American Tower Corporation
US ˙ NYSE ˙ US03027X1000

SecurityAMT / American Tower Corporation
InstitutionM&G Plc
Latest Disclosed Ownership1,115,542 shares
Latest Disclosed Value $ 192,988,766
M&G Plc reports 3.76% increase in ownership of AMT / American Tower Corporation

On May 13, 2026 - M&G Plc filed a 13F-HR form disclosing ownership of 1,115,542 shares of American Tower Corporation (US:AMT) valued at $192,520,238 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 1,075,131 shares of American Tower Corporation. This represents a change in shares of 3.76% during the quarter. The current value of the position is $216,314,749 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-13 2026-03-31 13F AMERICAN TOWER COM 03027X100 1,115,542 40,411 3.76 192,989 1.99 0.7641
2026-02-12 2025-12-31 13F AMERICAN TOWER CORP COM 03027X100 1,075,131 65,605 6.50 189,223 -2.38 0.9720
2025-11-07 2025-09-30 13F AMERICAN TOWER CORP COM 03027X100 1,009,526 125,241 14.16 193,829 -0.82 1.0306
2025-08-08 2025-06-30 13F AMERICAN TOWER CORP COM 03027X100 884,285 -30,328 -3.32 195,427 -1.99 1.0765
2025-05-13 2025-03-31 13F AMERICAN TOWER CORP COM 03027X100 914,613 -74,086 -7.49 199,386 10.20 0.9539
2025-02-11 2024-12-31 13F AMERICAN TOWER CORP COM 03027X100 988,699 352,814 55.48 180,932 22.12 1.1168
2024-10-31 2024-09-30 13F AMERICAN TOWER CORP COM 03027X100 635,885 -142,178 -18.27 148,161 -1.84 0.6018
2024-07-16 2024-06-30 13F AMERICAN TOWER CORP COM 03027X100 778,063 -51,735 -6.23 150,944 -8.13 0.5961
2024-05-10 2024-03-31 13F AMERICAN TOWER CORP COM 03027X100 829,798 829,798 164,300 0.6212
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.