American Tower Corporation
US ˙ NYSE ˙ US03027X1000

SecurityAMT / American Tower Corporation
InstitutionNeuberger Berman Group LLC
Latest Disclosed Ownership1,068,844 shares
Latest Disclosed Value $ 184,461,095
Neuberger Berman Group LLC reports 28.10% decrease in ownership of AMT / American Tower Corporation

On May 14, 2026 - Neuberger Berman Group LLC filed a 13F-HR form disclosing ownership of 1,068,844 shares of American Tower Corporation (US:AMT) valued at $184,461,098 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 1,486,612 shares of American Tower Corporation. This represents a change in shares of -28.10% during the quarter. The current value of the position is $207,483,997 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)
2026-05-14 2026-03-31 13F AMERICAN TOWER REIT CORP REIT COMMON 03027X100 1,068,844 -417,768 -28.10 184,461 -29.33 0.0718
2026-02-13 2025-12-31 13F AMERICAN TOWER REIT CORP REIT COMMON 03027X100 1,486,612 -219,661 -12.87 261,005 -20.46 0.1943
2025-11-12 2025-09-30 13F AMERICAN TOWER REIT CORP REIT COMMON 03027X100 1,706,273 -47,892 -2.73 328,150 -15.36 0.2398
2025-08-25 2025-06-30 13F/A-1 AMERICAN TOWER REIT CORP REIT COMMON 03027X100 1,754,165 335,420 23.64 387,706 25.59 0.2983
2025-08-13 2025-06-30 13F AMERICAN TOWER REIT CORP REIT COMMON 03027X100 1,754,165 335,420 387,706 0.1543
2025-05-13 2025-03-31 13F AMERICAN TOWER REIT CORP REIT COMMON 03027X100 1,418,745 -115,590 -7.53 308,719 9.71 0.2586
2025-02-13 2024-12-31 13F AMERICAN TOWER REIT CORP REIT COMMON 03027X100 1,534,335 -168,305 -9.88 281,392 -28.94 0.2234
2024-11-14 2024-09-30 13F AMERICAN TOWER REIT CORP REIT COMMON 03027X100 1,702,640 16,615 0.99 395,966 20.84 0.3090
2024-11-14 2024-06-30 13F/A-1 AMERICAN TOWER REIT CORP REIT COMMON 03027X100 1,686,025 -5,512 -0.33 327,692 -1.95 0.2690
2024-08-13 2024-06-30 13F AMERICAN TOWER REIT CORP REIT COMMON 03027X100 1,686,025 -5,512 327,692 0.2689
2024-11-14 2024-03-31 13F/A-1 AMERICAN TOWER REIT CORP REIT COMMON 03027X100 1,691,537 51,743 3.16 334,196 -5.58 0.2762
2024-05-13 2024-03-31 13F AMERICAN TOWER REIT CORP REIT COMMON 03027X100 1,691,537 51,743 334,196 0.2762
2024-11-14 2023-12-31 13F/A-2 AMERICAN TOWER REIT CORP REIT COMMON 03027X100 1,639,794 -95,304 -5.49 353,958 24.05 0.3086
2024-02-09 2023-12-31 13F AMERICAN TOWER REIT CORP REIT COMMON 03027X100 1,639,794 -95,304 353,958 0.3086
2023-11-14 2023-09-30 13F AMERICAN TOWER REIT CORP REIT COMMON 03027X100 1,735,098 -97,640 -5.33 285,333 -19.72 0.2600
2023-08-11 2023-06-30 13F AMERICAN TOWER REIT CORP REIT COMMON 03027X100 1,832,738 -106,362 -5.49 355,414 -10.29 0.3178
2023-05-12 2023-03-31 13F AMERICAN TOWER REIT CORP REIT COMMON 03027X100 1,939,100 15,409 0.80 396,194 -2.79 0.3674
2023-02-13 2022-12-31 13F AMERICAN TOWER REIT CORP REIT COMMON 03027X100 1,923,691 -161,866 -7.76 407,586 -8.98 0.3996
2022-11-15 2022-09-30 13F AMERICAN TOWER REIT CORP REIT COMMON 03027X100 2,085,557 -13,622 -0.65 447,786 -16.54 0.4675
2022-08-15 2022-06-30 13F AMERICAN TOWER REIT CORP REIT COMMON 03027X100 2,099,179 20,355 0.98 536,521 2.73 0.5392
2022-05-23 2022-03-31 13F/A-1 AMERICAN TOWER REIT CORP REIT COMMON 03027X100 2,078,824 189,319 10.02 522,243 -5.24 0.4425
2022-05-13 2022-03-31 13F AMERICAN TOWER REIT CORP REIT COMMON 03027X100 2,078,824 189,319 520,851 0.2323
2022-02-11 2021-12-31 13F AMERICAN TOWER REIT CORP REIT COMMON 03027X100 1,889,505 -22,608 -1.18 551,149 8.89 0.4324
2021-11-12 2021-09-30 13F AMERICAN TOWER REIT CORP REIT COMMON 03027X100 1,912,113 56,765 3.06 506,143 1.22 0.4425
2021-08-13 2021-06-30 13F AMERICAN TOWER REIT CORP REIT COMMON 03027X100 1,855,348 132,974 7.72 500,032 21.52 0.4364
2021-05-13 2021-03-31 13F AMERICAN TOWER REIT CORP REIT COMMON 03027X100 1,722,374 144,127 9.13 411,487 16.19 0.3930
2021-02-10 2020-12-31 13F AMERICAN TOWER REIT CORP REIT COMMON 03027X100 1,578,247 91,217 6.13 354,147 -1.45 0.3672
2020-11-12 2020-09-30 13F AMERICAN TOWER REIT CORP REIT COMMON 03027X100 1,487,030 33,176 2.28 359,366 -4.37 0.4262
2020-08-13 2020-06-30 13F AMERICAN TOWER REIT CORP REIT COMMON 03027X100 1,453,854 -19,566 -1.33 375,798 17.13 0.4672
2020-05-14 2020-03-31 13F AMERICAN TOWER REIT CORP REIT COMMON 03027X100 1,473,420 -50,247 -3.30 320,837 -8.38 0.4891
2020-02-12 2019-12-31 13F AMERICAN TOWER REIT CORP REIT COMMON 03027X100 1,523,667 20,642 1.37 350,169 5.36 0.4087
2019-11-13 2019-09-30 13F AMERICAN TOWER REIT CORP REIT COMMON 03027X100 1,503,025 14,446 0.97 332,364 9.21 0.4059
2019-08-13 2019-06-30 13F AMERICAN TOWER REIT CORP REIT COMMON 03027X100 1,488,579 -16,052 -1.07 304,340 2.64 0.3640
2019-05-13 2019-03-31 13F AMERICAN TOWER REIT CORP REIT COMMON 03027X100 1,504,631 -30,603 -1.99 296,503 22.09 0.3633
2019-02-12 2018-12-31 13F AMERICAN TOWER REIT CORP REIT COMMON 03027X100 1,535,234 -70,807 -4.41 242,859 4.07 0.3385
2018-11-16 2018-09-30 13F/A-1 AMERICAN TOWER REIT CORP REIT COMMON 03027X100 1,606,041 -35,524 -2.16 233,357 -1.67 0.2644
2018-11-13 2018-09-30 13F AMERICAN TOWER REIT CORP REIT COMMON 03027X100 1,606,041 -35,524 233,357
2018-08-13 2018-06-30 13F AMERICAN TOWER REIT CORP REIT COMMON 03027X100 1,641,565 -39,198 -2.33 237,318 -3.07 0.2620
2018-05-08 2018-03-31 13F AMERICAN TOWER REIT CORP REIT Common 03027X100 1,680,763 -11,701 -0.69 244,837 1.16 0.2798
2018-02-14 2017-12-31 13F AMERICAN TOWER REIT CORP REIT COMMON 03027X100 1,692,464 -27,908 -1.62 242,041 2.93 0.2782
2017-11-15 2017-09-30 13F AMERICAN TOWER COMMON STOCK 03027X100 1,720,372 56,714 3.41 235,140 6.82 0.2941
2017-08-08 2017-06-30 13F AMERICAN TOWER COMMON STOCK 03027X100 1,663,658 -90,208 -5.14 220,135 3.27 0.2827
2017-05-10 2017-03-31 13F AMERICAN TOWER COMMON STOCK 03027X100 1,753,866 -343,752 -16.39 213,165 -3.84 0.2751
2017-02-06 2016-12-31 13F AMERICAN TOWER COMMON STOCK 03027X100 2,097,618 -111,720 -5.06 221,676 -11.47 0.2977
2016-11-02 2016-09-30 13F AMERICAN TOWER COMMON STOCK 03027X100 2,209,338 -287,718 -11.52 250,384 -11.74 0.3397
2016-08-05 2016-06-30 13F AMERICAN TOWER COMMON STOCK 03027X100 2,497,056 -415,468 -14.26 283,690 -4.85 0.3909
2016-05-06 2016-03-31 13F AMERICAN TOWER COMMON STOCK 03027X100 2,912,524 -331,689 -10.22 298,155 -5.20 0.4099
2016-01-28 2015-12-31 13F AMERICAN TOWER COMMON STOCK 03027X100 3,244,213 -260,581 -7.43 314,526 2.00 0.4118
2015-11-10 2015-09-30 13F AMERICAN TOWER COMMON STOCK 03027X100 3,504,794 -107,132 -2.97 308,352 -8.49 0.3973
2015-07-31 2015-06-30 13F AMERICAN TOWER COMMON STOCK 03027X100 3,611,926 -101,638 -2.74 336,957 -3.63 0.3747
2015-05-06 2015-03-31 13F AMERICAN TOWER COMMON STOCK 03027X100 3,713,564 3,713,564 2.81 349,632 3.76 0.3733
2015-02-05 2014-12-31 13F AMERICAN TOWER COMMON STOCK 03027X100 0 -4,863,047 -100.00 0 -100.00
2014-11-04 2014-09-30 13F AMERICAN TOWER COMMON STOCK 03027X100 4,863,047 -410,214 -7.78 455,327 -4.04 0.4673
2014-08-05 2014-06-30 13F AMERICAN TOWER COMMON STOCK 03027X100 5,273,261 -88,527 -1.65 474,488 8.09 0.4633
2014-05-05 2014-03-31 13F AMERICAN TOWER COMMON STOCK 03027X100 5,361,788 -115,732 -2.11 438,969 0.40 0.4465
2014-02-11 2013-12-31 13F AMERICAN TOWER COMMON STOCK 03027X100 5,477,520 -113,649 -2.03 437,215 5.49 0.4494
2013-10-29 2013-09-30 13F/A-1 AMERICAN TOWER COMMON STOCK 03027X100 5,591,169 173,165 3.20 414,473 4.55 0.4602
2013-10-29 2013-09-30 13F AMERICAN TOWER COMMON STOCK 03027X100 5,109,931 322,028
2013-08-13 2013-06-30 13F AMERICAN TOWER COMMON STOCK 03027X100 5,418,004 5,418,004 396,435 0.4714
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.