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Iron Mountain
IRM

Name Holding Trade Value Shares
Change 		Change in
Stake
Capital World Investors
1
Capital World Investors
California
$621M +$816M +25,268,344 New
Vanguard Group
2
Vanguard Group
Pennsylvania
$295M +$387M +12,005,955 New
DSA
3
Davis Selected Advisers
Arizona
$260M +$341M +10,559,158 New
HCM
4
Highfields Capital Management
Massachusetts
$249M +$326M +10,105,789 New
SC
5
Schooner Capital
Florida
$230M +$302M +9,347,327 New
Parnassus Investments
6
Parnassus Investments
California
$190M +$249M +7,714,384 New
State Street
7
State Street
Massachusetts
$175M +$230M +7,129,391 New
Jennison Associates
8
Jennison Associates
New York
$137M +$180M +5,587,919 New
BIT
9
BlackRock Institutional Trust
California
$116M +$152M +4,704,800 New
BC
10
Brookfield Corp
Ontario, Canada
$107M +$14.1M +436,608 New
CGT
11
Capital Guardian Trust
California
$107M +$140M +4,342,487 New
Bank of New York Mellon
12
Bank of New York Mellon
New York
$101M +$133M +4,112,625 New
Neuberger Berman Group
13
Neuberger Berman Group
New York
$78.8M +$103M +3,203,301 New
RRAM
14
River Road Asset Management
Kentucky
$73.4M +$96.3M +2,983,864 New
T. Rowe Price Associates
15
T. Rowe Price Associates
Maryland
$71.2M +$93.5M +2,896,264 New
JHIU
16
Janus Henderson Investors US
Colorado
$70.2M +$92.1M +2,853,162 New
MCM
17
Munder Capital Management
Michigan
$66.6M +$87.5M +2,709,759 New
RIM
18
RS Investment Management
California
$63M +$82.7M +2,562,887 New
Northern Trust
19
Northern Trust
Illinois
$57.6M +$75.5M +2,340,253 New
Renaissance Technologies
20
Renaissance Technologies
New York
$54.7M +$71.8M +2,225,794 New
Invesco
21
Invesco
Georgia
$52.8M +$69.3M +2,146,195 New
Morgan Stanley
22
Morgan Stanley
New York
$51.9M +$68.1M +2,109,541 New
BFA
23
BlackRock Fund Advisors
California
$50.7M +$66.6M +2,062,852 New
Capital International Investors
24
Capital International Investors
California
$48.8M +$64.1M +1,986,273 New
MP
25
Makaira Partners
California
$44.8M +$58.9M +1,823,507 New
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