Reported relationships
Latest disclosed role at each company.
No relationships currently tracked through insider filings.
Disclosed balances
About these balances
Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.
No balances currently tracked through insider filings.
Past disclosures · reporting ended (1)
No longer tracked through insider filings. These historical balances do not imply present ownership or a zero position.
AMERICAN TOWER CORP /MA/
Report date May 20, 2026 · Filed May 20, 2026
Section 16 reporting ended · disclosed 2026-05-20. Current position is not established by this disclosure.
| Security / award | Ownership account | Disclosed shares / units | Disclosure context |
|---|---|---|---|
| Common StockSEC Table I · non-derivative | Direct | 9,597 |
Reported balance
Holding disclosure · report date 2026-05-20 · row 1
Holding and transaction disclosures are not merged.
1 source rowRow 1 · Balance 9,597 |
Transaction history
JSON APIPurchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”
The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.
| Transaction date | Company | Activity / security | Shares / units | Reported price | Reported value | Details |
|---|---|---|---|---|---|---|
| March 10, 2026 Filed Mar 12, 2026 20:34 UTC | AMERICAN TOWER CORP /MA/ AMT · Entity 2944 | GrantCommon Stock | 1,209 | $0.00 | $0.00 |
DisclosureSEC source: 0001053507-26-000062 · wk-form4_1773347642.xml · nonDerivative · entry 1 HORMATS ROBERT D · CIK 0001029613 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 9,597 F1 · shares: These restricted stock units ("RSUs") were granted pursuant to the 2007 Equity Incentive Plan, as amended, and vest on March 10, 2027. Each RSU represents a contingent right to receive one share of Common Stock. Read SEC document |
| March 10, 2025 Filed Mar 12, 2025 20:37 UTC | AMERICAN TOWER CORP /MA/ AMT · Entity 2944 | GrantCommon Stock | 1,056 | $0.00 | $0.00 |
DisclosureSEC source: 0001053507-25-000052 · wk-form4_1741811869.xml · nonDerivative · entry 1 HORMATS ROBERT D · CIK 0001029613 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 8,388 F1 · shares: These restricted stock units ("RSUs") were granted pursuant to the 2007 Equity Incentive Plan, as amended, and vest on March 10, 2026. Each RSU represents a contingent right to receive one share of Common Stock. Read SEC document |
| May 03, 2024 Filed May 7, 2024 20:10 UTC | AMERICAN TOWER CORP /MA/ AMT · Entity 2944 | SaleCommon Stock | 700 | $183.50 | $128,450.00 |
DisclosureSEC source: 0001053507-24-000089 · wk-form4_1715112575.xml · nonDerivative · entry 1 HORMATS ROBERT D · CIK 0001029613 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 7,332 Read SEC document |
| March 11, 2024 Filed Mar 12, 2024 20:22 UTC | AMERICAN TOWER CORP /MA/ AMT · Entity 2944 | GrantCommon Stock | 1,089 | $0.00 | $0.00 |
DisclosureSEC source: 0001053507-24-000058 · wk-form4_1710274941.xml · nonDerivative · entry 1 HORMATS ROBERT D · CIK 0001029613 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 8,032 F1 · shares: These restricted stock units ("RSUs") were granted pursuant to the 2007 Equity Incentive Plan, as amended, and vest on March 11, 2025. Each RSU represents a contingent right to receive one share of Common Stock. Read SEC document |
| October 16, 2023 Filed Oct 18, 2023 20:10 UTC | AMERICAN TOWER CORP /MA/ AMT · Entity 2944 | SaleCommon Stock | 150 | $166.39 | $24,958.50 |
DisclosureSEC source: 0001053507-23-000156 · wk-form4_1697659825.xml · nonDerivative · entry 1 HORMATS ROBERT D · CIK 0001029613 · Director 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 6,943 F1 · kind: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on April 27, 2023. Read SEC document |
| October 02, 2023 Filed Oct 4, 2023 20:10 UTC | AMERICAN TOWER CORP /MA/ AMT · Entity 2944 | SaleCommon Stock | 150 | $163.63 | $24,544.50 |
DisclosureSEC source: 0001053507-23-000155 · wk-form4_1696450194.xml · nonDerivative · entry 1 HORMATS ROBERT D · CIK 0001029613 · Director 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 7,093 F1 · kind: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on April 27, 2023. Read SEC document |
| August 15, 2023 Filed Aug 17, 2023 20:25 UTC | AMERICAN TOWER CORP /MA/ AMT · Entity 2944 | SaleCommon Stock | 125 | $185.34 | $23,167.50 |
DisclosureSEC source: 0001053507-23-000149 · wk-form4_1692303919.xml · nonDerivative · entry 1 HORMATS ROBERT D · CIK 0001029613 · Director 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 7,243 F1 · kind: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on April 27, 2023. Read SEC document |
| August 01, 2023 Filed Aug 3, 2023 20:07 UTC | AMERICAN TOWER CORP /MA/ AMT · Entity 2944 | SaleCommon Stock | 125 | $190.75 | $23,843.75 |
DisclosureSEC source: 0001053507-23-000144 · wk-form4_1691093224.xml · nonDerivative · entry 1 HORMATS ROBERT D · CIK 0001029613 · Director 10b5-1 filing: Plan reported Ownership: Direct Disclosed balance after: 7,368 F1 · kind: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on April 27, 2023. Read SEC document |
| March 10, 2023 Filed Mar 14, 2023 20:29 UTC | AMERICAN TOWER CORP /MA/ AMT · Entity 2944 | GrantCommon Stock | 1,072 | $0.00 | $0.00 |
DisclosureSEC source: 0001053507-23-000084 · wf-form4_167882573266071.xml · nonDerivative · entry 1 HORMATS ROBERT D · CIK 0001029613 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 7,493 F1 · shares: These restricted stock units ("RSUs") were granted pursuant to the 2007 Equity Incentive Plan, as amended, and vest on March 10, 2024. Each RSU represents a contingent right to receive one share of Common Stock. Read SEC document |
| September 01, 2022 Filed Sep 6, 2022 20:25 UTC | AMERICAN TOWER CORP /MA/ AMT · Entity 2944 | SaleCommon Stock | 150 | $252.94 | $37,941.00 |
DisclosureSEC source: 0001053507-22-000107 · wf-form4_166249587900903.xml · nonDerivative · entry 1 HORMATS ROBERT D · CIK 0001029613 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 6,421 F1 · kind: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on April 28, 2022. Read SEC document |
| July 01, 2022 Filed Jul 6, 2022 20:03 UTC | AMERICAN TOWER CORP /MA/ AMT · Entity 2944 | SaleCommon Stock | 150 | $254.53 | $38,179.50 |
DisclosureSEC source: 0001053507-22-000087 · wf-form4_165713781162672.xml · nonDerivative · entry 1 HORMATS ROBERT D · CIK 0001029613 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 6,571 F1 · kind: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on April 28, 2022. Read SEC document |
| June 15, 2022 Filed Jun 17, 2022 21:50 UTC | AMERICAN TOWER CORP /MA/ AMT · Entity 2944 | SaleCommon Stock | 200 | $235.40 | $47,080.00 |
DisclosureSEC source: 0001053507-22-000085 · wf-form4_165550258566544.xml · nonDerivative · entry 1 HORMATS ROBERT D · CIK 0001029613 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 6,721 F1 · kind: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on April 28, 2022. Read SEC document |
| June 01, 2022 Filed Jun 3, 2022 20:08 UTC | AMERICAN TOWER CORP /MA/ AMT · Entity 2944 | SaleCommon Stock | 200 | $256.13 | $51,226.00 |
DisclosureSEC source: 0001053507-22-000084 · wf-form4_165428690279015.xml · nonDerivative · entry 1 HORMATS ROBERT D · CIK 0001029613 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 6,921 F1 · kind: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on April 28, 2022. Read SEC document |
| March 10, 2022 Filed Mar 14, 2022 21:29 UTC | AMERICAN TOWER CORP /MA/ AMT · Entity 2944 | GrantCommon Stock | 881 | $0.00 | $0.00 |
DisclosureSEC source: 0001053507-22-000037 · wf-form4_164729323960973.xml · nonDerivative · entry 1 HORMATS ROBERT D · CIK 0001029613 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 7,121 F1 · shares: These restricted stock units ("RSUs") were granted pursuant to the 2007 Equity Incentive Plan, as amended, and vest on March 10, 2023. Each RSU represents a contingent right to receive one share of Common Stock. Read SEC document |
| September 07, 2021 Filed Sep 9, 2021 20:17 UTC | AMERICAN TOWER CORP /MA/ AMT · Entity 2944 | SaleCommon Stock | 100 | $300.50 | $30,050.00 |
DisclosureSEC source: 0001053507-21-000138 · wf-form4_163121861412169.xml · nonDerivative · entry 1 HORMATS ROBERT D · CIK 0001029613 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 6,240 F1 · kind: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 6, 2021. Read SEC document |
| August 24, 2021 Filed Aug 26, 2021 20:19 UTC | AMERICAN TOWER CORP /MA/ AMT · Entity 2944 | SaleCommon Stock | 100 | $289.49 | $28,949.00 |
DisclosureSEC source: 0001053507-21-000135 · wf-form4_163000912496622.xml · nonDerivative · entry 1 HORMATS ROBERT D · CIK 0001029613 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 6,340 F1 · kind: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 6, 2021. Read SEC document |
| August 10, 2021 Filed Aug 12, 2021 20:20 UTC | AMERICAN TOWER CORP /MA/ AMT · Entity 2944 | SaleCommon Stock | 100 | $281.55 | $28,155.00 |
DisclosureSEC source: 0001053507-21-000131 · wf-form4_162879959606032.xml · nonDerivative · entry 1 HORMATS ROBERT D · CIK 0001029613 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 6,440 F1 · kind: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 6, 2021. Read SEC document |
| July 20, 2021 Filed Jul 22, 2021 20:13 UTC | AMERICAN TOWER CORP /MA/ AMT · Entity 2944 | SaleCommon Stock | 100 | $283.11 | $28,311.00 |
DisclosureSEC source: 0001053507-21-000120 · wf-form4_162698472659963.xml · nonDerivative · entry 1 HORMATS ROBERT D · CIK 0001029613 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 6,540 F1 · kind: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 6, 2021. Read SEC document |
| July 06, 2021 Filed Jul 8, 2021 20:22 UTC | AMERICAN TOWER CORP /MA/ AMT · Entity 2944 | SaleCommon Stock | 100 | $272.87 | $27,287.00 |
DisclosureSEC source: 0001053507-21-000118 · wf-form4_162577571386207.xml · nonDerivative · entry 1 HORMATS ROBERT D · CIK 0001029613 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 6,640 F1 · kind: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 6, 2021. Read SEC document |
| March 10, 2021 Filed Mar 12, 2021 21:05 UTC | AMERICAN TOWER CORP /MA/ AMT · Entity 2944 | GrantCommon Stock | 881 | $0.00 | $0.00 |
DisclosureSEC source: 0001053507-21-000039 · edgar.xml · nonDerivative · entry 1 HORMATS ROBERT D · CIK 0001029613 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 6,740 F1 · shares: These restricted stock units ("RSUs") were granted pursuant to the 2007 Equity Incentive Plan, as amended, and vest on March 10, 2022. Each RSU represents a contingent right to receive one share of Common Stock. Read SEC document |
| December 28, 2020 Filed Dec 30, 2020 21:08 UTC | AMERICAN TOWER CORP /MA/ AMT · Entity 2944 | SaleCommon Stock | 100 | $218.87 | $21,887.00 |
DisclosureSEC source: 0001053507-20-000180 · edgar.xml · nonDerivative · entry 1 HORMATS ROBERT D · CIK 0001029613 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 5,859 F1 · kind: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on July 31, 2020. Read SEC document |
| December 21, 2020 Filed Dec 23, 2020 21:12 UTC | AMERICAN TOWER CORP /MA/ AMT · Entity 2944 | SaleCommon Stock | 100 | $218.36 | $21,836.00 |
DisclosureSEC source: 0001053507-20-000179 · edgar.xml · nonDerivative · entry 1 HORMATS ROBERT D · CIK 0001029613 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 5,959 F1 · kind: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on July 31, 2020. Read SEC document |
| September 28, 2020 Filed Sep 30, 2020 20:36 UTC | AMERICAN TOWER CORP /MA/ AMT · Entity 2944 | SaleCommon Stock | 100 | $243.07 | $24,307.00 |
DisclosureSEC source: 0001053507-20-000151 · edgar.xml · nonDerivative · entry 1 HORMATS ROBERT D · CIK 0001029613 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 6,059 F1 · kind: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on July 31, 2020. Read SEC document |
| September 21, 2020 Filed Sep 23, 2020 22:14 UTC | AMERICAN TOWER CORP /MA/ AMT · Entity 2944 | SaleCommon Stock | 100 | $243.38 | $24,338.00 |
DisclosureSEC source: 0001053507-20-000147 · edgar.xml · nonDerivative · entry 1 HORMATS ROBERT D · CIK 0001029613 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 6,159 F1 · kind: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on July 31, 2020. Read SEC document |
| March 10, 2020 Filed Mar 12, 2020 20:21 UTC | AMERICAN TOWER CORP /MA/ AMT · Entity 2944 | GrantCommon Stock | 739 | $0.00 | $0.00 |
DisclosureSEC source: 0001053507-20-000040 · edgar.xml · nonDerivative · entry 1 HORMATS ROBERT D · CIK 0001029613 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 6,259 F1 · shares: These restricted stock units ("RSUs") were granted pursuant to the 2007 Equity Incentive Plan, as amended, and vest on March 10, 2021. Each RSU represents a contingent right to receive one share of Common Stock. Read SEC document |
| November 15, 2019 Filed Nov 19, 2019 21:49 UTC | AMERICAN TOWER CORP /MA/ AMT · Entity 2944 | SaleCommon Stock | 50 | $212.21 | $10,610.50 |
DisclosureSEC source: 0001053507-19-000138 · edgar.xml · nonDerivative · entry 1 HORMATS ROBERT D · CIK 0001029613 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 5,520 F1 · kind: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 1, 2019. Read SEC document |
| October 15, 2019 Filed Oct 17, 2019 20:38 UTC | AMERICAN TOWER CORP /MA/ AMT · Entity 2944 | SaleCommon Stock | 100 | $225.74 | $22,574.00 |
DisclosureSEC source: 0001053507-19-000128 · edgar.xml · nonDerivative · entry 1 HORMATS ROBERT D · CIK 0001029613 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 5,570 F1 · kind: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 1, 2019. Read SEC document |
| August 15, 2019 Filed Aug 19, 2019 20:17 UTC | AMERICAN TOWER CORP /MA/ AMT · Entity 2944 | SaleCommon Stock | 100 | $219.25 | $21,925.00 |
DisclosureSEC source: 0001053507-19-000110 · edgar.xml · nonDerivative · entry 1 HORMATS ROBERT D · CIK 0001029613 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 5,670 F1 · kind: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 1, 2019. Read SEC document |
| July 15, 2019 Filed Jul 17, 2019 20:19 UTC | AMERICAN TOWER CORP /MA/ AMT · Entity 2944 | SaleCommon Stock | 100 | $210.33 | $21,033.00 |
DisclosureSEC source: 0001053507-19-000094 · edgar.xml · nonDerivative · entry 1 HORMATS ROBERT D · CIK 0001029613 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 5,770 F1 · kind: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 1, 2019. Read SEC document |
| May 15, 2019 Filed May 17, 2019 20:25 UTC | AMERICAN TOWER CORP /MA/ AMT · Entity 2944 | SaleCommon Stock | 100 | $198.20 | $19,820.00 |
DisclosureSEC source: 0001338678-19-000009 · edgar.xml · nonDerivative · entry 1 HORMATS ROBERT D · CIK 0001029613 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 5,870 F1 · kind: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 1, 2019. Read SEC document |
| April 15, 2019 Filed Apr 17, 2019 20:25 UTC | AMERICAN TOWER CORP /MA/ AMT · Entity 2944 | SaleCommon Stock | 100 | $196.70 | $19,670.00 |
DisclosureSEC source: 0001053507-19-000065 · edgar.xml · nonDerivative · entry 1 HORMATS ROBERT D · CIK 0001029613 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 5,970 F1 · kind: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 1, 2019. Read SEC document |
| March 11, 2019 Filed Mar 12, 2019 21:35 UTC | AMERICAN TOWER CORP /MA/ AMT · Entity 2944 | GrantCommon Stock | 973 | $0.00 | $0.00 |
DisclosureSEC source: 0001053507-19-000033 · edgar.xml · nonDerivative · entry 1 HORMATS ROBERT D · CIK 0001029613 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 6,070 F1 · shares: These restricted stock units ("RSUs") were granted pursuant to the 2007 Equity Incentive Plan, as amended, and vest on March 11, 2020. Each RSU represents a contingent right to receive one share of Common Stock. Read SEC document |
| March 12, 2018 Filed Mar 13, 2018 20:27 UTC | AMERICAN TOWER CORP /MA/ AMT · Entity 2944 | GrantCommon Stock | 1,241 | $0.00 | $0.00 |
DisclosureSEC source: 0001338678-18-000010 · edgar.xml · nonDerivative · entry 1 HORMATS ROBERT D · CIK 0001029613 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 5,097 F1 · shares: These restricted stock units ("RSUs") were granted pursuant to the 2007 Equity Incentive Plan, as amended, and vest on March 12, 2019. Each RSU represents a contingent right to receive one share of Common Stock. Read SEC document |
| March 10, 2017 Filed Mar 14, 2017 20:59 UTC | AMERICAN TOWER CORP /MA/ AMT · Entity 2944 | GrantCommon Stock | 1,321 | $0.00 | $0.00 |
DisclosureSEC source: 0001338678-17-000013 · edgar.xml · nonDerivative · entry 1 HORMATS ROBERT D · CIK 0001029613 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 3,856 F1 · shares: These Restricted Stock Units (RSUs) were granted pursuant to the 2007 Equity Incentive Plan and vest on March 10, 2018. Each RSU represents a contingent right to receive one share of Common Stock. Read SEC document |
Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.