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$ SEC Filings

Filing Filed On
PURCHASE OF NS COMMON UNITS 06 Jun 2011
PURCHASE OF NS COMMON UNITS 27 May 2011
PURCHASE OF NS COMMON UNITS 12 May 2011
TRADE FOR TAXES RELATING TO VESTING 03 May 2011
TRADE FOR TAXES RELATING TO VESTING 03 May 2011
TRADE FOR TAXES RELATING TO VESTING 03 May 2011
GIFT OF NS COMMON UNITS 31 Mar 2011
PERFORMANCE UNIT VESTINGS 01 Feb 2011
PERFORMANCE UNIT VESTINGS 01 Feb 2011
PERFORMANCE UNIT VESTINGS 01 Feb 2011
PERFORMANCE UNIT VESTINGS 01 Feb 2011
PERFORMANCE UNIT VESTINGS 01 Feb 2011
PERFORMANCE UNIT VESTINGS 01 Feb 2011
PERFORMANCE UNIT VESTINGS 01 Feb 2011
PERFORMANCE UNIT VESTINGS 01 Feb 2011
RESTRICTED UNIT AWARDS-VEST 1/5 ANNUALLY 04 Jan 2011
RESTRICTED UNITS AWARDS - VEST 1/3 ANNUALLY 04 Jan 2011
RESTRICTED UNIT AWARDS - VEST 1/3 ANNUALLY 04 Jan 2011
RESTRICTED UNIT AWARDS - VEST 1/3 ANNUALLY 04 Jan 2011
RESTRICTED UNIT AWARDS - VEST 1/3 ANNUALLY 04 Jan 2011