Company · AMT · CIK 1053507

American Tower Corp /Ma/ (AMT) SEC filings and CIK.

AMT’s SEC Central Index Key (CIK) is 0001053507, or 1053507 without leading zeros. The SEC’s ticker file lists it as AMERICAN TOWER CORP /MA/.

Ticker: AMT
CIK: 0001053507
Other tickers: None
Insider transactions, Q3 2026: 4

Insider trading

In Q3 2026, insiders at American Tower Corp /Ma/ reported 4 non-derivative transactions on 4 Forms 3, 4 and 5, including 1 open-market purchases and 3 sales. See every AMT insider transaction →

Recent filings we observed

From our record of EDGAR’s latest-filings feed and sampled daily indexes. Not a complete filing history; use the filings API for that.
Filed	Form	Accession
2026-11-09	424B5	0001193125-26-452770

Get AMT SEC data through the API

Filing history

curl "https://sec-api.dev/api/v1/filings?cik=1053507&limit=10" \
  -H "Authorization: Bearer $SEC_API_KEY"

Company profile

curl "https://sec-api.dev/api/v1/companies/1053507" \
  -H "Authorization: Bearer $SEC_API_KEY"

Reported XBRL facts

curl "https://sec-api.dev/api/v1/facts/1053507?taxonomy=us-gaap&concept=Revenues&limit=10" \
  -H "Authorization: Bearer $SEC_API_KEY"

Ticker to CIK API · SEC filings API · American Tower Corp /Ma/ on SEC.gov

Questions

What is AMT’s CIK number?

AMT’s SEC Central Index Key (CIK) is 0001053507, or 1053507 without leading zeros. The SEC’s ticker file lists it as AMERICAN TOWER CORP /MA/.

How do I find American Tower Corp /Ma/’s 10-K?

Request /api/v1/filings?cik=1053507&form=10-K, or open the company’s EDGAR page and filter by 10-K. Foreign issuers file 20-F or 40-F instead.

Ticker and CIK: SEC company_tickers.json, cached 2026-11-02. Tickers can move between entities; the CIK identifies the filer.

Plain-text version for agents and LLMs: /companies/amt.md

Independent. Not affiliated with, endorsed by, or sponsored by the U.S. Securities and Exchange Commission. Data is reproduced from public SEC filings and datasets. Not investment advice.