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Iron Mountain

994 hedge funds and large institutions have $21.1B invested in Iron Mountain in 2025 Q1 according to their latest regulatory filings, with 90 funds opening new positions, 348 increasing their positions, 400 reducing their positions, and 143 closing their positions.

New
Increased
Maintained
Reduced
Closed

more ownership

Funds ownership:

less funds holding

Funds holding:

less funds holding in top 10

Funds holding in top 10:

less repeat investments, than reductions

Existing positions increased: | Existing positions reduced:

17% less capital invested

Capital invested by funds: $25.4B → $21.1B (-$4.28B)

24% less call options, than puts

Call options by funds: $151M | Put options by funds: $197M

37% less first-time investments, than exits

New positions opened: 90 | Existing positions closed: 143

Holders
994
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
10
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$151M
Puts
$197M
Net Calls
Net Calls Change

Top Buyers

1 +$445M
2 +$304M
3 +$138M
4
Goldman Sachs
Goldman Sachs
New York
+$88M
5
Point72 Asset Management
Point72 Asset Management
Connecticut
+$84.3M

Top Sellers

1 -$224M
2 -$169M
3 -$164M
4
Cohen & Steers
Cohen & Steers
New York
-$137M
5
Wellington Management Group
Wellington Management Group
Massachusetts
-$46.3M
Name Holding Trade Value Shares
Change
Change in
Stake
201
$6.63M
202
$6.6M
203
$6.56M
204
$6.52M
205
$6.45M
206
$6.41M
207
$6.36M
208
$6.32M
209
$6.08M
210
$6.02M
211
$5.99M
212
$5.83M
213
$5.8M
214
$5.79M
215
$5.68M
216
$5.65M
217
$5.65M
218
$5.58M
219
$5.53M
220
$5.51M
221
$5.46M
222
$5.39M
223
$5.39M
224
$5.36M
225
$5.36M