American Tower Corporation
MX ˙ BMV ˙ US03027X1000
SecurityMX:AMT / American Tower Corporation
InstitutionClaro Advisors LLC
Latest Disclosed Ownership1,383 shares
Latest Disclosed Value $ 238,683
Claro Advisors LLC reports 6.81% decrease in ownership of AMT / American Tower Corporation

On April 21, 2026 - Claro Advisors LLC filed a 13F-HR form disclosing ownership of 1,383 shares of American Tower Corporation (MX:AMT) valued at $238,683 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 1,484 shares of American Tower Corporation. This represents a change in shares of -6.81% 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)
2026-04-21 2026-03-31 13F AMERICAN TOWER COM 03027X100 1,383 -101 -6.81 239 -8.46 0.0288
2026-02-17 2025-12-31 13F AMERICAN TOWER CORP COM 03027X100 1,484 349 30.75 261 19.27 0.0355
2025-11-12 2025-09-30 13F AMERICAN TOWER CORP COM 03027X100 1,135 -193 -14.53 218 -25.60 0.0318
2025-08-05 2025-06-30 13F AMERICAN TOWER CORP COM 03027X100 1,328 -834 -38.58 294 -37.66 0.0485
2025-05-12 2025-03-31 13F AMERICAN TOWER CORP COM 03027X100 2,162 644 42.42 470 69.06 0.0630
2025-01-13 2024-12-31 13F AMERICAN TOWER CORP COM 03027X100 1,518 -173 -10.23 278 -29.26 0.0376
2024-11-07 2024-09-30 13F/A-1 AMERICAN TOWER CORP COM 03027X100 1,691 36 2.18 393 22.43 0.0508
2024-10-17 2024-09-30 13F AMERICAN TOWER CORP COM 03027X100 12,240 10,585 1,256 0.1623
2024-07-31 2024-06-30 13F AMERICAN TOWER CORP COM 03027X100 1,655 414 33.36 322 31.02 0.0502
2024-04-18 2024-03-31 13F AMERICAN TOWER CORP COM 03027X100 1,241 176 16.53 245 6.99 0.0426
2024-01-22 2023-12-31 13F AMERICAN TOWER CORP COM 03027X100 1,065 1,065 230 0.0498
2023-10-10 2023-09-30 13F AMERICAN TOWER CORP COM 03027X100 0 -1,095 -100.00 0 -100.00
2023-08-08 2023-06-30 13F AMERICAN TOWER CORP COM 03027X100 1,095 -73 -6.25 212 -10.92 0.0528
2023-04-17 2023-03-31 13F AMERICAN TOWER CORP COM 03027X100 1,168 119 11.34 239 7.21 0.0701
2023-03-13 2022-12-31 13F/A-1 AMERICAN TOWER CORP COM 03027X100 1,049 11 1.06 222 -16.23 0.0727
2023-02-14 2022-12-31 13F AMERICAN TOWER CORP COM 03027X100 1,049 11 222 0.0725
2022-11-18 2022-09-30 13F/A-1 AMERICAN TOWER CORP COM 03027X100 1,038 0 0.00 265 0.00 0.1053
2022-11-14 2022-09-30 13F AMERICAN TOWER CORP COM 03027X100 1,038 0 265 0.1053
2022-08-12 2022-06-30 13F AMERICAN TOWER CORP COM 03027X100 1,038 124 13.57 265 -0.75 0.1053
2022-05-16 2022-03-31 13F AMERICAN TOWER CORP COM 03027X100 914 0 0.00 267 0.00 0.0960
2022-02-14 2021-12-31 13F AMERICAN TOWER CORP COM 03027X100 914 7 0.77 267 10.79 0.0961
2021-11-15 2021-09-30 13F AMERICAN TOWER CORP COM 03027X100 907 18 2.02 241 0.42 0.1014
2021-08-13 2021-06-30 13F AMERICAN TOWER CORP COM 03027X100 889 49 5.83 240 19.40 0.1080
2021-05-17 2021-03-31 13F AMERICAN TOWER CORP COM 03027X100 840 840 -5.51 201 -16.25 0.1018
2020-11-16 2020-09-30 13F AMERICAN TOWER CORP COM 03027X100 0 -824 -100.00 0 -100.00
2020-08-14 2020-06-30 13F AMERICAN TOWER CORP COM 03027X100 824 824 213 0.1466
2019-05-09 2019-03-31 13F AMERICAN TOWER CORP COM 03027X100 0 -190 -100.00 0 -100.00
2019-02-14 2018-12-31 13F AMERICAN TOWER CORP COM 03027X100 190 190 28 0.0224
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.