American Tower Corporation
US ˙ NYSE ˙ US03027X1000

SecurityAMT / American Tower Corporation
InstitutionCincinnati Financial Corp
Latest Disclosed Ownership201,619 shares
Latest Disclosed Value $ 34,795,407
Cincinnati Financial Corp ownership in AMT / American Tower Corporation

On May 11, 2026 - Cincinnati Financial Corp filed a 13F-HR form disclosing ownership of 201,619 shares of American Tower Corporation (US:AMT) valued at $34,795,407 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 201,619 shares of American Tower Corporation. This represents a change in shares of 0.00% during the quarter. The current value of the position is $39,095,940 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 REIT COMMON 03027X100 201,619 0 0.00 34,795 -1.70 0.7010
2026-02-12 2025-12-31 13F AMERICAN TOWER REIT COMMON 03027X100 201,619 0 0.00 35,398 -8.71 0.6910
2025-11-06 2025-09-30 13F AMERICAN TOWER REIT COMMON 03027X100 201,619 0 0.00 38,775 -12.98 0.7675
2025-08-07 2025-06-30 13F AMERICAN TOWER REIT COMMON 03027X100 201,619 0 0.00 44,562 1.57 0.9443
2025-05-08 2025-03-31 13F AMERICAN TOWER REIT COMMON 03027X100 201,619 0 0.00 43,872 18.64 0.9795
2025-02-12 2024-12-31 13F AMERICAN TOWER REIT COMMON 03027X100 201,619 0 0.00 36,979 -21.14 0.8104
2024-11-07 2024-09-30 13F AMERICAN TOWER REIT COMMON 03027X100 201,619 0 0.00 46,889 19.64 1.0107
2024-08-08 2024-06-30 13F AMERICAN TOWER REIT COMMON 03027X100 201,619 0 0.00 39,191 -1.62 0.8442
2024-05-03 2024-03-31 13F AMERICAN TOWER REIT COMMON 03027X100 201,619 -61,981 -23.51 39,838 -29.99 0.8770
2024-02-08 2023-12-31 13F AMERICAN TOWER REIT COMMON 03027X100 263,600 0 0.00 56,906 31.27 1.2530
2023-11-03 2023-09-30 13F AMERICAN TOWER REIT COMMON 03027X100 263,600 0 0.00 43,349 -15.20 1.0465
2023-08-08 2023-06-30 13F AMERICAN TOWER REIT COMMON 03027X100 263,600 0 0.00 51,123 -5.09 1.1719
2023-05-05 2023-03-31 13F AMERICAN TOWER REIT COMMON 03027X100 263,600 0 0.00 53,864 -3.55 1.3069
2023-02-09 2022-12-31 13F AMERICAN TOWER REIT COMMON 03027X100 263,600 0 0.00 55,846 -1.32 1.4053
2022-11-08 2022-09-30 13F AMERICAN TOWER REIT COMMON 03027X100 263,600 54,981 26.35 56,595 6.14 1.5513
2022-08-05 2022-06-30 13F AMERICAN TOWER REIT COMMON 03027X100 208,619 7,000 3.47 53,321 5.27 1.3594
2022-05-12 2022-03-31 13F AMERICAN TOWER REIT COMMON 03027X100 201,619 0 0.00 50,651 -14.11 1.1232
2022-02-11 2021-12-31 13F AMERICAN TOWER REIT COMMON 03027X100 201,619 0 0.00 58,974 10.21 1.2354
2021-11-05 2021-09-30 13F AMERICAN TOWER REIT COMMON 03027X100 201,619 0 0.00 53,512 -1.75 1.3140
2021-08-06 2021-06-30 13F AMERICAN TOWER REIT COMMON 03027X100 201,619 0 0.00 54,465 13.00 1.3300
2021-05-06 2021-03-31 13F AMERICAN TOWER REIT COMMON 03027X100 201,619 0 0.00 48,199 6.51 1.2500
2021-02-12 2020-12-31 13F AMERICAN TOWER REIT COMMON 03027X100 201,619 0 0.00 45,255 -7.14 1.2278
2020-11-06 2020-09-30 13F AMERICAN TOWER REIT COMMON 03027X100 201,619 0 0.00 48,737 -6.50 1.4858
2020-08-06 2020-06-30 13F AMERICAN TOWER REIT COMMON 03027X100 201,619 0 0.00 52,127 18.73 1.7484
2020-05-08 2020-03-31 13F AMERICAN TOWER REIT COMMON 03027X100 201,619 0 0.00 43,903 -5.25 1.7577
2020-02-11 2019-12-31 13F AMERICAN TOWER REIT COMMON 03027X100 201,619 0 0.00 46,336 3.93 1.5106
2019-11-05 2019-09-30 13F AMERICAN TOWER REIT COMMON 03027X100 201,619 0 0.00 44,584 8.16 1.5907
2019-08-07 2019-06-30 13F AMERICAN TOWER REIT COMMON 03027X100 201,619 7,500 3.86 41,221 7.76 1.5098
2019-05-03 2019-03-31 13F AMERICAN TOWER REIT COMMON 03027X100 194,119 0 0.00 38,253 24.57 1.5443
2019-02-11 2018-12-31 13F AMERICAN TOWER REIT COMMON 03027X100 194,119 0 0.00 30,708 8.87 1.3753
2018-11-06 2018-09-30 13F AMERICAN TOWER REIT COMMON 03027X100 194,119 110,000 130.77 28,205 132.58 1.0972
2018-08-13 2018-06-30 13F AMERICAN TOWER REIT COMMON 03027X100 84,119 0 0.00 12,127 -0.81 0.5153
2018-05-10 2018-03-31 13F AMERICA TOWER COMMON 03027X100 84,119 84,119 12,226 0.5326
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.