American Tower Corporation
US ˙ NYSE ˙ US03027X1000

SecurityAMT / American Tower Corporation
InstitutionCAPROCK Group, Inc.
Latest Disclosed Ownership1,422 shares
Latest Disclosed Value $ 245,575
CAPROCK Group, Inc. reports 67.34% decrease in ownership of AMT / American Tower Corporation

On May 11, 2026 - CAPROCK Group, Inc. filed a 13F-HR form disclosing ownership of 1,422 shares of American Tower Corporation (US:AMT) valued at $245,409 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 28, 2026 disclosing 4,354 shares of American Tower Corporation. This represents a change in shares of -67.34% during the quarter. The current value of the position is $259,145 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 1,422 -2,932 -67.34 246 -68.22 0.0060
2026-01-28 2025-12-31 13F AMERICAN TOWER CORP COM 03027X100 4,354 -11,063 -71.76 772 -75.46 0.0163
2025-11-06 2025-09-30 13F AMERICAN TOWER CORP COM 03027X100 15,417 1,507 10.83 3,143 3.83 0.0774
2025-05-15 2025-03-31 13F AMERICAN TOWER CORP COM 03027X100 13,910 860 6.59 3,027 25.46 0.0923
2025-01-23 2024-12-31 13F AMERICAN TOWER CORP COM 03027X100 13,050 1,999 18.09 2,413 -6.15 0.0789
2024-11-07 2024-09-30 13F AMERICAN TOWER CORP COM 03027X100 11,051 3,524 46.82 2,570 74.24 0.0935
2024-08-06 2024-06-30 13F AMERICAN TOWER CORP COM 03027X100 7,527 569 8.18 1,475 7.35 0.0600
2024-04-29 2024-03-31 13F AMERICAN TOWER CORP COM 03027X100 6,958 759 12.24 1,375 1.93 0.0788
2024-01-18 2023-12-31 13F AMERICAN TOWER CORP COM 03027X100 6,199 -314 -4.82 1,349 25.86 0.0862
2023-10-18 2023-09-30 13F AMERICAN TOWER CORP COM 03027X100 6,513 743 12.88 1,071 -5.05 0.0810
2023-08-10 2023-06-30 13F AMERICAN TOWER CORP COM 03027X100 5,770 418 7.81 1,129 3.20 0.0829
2023-04-26 2023-03-31 13F AMERICAN TOWER CORP COM 03027X100 5,352 324 6.44 1,094 1.96 0.0848
2023-01-23 2022-12-31 13F AMERICAN TOWER CORP COM 03027X100 5,028 870 20.92 1,073 20.04 0.0999
2022-11-07 2022-09-30 13F AMERICAN TOWER CORP COM 03027X100 4,158 -241 -5.48 893 -20.97 0.0860
2022-07-26 2022-06-30 13F AMERICAN TOWER CORP COM 03027X100 4,399 731 19.93 1,130 22.56 0.1109
2022-04-12 2022-03-31 13F AMERICAN TOWER CORP COM 03027X100 3,668 17 0.47 922 -14.07 0.0867
2022-01-18 2021-12-31 13F AMERICAN TOWER CORP COM 03027X100 3,651 517 16.50 1,073 28.35 0.0885
2021-10-07 2021-09-30 13F AMERICAN TOWER CORP COM 03027X100 3,134 -728 -18.85 836 -20.23 0.0747
2021-08-13 2021-06-30 13F AMERICAN TOWER CORP COM 03027X100 3,862 812 26.62 1,048 43.76 0.0954
2021-04-29 2021-03-31 13F AMERICAN TOWER CORP COM 03027X100 3,050 354 13.13 729 19.90 0.0797
2021-01-29 2020-12-31 13F AMERICAN TOWER CORP COM 03027X100 2,696 -768 -22.17 608 -27.71 0.0693
2020-10-29 2020-09-30 13F AMERICAN TOWER CORP COM 03027X100 3,464 863 33.18 841 24.59 0.1151
2020-08-05 2020-06-30 13F AMERICAN TOWER CORP COM 03027X100 2,601 413 18.88 675 41.81 0.1014
2020-04-28 2020-03-31 13F AMERICAN TOWER CORP COM 03027X100 2,188 244 12.55 476 6.01 0.0901
2020-02-04 2019-12-31 13F AMERICAN TOWER CORP COM 03027X100 1,944 327 20.22 449 25.07 0.0803
2019-10-31 2019-09-30 13F AMERICAN TOWER CORP COM 03027X100 1,617 93 6.10 359 14.70 0.0701
2019-07-23 2019-06-30 13F AMERICAN TOWER CORP COM 03027X100 1,524 -931 -37.92 313 -35.33 0.0612
2019-04-12 2019-03-31 13F AMERICAN TOWER CORP COM 03027X100 2,455 -314 -11.34 484 10.00 0.0940
2019-01-29 2018-12-31 13F AMERICAN TOWER CORP COM 03027X100 2,769 70 2.59 440 11.68 0.1013
2018-10-17 2018-09-30 13F AMERICAN TOWER CORP COM 03027X100 2,699 -102 -3.64 394 -2.96 0.0801
2018-07-23 2018-06-30 13F AMERICAN TOWER CORP COM 03027X100 2,801 108 4.01 406 3.84 0.0859
2018-04-23 2018-03-31 13F AMERICAN TOWER CORP COM 03027X100 2,693 341 14.50 391 24.92 0.0835
2018-01-17 2017-12-31 13F AMERICAN TOWER CORP COM 03027X100 2,352 379 19.21 313 15.50 0.0609
2017-10-23 2017-09-30 13F AMERICAN TOWER CORP COM 03027X100 1,973 1,973 -16.11 271 -13.42 0.0565
2017-01-24 2016-12-31 13F AMERICAN TOWER CORP COM 03027X100 0 -2,332 -100.00 0 -100.00
2016-11-15 2016-09-30 13F AMERICAN TOWER CORP COM 03027X100 2,332 103 4.62 264 4.35 0.0599
2016-08-25 2016-06-30 13F AMERICAN TOWER CORP COM 03027X100 2,229 0 0.00 253 10.96 0.0617
2016-05-11 2016-03-31 13F AMERICAN TOWER CORP COM 03027X100 2,229 2,229 228 0.0541
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.