American Tower Corporation
US ˙ NYSE ˙ US03027X1000

SecurityAMT / American Tower Corporation
InstitutionIng Groep Nv
Latest Disclosed Ownership37,377 shares
Latest Disclosed Value $ 6,450,523
Ing Groep Nv reports 38.22% decrease in ownership of AMT / American Tower Corporation

On May 11, 2026 - Ing Groep Nv filed a 13F-HR form disclosing ownership of 37,377 shares of American Tower Corporation (US:AMT) valued at $6,450,523 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 60,501 shares of American Tower Corporation. This represents a change in shares of -38.22% during the quarter. The current value of the position is $7,247,774 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)
2026-05-11 2026-03-31 13F AMERICAN TOWER COM 03027X100 37,377 -23,124 -38.22 6,451 -39.28 0.0394
2026-02-11 2025-12-31 13F AMERICAN TOWER CORP COM 03027X100 60,501 -33 -0.05 10,622 -8.75 0.0641
2025-11-06 2025-09-30 13F AMERICAN TOWER CORP COM 03027X100 60,534 59,436 5,413.11 11,642 4,710.33 0.0630
2025-08-06 2025-06-30 13F AMERICAN TOWER CORP COM 03027X100 1,098 -58,570 -98.16 243 -98.14 0.0015
2025-05-09 2025-03-31 13F AMERICAN TOWER CORP COM 03027X100 59,668 59,668 12,984 0.0900
2025-02-03 2024-12-31 13F AMERICAN TOWER CORP COM 03027X100 0 -42,768 -100.00 0 -100.00
2024-11-06 2024-09-30 13F AMERICAN TOWER CORP COM 03027X100 42,768 -18,078 -29.71 9,946 -15.90 0.0578
2024-08-13 2024-06-30 13F AMERICAN TOWER CORP COM 03027X100 60,846 -1,042 -1.68 11,827 -3.28 0.0702
2024-05-10 2024-03-31 13F AMERICAN TOWER CORP COM 03027X100 61,888 -21,131 -25.45 12,228 -31.77 0.0838
2024-02-08 2023-12-31 13F AMERICAN TOWER CORP COM 03027X100 83,019 27,097 48.45 17,922 94.89 0.1440
2023-10-27 2023-09-30 13F AMERICAN TOWER CORP COM 03027X100 55,922 -38,651 -40.87 9,196 -49.86 0.0811
2023-08-07 2023-06-30 13F AMERICAN TOWER CORP COM 03027X100 94,573 -12,547 -11.71 18,341 -16.21 0.1391
2023-05-09 2023-03-31 13F AMERICAN TOWER CORP COM 03027X100 107,120 -22,044 -17.07 21,889 -20.01 0.2125
2023-02-13 2022-12-31 13F AMERICAN TOWER CORP COM 03027X100 129,164 6,192 5.04 27,365 3.64 0.2747
2022-11-14 2022-09-30 13F AMERICAN TOWER CORP COM 03027X100 122,972 35,526 40.63 26,402 18.13 0.4418
2022-08-08 2022-06-30 13F AMERICAN TOWER CORP COM 03027X100 87,446 15,192 21.03 22,350 23.13 0.2584
2022-05-13 2022-03-31 13F AMERICAN TOWER CORP COM 03027X100 72,254 12,815 21.56 18,152 4.41 0.1830
2022-02-11 2021-12-31 13F AMERICAN TOWER CORP COM 03027X100 59,439 21,228 55.55 17,386 71.43 0.1555
2021-11-02 2021-09-30 13F AMERICAN TOWER CORP COM 03027X100 38,211 867 2.32 10,142 0.54 0.1302
2021-08-13 2021-06-30 13F AMERICAN TOWER CORP COM 03027X100 37,344 7,921 26.92 10,088 43.42 0.1608
2021-05-12 2021-03-31 13F AMERICAN TOWER CORP COM 03027X100 29,423 -41 -0.14 7,034 6.37 0.1457
2021-02-11 2020-12-31 13F AMERICAN TOWER CORP COM 03027X100 29,464 19,647 200.13 6,613 178.68 0.1476
2020-11-12 2020-09-30 13F AMERICAN TOWER CORP COM 03027X100 9,817 6,067 161.79 2,373 144.64 0.0978
2020-08-13 2020-06-30 13F AMERICAN TOWER CORP COM 03027X100 3,750 -4,357 -53.74 970 -45.04 0.0418
2020-05-06 2020-03-31 13F AMERICAN TOWER CORP COM 03027X100 8,107 -22,275 -73.32 1,765 -74.72 0.0755
2020-02-10 2019-12-31 13F AMERICAN TOWER CORP COM 03027X100 30,382 2,755 9.97 6,982 14.29 0.2125
2019-11-08 2019-09-30 13F AMERICAN TOWER CORP COM 03027X100 27,627 27,627 -9.07 6,109 -12.50 0.1552
2019-08-12 2019-06-30 13F AMERICAN TOWER CORP COM 03027X100 0 -2,111 -100.00 0 -100.00
2019-05-13 2019-03-31 13F AMERICAN TOWER CORP COM 03027X100 2,111 85 4.20 416 30.00 0.0090
2019-02-13 2018-12-31 13F AMERICAN TOWER CORP COM 03027X100 2,026 438 27.58 320 38.53 0.0069
2018-11-06 2018-09-30 13F AMERICAN TOWER CORP COM 03027X100 1,588 -703 -30.69 231 -30.00 0.0040
2018-08-10 2018-06-30 13F AMERICAN TOWER CORP COM 03027X100 2,291 -12,552 -84.57 330 -84.70 0.0063
2018-05-07 2018-03-31 13F AMERICAN TOWER CORP COM 03027X100 14,843 -25,933 -63.60 2,157 -62.93 0.0391
2018-02-06 2017-12-31 13F AMERICAN TOWER CORP COM 03027X100 40,776 3,686 9.94 5,818 14.78 0.0970
2017-11-08 2017-09-30 13F AMERICAN TOWER CORP COM 03027X100 37,090 15,325 70.41 5,069 76.01 0.0977
2017-07-25 2017-06-30 13F AMERICAN TOWER CORP COM 03027X100 21,765 -41 -0.19 2,880 8.68 0.0552
2017-05-01 2017-03-31 13F AMERICAN TOWER CORP COM 03027X100 21,806 -2,700 -11.02 2,650 1.65 0.0480
2017-02-06 2016-12-31 13F AMERICAN TOWER CORP COM 03027X100 24,506 8,756 55.59 2,607 45.89 0.0489
2016-11-14 2016-09-30 13F AMERICAN TOWER CORP COM 03027X100 15,750 730 4.86 1,787 4.75 0.0215
2016-07-27 2016-06-30 13F AMERICAN TOWER CORP COM 03027X100 15,020 15,020 -4.63 1,706 -4.53 0.0229
2016-05-12 2016-03-31 13F AMERICAN TOWER CORP COM 03027X100 0 -12,512 -100.00 0 -100.00
2016-02-12 2015-12-31 13F AMERICAN TOWER CORP COM 03027X100 12,512 12,512 0.00 1,213 0.0073
2015-12-09 2015-09-30 13F/A-1 AMERICAN TOWER CORP COM 03027X100 0 -94,050 -100.00 0 -100.00
2015-08-10 2015-06-30 13F AMERICAN TOWER CORP COM 03027X100 94,050 -109,560 -53.81 8,775 -54.26 0.0475
2015-05-14 2015-03-31 13F AMERICAN TOWER CORP COM 03027X100 203,610 -133,372 -39.58 19,185 -42.43 0.0963
2015-02-17 2014-12-31 13F AMERICAN TOWER CORP COM 03027X100 336,982 204,508 154.38 33,324 168.61 0.1569
2014-11-14 2014-09-30 13F AMERICAN TOWER CORP NEW COM COM 03027X100 132,474 24,930 23.18 12,406 28.23 0.0720
2014-08-14 2014-06-30 13F AMERICAN TOWER CORP COM 03027X100 107,544 -11,967 -10.01 9,675 -1.14 0.0489
2014-05-14 2014-03-31 13F AMERICAN TOWER CORP NEW COM COM 03027X100 119,511 -93,011 -43.77 9,787 -42.28 0.0517
2014-02-14 2013-12-31 13F AMERICAN TOWER CORP COM 03027X100 212,522 43,162 25.49 16,957 35.01 0.0854
2013-11-13 2013-09-30 13F AMERICAN TOWER CORP COM 03027X100 169,360 42,052 33.03 12,560 34.82 0.0631
2013-08-14 2013-06-30 13F AMERICAN TOWER CORP COM 03027X100 127,308 75,003 143.40 9,316 131.51 0.0492
2013-05-30 2013-03-31 13F/A-1 AMERICAN TOWER CORP COM 03027X100 52,305 52,305 4,024 0.0585
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.