American Tower Corporation
MX ˙ BMV ˙ US03027X1000
SecurityMX:AMT / American Tower Corporation
InstitutionHaverford Trust Co
Latest Disclosed Ownership159,356 shares
Latest Disclosed Value $ 27,501,658
Haverford Trust Co reports 4.25% increase in ownership of AMT / American Tower Corporation

On May 11, 2026 - Haverford Trust Co filed a 13F-HR form disclosing ownership of 159,356 shares of American Tower Corporation (MX:AMT) valued at $27,501,658 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 152,862 shares of American Tower Corporation. This represents a change in shares of 4.25% 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)
2026-05-11 2026-03-31 13F AMERICAN TOWER COM 03027X100 159,356 6,494 4.25 27,502 2.47 0.2520
2026-02-13 2025-12-31 13F AMERICAN TOWER CORP COM 03027X100 152,862 -31,606 -17.13 26,838 -24.35 0.2393
2025-11-14 2025-09-30 13F AMERICAN TOWER CORP COM 03027X100 184,468 1,221 0.67 35,477 -12.41 0.3200
2025-08-13 2025-06-30 13F AMERICAN TOWER CORP COM 03027X100 183,247 311 0.17 40,501 1.75 0.3848
2025-05-14 2025-03-31 13F AMERICAN TOWER CORP COM 03027X100 182,936 3,207 1.78 39,807 20.76 0.4006
2025-02-11 2024-12-31 13F AMERICAN TOWER CORP COM 03027X100 179,729 -7,873 -4.20 32,964 -24.44 0.3273
2024-11-05 2024-09-30 13F AMERICAN TOWER COM 03027X100 187,602 -645 -0.34 43,629 19.23 0.4251
2024-08-13 2024-06-30 13F AMERICAN TOWER COM 03027X100 188,247 -9,866 -4.98 36,591 -6.52 0.3852
2024-05-02 2024-03-31 13F AMERICAN TOWER COM 03027X100 198,113 19,038 10.63 39,145 1.26 0.4090
2024-02-08 2023-12-31 13F AMERICAN TOWER COM 03027X100 179,075 -51,390 -22.30 38,659 2.00 0.4289
2023-11-09 2023-09-30 13F AMERICAN TOWER COM 03027X100 230,465 -8,689 -3.63 37,900 -18.29 0.4619
2023-08-08 2023-06-30 13F AMERICAN TOWER COM 03027X100 239,154 1,584 0.67 46,382 -4.46 0.5234
2023-05-12 2023-03-31 13F AMERICAN TOWER COM 03027X100 237,570 10,464 4.61 48,545 0.90 0.5798
2023-02-13 2022-12-31 13F AMERICAN TOWER COM 03027X100 227,106 -4,460 -1.93 48,115 -3.22 0.5924
2022-11-14 2022-09-30 13F AMERICAN TOWER COM 03027X100 231,566 4,767 2.10 49,717 -14.23 0.6811
2022-08-12 2022-06-30 13F AMERICAN TOWER COM 03027X100 226,799 5,361 2.42 57,968 4.20 0.7555
2022-05-05 2022-03-31 13F AMERICAN TOWER COM 03027X100 221,438 7,062 3.29 55,630 -11.28 0.6426
2022-02-14 2021-12-31 13F AMERICAN TOWER COM 03027X100 214,376 2,805 1.33 62,705 11.67 0.6831
2021-11-12 2021-09-30 13F AMERICAN TOWER COM 03027X100 211,571 1,931 0.92 56,153 -0.85 0.6716
2021-08-16 2021-06-30 13F/A-1 AMERICAN TOWER COM 03027X100 209,640 15,064 7.74 56,632 21.75 0.6665
2021-08-16 2021-06-30 13F AMERICAN TOWER COM 03027X100 56,632 -137,944 56,632 0.6665
2021-05-12 2021-03-31 13F AMERICAN TOWER COM 03027X100 194,576 29,847 18.12 46,515 25.80 0.5953
2021-02-05 2020-12-31 13F AMERICAN TOWER COM 03027X100 164,729 43,260 35.61 36,975 25.92 0.5223
2020-11-10 2020-09-30 13F AMERICAN TOWER COM 03027X100 121,469 -1,618 -1.31 29,363 -7.73 0.4682
2020-08-13 2020-06-30 13F AMERICAN TOWER COM 03027X100 123,087 -1,995 -1.59 31,823 16.84 0.5458
2020-05-11 2020-03-31 13F AMERICAN TOWER COM 03027X100 125,082 174 0.14 27,237 -5.12 0.5532
2020-02-10 2019-12-31 13F AMERICAN TOWER COM 03027X100 124,908 -3,932 -3.05 28,706 0.76 0.4651
2019-11-04 2019-09-30 13F AMERICAN TOWER COM 03027X100 128,840 897 0.70 28,490 8.92 0.5000
2019-08-13 2019-06-30 13F AMERICAN TOWER COM 03027X100 127,943 621 0.49 26,158 4.26 0.4693
2019-05-09 2019-03-31 13F AMERICAN TOWER COM 03027X100 127,322 1,142 0.91 25,090 25.70 0.4657
2019-02-12 2018-12-31 13F AMERICAN TOWER COM 03027X100 126,180 -1,091 -0.86 19,960 7.94 0.4249
2018-11-08 2018-09-30 13F AMERICAN TOWER COM 03027X100 127,271 -1,046 -0.82 18,492 -0.04 0.3414
2018-08-10 2018-06-30 13F AMERICAN TOWER COM 03027X100 128,317 4,143 3.34 18,499 2.50 0.3655
2018-05-09 2018-03-31 13F AMERICAN TOWER CORP COM 03027X100 124,174 124,174 18,047 0.3612
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.