American Tower Corporation
US ˙ NYSE ˙ US03027X1000

SecurityAMT / American Tower Corporation
InstitutionWetherby Asset Management Inc
Latest Disclosed Ownership12,468 shares
Latest Disclosed Value $ 2,397,889
Wetherby Asset Management Inc reports 0.96% decrease in ownership of AMT / American Tower Corporation

On November 14, 2025 - Wetherby Asset Management Inc filed a 13F-HR form disclosing ownership of 12,468 shares of American Tower Corporation (US:AMT) valued at $2,397,846 USD as of September 30, 2025. The entity filed a previous 13F-HR on August 14, 2025 disclosing 12,589 shares of American Tower Corporation. This represents a change in shares of -0.96% during the quarter. The current value of the position is $2,420,288 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)
2025-11-14 2025-09-30 13F AMERICAN TOWER CORP COM 03027X100 12,468 -121 -0.96 2,398 -13.84 0.0979
2025-08-14 2025-06-30 13F AMERICAN TOWER CORP COM 03027X100 12,589 -296 -2.30 2,782 17.73 0.1239
2025-02-14 2024-12-31 13F AMERICAN TOWER CORP COM 03027X100 12,885 -662 -4.89 2,363 -24.98 0.1133
2024-11-14 2024-09-30 13F AMERICAN TOWER CORP COM 03027X100 13,547 137 1.02 3,150 20.87 0.1441
2024-08-14 2024-06-30 13F AMERICAN TOWER CORP COM 03027X100 13,410 -678 -4.81 2,607 -6.36 0.1229
2024-05-15 2024-03-31 13F AMERICAN TOWER CORP COM 03027X100 14,088 -566 -3.86 2,784 -12.01 0.1326
2024-02-14 2023-12-31 13F AMERICAN TOWER CORP COM 03027X100 14,654 1,015 7.44 3,164 41.08 0.1648
2023-11-14 2023-09-30 13F AMERICAN TOWER CORP COM 03027X100 13,639 -884 -6.09 2,243 -20.38 0.1272
2023-08-14 2023-06-30 13F AMERICAN TOWER CORP COM 03027X100 14,523 -99 -0.68 2,817 -5.72 0.1517
2023-05-12 2023-03-31 13F AMERICAN TOWER CORP COM 03027X100 14,622 -1,057 -6.74 2,988 -10.06 0.1748
2023-02-14 2022-12-31 13F AMERICAN TOWER CORP COM 03027X100 15,679 13 0.08 3,322 -1.28 0.2133
2022-11-14 2022-09-30 13F AMERICAN TOWER CORP COM 03027X100 15,666 -658 -4.03 3,364 -19.39 0.2372
2022-08-15 2022-06-30 13F AMERICAN TOWER CORP COM 03027X100 16,324 3,427 26.57 4,173 28.80 0.2848
2022-05-16 2022-03-31 13F AMERICAN TOWER CORP COM 03027X100 12,897 131 1.03 3,240 -13.23 0.1857
2022-02-14 2021-12-31 13F AMERICAN TOWER CORP COM 03027X100 12,766 160 1.27 3,734 11.60 0.2097
2021-11-15 2021-09-30 13F AMERICAN TOWER CORP COM 03027X100 12,606 86 0.69 3,346 -1.06 0.2065
2021-08-16 2021-06-30 13F AMERICAN TOWER CORP COM 03027X100 12,520 1,767 16.43 3,382 31.54 0.2063
2021-05-14 2021-03-31 13F AMERICAN TOWER CORP COM 03027X100 10,753 -2,375 -18.09 2,571 -12.76 0.1959
2021-02-11 2020-12-31 13F AMERICAN TOWER CORP COM 03027X100 13,128 1,575 13.63 2,947 5.55 0.1998
2020-12-16 2020-09-30 13F/A-01 AMERICAN TOWER CORP COM 03027X100 11,553 -403 -3.37 2,792 -9.67 0.2559
2020-11-13 2020-09-30 13F AMERICAN TOWER CORP COM 03027X100 13,382 1,426 3,234 205,710.7963
2020-08-14 2020-06-30 13F AMERICAN TOWER CORP COM 03027X100 11,956 -342 -2.78 3,091 15.42 0.2930
2020-05-06 2020-03-31 13F AMERICAN TOWER CORP COM 03027X100 12,298 886 7.76 2,678 2.14 0.3006
2020-01-28 2019-12-31 13F AMERICAN TOWER CORP COM 03027X100 11,412 -309 -2.64 2,622 1.16 0.2583
2019-10-31 2019-09-30 13F AMERICAN TOWER CORP COM 03027X100 11,721 -67 -0.57 2,592 7.55 0.2706
2019-07-25 2019-06-30 13F AMERICAN TOWER CORP COM 03027X100 11,788 364 3.19 2,410 7.06 0.2638
2019-07-25 2019-03-31 13F/A-1 AMERICAN TOWER CORP COM 03027X100 11,424 269 2.41 2,251 27.54 0.2803
2019-05-09 2019-03-31 13F AMERICAN TOWER CORP COM 03027X100 11,424 269 2,251
2019-01-30 2018-12-31 13F AMERICAN TOWER CORP COM 03027X100 11,155 536 5.05 1,765 14.39 0.2497
2018-11-07 2018-09-30 13F AMERICAN TOWER CORP COM 03027X100 10,619 1,231 13.11 1,543 14.04 0.1906
2018-07-24 2018-06-30 13F AMERICAN TOWER CORP COM 03027X100 9,388 457 5.12 1,353 4.24 0.1832
2018-05-04 2018-03-31 13F AMERICAN TOWER CORP COM 03027X100 8,931 558 6.66 1,298 8.62 0.1792
2018-02-09 2017-12-31 13F AMERICAN TOWER CORP COM 03027X100 8,373 393 4.92 1,195 9.53 0.1658
2017-11-13 2017-09-30 13F AMERICAN TOWER CORP COM 03027X100 7,980 257 3.33 1,091 6.75 0.1623
2017-08-01 2017-06-30 13F AMERICAN TOWER CORP COM 03027X100 7,723 604 8.48 1,022 18.15 0.1739
2017-04-27 2017-03-31 13F AMERICAN TOWER CORP COM 03027X100 7,119 189 2.73 865 18.01 0.1556
2017-02-08 2016-12-31 13F AMERICAN TOWER CORP COM 03027X100 6,930 -182 -2.56 733 -9.06 0.1436
2016-11-14 2016-09-30 13F AMERICAN TOWER CORP COM 03027X100 7,112 138 1.98 806 1.77 0.1631
2016-08-10 2016-06-30 13F AMERICAN TOWER CORP COM 03027X100 6,974 417 6.36 792 18.03 0.1756
2016-05-10 2016-03-31 13F AMERICAN TOWER CORP COM 03027X100 6,557 -256 -3.76 671 1.67 0.1581
2016-02-08 2015-12-31 13F AMERICAN TOWER CORP COM 03027X100 6,813 234 3.56 660 13.99 0.1582
2015-11-12 2015-09-30 13F AMERICAN TOWER CORP COM 03027X100 6,579 523 8.64 579 2.48 0.1483
2015-08-12 2015-06-30 13F AMERICAN TOWER CORP COM 03027X100 6,056 282 4.88 565 3.86 0.1358
2015-05-08 2015-03-31 13F AMERICAN TOWER CORP COM 03027X100 5,774 -533 -8.45 544 -12.82 0.1324
2015-02-12 2014-12-31 13F AMERICAN TOWER CORP COM 03027X100 6,307 1,236 24.37 624 31.37 0.1569
2014-11-03 2014-09-30 13F AMERICAN TOWER CORP COM 03027X100 5,071 174 3.55 475 7.71 0.1324
2014-08-01 2014-06-30 13F AMERICAN TOWER CORP COM 03027X100 4,897 -165 -3.26 441 6.27 0.1245
2014-05-05 2014-03-31 13F/A-1 AMERICAN TOWER CORP COM 03027X100 5,062 -46 -0.90 415 1.72 0.1190
2014-04-30 2014-03-31 13F AMERICAN TOWER CORP COM 03027X100 5,062 415
2014-01-29 2013-12-31 13F AMERICAN TOWER CORP COM 03027X100 5,108 29 0.57 408 8.51 0.1164
2013-10-29 2013-09-30 13F AMERICAN TOWER CORP COM 03027X100 5,079 -219 -4.13 376 -3.09 0.1173
2013-07-24 2013-06-30 13F AMERICAN TOWER CORP COM 03027X100 5,298 5,298 388 0.1352
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.