아메리칸 타워 코퍼레이션
MX ˙ BMV ˙ US03027X1000
SecurityMX:AMT / American Tower Corporation
InstitutionCapital Fund Management S.a.
Latest Disclosed Ownership171,400 shares
Latest Disclosed Value $ 29,580,212
Capital Fund Management S.a. ownership in AMT / American Tower Corporation

On May 14, 2026 - Capital Fund Management S.a. filed a 13F-HR form disclosing ownership of 171,400 shares of American Tower Corporation (MX:AMT) valued at $29,580,212 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 51,864 shares of American Tower Corporation. This represents a change in shares of 230.48% during the quarter.

Capital Fund Management S.a. has a history of taking positions in derivatives of the underlying security (AMT) in the form of stock options. The firm currently holds call options representing 51,900 of underlying shares valued at $8,956,902 USD and put options representing 69,500 of underlying shares valued at $11,994,310 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

MX:AMT / American Tower Corporation Historical Put/Call Ratio
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 CORP COM AMERICAN TOWER CORP COM 03027X100 171,400 119,536 230.48 29,580 224.88 0.1337
2026-02-17 2025-12-31 13F AMERICAN TOWER CORP NEW COM AMERICAN TOWER CORP NEW COM 03027X100 51,864 -32,841 -38.77 9,106 -44.11 0.0253
2025-11-13 2025-09-30 13F AMERICAN TOWER CORP COM 03027X100 84,705 -2,971 -3.39 16,290 -15.94 0.0427
2025-08-13 2025-06-30 13F AMERICAN TOWER CORP COM 03027X100 87,676 87,676 19,378 0.0534
2025-05-14 2025-03-31 13F AMERICAN TOWER CORP COM 03027X100 0 -37,838 -100.00 0 -100.00
2025-02-13 2024-12-31 13F AMERICAN TOWER CORP COM 03027X100 37,838 37,838 6,940 0.0177
2024-11-13 2024-09-30 13F AMERICAN TOWER CORP COM 03027X100 0 -56,663 -100.00 0 -100.00
2024-08-13 2024-06-30 13F AMERICAN TOWER CORP COM 03027X100 56,663 56,663 11,014 0.0324
2024-02-14 2023-12-31 13F AMERICAN TOWER CORP COM 03027X100 0 -81,621 -100.00 0 -100.00
2023-11-14 2023-09-30 13F AMERICAN TOWER CORP COM 03027X100 81,621 81,621 13,423 0.0464
2021-11-12 2021-09-30 13F AMERICAN TOWER CORP COM 03027X100 0 -13,468 -100.00 0 -100.00
2021-08-12 2021-06-30 13F AMERICAN TOWER CORP COM 03027X100 13,468 -17,380 -56.34 3,638 -50.66 0.0288
2021-05-14 2021-03-31 13F AMERICAN TOWER CORP COM 03027X100 30,848 30,848 129.05 7,375 102.69 0.0815
2020-05-13 2020-03-31 13F American Tower COM 03027X100 0 -126,087 -100.00 0 -100.00
2020-02-13 2019-12-31 13F American Tower COM 03027X100 126,087 112,487 827.11 28,977 863.65 0.2280
2019-11-13 2019-09-30 13F American Tower COM 03027X100 13,600 -73,072 -84.31 3,007 -83.03 0.0271
2019-08-12 2019-06-30 13F American Tower COM 03027X100 86,672 86,672 537.29 17,720 489.29 0.1612
2019-02-13 2018-12-31 13F American Tower COM 03027X100 0 -38,090 -100.00 0 -100.00
2018-11-14 2018-09-30 13F American Tower COM 03027X100 38,090 38,090 5,534 0.0302
2018-08-14 2018-06-30 13F American Tower COM 03027X100 0 -44,208 -100.00 0 -100.00
2018-05-15 2018-03-31 13F American Tower COM 03027X100 44,208 -29,800 -40.27 6,425 -39.15 0.0386
2018-02-09 2017-12-31 13F American Tower COM 03027X100 74,008 26,900 57.10 10,559 63.99 0.0582
2017-11-13 2017-09-30 13F American Tower COM 03027X100 47,108 47,108 -36.35 6,439 -39.02 0.0463
2017-08-10 2017-06-30 13F American Tower COM 03027X100 0 -190,263 -100.00 0 -100.00
2017-05-03 2017-03-31 13F American Tower COM 03027X100 190,263 190,263 23,125 0.1928
2016-07-27 2016-06-30 13F American Tower COM 03027X100 0 -19,801 -100.00 0 -100.00
2016-05-02 2016-03-31 13F American Tower COM 03027X100 19,801 19,801 0.00 2,027 0.0197
2015-07-28 2015-06-30 13F American Tower COM 03027X100 0 -166,755 -100.00 0 -100.00
2015-04-28 2015-03-31 13F American Tower COM 03027X100 166,755 -162,856 -49.41 15,700 -34.90 0.2141
2013-07-31 2013-06-30 13F American Tower COM 03027X100 329,611 329,611 24,118 0.3683
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2026-05-14 2026-03-31 13F AMERICAN TOWER CORP COM AMERICAN TOWER CORP COM Call 51,900 -58.87 8,957 -59.58 n/a n/a n/a
2026-02-17 2025-12-31 13F AMERICAN TOWER CORP NEW COM AMERICAN TOWER CORP NEW COM Call 126,200 59.14 22,157 45.29 n/a n/a n/a
2025-11-13 2025-09-30 13F AMERICAN TOWER CORP COM Call 79,300 36.72 15,251 18.96 n/a n/a n/a
2025-08-13 2025-06-30 13F AMERICAN TOWER CORP COM Call 58,000 136.73 12,819 140.46 n/a n/a n/a
2025-05-14 2025-03-31 13F AMERICAN TOWER CORP COM Call 24,500 -13.73 5,331 2.36 n/a n/a n/a
2025-02-13 2024-12-31 13F AMERICAN TOWER CORP COM Call 28,400 22.94 5,209 -3.05 n/a n/a n/a
2024-11-13 2024-09-30 13F AMERICAN TOWER CORP COM Call 23,100 -40.62 5,372 -28.95 n/a n/a n/a
2024-08-13 2024-06-30 13F AMERICAN TOWER CORP COM Call 38,900 -70.99 7,561 -71.46 n/a n/a n/a
2024-05-15 2024-03-31 13F AMERICAN TOWER CORP COM Call 134,100 -6.35 26,497 -14.29 n/a n/a n/a
2024-02-14 2023-12-31 13F AMERICAN TOWER CORP COM Call 143,200 -30.55 30,914 -8.83 n/a n/a n/a
2023-11-14 2023-09-30 13F AMERICAN TOWER CORP COM Call 206,200 3.15 33,910 -12.53 n/a n/a n/a
2023-08-14 2023-06-30 13F AMERICAN TOWER CORP COM Call 199,900 30.40 38,769 23.76 n/a n/a n/a
2023-05-15 2023-03-31 13F AMERICAN TOWER CORP COM Call 153,300 37.86 31,325 32.97 n/a n/a n/a
2023-02-13 2022-12-31 13F AMERICAN TOWER CORP COM Call 111,200 595.00 23,559 585.82 n/a n/a n/a
2022-11-14 2022-09-30 13F AMERICAN TOWER CORP COM Call 16,000 3,435 n/a n/a n/a
2022-08-12 2022-06-30 13F AMERICAN TOWER CORP COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2022-05-12 2022-03-31 13F AMERICAN TOWER CORP COM Call 20,000 -56.14 5,024 -62.33 n/a n/a n/a
2022-02-10 2021-12-31 13F AMERICAN TOWER CORP COM Call 45,600 -10.24 13,338 -1.07 n/a n/a n/a
2021-11-12 2021-09-30 13F AMERICAN TOWER CORP COM Call 50,800 13,483 n/a n/a n/a
2021-08-12 2021-06-30 13F AMERICAN TOWER CORP COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2021-05-14 2021-03-31 13F AMERICAN TOWER CORP COM Call 32,900 0.61 7,865 7.17 n/a n/a n/a
2021-02-12 2020-12-31 13F AMERICAN TOWER CORP COM Call 32,700 25.77 7,340 16.79 n/a n/a n/a
2020-11-13 2020-09-30 13F AMERICAN TOWER CORP COM Call 26,000 80.56 6,285 68.83 n/a n/a n/a
2020-08-13 2020-06-30 13F AMERICAN TOWER CORP COM Call 14,400 -64.36 3,723 -57.69 n/a n/a n/a
2020-05-13 2020-03-31 13F American Tower COM Call 40,400 -36.08 8,797 -39.44 n/a n/a n/a
2020-02-13 2019-12-31 13F American Tower COM Call 63,200 -71.13 14,525 -69.99 n/a n/a n/a
2019-11-13 2019-09-30 13F American Tower COM Call 218,900 2.91 48,405 11.31 n/a n/a n/a
2019-08-12 2019-06-30 13F American Tower COM Call 212,700 100.28 43,487 107.79 n/a n/a n/a
2019-05-13 2019-03-31 13F/A American Tower COM Call 106,200 2,623.08 20,928 3,291.90 n/a n/a n/a
2019-05-13 2019-03-31 13F American Tower COM Call 3,900 617 n/a n/a n/a
2019-02-13 2018-12-31 13F American Tower COM Call 3,900 -96.33 617 -97.05 n/a n/a n/a
2018-08-14 2018-06-30 13F American Tower COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2018-05-15 2018-03-31 13F American Tower COM Call 8,200 -73.46 1,192 -72.96 n/a n/a n/a
2018-02-09 2017-12-31 13F American Tower COM Call 30,900 -16.49 4,409 -12.81 n/a n/a n/a
2017-11-13 2017-09-30 13F American Tower COM Call 37,000 362.50 5,057 377.53 n/a n/a n/a
2017-08-10 2017-06-30 13F American Tower COM Call 8,000 166.67 1,059 190.14 n/a n/a n/a
2017-05-03 2017-03-31 13F American Tower COM Call 3,000 -62.50 365 -65.53 n/a n/a n/a
2017-02-08 2016-12-31 13F American Tower COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2016-10-31 2016-09-30 13F American Tower COM Call 12,500 66.67 1,417 66.31 n/a n/a n/a
2016-07-27 2016-06-30 13F American Tower COM Call 7,500 -40.00 852 -39.87 n/a n/a n/a
2015-01-28 2014-12-31 13F American Tower COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2014-10-31 2014-09-30 13F American Tower COM Call 18,800 100.00 1,760 128.57 n/a n/a n/a
2014-05-14 2014-03-31 13F American Tower COM Call 9,400 -47.19 770 -45.81 n/a n/a n/a
2014-01-31 2013-12-31 13F American Tower COM Call 17,800 394.44 1,421 432.21 n/a n/a n/a
2013-10-31 2013-09-30 13F American Tower COM Call 3,600 267 n/a n/a n/a
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2026-05-14 2026-03-31 13F AMERICAN TOWER CORP COM AMERICAN TOWER CORP COM Put 69,500 -23.71 11,994 -25.01 n/a n/a n/a
2026-02-17 2025-12-31 13F AMERICAN TOWER CORP NEW COM AMERICAN TOWER CORP NEW COM Put 91,100 77.58 15,994 62.11 n/a n/a n/a
2025-11-13 2025-09-30 13F AMERICAN TOWER CORP COM Put 51,300 3.22 9,866 -10.18 n/a n/a n/a
2025-08-13 2025-06-30 13F AMERICAN TOWER CORP COM Put 49,700 -6.58 10,985 -5.11 n/a n/a n/a
2025-05-14 2025-03-31 13F AMERICAN TOWER CORP COM Put 53,200 -11.92 11,576 4.50 n/a n/a n/a
2025-02-13 2024-12-31 13F AMERICAN TOWER CORP COM Put 60,400 154.85 11,078 101.00 n/a n/a n/a
2024-11-13 2024-09-30 13F AMERICAN TOWER CORP COM Put 23,700 -40.00 5,512 -28.22 n/a n/a n/a
2024-08-13 2024-06-30 13F AMERICAN TOWER CORP COM Put 39,500 -62.31 7,678 -62.92 n/a n/a n/a
2024-05-15 2024-03-31 13F AMERICAN TOWER CORP COM Put 104,800 -25.46 20,707 -31.78 n/a n/a n/a
2024-02-14 2023-12-31 13F AMERICAN TOWER CORP COM Put 140,600 -2.29 30,353 28.26 n/a n/a n/a
2023-11-14 2023-09-30 13F AMERICAN TOWER CORP COM Put 143,900 -6.44 23,664 -20.66 n/a n/a n/a
2023-08-14 2023-06-30 13F AMERICAN TOWER CORP COM Put 153,800 2.53 29,828 -2.69 n/a n/a n/a
2023-05-15 2023-03-31 13F AMERICAN TOWER CORP COM Put 150,000 29.31 30,651 24.72 n/a n/a n/a
2023-02-13 2022-12-31 13F AMERICAN TOWER CORP COM Put 116,000 24,576 n/a n/a n/a
2022-08-12 2022-06-30 13F AMERICAN TOWER CORP COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2022-05-12 2022-03-31 13F AMERICAN TOWER CORP COM Put 28,300 -59.80 7,110 -65.48 n/a n/a n/a
2022-02-10 2021-12-31 13F AMERICAN TOWER CORP COM Put 70,400 -6.88 20,592 2.63 n/a n/a n/a
2021-11-12 2021-09-30 13F AMERICAN TOWER CORP COM Put 75,600 20,065 n/a n/a n/a
2021-08-12 2021-06-30 13F AMERICAN TOWER CORP COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2021-05-14 2021-03-31 13F AMERICAN TOWER CORP COM Put 34,200 -3.66 8,176 2.60 n/a n/a n/a
2021-02-12 2020-12-31 13F AMERICAN TOWER CORP COM Put 35,500 3.80 7,968 -2.53 n/a n/a n/a
2020-11-13 2020-09-30 13F AMERICAN TOWER CORP COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2020-08-13 2020-06-30 13F AMERICAN TOWER CORP COM Put 20,400 -33.77 5,274 -21.37 n/a n/a n/a
2020-05-13 2020-03-31 13F American Tower COM Put 30,800 -81.31 6,707 -82.29 n/a n/a n/a
2020-02-13 2019-12-31 13F American Tower COM Put 164,800 -19.29 37,874 -16.12 n/a n/a n/a
2019-11-13 2019-09-30 13F American Tower COM Put 204,200 12.20 45,155 21.35 n/a n/a n/a
2019-08-12 2019-06-30 13F American Tower COM Put 182,000 235.79 37,210 248.38 n/a n/a n/a
2019-05-13 2019-03-31 13F/A American Tower COM Put 54,200 2,068.00 10,681 2,604.05 n/a n/a n/a
2019-05-13 2019-03-31 13F American Tower COM Put 2,500 395 n/a n/a n/a
2019-02-13 2018-12-31 13F American Tower COM Put 2,500 -95.39 395 -96.30 n/a n/a n/a
2018-08-14 2018-06-30 13F American Tower COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2018-05-15 2018-03-31 13F American Tower COM Put 3,400 -80.00 494 -79.63 n/a n/a n/a
2018-02-09 2017-12-31 13F American Tower COM Put 17,000 -0.58 2,425 3.77 n/a n/a n/a
2017-11-13 2017-09-30 13F American Tower COM Put 17,100 67.65 2,337 73.11 n/a n/a n/a
2017-08-10 2017-06-30 13F American Tower COM Put 10,200 209.09 1,350 236.66 n/a n/a n/a
2017-05-03 2017-03-31 13F American Tower COM Put 3,300 -67.65 401 -70.30 n/a n/a n/a
2017-02-08 2016-12-31 13F American Tower COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2016-10-31 2016-09-30 13F American Tower COM Put 10,100 80.36 1,145 80.03 n/a n/a n/a
2016-07-27 2016-06-30 13F American Tower COM Put 5,600 3.70 636 15.01 n/a n/a n/a
2016-05-02 2016-03-31 13F American Tower COM Put 5,400 -3.57 553 -13.05 n/a n/a n/a
2016-01-28 2015-12-31 13F American Tower COM Put 0 0 n/a n/a n/a
2015-10-27 2015-09-30 13F American Tower COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2015-07-28 2015-06-30 13F American Tower COM Put 3,900 364 n/a n/a n/a
2015-01-28 2014-12-31 13F American Tower COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2014-10-31 2014-09-30 13F American Tower COM Put 11,800 -28.92 1,105 -18.69 n/a n/a n/a
2014-05-14 2014-03-31 13F American Tower COM Put 16,600 -55.61 1,359 -54.47 n/a n/a n/a
2014-01-31 2013-12-31 13F American Tower COM Put 37,400 329.89 2,985 362.79 n/a n/a n/a
2013-10-31 2013-09-30 13F American Tower COM Put 8,700 645 n/a n/a n/a
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.