Grid › Real Estate Investment Trusts

AMT American Tower Corp

NYSE, CIK 0001053507, fiscal year ends 12/31. Last price 188.97 on 2026-10-23, market value 88.1 billion dollars.

Machine-readable: AMT.json, AMT.md. Sections: Graham Defensive, Magic Formula, Momentum, Insider, Buffett Quality, Lynch GARP, Graham Enterprising, Piotroski F-Score, earnings record, insiders, filings and links.

Philosophy	Score	Status	Current inputs as of	History used	Price	Verification	Rules
Graham Defensive	n/a	not scored (financial)	—	—	—	—	method
Magic Formula	n/a	not scored	—	—	—	—	method
Momentum	48	ok	2026-10-23	—	2026-10-23	—	method
Insider	44	ok	2026-10-23	—	—	—	method
Buffett Quality	n/a	not scored (financial)	—	—	—	—	method
Lynch GARP	n/a	not scored (financial)	—	—	—	—	method
Graham Enterprising	n/a	not scored (financial)	—	—	—	—	method
Piotroski F-Score	n/a	not scored (financial)	—	—	—	—	method

Market value, source trail

market_value = traded_price (price date) / depositary_ratio x latest point-in-time SEC shares outstanding (share-count date shown; from the filing cover page, summed across share classes only where the issuer filing verifies the classes are economically equivalent (rule + evidence URL in the source text), else withheld; priced at the primary listed class, so where other classes trade at a different price the value is an approximation; restated only for issuer-verified splits after the count date); weighted-average share counts are never used

Input	Value	Unit	Period / date	Source
Traded price	188.97	USD per traded unit (share or ADS)	2026-10-23	Yahoo Finance
SEC shares outstanding	465,960,048	underlying shares	2026-07-21	SEC cover page 10-Q 0001053507-26-000133 (465,960,048 shares (single class on cover)); filing document https://www.sec.gov/Archives/edgar/data/1053507/000105350726000133/amt-20260630.htm 0001053507-26-000133
Depositary ratio	1.0	underlying shares per traded unit		domestic 10-K filer; SEC shares are the traded units
Market value price date × latest reported shares	88,052,470,271	USD	2026-10-23 shares at 2026-07-21	188.97 (price 2026-10-23) / 1 x 465,960,048 (shares at 2026-07-21) = 88,052,470,271

Graham Defensive

not scored (financial). How this is scored.

not scored (financial).

Magic Formula

not scored. How this is scored.

not scored.

Momentum

48 of 100. ok. How this is scored.

Test or factor	Value	Points
12-1 month return	-7.6 % (percentile 29.0)	14.5 / 50
6 month return	7.7 % (percentile 59.9)	12.0 / 20
Price / 52-week high	0.993	14.9 / 15
Volatility penalty (60d annualised)	29.9 %	6.4 / 15

Inputs, 1 numbers with their sources

Input	Value	Period	Source	Check
Adjusted close series (14 months)	188.97	2026-10-23	Yahoo Finance / Alpaca Market Data daily history	not cross-checked

Insider

44 of 100. ok. How this is scored. Form 4 data loaded through 2026-10-23

Test or factor	Value	Points
Open-market buy value / market cap (percentile among buyers)	0.06 bp	14.7 / 35
Distinct buyers	2	12.5 / 25
Buyer seniority	0.5	10.0 / 20
Recency (half-life 30d)	0.87	8.7 / 10
Sales penalty (excludes 10b5-1 plan sales)	0.1 bp	-2.2 / 0

Inputs, 5 numbers with their sources

Input	Value	Period	Source	Check
Form 4 P Clarke Teresa Hillary 2026-10-20	7864.0432	2026-10-20	SEC Form 4 (insider transactions data set)	not cross-checked
Form 4 P Kalathur Rajesh 2026-08-21	500733.0	2026-08-21	SEC Form 4 (insider transactions data set)	not cross-checked
Form 4 S Meyer Robert Joseph 2026-07-29	894449.9999999999	2026-07-29	SEC Form 4 (insider transactions data set)	not cross-checked
excluded 2026-07-29 S	10b5-1 plan		rule	not cross-checked
excluded 2026-07-28 S	10b5-1 plan		rule	not cross-checked

Buffett Quality

not scored (financial). How this is scored.

not scored (financial).

Lynch GARP

not scored (financial). How this is scored.

not scored (financial).

Graham Enterprising

not scored (financial). How this is scored.

not scored (financial).

Piotroski F-Score

not scored (financial). How this is scored.

not scored (financial).

Earnings record

SEC XBRL, by fiscal year (named by the calendar year it ends in); EPS split-adjusted to today's shares; each row links to the filing.

FY	Ended	Revenue, $M	Net income, $M	EPS diluted	Dividend	Filing
2013	2013-12-31	3,361	551	1.38	paid	0001053507-16-000018
2014	2014-12-31	4,100	825	2.0	paid	0001053507-17-000009
2015	2015-12-31	4,772	685	1.41	paid	0001053507-18-000006
2016	2016-12-31	5,786	956	1.98	paid	0001053507-19-000012
2017	2017-12-31	6,664	1,239	2.67	paid	0001053507-20-000028
2018	2018-12-31	7,440	1,236	2.77	paid	0001053507-21-000026
2019	2019-12-31	7,580	1,888	4.24	paid	0001053507-21-000026
2020	2020-12-31	8,042	1,691	3.79	paid	0001053507-21-000026
2021	2021-12-31	9,357	2,568	5.66	paid	0001053507-24-000011
2022	2022-12-31	9,645	1,697	3.82	paid	0001053507-25-000025
2023	2023-12-31	10,012	1,367	3.18	paid	0001053507-26-000035
2024	2024-12-31	10,127	2,280	4.82	paid	0001053507-26-000035
2025	2025-12-31	10,645	2,628	5.4	paid	0001053507-26-000035

Insider transactions

SEC Form 4 open-market purchases and sales from the insider data sets; latest 20.

Date	Insider	Role	Type	Shares	Price	Value
2026-10-20	Clarke Teresa Hillary	director	buy	43	183.20	7,864
2026-08-21	Kalathur Rajesh	director	buy	2,829	177.00	500,733
2026-07-29	Dowling Ruth T	officer	sale plan	1,106	174.96	193,506
2026-07-29	Meyer Robert Joseph	CFO	sale	5,000	178.89	894,450
2026-07-28	Dowling Ruth T	officer	sale plan	685	169.54	116,135
2026-07-13	Clarke Teresa Hillary	director	buy	46	167.52	7,781
2026-04-29	Dowling Ruth T	officer	sale	416	177.54	73,857
2026-04-28	Clarke Teresa Hillary	director	buy	44	177.08	7,703
2026-04-28	Dowling Ruth T	officer	sale	556	178.48	99,235
2026-02-02	Clarke Teresa Hillary	director	buy	31	178.04	5,468
2025-10-20	Clarke Teresa Hillary	director	buy	29	189.12	5,420
2025-07-11	Clarke Teresa Hillary	director	buy	24	223.23	5,379
2025-04-28	Clarke Teresa Hillary	director	buy	25	209.33	5,335
2025-02-03	Clarke Teresa Hillary	director	buy	18	187.27	3,292
2024-10-25	Clarke Teresa Hillary	director	buy	14	227.42	3,268
2024-07-12	Clarke Teresa Hillary	director	buy	16	204.28	3,243
2024-04-26	Clarke Teresa Hillary	director	buy	19	172.82	3,212
2024-02-01	Clarke Teresa Hillary	director	buy	8	199.95	1,536
2023-10-27	Clarke Teresa Hillary	director	buy	8	171.52	1,450
2023-07-10	Clarke Teresa Hillary	director	buy	7	193.78	1,394

Filings and links

Third-party sites are linked only; nothing from them is stored here.

SEC: filing index, 8-K, Form 4, XBRL companyfacts
Prices: Yahoo Finance, Stooq
Elsewhere: morningstar, finviz, stockanalysis, seeking alpha, openinsider, google news

Cite as: The Claude Trader snapshot 2026-10-26, https://theclaudetrader.com/s/AMT; data from SEC EDGAR XBRL and market prices (Alpaca Market Data, Yahoo Finance) to 2026-10-23. Data last checked 2026-10-26.