CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM
PensionPosition in IRM — Iron Mountain Inc
CIK 1081019
WEST SACRAMENTO, CA
Position in IRM
as of Mar 31, 2026
· filed May 18, 2026
Position Value
$43,192,043
+$7,183,034 QoQ
Shares Held
422,871
-2.6% QoQ
Ownership
0.142%
of shares outstanding
% of Portfolio
0.05%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Mar 2020
25 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in IRM Over Time
Shares Held
Position Value (USD)
Position in REIT - Specialty
Real Estate · as of Mar 31, 2026CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM holds $539,790,791 across 16 REIT - Specialty names. IRM ranks #5 (8.0% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | EQIX |
Equinix Inc
|
139,037 | $136,289,628 | |
| 2 | AMT |
American Tower Corp /Ma/
|
682,040 | $117,706,463 | |
| 3 | DLR |
Digital Realty Trust, Inc.
|
426,135 | $76,793,788 | |
| 4 | CCI |
Crown Castle Inc.
|
711,707 | $57,868,896 | |
| 5 | IRM |
Iron Mountain Inc
This page
|
422,871 | $43,192,043 | |
| 6 | SBAC |
Sba Communications Corp
|
170,380 | $29,324,101 | |
| 7 | GLPI |
Gaming & Leisure Properties, Inc.
|
634,571 | $28,155,915 | |
| 8 | WY |
Weyerhaeuser Co
|
828,557 | $20,241,647 |
All Filings in IRM
Export CSV
25 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $43,192,043 | 422,871 | Shares | Sole | 2026-05-18 | |
| 2025-12-31 | $36,009,009 | 434,105 | Shares | Sole | 2026-02-17 | |
| 2025-09-30 | $44,910,380 | 440,557 | Shares | Sole | 2025-11-14 | |
| 2025-06-30 | $46,382,256 | 452,201 | Shares | Sole | 2025-08-14 | |
| 2025-03-31 | $37,076,700 | 430,924 | Shares | Sole | 2025-05-15 | |
| 2024-12-31 | $45,669,559 | 434,493 | Shares | Sole | 2025-03-18 | |
| 2024-09-30 | $55,890,621 | 470,341 | Shares | Sole | 2025-04-04 | |
| 2024-06-30 | $42,600,508 | 475,346 | Shares | Sole | 2025-04-08 | |
| 2024-03-31 | $37,536,114 | 467,973 | Shares | Sole | 2024-05-16 | |
| 2023-12-31 | $32,274,985 | 461,203 | Shares | Sole | 2024-02-13 | |
| 2023-09-30 | $27,076,443 | 455,449 | Shares | Sole | 2023-11-14 | |
| 2023-06-30 | $27,026,376 | 475,649 | Shares | Sole | 2023-08-21 | |
| 2023-03-31 | $25,740,132 | 486,489 | Shares | Sole | 2023-05-09 | |
| 2022-12-31 | $24,489,460 | 491,263 | Shares | Sole | 2023-02-14 | |
| 2022-09-30 | $21,421,392 | 487,182 | Shares | Sole | 2022-11-21 | |
| 2022-06-30 | $23,928,116 | 491,438 | Shares | Sole | 2022-08-15 | |
| 2022-03-31 | $27,182,206 | 490,565 | Shares | Sole | 2022-05-16 | |
| 2021-12-31 | $27,122,063 | 518,289 | Shares | Sole | 2022-02-15 | |
| 2021-09-30 | $22,141,728 | 509,591 | Shares | Sole | 2021-11-15 | |
| 2021-06-30 | $21,981,177 | 519,404 | Shares | Sole | 2021-08-16 | |
| 2021-03-31 | $19,927,738 | 538,442 | Shares | Sole | 2021-05-18 | |
| 2020-12-31 | $15,724,337 | 533,390 | Shares | Sole | 2021-02-16 | |
| 2020-09-30 | $14,283,222 | 533,155 | Shares | Sole | 2020-11-17 | |
| 2020-06-30 | $13,612,298 | 521,544 | Shares | Sole | 2020-08-17 | |
| 2020-03-31 | $11,932,582 | 501,369 | Shares | Sole | 2020-05-13 | |
| No filing history on record for this holder in this stock. | ||||||