Public Storage continues to reign as the world’s largest self-storage operator by square footage. The usual suspects round out the top ten.

But the new Top-Operators List for 2015 published by Inside Self-Storage also offers a glimpse into which independent operators have grown the the most since the last list was released a year ago.

Several operators also earned a spot on the list that were absent last year. The list ranks self-storage operators, both owners and management companies combined, by the number of square-footage they control.

Another notable change on this year’s list is that number six on the 2014 list ,SmartStop Self Storage, dropped down to number 32 as its portfolio is pending an acquisition by Extra Space Storage.

Below is an analysis of the list completed by the SpareFoot Storage Beat that identifies the companies that moved up the most spots in the ranking since last year:

*Square footage in millions

Several companies also made it on the list this year that were not on the list in 2014. Here they are below with their ranking on the current list of 100.

13. Life Storage
51. RHW Capital Management
52. Stor-it Self Storage
53. American West Management
60. Rosewood Property Co.
68. Self-Storage Management of California
71. Cox’s Armored Mini Storage Management
73. Extra Space Asia
79. Hide-AWay
82. Storage Zone
83. Andover Properties
93. Purely Storage
94. Century Storage

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Alexander Harris