American Tower Corporation
US ˙ NYSE ˙ US03027X1000

SecurityAMT / American Tower Corporation
InstitutionWalleye Capital LLC
Latest Disclosed Ownership16,684 shares
Latest Disclosed Value $ 2,879,325
Walleye Capital LLC ownership in AMT / American Tower Corporation

On May 13, 2026 - Walleye Capital LLC filed a 13F-HR/A form disclosing ownership of 16,684 shares of American Tower Corporation (US:AMT) valued at $2,879,325 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 1,251 shares of American Tower Corporation. This represents a change in shares of 1,233.65% during the quarter. The current value of the position is $3,238,698 USD.

Walleye Capital LLC 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 2,500 of underlying shares valued at $431,450 USD and put options representing 15,700 of underlying shares valued at $2,709,506 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.

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)
2026-05-13 2026-03-31 13F/A-1 AMERICAN TOWER COM 03027X100 16,684 15,433 1,233.65 2,879 1,214.61 0.0120
2026-05-08 2026-03-31 13F AMERICAN TOWER COM 03027X100 16,684 15,433 2,879 0.0120
2026-02-13 2025-12-31 13F AMERICAN TOWER CORP COM 03027X100 1,251 -32,398 -96.28 220 -96.62 0.0007
2025-11-14 2025-09-30 13F AMERICAN TOWER CORP COM 03027X100 33,649 -27,896 -45.33 6,471 -52.43 0.0243
2025-08-13 2025-06-30 13F AMERICAN TOWER CORP COM 03027X100 61,545 -22,101 -26.42 13,603 -25.27 0.0528
2025-05-14 2025-03-31 13F AMERICAN TOWER CORP COM 03027X100 83,646 -11,186 -11.80 18,201 4.65 0.0821
2025-02-13 2024-12-31 13F AMERICAN TOWER CORP COM 03027X100 94,832 18,679 24.53 17,393 -1.79 0.0425
2024-11-14 2024-09-30 13F AMERICAN TOWER CORP COM 03027X100 76,153 15,789 26.16 17,710 50.94 0.0369
2024-08-14 2024-06-30 13F AMERICAN TOWER CORP COM 03027X100 60,364 52,496 667.21 11,734 655.02 0.0209
2024-05-15 2024-03-31 13F AMERICAN TOWER CORP COM 03027X100 7,868 -17,402 -68.86 1,555 -71.51 0.0028
2024-02-14 2023-12-31 13F AMERICAN TOWER CORP COM 03027X100 25,270 -56,228 -68.99 5,455 -59.30 0.0116
2023-11-21 2023-09-30 13F/A-1 AMERICAN TOWER CORP COM 03027X100 81,498 -32,502 -28.51 13,402 -39.38 0.0343
2023-11-14 2023-09-30 13F AMERICAN TOWER CORP COM 03027X100 81,498 -32,502 13,402 0.0345
2023-08-14 2023-06-30 13F AMERICAN TOWER CORP COM 03027X100 114,000 79,374 229.23 22,109 212.49 0.0801
2023-05-15 2023-03-31 13F AMERICAN TOWER CORP COM 03027X100 34,626 26,247 313.25 7,075 298.59 0.1060
2023-02-14 2022-12-31 13F AMERICAN TOWER CORP COM 03027X100 8,379 8,379 1,775 0.0324
2021-02-16 2020-12-31 13F AMERICAN TOWER CORP COM 03027X100 0 -5,449 -100.00 0 -100.00
2020-11-16 2020-09-30 13F AMERICAN TOWER CORP COM 03027X100 5,449 -14,745 -73.02 1,317 -74.77 0.1468
2020-08-14 2020-06-30 13F AMERICAN TOWER CORP COM 03027X100 20,194 20,194 5,221 1.1649
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
(%)
2026-05-13 2026-03-31 13F/A AMERICAN TOWER COM Call 2,500 31.58 431 29.43 n/a n/a n/a
2026-05-08 2026-03-31 13F AMERICAN TOWER COM Call 2,500 431 n/a n/a n/a
2026-02-13 2025-12-31 13F AMERICAN TOWER CORP COM Call 1,900 0.00 334 -8.77 n/a n/a n/a
2025-11-14 2025-09-30 13F AMERICAN TOWER CORP COM Call 1,900 -53.66 365 -59.71 n/a n/a n/a
2025-08-13 2025-06-30 13F AMERICAN TOWER CORP COM Call 4,100 115.79 906 119.37 n/a n/a n/a
2025-05-14 2025-03-31 13F AMERICAN TOWER CORP COM Call 1,900 -91.88 413 -90.38 n/a n/a n/a
2025-02-13 2024-12-31 13F AMERICAN TOWER CORP COM Call 23,400 -7.14 4,292 -26.77 n/a n/a n/a
2024-11-14 2024-09-30 13F AMERICAN TOWER CORP COM Call 25,200 -12.80 5,861 4.33 n/a n/a n/a
2024-08-14 2024-06-30 13F AMERICAN TOWER CORP COM Call 28,900 -79.34 5,618 -79.68 n/a n/a n/a
2024-05-15 2024-03-31 13F AMERICAN TOWER CORP COM Call 139,900 42.03 27,643 29.99 n/a n/a n/a
2024-02-14 2023-12-31 13F AMERICAN TOWER CORP COM Call 98,500 119.87 21,264 188.64 n/a n/a n/a
2023-11-21 2023-09-30 13F/A AMERICAN TOWER CORP COM Call 44,800 97.36 7,367 67.36 n/a n/a n/a
2023-11-14 2023-09-30 13F AMERICAN TOWER CORP COM Call 44,800 7,367 n/a n/a n/a
2023-08-14 2023-06-30 13F AMERICAN TOWER CORP COM Call 22,700 4,402 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
(%)
2026-05-13 2026-03-31 13F/A AMERICAN TOWER COM Put 15,700 2,142.86 2,710 2,120.49 n/a n/a n/a
2026-05-08 2026-03-31 13F AMERICAN TOWER COM Put 15,700 2,710 n/a n/a n/a
2026-02-13 2025-12-31 13F AMERICAN TOWER CORP COM Put 700 0.00 123 -8.96 n/a n/a n/a
2025-11-14 2025-09-30 13F AMERICAN TOWER CORP COM Put 700 -89.39 135 -90.81 n/a n/a n/a
2025-08-13 2025-06-30 13F AMERICAN TOWER CORP COM Put 6,600 842.86 1,459 859.21 n/a n/a n/a
2025-05-14 2025-03-31 13F AMERICAN TOWER CORP COM Put 700 -89.71 152 -87.81 n/a n/a n/a
2025-02-13 2024-12-31 13F AMERICAN TOWER CORP COM Put 6,800 23.64 1,247 -2.50 n/a n/a n/a
2024-11-14 2024-09-30 13F AMERICAN TOWER CORP COM Put 5,500 -21.43 1,279 -5.96 n/a n/a n/a
2024-08-14 2024-06-30 13F AMERICAN TOWER CORP COM Put 7,000 -94.79 1,361 -94.88 n/a n/a n/a
2024-05-15 2024-03-31 13F AMERICAN TOWER CORP COM Put 134,400 49.67 26,556 36.99 n/a n/a n/a
2024-02-14 2023-12-31 13F AMERICAN TOWER CORP COM Put 89,800 141.40 19,386 216.92 n/a n/a n/a
2023-11-21 2023-09-30 13F/A AMERICAN TOWER CORP COM Put 37,200 520.00 6,118 425.97 n/a n/a n/a
2023-11-14 2023-09-30 13F AMERICAN TOWER CORP COM Put 37,200 6,118 n/a n/a n/a
2023-08-14 2023-06-30 13F AMERICAN TOWER CORP COM Put 6,000 1,164 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.