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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1481506	Paa Natural Gas Storage Lp	PNG	Natural Gas Transmission (4922)	271679071

Insiders

Cik	Name	Reported Address	Director	Officer	Large Shareholder	Other
1070423	Plains All American Pipeline Lp	333 Clay Street, Suite 1600 Houston TX 77002	No	No	Yes	No
1490400	Paa Gp Llc	333 Clay Street, Suite 1600 Houston TX 77002	No	No	Yes	No
1490401	Plains Aap, L.p.	333 Clay Street, Suite 1600 Houston TX 77002	No	No	Yes	No
1490402	Plains All American Gp Llc	333 Clay Street, Suite 1600 Houston TX 77002	No	No	Yes	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Units	Disposition	2011-05-05	62,500	$0.00	28,210,370	No	4	X	Indirect	See Note
Common Units	Acquisiton	2011-05-05	3,828	$23.27	28,206,542	No	4	P	Indirect	See Note

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	X	Indirect	See Note
No	4	P	Indirect	See Note

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Units	Phantom Common Units	Disposition	2011-05-05	62,500	$0.00	62,500	$0.00

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
0	2011-05-05	2012-05-05	No	4	X	Indirect

Footnotes

1-for-1 common units of PNG for phantom units granted by PAA under Transaction Grant Agreements dated September 9, 2010.
PAA GP LLC, is the general partner of Plains All American Pipeline, L.P. ("PAA"), the record holder of the units. Plains AAP, L.P. owns all of the membership interests in PAA GP LLC and Plains All American GP LLC is the general partner of Plains AAP, L.P. Accordingly, Plains All American GP LLC, Plains AAP, L.P. and PAA GP LLC may be deemed to be indirect beneficial owners of any securities held by PAA. PAA is also the sole member of PNGS GP LLC, which is the general partner of the Issuer.
Units withheld for taxes.
Phantom Common Units granted by PAA to Greg L. Armstrong, Harry N. Pefanis and Al Swanson pursuant to Transaction Grant Agreements dated September 9, 2010.