아메리칸 타워 코퍼레이션
MX ˙ BMV ˙ US03027X1000
SecurityMX:AMT / American Tower Corporation
InstitutionRockefeller Capital Management L.P.
Latest Disclosed Ownership104,482 shares
Latest Disclosed Value $ 18,031,706
Rockefeller Capital Management L.P. reports 5.81% decrease in ownership of AMT / American Tower Corporation

On May 14, 2026 - Rockefeller Capital Management L.P. filed a 13F-HR form disclosing ownership of 104,482 shares of American Tower Corporation (MX:AMT) valued at $18,031,706 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on March 16, 2026 disclosing 110,926 shares of American Tower Corporation. This represents a change in shares of -5.81% during the quarter.

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)
2026-05-14 2026-03-31 13F AMERICAN TOWER COM 03027X100 104,482 -6,444 -5.81 18,032 -7.61 0.0166
2026-03-16 2025-12-31 13F/A-1 AMERICAN TOWER CORP COM 03027X100 110,926 -2,759 -2.43 19,517 -10.91 0.0351
2026-02-14 2025-12-31 13F AMERICAN TOWER CORP COM 03027X100 110,932 -2,753 19,518 0.0178
2025-11-14 2025-09-30 13F AMERICAN TOWER CORP COM 03027X100 113,685 12,183 12.00 21,906 -4.24 0.0428
2025-08-14 2025-06-30 13F/A-1 AMERICAN TOWER CORP COM 03027X100 101,502 1,395 1.39 22,875 5.01 0.0502
2025-08-08 2025-06-30 13F AMERICAN TOWER CORP COM 03027X100 101,385 1,278 22,849 0.0288
2025-05-14 2025-03-31 13F AMERICAN TOWER CORP COM 03027X100 100,107 5,176 5.45 21,784 25.07 0.0538
2025-02-13 2024-12-31 13F AMERICAN TOWER CORP COM 03027X100 94,931 1,046 1.11 17,417 -20.18 0.0451
2024-11-14 2024-09-30 13F AMERICAN TOWER CORP COM 03027X100 93,885 -2,706 -2.80 21,821 16.21 0.0587
2024-08-12 2024-06-30 13F AMERICAN TOWER CORP COM 03027X100 96,591 -10,858 -10.11 18,777 -11.56 0.0534
2024-05-14 2024-03-31 13F AMERICAN TOWER CORP COM 03027X100 107,449 7,732 7.75 21,231 -1.38 0.0620
2024-02-14 2023-12-31 13F AMERICAN TOWER CORP COM 03027X100 99,717 2,445 2.51 21,527 34.58 0.0719
2023-11-14 2023-09-30 13F AMERICAN TOWER CORP COM 03027X100 97,272 -1,882 -1.90 15,997 -16.80 0.0617
2023-08-14 2023-06-30 13F AMERICAN TOWER CORP COM 03027X100 99,154 -748 -0.75 19,225 96,025.00 0.0745
2023-05-16 2023-03-31 13F AMERICAN TOWER CORP COM 03027X100 99,902 653 0.66 20 -99.90 0.0878
2023-03-06 2022-12-31 13F AMERICAN TOWER CORP COM 03027X100 99,249 -31,377 -24.02 21,026 -25.02 0.1057
2022-11-02 2022-09-30 13F AMERICAN TOWER CORP COM 03027X100 130,626 24,990 23.66 28,044 3.87 0.1449
2022-08-12 2022-06-30 13F AMERICAN TOWER CORP COM 03027X100 105,636 -6,733 -5.99 26,998 -4.36 0.1435
2022-05-13 2022-03-31 13F AMERICAN TOWER CORP COM 03027X100 112,369 -52,463 -31.83 28,228 -41.45 0.1361
2022-02-14 2021-12-31 13F AMERICAN TOWER CORP COM 03027X100 164,832 10,518 6.82 48,212 17.72 0.2250
2021-11-12 2021-09-30 13F AMERICAN TOWER CORP COM 03027X100 154,314 7,446 5.07 40,955 3.23 0.2152
2021-08-10 2021-06-30 13F AMERICAN TOWER CORP COM 03027X100 146,868 15,891 12.13 39,674 26.71 0.2235
2021-05-11 2021-03-31 13F AMERICAN TOWER CORP COM 03027X100 130,977 42,182 47.50 31,310 57.10 0.2119
2021-02-12 2020-12-31 13F AMERICAN TOWER CORP COM 03027X100 88,795 21,087 31.14 19,930 21.78 0.1509
2020-11-13 2020-09-30 13F AMERICAN TOWER CORP COM 03027X100 67,708 13,588 25.11 16,365 16.96 0.1533
2020-08-12 2020-06-30 13F AMERICAN TOWER CORP COM 03027X100 54,120 7,139 15.20 13,992 36.76 0.1464
2020-05-12 2020-03-31 13F AMERICAN TOWER CORP COM 03027X100 46,981 14,000 42.45 10,231 34.97 0.1342
2020-02-07 2019-12-31 13F AMERICAN TOWER CORP COM 03027X100 32,981 38 0.12 7,580 4.04 0.0945
2019-11-12 2019-09-30 13F AMERICAN TOWER CORP COM 03027X100 32,943 3,105 10.41 7,286 19.42 0.0988
2019-08-09 2019-06-30 13F AMERICAN TOWER CORP COM 03027X100 29,838 5,974 25.03 6,101 29.73 0.0851
2019-05-10 2019-03-31 13F AMERICAN TOWER CORP COM 03027X100 23,864 16,275 214.46 4,703 291.92 0.0670
2019-02-12 2018-12-31 13F AMERICAN TOWER CORP COM 03027X100 7,589 0 0.00 1,200 8.79 0.0210
2018-11-02 2018-09-30 13F American Tower Common 03027X100 7,589 50 0.66 1,103 1.47 0.0167
2018-07-31 2018-06-30 13F American Tower Common 03027X100 7,539 689 10.06 1,087 9.14 0.0177
2018-05-09 2018-03-31 13F American Tower Common 03027X100 6,850 6,850 996 0.0165
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.