESTHEIMER RD
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77056-5306

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SANDELL ASSET MANAGEMENT CORP
		CENTRAL INDEX KEY:			0001140474
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			E9

	FILING VALUES:
		FORM TYPE:		SC 13D/A

	BUSINESS ADDRESS:	
		STREET 1:		40 WEST 57TH STREET
		STREET 2:		26TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10019
		BUSINESS PHONE:		2126035700

	MAIL ADDRESS:	
		STREET 1:		40 WEST 57TH STREET
		STREET 2:		26TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10019
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13D/A
<SEQUENCE>1
<FILENAME>p08-1160sc13da.txt
<DESCRIPTION>SOUTHERN UNION COMPANY
<TEXT>
                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  -------------

                                  SCHEDULE 13D
                                 (Rule 13d-101)

             INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT
            TO RULE 13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO
                                  RULE 13d-2(a)

                    Under the Securities Exchange Act of 1934
                               (Amendment No. 6)*



                             Southern Union Company
- --------------------------------------------------------------------------------
                                (Name of Issuer)

                                  Common Stock
- --------------------------------------------------------------------------------
                         (Title of Class of Securities)

                                    844030106
- --------------------------------------------------------------------------------
                                 (CUSIP Number)

                         Sandell Asset Management Corp.
                               40 West 57th Street
                                   26th Floor
                               New York, NY 10019
                   Attention: Richard Gashler, General Counsel
                                  212-603-5700

                                 With a Copy to:
                              Marc Weingarten, Esq.
                              David Rosewater, Esq.
                            Schulte Roth & Zabel LLP
                                919 Third Avenue
                               New York, NY 10019
                                  212-756-2000
- --------------------------------------------------------------------------------
(Name, Address and Telephone Number of Person Authorized to Receive Notices and
                                 Communications)

                               July 17, 2008
                              ------------------
             (Date of Event which Requires Filing of this Statement)

If the filing person has previously filed a statement on Schedule 13G to report
the acquisition that is the subject of this Schedule 13D, and is filing this
schedule because of Rule 13d-1(e), 13d-1(f) or 13d-1(g), check the following box
[ ].

Note: Schedules filed in paper format shall include a signed original and five
copies of the schedule, including all exhibits. See Rule 13d-7 for other parties
to whom copies are to be sent.

                          (Continued on following pages)
                               (Page 1 of 12 Pages)

- --------------------
* The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter
disclosures provided in a prior cover page. The information required on the
remainder of this cover page shall not be deemed to be "filed" for the purpose
of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise
subject to the liabilities of that section of the Act but shall be subject to
all other provisions of the Act (however, see the Notes).


<PAGE>


- ----------------------------                        ----------------------------
CUSIP No.  844030106            SCHEDULE 13D/A      Page 2 of 12 Pages
- ----------------------------                        ----------------------------

- ------------- -----------------------------------------------------------------
     1        NAME OF REPORTING PERSON

              Castlerigg Master Investments Ltd.
- ------------- -----------------------------------------------------------------
     2        CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) |X|  (b) |_|
- ------------- -----------------------------------------------------------------
     3        SEC USE ONLY
- ------------- -----------------------------------------------------------------
     4        SOURCE OF FUNDS

              WC
- ------------- -----------------------------------------------------------------
     5        CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
              TO ITEMS 2(d) or 2(e)     |_|
- ------------- -----------------------------------------------------------------
     6        CITIZENSHIP OR PLACE OF ORGANIZATION

              British Virgin Islands
- ------------- -----------------------------------------------------------------
 NUMBER OF    7           SOLE VOTING POWER

   SHARES                 0
              ----------- -----------------------------------------------------
BENEFICIALLY  8           SHARED VOTING POWER

   OWNED                  11,271,414
              ----------- -----------------------------------------------------
  BY EACH     9           SOLE DISPOSITIVE POWER

 REPORTING                0
              ----------- -----------------------------------------------------
  PERSON      10          SHARED DISPOSITIVE POWER
                          11,271,414
   WITH
- ------------- ----------- -----------------------------------------------------
     11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

              11,271,414
- ------------- -----------------------------------------------------------------
     12       CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN
              SHARES |_|
- ------------- -----------------------------------------------------------------
     13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 11

              9.09%
- ------------- -----------------------------------------------------------------
     14       TYPE OF REPORTING PERSON

              CO
- ------------- -----------------------------------------------------------------


<PAGE>


- ----------------------------                        ----------------------------
CUSIP No.  844030106            SCHEDULE 13D/A      Page 3 of 12 Pages
- ----------------------------                        ----------------------------

- ------------- -----------------------------------------------------------------
     1        NAME OF REPORTING PERSON

              Sandell Asset Management Corp.
- ------------- -----------------------------------------------------------------
     2        CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) |X|  (b) |_|
- ------------- -----------------------------------------------------------------
     3        SEC USE ONLY
- ------------- -----------------------------------------------------------------
     4        SOURCE OF FUNDS

              AF
- ------------- -----------------------------------------------------------------
     5        CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
              TO ITEMS 2(d) or 2(e)     |_|
- ------------- -----------------------------------------------------------------
     6        CITIZENSHIP OR PLACE OF ORGANIZATION

              Cayman Islands
- ------------- -----------------------------------------------------------------
 NUMBER OF    7           SOLE VOTING POWER

   SHARES                 0
              ----------- -----------------------------------------------------
BENEFICIALLY  8           SHARED VOTING POWER

   OWNED                  12,250,714
              ----------- -----------------------------------------------------
  BY EACH     9           SOLE DISPOSITIVE POWER

 REPORTING                0
              ----------- -----------------------------------------------------
  PERSON      10          SHARED DISPOSITIVE POWER
                          12,250,714
   WITH
- ------------- ----------- -----------------------------------------------------
     11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

              12,250,714
- ------------- -----------------------------------------------------------------
     12       CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN
              SHARES |_|
- ------------- -----------------------------------------------------------------
     13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 11

              9.88%
- ------------- -----------------------------------------------------------------
     14       TYPE OF REPORTING PERSON

              CO
- ------------- -----------------------------------------------------------------


<PAGE>


- ----------------------------                        ----------------------------
CUSIP No.  844030106            SCHEDULE 13D/A      Page 4 of 12 Pages
- ----------------------------                        ----------------------------

- ------------- -----------------------------------------------------------------
     1        NAME OF REPORTING PERSON

              Castlerigg International Limited
- ------------- -----------------------------------------------------------------
     2        CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) |X|  (b) |_|
- ------------- -----------------------------------------------------------------
     3        SEC USE ONLY
- ------------- -----------------------------------------------------------------
     4        SOURCE OF FUNDS

              AF
- ------------- -----------------------------------------------------------------
     5        CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
              TO ITEMS 2(d) or 2(e)     |_|
- ------------- -----------------------------------------------------------------
     6        CITIZENSHIP OR PLACE OF ORGANIZATION

              British Virgin Islands
- ------------- -----------------------------------------------------------------
 NUMBER OF    7           SOLE VOTING POWER

   SHARES                 0
              ----------- -----------------------------------------------------
BENEFICIALLY  8           SHARED VOTING POWER

   OWNED                  11,271,414
              ----------- -----------------------------------------------------
  BY EACH     9           SOLE DISPOSITIVE POWER

 REPORTING                0
              ----------- -----------------------------------------------------
  PERSON      10          SHARED DISPOSITIVE POWER
                          11,271,414
   WITH
- ------------- ----------- -----------------------------------------------------
     11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

              11,271,414
- ------------- -----------------------------------------------------------------
     12       CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN
              SHARES |_|
- ------------- -----------------------------------------------------------------
     13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 11

              9.09%
- ------------- -----------------------------------------------------------------
     14       TYPE OF REPORTING PERSON

              CO
- ------------- -----------------------------------------------------------------


<PAGE>


- ----------------------------                        ----------------------------
CUSIP No.  844030106            SCHEDULE 13D/A      Page 5 of 12 Pages
- ----------------------------                        ----------------------------

- ------------- -----------------------------------------------------------------
     1        NAME OF REPORTING PERSON

              Castlerigg International Holdings Limited
- ------------- -----------------------------------------------------------------
     2        CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) |X|  (b) |_|
- ------------- -----------------------------------------------------------------
     3        SEC USE ONLY
- ------------- -----------------------------------------------------------------
     4        SOURCE OF FUNDS

              AF
- ------------- -----------------------------------------------------------------
     5        CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
              TO ITEMS 2(d) or 2(e)     |_|
- ------------- -----------------------------------------------------------------
     6        CITIZENSHIP OR PLACE OF ORGANIZATION

              British Virgin Islands
- ------------- -----------------------------------------------------------------
 NUMBER OF    7           SOLE VOTING POWER

   SHARES                 0
              ----------- -----------------------------------------------------
BENEFICIALLY  8           SHARED VOTING POWER

   OWNED                  11,271,414
              ----------- -----------------------------------------------------
  BY EACH     9           SOLE DISPOSITIVE POWER

 REPORTING                0
              ----------- -----------------------------------------------------
  PERSON      10          SHARED DISPOSITIVE POWER
                          11,271,414
   WITH
- ------------- ----------- -----------------------------------------------------
     11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

              11,271,414
- ------------- -----------------------------------------------------------------
     12       CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN
              SHARES |_|
- ------------- -----------------------------------------------------------------
     13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 11

              9.09%
- ------------- -----------------------------------------------------------------
     14       TYPE OF REPORTING PERSON

              CO
- ------------- -----------------------------------------------------------------


<PAGE>


- ----------------------------                        ----------------------------
CUSIP No.  844030106            SCHEDULE 13D/A      Page 6 of 12 Pages
- ----------------------------                        ----------------------------

- ------------- -----------------------------------------------------------------
     1        NAME OF REPORTING PERSON

              Castlerigg Global Select Fund Limited
- ------------- -----------------------------------------------------------------
     2        CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) |X|  (b) |_|
- ------------- -----------------------------------------------------------------
     3        SEC USE ONLY
- ------------- -----------------------------------------------------------------
     4        SOURCE OF FUNDS

              AF
- ------------- -----------------------------------------------------------------
     5        CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
              TO ITEMS 2(d) or 2(e)     |_|
- ------------- -----------------------------------------------------------------
     6        CITIZENSHIP OR PLACE OF ORGANIZATION

              Cayman Islands
- ------------- -----------------------------------------------------------------
 NUMBER OF    7           SOLE VOTING POWER

   SHARES                 0
              ----------- -----------------------------------------------------
BENEFICIALLY  8           SHARED VOTING POWER

   OWNED                  979,300
              ----------- -----------------------------------------------------
  BY EACH     9           SOLE DISPOSITIVE POWER

 REPORTING                0
              ----------- -----------------------------------------------------
  PERSON      10          SHARED DISPOSITIVE POWER
                          979,300
   WITH
- ------------- ----------- -----------------------------------------------------
     11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

              979,300
- ------------- -----------------------------------------------------------------
     12       CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN
                                   SHARES |_|
- ------------- -----------------------------------------------------------------
     13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 11

              0.8%
- ------------- -----------------------------------------------------------------
     14       TYPE OF REPORTING PERSON

              CO
- ------------- -----------------------------------------------------------------


<PAGE>


- ----------------------------                        ----------------------------
CUSIP No.  844030106            SCHEDULE 13D/A      Page 7 of 12 Pages
- ----------------------------                        ----------------------------

- ------------- -----------------------------------------------------------------
     1        NAME OF REPORTING PERSON

              CGS, Ltd.
- ------------- -----------------------------------------------------------------
     2        CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) |X|  (b) |_|
- ------------- -----------------------------------------------------------------
     3        SEC USE ONLY
- ------------- -----------------------------------------------------------------
     4        SOURCE OF FUNDS

              WC
- ------------- -----------------------------------------------------------------
     5        CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
              TO ITEMS 2(d) or 2(e)     |_|
- ------------- -----------------------------------------------------------------
     6        CITIZENSHIP OR PLACE OF ORGANIZATION

              Cayman Islands
- ------------- -----------------------------------------------------------------
 NUMBER OF    7           SOLE VOTING POWER

   SHARES                 0
              ----------- -----------------------------------------------------
BENEFICIALLY  8           SHARED VOTING POWER

   OWNED                  979,300
              ----------- -----------------------------------------------------
  BY EACH     9           SOLE DISPOSITIVE POWER

 REPORTING                0
              ----------- -----------------------------------------------------
  PERSON      10          SHARED DISPOSITIVE POWER
                          979,300
   WITH
- ------------- ----------- -----------------------------------------------------
     11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

              979,300
- ------------- -----------------------------------------------------------------
     12       CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN
              SHARES |_|
- ------------- -----------------------------------------------------------------
     13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 11

              0.8%
- ------------- -----------------------------------------------------------------
     14       TYPE OF REPORTING PERSON

              CO
- ------------- -----------------------------------------------------------------


<PAGE>


- ----------------------------                        ----------------------------
CUSIP No.  844030106            SCHEDULE 13D/A      Page 8 of 12 Pages
- ----------------------------                        ----------------------------

- ------------- -----------------------------------------------------------------
     1        NAME OF REPORTING PERSON

              Castlerigg GS Holdings, Ltd.
- ------------- -----------------------------------------------------------------
     2        CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) |X|  (b) |_|
- ------------- -----------------------------------------------------------------
     3        SEC USE ONLY
- ------------- -----------------------------------------------------------------
     4        SOURCE OF FUNDS

              AF
- ------------- -----------------------------------------------------------------
     5        CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
              TO ITEMS 2(d) or 2(e)     |_|
- ------------- -----------------------------------------------------------------
     6        CITIZENSHIP OR PLACE OF ORGANIZATION

              Cayman Islands
- ------------- -----------------------------------------------------------------
 NUMBER OF    7           SOLE VOTING POWER

   SHARES                 0
              ----------- -----------------------------------------------------
BENEFICIALLY  8           SHARED VOTING POWER

   OWNED                  979,300
              ----------- -----------------------------------------------------
  BY EACH     9           SOLE DISPOSITIVE POWER

 REPORTING                0
              ----------- -----------------------------------------------------
  PERSON      10          SHARED DISPOSITIVE POWER
                          979,300
   WITH
- ------------- ----------- -----------------------------------------------------
     11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

              979,300
- ------------- -----------------------------------------------------------------
     12       CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN
              SHARES |_|
- ------------- -----------------------------------------------------------------
     13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 11

              0.8%
- ------------- -----------------------------------------------------------------
     14       TYPE OF REPORTING PERSON

              CO
- ------------- -----------------------------------------------------------------

<PAGE>


- ----------------------------                        ----------------------------
CUSIP No.  844030106            SCHEDULE 13D/A      Page 9 of 12 Pages
- ----------------------------                        ----------------------------

- ------------- -----------------------------------------------------------------
     1        NAME OF REPORTING PERSON

              Thomas E. Sandell
- ------------- -----------------------------------------------------------------
     2        CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) |X|  (b) |_|
- ------------- -----------------------------------------------------------------
     3        SEC USE ONLY
- ------------- -----------------------------------------------------------------
     4        SOURCE OF FUNDS

              AF
- ------------- -----------------------------------------------------------------
     5        CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
              TO ITEMS 2(d) or 2(e)     |_|
- ------------- -----------------------------------------------------------------
     6        CITIZENSHIP OR PLACE OF ORGANIZATION

              Sweden
- ------------- -----------------------------------------------------------------
 NUMBER OF    7           SOLE VOTING POWER

   SHARES                 0
              ----------- -----------------------------------------------------
BENEFICIALLY  8           SHARED VOTING POWER

   OWNED                  12,250,714
              ----------- -----------------------------------------------------
  BY EACH     9           SOLE DISPOSITIVE POWER

 REPORTING                0
              ----------- -----------------------------------------------------
  PERSON      10          SHARED DISPOSITIVE POWER
                          12,250,714
   WITH
- ------------- ----------- -----------------------------------------------------
     11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

              12,250,714
- ------------- -----------------------------------------------------------------
     12       CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN
              SHARES |_|
- ------------- -----------------------------------------------------------------
     13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 11

              9.88%
- ------------- -----------------------------------------------------------------
     14       TYPE OF REPORTING PERSON

              IN
- ------------- -----------------------------------------------------------------


<PAGE>

- ----------------------------                        ----------------------------
CUSIP No.  844030106            SCHEDULE 13D/A      Page 10 of 12 Pages
- ----------------------------                        ----------------------------

This Amendment No.6 is filed with respect to the shares of the common stock, par
value $1.00 per share (the "Common Stock"), of Southern Union Company, a
Delaware corporation (the "Issuer"), beneficially owned by the Reporting Persons
(as defined below) as of July 16, 2008 and amends and supplements the Schedule
13D, as heretofore amended (the "Schedule 13D"). Except as set forth herein, the
Schedule 13D is unmodified.

ITEM 3. SOURCE AND AMOUNT OF FUNDS OR OTHER CONSIDERATION

Item 3 of the Schedule 13D is amended and restated in the entirety as follows:

Funds for the purchase of the shares of Common Stock reported herein to be held
by Castlerigg Master Investments and CGS were derived from their respective
general working capital and margin account borrowings made in the ordinary
course of business. A total of approximately $356,162,684 (including
commissions) was paid to acquire the shares of Common Stock reported herein.

ITEM 4.       PURPOSE OF TRANSACTION

Item 4 of the Schedule 13D is hereby amended by the addition of the following
immediately preceding the penultimate paragraph thereof:

        On July 17, 2008, SAMC sent a letter to George Lindemann, Chairman and
CEO of the Issuer (the "July 2008 Letter"). The July 2008 Letter expressed
serious concern regarding management's and the Board of Director's failure to
achieve the goals of the Issuer's 2007 strategic plan, which was the basis for
SAMC agreeing to withdraw its nominees for the Company's Board of Directors at
the 2006 annual meeting of stockholders. Furthermore, the July 2008 Letter
identifies this lack of action by the Issuer as the driver of its continued poor
stock price performance on both an absolute and relative basis. SAMC now
believes that the best alternative for shareholders is an immediate sale of the
Issuer. In the event that the Company continues to underperform and management
and the board do not take material action to deliver value to the shareholders,
SAMC may seek to replace some or all of the existing board members with a new
slate of highly qualified candidates and has begun the process of identifying
these candidates. The foregoing description of the July 2008 Letter is a summary
only and is qualified in its entirety by reference to the July 2008 Letter,
which is attached hereto as Exhibit H. A copy of a related press release issued
on July 17, 2008, announcing sending of the July 2008 Letter to the Issuer, is
attached hereto as Exhibit I, and is similarly incorporated herein by reference.

ITEM 5.     INTEREST IN SECURITIES OF THE ISSUER

Item 5 of the Schedule 13D is amended and restated in the entirety as follows:

      (a) Each of Castlerigg Master Investments, SAMC, Castlerigg International,
Castlerigg Holdings and Sandell may be deemed to beneficially own the 11,271,414
shares of Common Stock held by Castlerigg Master Investments, representing
approximately 9.09% of the outstanding shares of Common Stock. Each of CGS,
CGSH, Castlerigg Global Select, SAMC and Sandell may be deemed to beneficially
own the 979,300 shares of Common Stock held by CGS, representing approximately
0.8% of the outstanding shares of Common Stock. The Reporting Persons may be
deemed to be a "group," which "group" may be deemed to beneficially own an
aggregate of 12,250,714 shares of Common Stock, representing approximately 9.88%
of the outstanding shares of Common Stock. The percentages used herein are based
upon the 124,003,265 shares of Common Stock reported to be outstanding as of May
2, 2008 by the Issuer in its quarterly report on Form 10-Q for the period ended
March 31, 2008, filed with the Securities and Exchange Commission on May 9,
2008.

      (b) None of the Reporting Persons has sole power to vote or direct the
vote or sole power to dispose or direct the disposition of shares of Common
Stock. Each of Castlerigg Master Investments, SAMC, Castlerigg International,
Castlerigg Holdings and Sandell has shared power to vote or direct the vote and
shared power to dispose or direct the disposition of the 11,271,414 shares of
Common Stock held by Castlerigg Master Investments. Each of CGS, CGSH,
Castlerigg Global Select, SAMC and Sandell has shared power to vote or direct

<PAGE>


- ----------------------------                        ----------------------------
CUSIP No.  844030106            SCHEDULE 13D/A      Page 11 of 12 Pages
- ----------------------------                        ----------------------------

the vote and shared power to dispose or direct the disposition of the 979,300
shares of Common Stock held by CGS.

      (c) Information concerning transactions in the shares of Common Stock
that were effected by the Reporting Persons during the past sixty days is set
forth on Appendix I.

      (d) No person other than Castlerigg Master Investments, SAMC, Castlerigg
International, Castlerigg Holdings and Sandell is known to have the right to
receive or the power to direct the receipt of dividends from, or the proceeds
from the sale of, the shares of Common Stock held by Castlerigg Master
Investments. No person other than CGS, CGSH, Castlerigg Global Select, SAMC and
Sandell is known to have the right to receive or the power to direct the receipt
of dividends from, or the proceeds from the sale of, the shares of Common Stock
held by CGS.

      (e) Not Applicable.

ITEM 7.       MATERIAL TO BE FILED AS EXHIBITS

Item 7 of the Schedule 13D is hereby amended and supplemented as follows:

APPENDIX I:     Transactions Effected During the Past Sixty Days

EXHIBIT H:      Letter from certain of the Reporting Persons to George
                Lindemann, Chairman and Chief Executive Officer of Southern
                Union Company, dated July 16, 2008

EXHIBIT I:      Press Release, dated July 17, 2008


<PAGE>


- ----------------------------                        ----------------------------
CUSIP No.  844030106            SCHEDULE 13D/A      Page 12 of 12 Pages
- ----------------------------                        ----------------------------


                                    Signature

     After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this statement is true, complete and
correct.

     Dated: July 17, 2008

            CASTLERIGG MASTER INVESTMENTS LTD.
            By: Sandell Asset Management Corp.,
                its Investment Manager

            By: /s/ Thomas E. Sandell
                ---------------------
                Thomas E. Sandell, Chief Executive Officer


            SANDELL ASSET MANAGEMENT CORP.

            By: /s/ Thomas E. Sandell
                ---------------------
                Thomas E. Sandell, Chief Executive Officer


            CASTLERIGG INTERNATIONAL LIMITED
            By: Sandell Asset Management Corp.,
                its Investment Manager

            By: /s/ Thomas E. Sandell
                ---------------------
                Thomas E. Sandell, Chief Executive Officer


            CASTLERIGG INTERNATIONAL HOLDINGS LIMITED
            By: Sandell Asset Management Corp.,
                its Investment Manager

            By: /s/ Thomas E. Sandell
                ---------------------
                Thomas E. Sandell, Chief Executive Officer


            CASTLERIGG GLOBAL SELECT FUND LIMITED
            By: Sandell Asset Management Corp.,
                its Investment Manager

            By: /s/ Thomas E. Sandell
                ---------------------
                Thomas E. Sandell, Chief Executive Officer


            CGS, LTD.
            By: Sandell Asset Management Corp.,
                its Investment Manager

            By: /s/ Thomas E. Sandell
                ---------------------
                Thomas E. Sandell, Chief Executive Officer



            CASTLERIGG GS HOLDINGS, LTD.
            By: Sandell Asset Management Corp.,
                its Investment Manager

            By: /s/ Thomas E. Sandell
                ---------------------
                Thomas E. Sandell, Chief Executive Officer


            /s/ Thomas E. Sandell
            ---------------------
             Thomas E. Sandell

<PAGE>


                                         APPENDIX I
                      TRANSACTIONS EFFECTED DURING THE PAST SIXTY DAYS

(All regular market transactions were effected on the New York Stock Exchange)


- ----------------------------------------------------
                          Amount of
   Date of      Person    securities     Price per
 transaction   effecting  Bought/ (Sold) share or
              transaction                  unit

- ----------------------------------------------------

05/27/08     CMI             250,000      26.42
- ----------------------------------------------------

05/28/08     CMI             150,000      26.43
- ----------------------------------------------------

05/30/08     CMI             100,000      26.41
- ----------------------------------------------------


</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99
<SEQUENCE>2
<FILENAME>p08-1160exhibith.txt
<DESCRIPTION>EXHIBIT H
<TEXT>
                                   EXHIBIT H


                            SANDELL ASSET MANAGEMENT
                           -------------------------
                             CASTLERIGG INVESTMENTS


July 16, 2008

Southern Union Company
5444 Westheimer Road
Houston, TX 77056
Attn: George Lindemann, Chairman and Chief Executive Officer

Dear George:

As you are well aware by now, Sandell Asset Management ("Sandell") has been a
shareholder of Southern Union Company ("Southern Union", "SUG" or the "Company")
for over three years and we remain your largest single shareholder. We purchased
the shares because we believed the value of the Company's assets were well in
excess of its stock price, and subsequently were even convinced that management
was dedicated to realizing that value. We also believed that you, Mr. Lindemann,
would be willing to sell the Company if you could not deliver that value in a
reasonable timeframe. The record now clearly shows that our patience was
misplaced. During the past few years shareholders have witnessed the following:

1.    Continued and consistent underperformance in SUG's share price relative to
      its peers. In fact, we have recently seen this performance gap widen even
      further
2.    A consistent exodus of management talent replaced with less qualified
      internal candidates
3.    Generous compensation for the most senior executives not tied to operating
      performance or share price
4.    Broken promises to investors and analysts that have dramatically eroded
      management's credibility
5.    An inability to communicate and execute a concrete plan for value
      enhancement

We believe the poor and declining share price performance is a clear sign that
the market has utterly lost confidence in the Company's leadership.

In 2006, we initiated a proxy contest to elect director candidates in an effort
to improve the Board's qualifications, add new perspectives, and foster a new
urgency to drive shareholder value. We agreed to withdraw those nominees in view
of the stated intentions in your February 2007 Strategic Plan to engage in
several value enhancement initiatives including the creation of an MLP and the
opportunistic return of capital to shareholders. Thus far, none of those goals
have been met in substance, and we strongly question your level of actual
commitment to them in the first place.


<PAGE>


July 16, 2008
Page 2


<TABLE>
<CAPTION>
<S>                             <C>              <C>       <C>          <C>          <C>
- -------------------------------------------------------------------------------------------------
Total Shareholders Return
                                2005          2006        2007       2008 YTD    2005-Current
                              -------------------------------------------------------------------
Spectra Energy Corp              NA            NA        (3.6%)       7.7%            NA
El Paso Corp                    18.6%          27.1%     14.0%       14.0%          153.6%
ONEOK Inc.                      (2.8%)         67.8%      6.9%        8.0%          151.9%
Williams Cos Inc.               44.0%          14.4%     38.7%        2.2%          289.7%
Equitable Resources Inc         24.1%          16.5%     29.9%       20.9%          230.4%
Sempra Energy                   25.6%          28.1%     12.7%       (8.5%)         108.2%
National Fuel Gas Co            14.3%          27.7%     24.5%       24.5%          173.6%
                              -------------------------------------------------------------------
Average                         20.6%          30.3%     17.6%        9.8%          184.6%

Southern Union Co                3.5%          20.1%      6.6%      (12.5%)          58.6%

Note:  As of 7/11/08

- -------------------------------------------------------------------------------------------------

</TABLE>


With regards to the MLP, you indicated that you intended to complete an IPO by
the end of the third quarter of 2007. It has been 498 days since the withdrawal
of our nominees and we have yet to even see an S-1 filing. Notwithstanding the
disruptions in the capital markets recently, there were ample opportunities for
SUG to complete an offering prior to the current market slowdown had the Company
moved with real urgency and commitment. In fact, even as recently as this past
May when the tightening of the capital markets was already well underway,
Anadarko Petroleum successfully priced a midstream MLP IPO at a yield of 7.3% -
the very same transaction that SUG's new Chief Operating Officer, Eric
Herschmann, cited on the last earnings call.

In the table below, you will note that several companies were able to announce,
file and successfully price MLPs since you announced your Strategic Plan.
History shows that companies dedicated to creating shareholder value find ways
to do so regardless of market conditions.

<TABLE>
<CAPTION>
<S>                <C>   <C>    <C>  <C> <C>  <C>    <C>   <C>   <C>   <C>  <C>    <C>   <C>  <C>   <C>  <C>    <C>  <C>   <C>   <C>
                                    DAYS FROM INITIAL ANNOUNCEMENT
         INITIAL   -----------------------------------------------------------------------------------------------------------------
         ANN.      0     30     60   90  120   180   210   240   270   300   330   360   390   420  450   480   510  540   570   600
APC    10/15/2007  Filed S-1                         Pricing
PXD     4/23/2007                    Filed S-1             Delay                         Pricing
EAC     1/17/2007                        Filed S-1         Pricing
WMZ     7/20/2007               Filed S-1      Pricing
EPB     2/21/2007                                    Filed S-1   Pricing

SUG     2/28/2007                    Postponed Storage           Ann. Midstream                     Postpones Midstream

</TABLE>


The Company's track record of capital return is only slightly better. Since you
announced your Strategic Plan, SUG has not repurchased a single share of stock,
despite the trading price recently hitting a low not seen since January 2005. We
acknowledge that SUG did raise the quarterly dividend by close to 50% - however,
this exaggerated increase was off a miniscule base of 10 cents per share.

Further testament to the market's lack of confidence in SUG, is the stock's
discounted multiple and gap to its NAV. The price discount to a pro forma MLP
valuation is particularly striking and a strong sign that both investors and
sell-side analysts do not believe that the Company's board and/or management
will follow through on an MLP. It raises significant concerns about


<PAGE>


July 16, 2008
Page 3

complacency around value creation when such compelling opportunities are
available. We dispute your frequently offered excuse that an MLP does not create
value due to tax leakage, as it is well known that there are numerous structures
available that mitigate tax leakage and defer tax payments. We do not subscribe
to any theory that SUG is in such a unique position to justify holding
MLP-eligible assets in a fully taxable form while virtually every other
midstream and/or pipeline company has moved aggressively to sell or convert
these assets into MLPs to the benefit of shareholders.

<TABLE>
<CAPTION>
<S>                   <C>   <C>       <C>    <C>                           <C>


                            TEV     MLP Sub(s)            Name                            Recent Dropdowns
                           -------- ---------- ------------------------------ ---------------------------------------
ONEOK INC             OKE   $10,138   OKS      ONEOK PARTNERS LP              Apr. 06 - $3bn
WILLIAMS COS INC      WMB   $27,794   WPZ      WILLIAMS PARTNERS LP           Aug. 05 - $124mm IPO, $317 mm asset
                                                                              Jun. 06 - $360mm
                                                                              Nov. 06 - $1.2bn
                                                                              Jun. 07 - $78mm
                                                                              Dec. 07 - $750mm
                                      WMZ      WILLIAMS PIPELINE PARTNERS L   Jan. 08 - $358mm IPO for $718mm asset
DUKE ENERGY CORP      DUK   $33,610   DPM      DCP MIDSTREAM PARTNERS LP      Nov. 06 - $77mm
                                                                              Jul. 07 - $271mm
                                                                              Aug. 07 - $166mm ($635mm total)
SPECTRA ENERGY CORP   SE    $27,090   SEP      SPECTRA ENERGY PARTNERS LP     Jul. 07 - $230mm IPO for $550mm asset
                                                                              Dec. 07 - $107mm
EL PASO CORP          EP    $27,231   EPB      EL PASO PIPELINE PARTNERS LP   Nov. 07 - $537mm IPO for $962mm asset

</TABLE>


At this point, we do not have any faith that management or the board of
directors harbor any real intention of moving forward actively with an MLP or
other value enhancing restructuring alternatives. Even if our continued
insistence does result in a meager MLP IPO of the former Sid Richardson assets,
we have no confidence that you will move aggressively to drop the remaining
assets into the MLP over a reasonable timeframe. While virtually all of the
Company's assets qualify for the MLP structure, only a real and disciplined
commitment to follow through on the conversion process will maximize value.
Unfortunately, we have no indication that such commitment exists at SUG. In
fact, on the last earnings call, you suggested that SUG might even be interested
in PURCHASING more midstream assets. We are shocked that you would even consider
acquisitions given SUG's weak stock currency and the existing limitations your
current debt load puts on the Company's strategic options. Further, you would
likely be bidding against existing MLPs that have stronger currency, virtually
assuring that you would be overpaying for the assets. For these reasons, among
others, we strongly oppose any acquisitions.


<PAGE>


July 16, 2008
Page 4

<TABLE>
<CAPTION>
<S>                               <C>                   <C>                  <C>     <C>


         Firm Name                      Analyst             Rating           Target                   Commentary
- -------------------------------- -------------------------- ---------------- ------- -----------------------------------------------
Wachovia Capital Markets LLC     SAMUEL BROTHWELL       market perform       $27.50  "... we are revising our valuation range down
                                                                                     to reflect: 1) the MLP delay, and--more
                                                                                     importantly--2) to reflect a lower level
                                                                                     of confidence that this management team
                                                                                     will act to optimize shareholder value
                                                                                     in a timely fashion. Part of the reason
                                                                                     to own SUG was that CEO George Lindermann
                                                                                     is seen as a value / deal guy. But at his
                                                                                     insistence, the MLP was kept at bay until
                                                                                     it withered on the vine. SUG is a public
                                                                                     company, not a family business, management's
                                                                                     lack of urgency is disturbing, and we can't
                                                                                     just keep on waiting, waiting for the world
                                                                                     to change."

BMO Capital Markets-US           CARL L KIRST           outperform           $35.00  "... at some point in the furture ... value
                                                                                     will get recognized via either MLP creation,
                                                                                     future stock buyback, asset optimization, or
                                                                                     even an outright sale for the right price."

RBC Capital Markets              LASAN JOHONG           sector perform       $29.00  "While we do not believe this is the optimal
                                                                                     strategy [for SUG to form a new MLP], and
                                                                                     would have preferred SUG sell to another MLP
                                                                                     and focus its strategy on its core LNG,
                                                                                     transportation and distribution business,
                                                                                     we do believe the formation of an MLP could
                                                                                     create shareholder value."

Banc of America                  ELVIRA SCOTTO          neutral              $30.00  "Management has acknowledged recent incremental
                                                                                     market liquidity ... Becoming more constructive
                                                                                     on the shares ... However, with the midstream
                                                                                     MLP shelved for the time being, we do not see
                                                                                     any near-term catalyst to drive the shares
                                                                                     meaningfully higher from current levels."

Citigroup                        FAISEL KHAN            buy                  $37.00  "Our NAV analysis results in a value of $36.83
                                                                                     per share ... [but] we also attribute no MLP
                                                                                     valuation uplift to SUG"

JPMorgan                         XIN LIU/GLENN MULLIN   overweight                   "Longer term, we continue to believe an MLP
                                                                                     makes sense as part of the company's stragegy."

Calyon Securities (USA) Inc      GORDON HOWALD          buy                  $41.00  "We constantly hear criticism from investors
                                                                                     about Southern Union's preceived lack of
                                                                                     shareholder focus, particularly management
                                                                                     access."

Stifel Nicolaus                  SELMAN AKYOL           buy                  $32.00  "We do not expect that the company will move
                                                                                     forward with a G&P MLP at this time"

Lehman Brothers                  RICHARD GROSS          overwt/neutral       $33.00

</TABLE>


Since management has yet to offer, much less enact, a substantive value creation
plan, WE BELIEVE THAT THE ONLY VIABLE OPTION FOR VALUE CREATION IS A SALE OF THE
COMPANY.

Despite the poor performance of the equity markets, we are confident there would
be significant interest in a transaction and note that the share prices of
virtually all of SUG's competitors (and possible acquirers) are up materially
this year on both relative and absolute bases. We were told that SUG had
received offers for the Company during the last two years but walked away from a
potential deal over 50 cents (or less) on the proposed stock purchase price.


<PAGE>


July 16, 2008
Page 5


Strongly supportive of the potential sale price is the value that can be
realized through a proactive execution of an MLP conversion. On this basis we
believe SUG is worth between $32-$42 per share depending on the sequence of
particular assets contributed, the prevailing market environment and the level
of tax mitigation. This valuation is well supported by sell-side research which
often have a wide variance between SUG's target price in the status quo, and the
Company's materially higher MLP or sum-of-the-parts valuations. We believe this
gap represents a material "credibility discount" for SUG's management as the
Company's operating assets have significantly greater strategic value. As such,
we believe that an acquirer would be willing to pay between $35-$40 for SUG and
still generate attractive returns from cutting costs and dropping assets into
its own MLP.


<TABLE>
<CAPTION>
<S>                         <C>      <C>       <C>           <C>                        <C>       <C>       <C>

Sum of the Parts Valuation                                   Sum of the Parts Sale
- --------------------------                                   ----------------------

                            2008E              Value                                     2008E               Value
                            EBITDA  Multiple   per Shr                                   EBITDA   Multiple   per Shr
                            ------  ---------  --------                                   ------  ---------  --------
Transportation & Storage      $593      8.7x    $41.41       Transportation & Storage      $593      9.5x    $45.39
Gathering & Processing        $189      8.5x    $12.91       Gathering & Processing        $189      9.0x    $13.67
Gas Distribution              $111      8.0x     $7.16       Gas Distribution              $111      8.0x     $7.16
Corporate                       $2      7.0x     $0.12       Corporate                       $2      7.0x     $0.12
- -------------------------------------------------------      --------------------------------------------------------
Total TEV                     $895      8.5x    $61.60       Total TEV                     $895      9.2x    $66.35
Net Debt                                        $28.93       Net Debt                                        $28.93
- ------------------------------------------------------       --------------------------------------------------------
Equity Value                                    $32.68       Equity Value                                    $37.42
- -------------------------------------------------------      --------------------------------------------------------
Upside %                                         28.2%       Upside %                                         46.8%

</TABLE>


<TABLE>
<CAPTION>
<S>                               <C>                                            <C>       <C>


                                 Summary MLP Valuation
                                 ---------------------
                                                                                  TEV     Per Shr
                                                                                -------- ---------
                                 Full Midstream & Pipeline/LNG MLP
                                 ---------------------------------
                                 NPV of IPO Proceeds & Dropdown Proceeds         $2,287   $18.42
                                 Value of GP Distributions                       $2,143   $17.26
                                 Value of Subordinated LP Distributions          $3,468   $27.93
                                 Legacy Assets Value                               $905    $7.29
                                 ----------------------------------------------------------------
                                 Total TEV                                       $8,803   $70.90
                                 Net Debt                                       ($3,592) ($28.93)
                                 ----------------------------------------------------------------
                                 Equity Value                                    $5,211   $41.97
                                 ----------------------------------------------------------------
                                 Upside %                                                  64.7%


</TABLE>



<PAGE>


July 16, 2008
Page 6



The market has no more patience with management's poor performance, outsized
compensation and complacency towards value creation. This belief is clearly
supported by the dismal share price performance and the Company's discounted
public valuation. We believe the option that creates the most value for
shareholders at this point is an immediate sale of the Company. On this basis,
we strongly recommend that the Company retain a financial advisor. However, if
SUG were to remain independent, there would need to be a significant
restructuring of the Company which would include the following at a minimum:

1.    Separation of the Chairman and CEO roles, and recruitment of an
      experienced energy CEO. This candidate would then evaluate and fill out
      other senior executive roles where appropriate
2.    A detailed plan and public commitment to converting all of the
      Transportation/Storage and Gathering & Processing assets into one or even
      separate MLPs
3.    Commitment to a minimum level of capital return to shareholders
4.    Replacement of a majority of the existing board with truly qualified
      candidates who have relevant experience and no ties to management

In conclusion, the market has clearly shown that our decision to not seek
representation on the board two years ago in reliance upon your hollow
commitment was a mistake. Ample time has elapsed and opportunities squandered by
the Company, and we no longer have the appetite for false promises and delaying
tactics offered in the hope that we will go away. While there is still some time
before the next opportunity to nominate candidates in December, we have begun
the process of searching for qualified candidates because we believe that
nothing will meaningfully change in the next several months.


Yours truly,



Thomas Sandell
Chief Executive Officer
Sandell Asset Management Corp.









</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99
<SEQUENCE>3
<FILENAME>p08-1160pressrelease.txt
<DESCRIPTION>PRESS RELEASE
<TEXT>
                                    EXHIBIT I


FOR IMMEDIATE RELEASE                                             PRESS RELEASE


   SANDELL SENDS A LETTER TO SOUTHERN UNION CHAIRMAN AND CEO GEORGE LINDEMANN
  EXPRESSING CONCERN OVER POOR SHARE PRICE PERFORMANCE AND FAILURE TO COMPLETE
                          GOALS OF 2007 STRATEGIC PLAN

                   SANDELL SEEKS IMMEDIATE SALE OF THE COMPANY

  SANDELL HAS BEGUN PROCESS OF IDENTIFYING CANDIDATES FOR SOUTHERN UNION BOARD
                                  OF DIRECTORS

NEW YORK, JULY 17, 2008 -Sandell Asset Management Corp. ("Sandell"), the largest
individual  shareholder of Southern Union Company ("SUG" or the "Company")  with
ownership  of 9.9% of shares  outstanding,  sent a letter  to George  Lindemann,
Chairman and CEO of SUG.  This letter,  which was also filed with the SEC today,
expressed  serious concern  regarding  management's  and the Board of Directors'
failure to achieve the goals of its 2007 strategic plan, which was the basis for
Sandell  agreeing to withdraw its nominees for the Company's  Board of Directors
at the 2006 annual meeting of stockholders.  Furthermore,  the letter identifies
this lack of action by the  company  as the driver of its  continued  poor stock
performance  on both an absolute  and  relative  basis.  That plan  specifically
stated  goals of forming  an MLP by the end of the third  quarter of 2007 and an
increased focus on return of capital to shareholders. Sandell believes there was
ample time before the recent  disruption in the capital  markets to achieve both
of these goals and credits the failure with a lack of  conviction  in management
and at the board level.  Sandell now believes that SUG's best  alternative is an
immediate  sale of the Company  given likely  interest  from  several  strategic
buyers and robust fundamental  environments in the Company's end markets. In the
event that the Company continues to underperform and management and the Board do
not take material action to deliver value to the shareholders,  Sandell may seek
to replace some or all of the existing  board members with a new slate of highly
qualified  candidates.  Sandell has  recently  begun the process of  identifying
these candidates.

Tom Sandell,  the CEO of Sandell  stated "We have been holders of Southern Union
for over three years now and took  management at their word that they would take
action to enhance  shareholder value. Our patience has not been rewarded and we,
along  with  other   shareholders,   have  witnessed  a  consistent   record  of
underperformance   and  complacency   toward  shareholder  value.  Our  research
indicates  that these  shares  should be worth at least $32 per share and likely
greater than $40 per share in the hands of a qualified,  appropriately motivated
team dedicated to driving value. We believe that our fellow  shareholders  share
our frustration  and we will continue to seek whatever  changes are necessary to
realize full value for this impressive collection of assets. "

For further information, contact:

Mr. Tom Sandell
Chief Executive Officer
Sandell Asset Management Corp.
(212) 603-5700

Sandell Asset  Management  Corp.  is a  multi-billion  dollar global  investment
management firm, founded by Thomas E. Sandell, which focuses on global corporate
events and  restructurings  throughout North America,  Continental  Europe,  the
United Kingdom, Latin America and the Asia-Pacific theatres.  Sandell frequently
will take an "active  involvement"  in  facilitating  financial or  organization
improvements accruing to the benefit of investors.
</TEXT>
</DOCUMENT>