American Tower Corporation
MX ˙ BMV ˙ US03027X1000
SecurityMX:AMT / American Tower Corporation
InstitutionJohnson Financial Group, Inc.
Latest Disclosed Ownership574 shares
Latest Disclosed Value $ 99,062
Johnson Financial Group, Inc. reports 10.45% decrease in ownership of AMT / American Tower Corporation

On May 7, 2026 - Johnson Financial Group, Inc. filed a 13F-HR form disclosing ownership of 574 shares of American Tower Corporation (MX:AMT) valued at $99,062 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 641 shares of American Tower Corporation. This represents a change in shares of -10.45% 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)
2026-05-07 2026-03-31 13F AMERICAN TOWER COM 03027X100 574 -67 -10.45 99 -12.39 0.0036
2026-02-12 2025-12-31 13F AMERICAN TOWER CORP COM 03027X100 641 -530 -45.26 114 -50.22 0.0043
2025-11-13 2025-09-30 13F AMERICAN TOWER CORP COM 03027X100 1,171 338 40.58 227 22.70 0.0085
2025-08-13 2025-06-30 13F AMERICAN TOWER CORP COM 03027X100 833 55 7.07 186 9.47 0.0083
2025-05-15 2025-03-31 13F AMERICAN TOWER CORP COM 03027X100 778 0 0.00 169 16.55 0.0083
2025-02-14 2024-12-31 13F AMERICAN TOWER CORP COM 03027X100 778 -1,100 -58.57 145 -66.74 0.0069
2024-11-13 2024-09-30 13F AMERICAN TOWER CORP COM 03027X100 1,878 975 107.97 437 146.33 0.0200
2024-08-14 2024-06-30 13F AMERICAN TOWER CORP COM 03027X100 903 -275 -23.34 177 -23.71 0.0086
2024-05-14 2024-03-31 13F AMERICAN TOWER CORP COM 03027X100 1,178 -598 -33.67 233 -39.90 0.0125
2024-02-09 2023-12-31 13F/A-1 AMERICAN TOWER CORP COM 03027X100 1,776 487 37.78 386 82.94 0.0211
2024-02-09 2023-12-31 13F AMERICAN TOWER CORP COM 03027X100 1,776 487 386 0.0127
2023-11-14 2023-09-30 13F AMERICAN TOWER CORP COM 03027X100 1,289 -858 -39.96 212 -49.64 0.0147
2023-08-14 2023-06-30 13F AMERICAN TOWER CORP COM 03027X100 2,147 252 13.30 419 8.27 0.0290
2023-05-12 2023-03-31 13F AMERICAN TOWER CORP COM 03027X100 1,895 -46 -2.37 387 -5.84 0.0276
2023-02-13 2022-12-31 13F AMERICAN TOWER CORP COM 03027X100 1,941 129 7.12 411 9.60 0.0326
2022-11-14 2022-09-30 13F AMERICAN TOWER CORP COM 03027X100 1,812 -99 -5.18 375 -23.16 0.0346
2022-08-15 2022-06-30 13F AMERICAN TOWER CORP COM 03027X100 1,911 124 6.94 488 8.69 0.0350
2022-05-16 2022-03-31 13F AMERICAN TOWER CORP COM 03027X100 1,787 -68 -3.67 449 -17.31 0.0317
2022-02-14 2021-12-31 13F AMERICAN TOWER CORP COM 03027X100 1,855 -411 -18.14 543 -9.65 0.0344
2021-11-12 2021-09-30 13F AMERICAN TOWER CORP COM 03027X100 2,266 189 9.10 601 7.13 0.0409
2021-08-13 2021-06-30 13F AMERICAN TOWER CORP COM 03027X100 2,077 -481 -18.80 561 -8.33 0.0367
2021-05-14 2021-03-31 13F AMERICAN TOWER COM 03027X100 2,558 -18 -0.70 612 5.88 0.0412
2021-02-12 2020-12-31 13F AMERICAN TOWER COM 03027X100 2,576 -672 -20.69 578 -26.46 0.0494
2020-11-12 2020-09-30 13F AMERICAN TOWER CORP COM 03027X100 3,248 284 9.58 786 2.61 0.0803
2020-08-11 2020-06-30 13F AMERICAN TOWER COM 03027X100 2,964 142 5.03 766 24.76 0.0823
2020-05-14 2020-03-31 13F AMERICAN TOWER COM 03027X100 2,822 -333 -10.55 614 -15.31 0.0734
2020-02-14 2019-12-31 13F AMERICAN TOWER COM 03027X100 3,155 -309 -8.92 725 -5.35 0.0655
2019-11-12 2019-09-30 13F AMERICAN TOWER CORP REIT COM 03027X100 3,464 15 0.43 766 8.65 0.0703
2019-08-09 2019-06-30 13F AMERICAN TOWER CORP REIT COM 03027X100 3,449 370 12.02 705 16.14 0.0627
2019-05-13 2019-03-31 13F AMERICAN TOWER COM 03027X100 3,079 400 14.93 607 43.16 0.0538
2019-02-11 2018-12-31 13F AMERICAN TOWER CORP REIT COM 03027X100 2,679 -240 -8.22 424 0.00 0.0436
2018-11-09 2018-09-30 13F AMERICAN TOWER CORP REIT COM 03027X100 2,919 -3,399 -53.80 424 -53.46 0.0433
2018-08-07 2018-06-30 13F AMERICAN TOWER CORP REIT COM 03027X100 6,318 -830 -11.61 911 -12.32 0.1000
2018-05-07 2018-03-31 13F AMERICAN TOWER CORP REIT COM 03027X100 7,148 -216 -2.93 1,039 -1.05 0.1242
2018-02-12 2017-12-31 13F AMERICAN TOWER CORP REIT COM 03027X100 7,364 156 2.16 1,050 6.71 0.1286
2017-11-09 2017-09-30 13F AMERICAN TOWER CORP REIT COM 03027X100 7,208 310 4.49 984 7.78 0.1294
2017-08-10 2017-06-30 13F AMERICAN TOWER CORP REIT COM 03027X100 6,898 -6,683 -49.21 913 -44.70 0.1313
2017-05-12 2017-03-31 13F AMERICAN TOWER CORP REIT COM 03027X100 13,581 295 2.22 1,651 17.51 0.2078
2017-02-07 2016-12-31 13F/A-1 AMERICAN TOWER CORP REIT COM 03027X100 13,286 7,287 121.47 1,405 106.62 0.1937
2017-02-02 2016-12-31 13F AMERICAN TOWER CORP REIT COM 03027X100 13,286 1,405
2016-11-14 2016-09-30 13F AMERICAN TOWER CORP REIT COM 03027X100 5,999 2,119 54.61 680 54.20 0.0908
2016-08-12 2016-06-30 13F AMERICAN TOWER CORP REIT COM 03027X100 3,880 1,480 61.67 441 79.27 0.0611
2016-05-09 2016-03-31 13F AMERICAN TOWER CORP REIT COM 03027X100 2,400 990 70.21 246 79.56 0.0492
2016-02-08 2015-12-31 13F AMERICAN TOWER CORP REIT COM 03027X100 1,410 51 3.75 137 14.17 0.0285
2015-11-02 2015-09-30 13F AMERICAN TOWER CORP REIT COM 03027X100 1,359 135 11.03 120 5.26 0.0263
2015-08-11 2015-06-30 13F AMERICAN TOWER CORP REIT COM 03027X100 1,224 145 13.44 114 11.76 0.0236
2015-05-12 2015-03-31 13F AMERICAN TOWER CORP REIT COM 03027X100 1,079 200 22.75 102 17.24 0.0219
2015-02-10 2014-12-31 13F AMERICAN TOWER CORP REIT COM 03027X100 879 0 0.00 87 4.82 0.0202
2014-11-14 2014-09-30 13F AMERICAN TOWER CORP REIT COM 03027X100 879 -126 -12.54 83 -7.78 0.0216
2014-08-06 2014-06-30 13F AMERICAN TOWER CORP COM 03027X100 1,005 -202 -16.74 90 -9.09 0.0237
2014-05-14 2014-03-31 13F AMERICAN TOWER CORP COM 03027X100 1,207 0 0.00 99 3.13 0.0289
2014-02-11 2013-12-31 13F AMERICAN TOWER CORP COM 03027X100 1,207 267 28.40 96 37.14 0.0278
2013-11-14 2013-09-30 13F AMERICAN TOWER CORP COM 03027X100 940 435 86.14 70 89.19 0.0212
2013-08-14 2013-06-30 13F AMERICAN TOWER CORP COM 03027X100 505 505 37 0.0103
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.