Factbox: Key facts about some listed self-storage REITs

(Reuters) - Shares of self-storage companies have had a strong run this year on expectations of rising foreclosures boosting occupancy rates.

Solid fourth- and first-quarter results reassured investors about the resiliency of the sector, which had been hit by U.S. economic fears last year.

Following are some facts about listed self-storage real estate investment trusts in the United States:

Public Storage (PSA.N), Glendale, California

* Market cap - $14.71 billion

* Revenue - $1.82 billion for 2007

* FFO (Funds from Operation) - $4.78 a share for 2007

* Number of facilities - 2,012 self-storage facilities, 126 million net rentable square feet

* Stock performance - Risen about 31 percent from low of $65.66 on January 9, 2008.

Extra Storage Space Inc (EXR.N), Salt Lake City

* Market cap - $1.12 billion

* Revenue - $238.9 million for 2007

* FFO - $1.09 a share for 2007

* Number of facilities - 654 self-storage properties the properties comprise about 48 million square feet

* Stock performance - Risen about 36 percent from 52-week low of $12.33 on January 9, 2008.

Sovran Self Storage Inc (SSS.N), New York