American Tower Corporation
MX ˙ BMV ˙ US03027X1000
SecurityMX:AMT / American Tower Corporation
InstitutionCigna Investments Inc /new
Latest Disclosed Ownership4,461 shares
Latest Disclosed Value $ 770
Cigna Investments Inc /new ownership in AMT / American Tower Corporation

On May 11, 2026 - Cigna Investments Inc /new filed a 13F-HR form disclosing ownership of 4,461 shares of American Tower Corporation (MX:AMT) valued at $770 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 20, 2026 disclosing 4,461 shares of American Tower Corporation.

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 Common Stock 03027X100 4,461 0 0.00 1 0.1185
2026-01-20 2025-12-31 13F AMERICAN TOWER Common Stock 03027X100 4,461 -134 -2.92 1 0.1129
2025-10-22 2025-09-30 13F AMERICAN TOWER Common Stock 03027X100 4,595 0 0.00 1 -100.00 0.1245
2025-07-15 2025-06-30 13F AMERICAN TOWER Common Stock 03027X100 4,595 -67 -1.44 1 0.00 0.1729
2025-05-15 2025-03-31 13F AMERICAN TOWER Common Stock 03027X100 4,662 -123 -2.57 1 0.1886
2025-01-29 2024-12-31 13F AMERICAN TOWER Common Stock 03027X100 4,785 -30 -0.62 1 -100.00 0.1532
2024-10-28 2024-09-30 13F AMERICAN TOWER Common Stock 03027X100 4,815 -71 -1.45 1 0.1972
2024-07-17 2024-06-30 13F AMERICAN TOWER Common Stock 03027X100 4,886 -33 -0.67 1 0.1758
2024-04-23 2024-03-31 13F AMERICAN TOWER Common Stock 03027X100 4,919 -60 -1.21 1 -100.00 0.1829
2024-01-22 2023-12-31 13F AMERICAN TOWER Common Stock 03027X100 4,979 -12 -0.24 1 0.2210
2023-10-23 2023-09-30 13F AMERICAN TOWER Common Stock 03027X100 4,991 -639 -11.35 1 -100.00 0.1871
2023-08-01 2023-06-30 13F AMERICAN TOWER Common Stock 03027X100 5,630 -19 -0.34 1 0.00 0.2025
2023-05-11 2023-03-31 13F AMERICAN TOWER Common Stock 03027X100 5,649 -118 -2.05 1 0.00 0.2295
2023-02-13 2022-12-31 13F AMERICAN TOWER Common Stock 03027X100 5,767 48 0.84 1 0.00 0.2539
2022-11-14 2022-09-30 13F AMERICAN TOWER Common Stock 03027X100 5,719 -251 -4.20 1 0.00 0.2715
2022-08-15 2022-06-30 13F AMERICAN TOWER Common Stock 03027X100 5,970 -2,064 -25.69 2 -50.00 0.3034
2022-05-13 2022-03-31 13F AMERICAN TOWER Common Stock 03027X100 8,034 -2,282 -22.12 2 -33.33 0.2477
2022-02-14 2021-12-31 13F AMERICAN TOWER Common Stock 03027X100 10,316 -3,658 -26.18 3 0.00 0.2359
2021-11-12 2021-09-30 13F AMERICAN TOWER Common Stock 03027X100 13,974 -243 -1.71 4 0.00 0.2766
2021-08-10 2021-06-30 13F AMERICAN TOWER Common Stock 03027X100 14,217 -1,805 -11.27 4 0.00 0.2742
2021-05-10 2021-03-31 13F AMERICAN TOWER Common Stock 03027X100 16,022 412 2.64 4 0.00 0.2632
2021-02-11 2020-12-31 13F AMERICAN TOWER Common Stock 03027X100 15,610 1,252 8.72 4 0.00 0.2706
2020-11-12 2020-09-30 13F AMERICAN TOWER Common Stock 03027X100 14,358 -3,410 -19.19 3 -99.93 0.3346
2020-08-17 2020-06-30 13F AMERICAN TOWER Common Stock 03027X100 17,768 5,212 41.51 4,594 67.97 0.4340
2020-05-11 2020-03-31 13F AMERICAN TOWER Common Stock 03027X100 12,556 806 6.86 2,735 0.44 0.3522
2020-02-04 2019-12-31 13F AMERICAN TOWER Common Stock 03027X100 11,750 -1,238 -9.53 2,723 -3.88 0.2881
2019-11-07 2019-09-30 13F AMERICAN TOWER Common Stock 03027X100 12,988 529 4.25 2,833 7.39 0.2924
2019-08-12 2019-06-30 13F AMERICAN TOWER Common Stock 03027X100 12,459 -250 -1.97 2,638 5.35 0.2863
2019-05-10 2019-03-31 13F AMERICAN TOWER Common Stock 03027X100 12,709 -263 -2.03 2,504 22.09 0.2770
2019-02-06 2018-12-31 13F AMERICAN TOWER Common Stock 03027X100 12,972 124 0.97 2,051 2.50 0.1738
2018-11-13 2018-09-30 13F AMERICAN TOWER Common Stock 03027X100 12,848 -1,186 -8.45 2,001 -1.09 0.1605
2018-08-14 2018-06-30 13F AMERICAN TOWER Common Stock 03027X100 14,034 -1,707 -10.84 2,023 -11.58 0.1462
2018-05-09 2018-03-31 13F AMERICAN TOWER Common Stock 03027X100 15,741 -135 -0.85 2,288 1.02 0.1534
2018-01-26 2017-12-31 13F AMERICAN TOWER Common Stock 03027X100 15,876 -300 -1.85 2,265 2.44 0.1479
2017-10-11 2017-09-30 13F AMERICAN TOWER COM 03027X100 16,176 -375 -2.27 2,211 0.45 0.1473
2017-08-01 2017-06-30 13F AMERICAN TOWER CORP 03027X100 COM 03027X100 16,551 -942 -5.39 2,201 3.53 0.1513
2017-05-15 2017-03-31 13F AMERICAN TOWER CORP 03027X100 COM 03027X100 17,493 1,780 11.33 2,126 28.00 0.1463
2017-02-15 2016-12-31 13F AMERICAN TOWER CORP 03027X100 COM 03027X100 15,713 15,713 1,661 0.1810
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.