American Tower Corporation
US ˙ NYSE ˙ US03027X1000

SecurityAMT / American Tower Corporation
InstitutionHm Payson & Co
Latest Disclosed Ownership33,575 shares
Latest Disclosed Value $ 5,794,374
Hm Payson & Co reports 0.37% decrease in ownership of AMT / American Tower Corporation

On April 13, 2026 - Hm Payson & Co filed a 13F-HR form disclosing ownership of 33,575 shares of American Tower Corporation (US:AMT) valued at $5,794,374 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 33,701 shares of American Tower Corporation. This represents a change in shares of -0.37% during the quarter. The current value of the position is $6,118,708 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)
2026-04-13 2026-03-31 13F AMERICAN TOWER COM 03027X100 33,575 -126 -0.37 5,794 -2.06 0.0434
2026-02-12 2025-12-31 13F AMERICAN TOWER CORP COM 03027X100 33,701 -112 -0.33 5,917 -9.01 0.0834
2025-10-17 2025-09-30 13F AMERICAN TOWER CORP COM 03027X100 33,813 2 0.01 6,503 -12.98 0.0935
2025-10-17 2025-06-30 13F AMERICAN TOWER CORP COM 03027X100 33,811 -100 -0.29 7,473 1.26 0.1183
2025-04-29 2025-03-31 13F AMERICAN TOWER CORP COM 03027X100 33,911 200 0.59 7,379 19.36 0.1295
2025-02-07 2024-12-31 13F AMERICAN TOWER CORP COM 03027X100 33,711 96 0.29 6,183 -20.92 0.1049
2024-10-28 2024-09-30 13F AMERICAN TOWER CORP COM 03027X100 33,615 -7 -0.02 7,818 19.62 0.1341
2024-08-13 2024-06-30 13F AMERICAN TOWER CORP COM 03027X100 33,622 -141 -0.42 6,535 -2.04 0.1187
2024-06-20 2024-03-31 13F AMERICAN TOWER CORP COM 03027X100 33,763 -100 -0.30 6,671 -8.74 0.1240
2024-02-13 2023-12-31 13F AMERICAN TOWER CORP COM 03027X100 33,863 155 0.46 7,310 31.88 0.1514
2023-11-06 2023-09-30 13F AMERICAN TOWER CORP COM 03027X100 33,708 76 0.23 5,543 -15.01 0.1299
2023-07-17 2023-06-30 13F AMERICAN TOWER CORP COM 03027X100 33,632 130 0.39 6,523 -4.72 0.1464
2023-04-18 2023-03-31 13F AMERICAN TOWER CORP COM 03027X100 33,502 -60 -0.18 6,846 -3.73 0.1642
2023-02-06 2022-12-31 13F AMERICAN TOWER CORP COM 03027X100 33,562 -672 -1.96 7,110 -3.27 0.1771
2022-10-25 2022-09-30 13F AMERICAN TOWER CORP COM 03027X100 34,234 10 0.03 7,350 -15.97 0.2018
2022-08-15 2022-06-30 13F AMERICAN TOWER CORP COM 03027X100 34,224 0 0.00 8,747 1.73 0.2242
2022-05-12 2022-03-31 13F AMERICAN TOWER CORP COM 03027X100 34,224 70 0.20 8,598 -13.93 0.1957
2022-02-15 2021-12-31 13F AMERICAN TOWER CORP COM 03027X100 34,154 -178 -0.52 9,990 9.64 0.2172
2021-11-30 2021-09-30 13F AMERICAN TOWER CORP COM 03027X100 34,332 -135 -0.39 9,112 -2.14 0.2218
2021-08-17 2021-06-30 13F AMERICAN TOWER CORP COM 03027X100 34,467 390 1.14 9,311 14.30 0.2270
2021-06-15 2021-03-31 13F AMERICAN TOWER CORP COM 03027X100 34,077 304 0.90 8,146 7.45 0.2168
2021-03-10 2020-12-31 13F AMERICAN TOWER CORP COM 03027X100 33,773 -183 -0.54 7,581 -7.64 0.2095
2020-12-21 2020-09-30 13F AMERICAN TOWER CORP COM 03027X100 33,956 118 0.35 8,208 -6.17 0.2528
2020-08-13 2020-06-30 13F AMERICAN TOWER CORP COM 03027X100 33,838 375 1.12 8,748 20.05 0.2934
2020-07-01 2020-03-31 13F AMERICAN TOWER CORP COM 03027X100 33,463 -43 -0.13 7,287 -5.36 0.2863
2020-02-18 2019-12-31 13F AMERICAN TOWER CORP COM 03027X100 33,506 162 0.49 7,700 4.44 0.2473
2019-11-12 2019-09-30 13F AMERICAN TOWER CORP COM 03027X100 33,344 30,243 975.27 7,373 1,062.93 0.2597
2019-08-15 2019-06-30 13F AMERICAN TOWER CORP COM 03027X100 3,101 3,101 634 0.0227
2019-02-15 2018-12-31 13F AMERICAN TOWER COMMON STOCK 03027X100 0 -2,189 -100.00 0 -100.00
2018-11-30 2018-09-30 13F AMERICAN TOWER COMMON STOCK 03027X100 2,189 2,189 318 0.0142
2018-08-27 2018-06-30 13F AMERICAN TOWER COMMON STOCK 03027X100 0 -1,887 -100.00 0 -100.00
2018-05-14 2018-03-31 13F AMERICAN TOWER COMMON STOCK 03027X100 1,887 84 4.66 274 6.61 0.0113
2018-02-16 2017-12-31 13F AMERICAN TOWER COMMON STOCK 03027X100 1,803 210 13.18 257 17.89 0.0103
2017-11-06 2017-09-30 13F AMERICAN TOWER COMMON STOCK 03027X100 1,593 1,593 218 0.0094
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.