American Tower Corporation
US ˙ NYSE ˙ US03027X1000

SecurityAMT / American Tower Corporation
InstitutionBokf, Na
Latest Disclosed Ownership5,059 shares
Latest Disclosed Value $ 873,082
Bokf, Na reports 11.88% increase in ownership of AMT / American Tower Corporation

On May 8, 2026 - Bokf, Na filed a 13F-HR form disclosing ownership of 5,059 shares of American Tower Corporation (US:AMT) valued at $873,082 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 3, 2026 disclosing 4,522 shares of American Tower Corporation. This represents a change in shares of 11.88% during the quarter. The current value of the position is $980,991 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)
2026-05-08 2026-03-31 13F AMERICAN TOWER CORP COM REIT common 03027X100 5,059 537 11.88 873 10.09 0.0103
2026-02-03 2025-12-31 13F AMERICAN TOWER CORP COM REIT common 03027X100 4,522 -1,392 -23.54 794 -30.26 0.0122
2025-11-13 2025-09-30 13F AMERICAN TOWER CORP COM REIT common 03027X100 5,914 4,177 240.47 1,137 196.87 0.0171
2025-08-12 2025-06-30 13F AMERICAN TOWER CORP COM REIT common 03027X100 1,737 140 8.77 384 10.37 0.0062
2025-05-13 2025-03-31 13F AMERICAN TOWER CORP COM REIT common 03027X100 1,597 -468 -22.66 348 -3.07 0.0061
2025-02-14 2024-12-31 13F AMERICAN TOWER CORP COM REIT common 03027X100 2,065 -113 -5.19 358 -28.26 0.0061
2024-11-14 2024-09-30 13F AMERICAN TOWER CORP COM REIT common 03027X100 2,178 -8 -0.37 499 17.69 0.0089
2024-08-08 2024-06-30 13F AMERICAN TOWER CORP COM 03027X100 2,186 -4,062 -65.01 425 -64.81 0.0076
2024-05-15 2024-03-31 13F AMERICAN TOWER CORP COM 03027X100 6,248 164 2.70 1,206 -8.23 0.0220
2024-02-14 2023-12-31 13F AMERICAN TOWER CORP COM 03027X100 6,084 125 2.10 1,313 23.75 0.0257
2023-11-14 2023-09-30 13F AMERICAN TOWER CORP COM 03027X100 5,959 -3,189 -34.86 1,062 -40.19 0.0234
2023-08-21 2023-06-30 13F AMERICAN TOWER CORP COM 03027X100 9,148 -2,614 -22.22 1,774 -26.18 0.0361
2023-05-11 2023-03-31 13F AMERICAN TOWER CORP COM 03027X100 11,762 -4,069 -25.70 2,403 -28.35 0.0503
2023-02-13 2022-12-31 13F AMERICAN TOWER CORP COM 03027X100 15,831 -544 -3.32 3,354 -4.61 0.0619
2022-11-14 2022-09-30 13F AMERICAN TOWER CORP COM 03027X100 16,375 -2,143 -11.57 3,516 -25.71 0.0711
2022-08-11 2022-06-30 13F AMERICAN TOWER CORP COM 03027X100 18,518 158 0.86 4,733 2.60 0.0907
2022-05-13 2022-03-31 13F AMERICAN TOWER CORP COM 03027X100 18,360 -870 -4.52 4,613 -17.99 0.0760
2022-03-11 2021-12-31 13F AMERICAN TOWER CORP COM 03027X100 19,230 219 1.15 5,625 11.47 0.0870
2021-11-10 2021-09-30 13F AMERICAN TOWER CORP COM 03027X100 19,011 -3,024 -13.72 5,046 -4.21 0.0868
2021-04-21 2021-03-31 13F AMERICAN TOWER CORP COM 03027X100 22,035 -4,666 -17.48 5,268 -12.10 0.0958
2021-02-12 2020-12-31 13F AMERICAN TOWER CORP COM 03027X100 26,701 6,134 29.82 5,993 20.53 0.1144
2020-10-30 2020-09-30 13F AMERICAN TOWER CORP COM 03027X100 20,567 -90 -0.44 4,972 -6.91 0.1092
2020-08-12 2020-06-30 13F AMERICAN TOWER CORP COM 03027X100 20,657 7,495 56.94 5,341 86.36 0.1256
2020-05-13 2020-03-31 13F AMERICAN TOWER CORP COM 03027X100 13,162 1,031 8.50 2,866 2.80 0.0826
2020-02-12 2019-12-31 13F AMERICAN TOWER CORP COM 03027X100 12,131 674 5.88 2,788 10.07 0.0630
2019-11-13 2019-09-30 13F AMERICAN TOWER CORP COM 03027X100 11,457 2,108 22.55 2,533 32.55 0.0610
2019-08-14 2019-06-30 13F AMERICAN TOWER CORP COM 03027X100 9,349 -929 -9.04 1,911 -5.63 0.0459
2019-05-15 2019-03-31 13F AMERICAN TOWER CORP COM 03027X100 10,278 58 0.57 2,025 25.23 0.0485
2019-02-13 2018-12-31 13F AMERICAN TOWER CORP COM 03027X100 10,220 -1,413 -12.15 1,617 -4.32 0.0463
2018-11-13 2018-09-30 13F AMERICAN TOWER CORP COM 03027X100 11,633 -1,878 -13.90 1,690 -13.24 0.0424
2018-08-13 2018-06-30 13F AMERICAN TOWER CORP COM 03027X100 13,511 1,077 8.66 1,948 7.74 0.0524
2018-05-14 2018-03-31 13F AMERICAN TOWER CORP COM 03027X100 12,434 -509 -3.93 1,808 -2.11 0.0514
2018-02-14 2017-12-31 13F AMERICAN TOWER CORP COM 03027X100 12,943 -976 -7.01 1,847 -2.89 0.0509
2017-11-14 2017-09-30 13F AMERICAN TOWER CORP COM 03027X100 13,919 1,950 16.29 1,902 20.08 0.0552
2017-08-14 2017-06-30 13F AMERICAN TOWER CORP COM 03027X100 11,969 -1,117 -8.54 1,584 -0.44 0.0498
2017-05-15 2017-03-31 13F AMERICAN TOWER CORP COM 03027X100 13,086 186 1.44 1,591 16.73 0.0496
2017-02-14 2016-12-31 13F AMERICAN TOWER CORP COM 03027X100 12,900 -144 -1.10 1,363 -7.84 0.0448
2016-11-10 2016-09-30 13F AMERICAN TOWER CORP COM 03027X100 13,044 -363 -2.71 1,479 -2.89 0.0490
2016-08-12 2016-06-30 13F AMERICAN TOWER CORP COM 03027X100 13,407 976 7.85 1,523 19.73 0.0537
2016-05-13 2016-03-31 13F AMERICAN TOWER CORP COM 03027X100 12,431 405 3.37 1,272 9.09 0.0460
2016-02-09 2015-12-31 13F AMERICAN TOWER CORP COM 03027X100 12,026 38 0.32 1,166 10.63 0.0422
2015-11-13 2015-09-30 13F AMERICAN TOWER CORP COM 03027X100 11,988 3,278 37.63 1,054 29.80 0.0397
2015-08-13 2015-06-30 13F AMERICAN TOWER CORP COM 03027X100 8,710 -1 -0.01 812 -1.10 0.0276
2015-05-14 2015-03-31 13F AMERICAN TOWER CORP COM 03027X100 8,711 6,220 249.70 821 233.74 0.0276
2015-02-12 2014-12-31 13F AMERICAN TOWER CORP COM 03027X100 2,491 -5,928 -70.41 246 -68.78 0.0085
2014-11-13 2014-09-30 13F AMERICAN TOWER CORP COM 03027X100 8,419 1,847 28.10 788 33.11 0.0263
2014-08-14 2014-06-30 13F AMERICAN TOWER CORP COM 03027X100 6,572 -664 -9.18 592 -0.17 0.0190
2014-05-14 2014-03-31 13F AMERICAN TOWER CORP COM 03027X100 7,236 1,720 31.18 593 34.77 0.0197
2014-02-14 2013-12-31 13F AMERICAN TOWER CORP COM 03027X100 5,516 -5,699 -50.82 440 -47.05 0.0147
2013-11-12 2013-09-30 13F AMERICAN TOWER CORP COM 03027X100 11,215 2,233 24.86 831 26.48 0.0302
2013-08-14 2013-06-30 13F AMERICAN TOWER CORP COM 03027X100 8,982 8,982 657 0.0248
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.