Question 1

Who are the insiders buying AMERICAN TOWER CORP /MA/ stock?

Accepted Answer

InsiderAct tracks all open-market purchases of AMERICAN TOWER CORP /MA/ stock by corporate insiders — including officers, directors, and shareholders owning more than 10% — sourced from public SEC Form 4 filings.

Question 2

What does insider buying at a company mean?

Accepted Answer

When a corporate officer, director, or major shareholder purchases their own company's stock on the open market using personal funds, it signals confidence in the company's outlook. This is especially meaningful when multiple insiders buy within the same 7–14 day window (cluster buying) or when the purchase size exceeds $100,000.

Question 3

How do I find cluster buying signals for a company?

Accepted Answer

InsiderAct automatically detects cluster buying — two or more insiders independently purchasing shares within a 14-day window. When a cluster buy signal is active for a company, it appears prominently on the company's InsiderAct page and on the Signals tab.

Question 4

Has AMERICAN TOWER CORP /MA/ had any recent large insider purchases?

Accepted Answer

InsiderAct tracks all open-market purchases of $100,000 or more at AMERICAN TOWER CORP /MA/. Large insider purchases are flagged as high-conviction signals because they represent meaningful personal capital commitments by executives or directors who have direct visibility into the company's operations and prospects.

Question 5

Where do the insider transactions on this page come from?

Accepted Answer

All transactions shown on InsiderAct company pages are sourced directly from SEC EDGAR Form 4 filings — the mandatory public disclosures that corporate insiders must submit within 2 business days of any stock transaction. InsiderAct ingests these filings in near real time and filters for open-market purchases and sales.

								1WStock price change 1 week after insider bought. Small number below shows return vs S&P 500.	1MStock price change 1 month after insider bought.
2026-03-12	2026-03-11	Rossi Richard C	EVP	Tax Payment	684	$182.85	$125,069	N/A	N/A
2026-03-12	2026-03-11	Font Juan	CEO	Tax Payment	928	$182.85	$169,685	N/A	N/A
2026-03-12	2026-03-11	Smith Rodney M	CFO	Tax Payment	1,295	$182.85	$236,791	N/A	N/A
2026-03-12	2026-03-11	Meyer Robert Joseph	CAO	Tax Payment	684	$182.85	$125,069	N/A	N/A
2026-03-12	2026-03-11	Dowling Ruth T	EVP	Tax Payment	863	$182.85	$157,800	N/A	N/A
2026-03-12	2026-03-11	Noel Eugene M	COO	Tax Payment	719	$182.85	$131,469	N/A	N/A
2026-03-12	2026-03-11	Vondran Steven O	CEO	Tax Payment	2,158	$182.85	$394,590	N/A	N/A
2026-03-12	2026-03-10	Macnab Craig	Director	Award	1,209	$0.00	$0	N/A	N/A
2026-03-12	2026-03-10	Hormats Robert D	Director	Award	1,209	$0.00	$0	N/A	N/A
2026-03-12	2026-03-10	Reeve Pamela D A	Director	Award	1,209	$0.00	$0	N/A	N/A

AMT

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