American Tower Corporation
US ˙ NYSE ˙ US03027X1000

SecurityAMT / American Tower Corporation
InstitutionTownsquare Capital Llc
Latest Disclosed Ownership2,980 shares
Latest Disclosed Value $ 514,288
Townsquare Capital Llc reports 7.93% increase in ownership of AMT / American Tower Corporation

On May 13, 2026 - Townsquare Capital Llc filed a 13F-HR form disclosing ownership of 2,980 shares of American Tower Corporation (US:AMT) valued at $514,288 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 2,761 shares of American Tower Corporation. This represents a change in shares of 7.93% during the quarter. The current value of the position is $577,852 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)
2026-05-13 2026-03-31 13F AMERICAN TOWER COM 03027X100 2,980 219 7.93 514 6.20 0.0489
2026-02-11 2025-12-31 13F AMERICAN TOWER CORP COM 03027X100 2,761 26 0.95 485 -7.81 0.1087
2026-02-11 2025-12-31 13F AMERICAN TOWER CORP COM 03027X100 2,761 485
2026-02-11 2025-12-31 13F AMERICAN TOWER CORP COM 03027X100 2,761 485
2026-02-11 2025-12-31 13F AMERICAN TOWER CORP COM 03027X100 2,761 485
2026-02-11 2025-12-31 13F AMERICAN TOWER CORP COM 03027X100 2,761 485
2026-02-11 2025-12-31 13F AMERICAN TOWER CORP COM 03027X100 2,761 485
2025-11-03 2025-09-30 13F AMERICAN TOWER CORP COM 03027X100 2,735 -2,695 -49.63 526 -56.25 0.0796
2025-08-13 2025-06-30 13F AMERICAN TOWER CORP COM 03027X100 5,430 -55,465 -91.08 1,200 -90.94 0.1169
2025-05-12 2025-03-31 13F AMERICAN TOWER CORP COM 03027X100 60,895 7,332 13.69 13,251 34.87 0.1411
2025-02-13 2024-12-31 13F AMERICAN TOWER CORP COM 03027X100 53,563 -2,082 -3.74 9,824 -24.08 0.1109
2024-11-13 2024-09-30 13F AMERICAN TOWER CORP COM 03027X100 55,645 1,924 3.58 12,941 23.92 0.1550
2024-08-14 2024-06-30 13F AMERICAN TOWER CORP COM 03027X100 53,721 19,804 58.39 10,442 55.83 0.1424
2024-05-15 2024-03-31 13F AMERICAN TOWER CORP COM 03027X100 33,917 25,848 320.34 6,702 284.89 0.0982
2024-02-15 2023-12-31 13F AMERICAN TOWER CORP COM 03027X100 8,069 -6,356 -44.06 1,742 -26.60 0.0299
2023-11-15 2023-09-30 13F AMERICAN TOWER CORP COM 03027X100 14,425 1,323 10.10 2,372 -6.65 0.0433
2023-11-13 2023-06-30 13F AMERICAN TOWER CORP COM 03027X100 13,102 4,484 52.03 2,541 44.29 0.0463
2023-05-11 2023-03-31 13F AMERICAN TOWER CORP COM 03027X100 8,618 1,032 13.60 1,761 9.58 0.0388
2023-02-13 2022-12-31 13F AMERICAN TOWER CORP COM 03027X100 7,586 1,491 24.46 1,607 22.77 0.0398
2022-11-14 2022-09-30 13F AMERICAN TOWER CORP COM 03027X100 6,095 530 9.52 1,309 -7.95 0.0375
2022-08-08 2022-06-30 13F AMERICAN TOWER CORP COM 03027X100 5,565 386 7.45 1,422 9.22 0.0404
2022-04-28 2022-03-31 13F AMERICAN TOWER CORP COM 03027X100 5,179 1,363 35.72 1,302 16.67 0.0241
2022-02-11 2021-12-31 13F AMERICAN TOWER CORP COM 03027X100 3,816 819 27.33 1,116 40.38 0.0280
2021-11-15 2021-09-30 13F AMERICAN TOWER CORP COM 03027X100 2,997 699 30.42 795 25.39 0.0229
2021-08-16 2021-06-30 13F AMERICAN TOWER CORP COM 03027X100 2,298 983 74.75 634 101.91 0.0205
2021-05-17 2021-03-31 13F AMERICAN TOWER CORP COM 03027X100 1,315 -860 -39.54 314 -35.66 0.0122
2021-02-16 2020-12-31 13F AMERICAN TOWER CORP COM 03027X100 2,175 -10 -0.46 488 -7.22 0.0217
2020-12-01 2020-09-30 13F/A-2 AMERICAN TOWER CORP COM 03027X100 2,185 696 46.74 526 38.06 0.0307
2020-11-16 2020-09-30 13F AMERICAN TOWER CORP COM 03027X100 1,489 0 381 9,689.9792
2020-08-17 2020-06-30 13F AMERICAN TOWER CORP COM 03027X100 1,489 -871 -36.91 381 -31.10 0.0259
2020-05-18 2020-03-31 13F AMERICAN TOWER CORP COM 03027X100 2,360 -101 -4.10 553 -2.12 0.0447
2020-05-18 2019-12-31 13F AMERICAN TOWER CORP COM 03027X100 2,461 -56 -2.22 565 9.07 0.0459
2019-11-14 2019-09-30 13F AMERICAN TOWER CORP COM 03027X100 2,517 -145 -5.45 518 -9.76 0.0428
2019-08-15 2019-06-30 13F AMERICAN TOWER CORP COM 03027X100 2,662 169 6.78 574 16.90 0.0546
2019-05-15 2019-03-31 13F AMERICAN TOWER CORP COM 03027X100 2,493 5 0.20 491 14.45 0.0379
2019-02-12 2018-12-31 13F AMERICAN TOWER CORP COM 03027X100 2,488 2,488 429 0.0558
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.