American Tower Corp (AMT) insider trading
Recent insider transactions reported to the SEC on Form 4 — directors and officers buying or selling their own company’s stock. Sourced directly from public SEC filings, latest filed Oct 5, 2026.
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- Filings shown
- 11
- Open-market buys
- 1
- Open-market sells
- 5
Counts cover the 11 most recent Form 4 filings Tradune holds for AMT (filed Mar 12 – Oct 5, 2026); the score below covers only the trailing 90 days (1 buy, 3 sells). No completed check of AMT's Form 4 list on SEC EDGAR is on record yet; the latest AMT filing Tradune holds was filed Oct 5, 2026. This is not guaranteed to be the complete record — see AMT's full Form 4 filing history on SEC EDGAR.
Open-market activity, last 90 days
Purchases (Form 4 code P) and sales (code S) on the 4 filings Tradune holds for AMT filed Jul 30 – Oct 5, 2026. Grants, exercises, tax withholding and the other Form 4 transaction codes are left out.
3 open-market sales by Rule 10b5-1 checkbox
- On filings with the 10b5-1 box checked
- 0 sales· 0 sh
- checkbox disclosed
- On filings with the box not checked
- 0 sales· 0 sh
- not proof that no plan exists
- Not comparable
- 3 sales· 6,791 sh
- filed before Apr 1, 2023, or no checkbox value in the filing data
Counts are Form 4 lines as filed. The checkbox is one per filing, so every sale on a filing with the box checked is counted there even if only some of its transactions were under a plan; it records what the filer disclosed, and the three categories are not a judgement about why a sale was made.
| Insider | Buys | Sells | Shares bought | Shares sold | Value |
|---|---|---|---|---|---|
| Ruth T. DowlingEVP, Chief Admin Ofr, GC & Sec | 0 | 2 | — | 1,791 | −$309,641 |
| Robert Joseph MeyerSVP & Advisor to the CFO | 0 | 1 | — | 5,000 | −$894,450 |
| Rajesh KalathurDirector | 1 | 0 | 2,829 | — | +$500,733 |
Value = shares × the price reported on each Form 4 (+ purchases, − sales); every open-market line in this window disclosed a price.
Summarises ~90 days of public SEC Form 4 activity — more distinct buyers, officer involvement and net buying score higher. A description of filing activity, not a rating or buy signal. How this score is computed →
How to read this: an open-market purchase (Form 4 code P) is a buy at the market price with the insider’s own money, as opposed to a grant, award or option exercise; an open-market sale is code S. When two or more distinct insiders report open-market purchases in the same 90-day window, this site labels that a cluster — a definition, not a forecast; see insider cluster buying. “Held after” is Form 4 Table I column 5; “Change” = shares ÷ holdings before the trade (held after − shares for an acquisition, held after + shares for a disposition).
Insider Buying at AMT
Insiders reported 1 open-market purchase of AMT between Mar 12, 2026 and Oct 5, 2026, across 1 distinct buyer. The most recent purchase was reported by Rajesh Kalathur (Director) on Aug 21, 2026. Grants, option exercises, and tax-withholding transactions are excluded from these counts.
Recent Form 4 filings
Source: SEC EDGAR Form 4 · transaction codes explained
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award | 16,299 | — | 16,299 | — | Oct 1, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market purchase | 2,829 | $177.00 | — | — | Aug 21, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale | 5,000 | $178.89 | — | — | Jul 29, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale | 1,106 | $174.96 | — | — | Jul 29, 2026 |
| Open-market sale | 685 | $169.54 | — | — | Jul 28, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Tax withholding | 153 | $187.53 | — | — | Jun 1, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Gift | 810 | — | — | — | May 28, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale | 416 | $177.54 | — | — | Apr 29, 2026 |
| Open-market sale | 556 | $178.48 | — | — | Apr 28, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Tax withholding | 684 | $182.85 | — | — | Mar 11, 2026 |
| Tax withholding | 1,544 | $186.12 | — | — | Mar 10, 2026 |
| Grant / award | 6,448 | — | — | — | Mar 10, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Tax withholding | 928 | $182.85 | — | — | Mar 11, 2026 |
| Grant / award | 8,060 | — | — | — | Mar 10, 2026 |
| Tax withholding | 1,834 | $186.12 | — | — | Mar 10, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Tax withholding | 1,295 | $182.85 | — | — | Mar 11, 2026 |
| Grant / award | 10,531 | — | — | — | Mar 10, 2026 |
| Tax withholding | 12,433 | $186.12 | — | — | Mar 10, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Tax withholding | 684 | $182.85 | — | — | Mar 11, 2026 |
| Tax withholding | 1,368 | $186.12 | — | — | Mar 10, 2026 |
| Grant / award | 4,030 | — | — | — | Mar 10, 2026 |
Insider filings reported around the same time
Other companies whose most recent Form 4 was filed closest to AMT's (Oct 5, 2026).
Frequently asked about AMT insider activity
How many insiders bought AMT stock in these Form 4 filings?
1 distinct insider at American Tower Corp reported 1 open-market purchase (Form 4 code P) of AMT shares between Mar 12, 2026 and Oct 5, 2026, the most recent filed by Rajesh Kalathur (Director) on Aug 21, 2026. Grants, option exercises, and tax-withholding transactions are excluded from these counts.
Who filed the most recent Form 4 for AMT?
The most recent Form 4 on this page was filed by Paul Blanchett (SVP & Chief Accounting Officer) on Oct 5, 2026, reporting 1 transaction. The original document is linked from the filing list above on SEC EDGAR. Amended filings (Form 4/A) may later revise reported figures.
What was the largest open-market AMT insider sale shown?
The largest open-market sale among the filings shown was 5,000 AMT shares at $178.89 (about $894,450) by Robert Joseph Meyer (SVP & Advisor to the CFO) on Jul 29, 2026. Value is shares × the price reported on the Form 4; trades may be made under a prearranged Rule 10b5-1 plan.
New to Form 4s? The transaction codes, the 90-day window and the 0–100 score are defined on the insider-activity score methodology page.
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Track AMT insider filings free →This score summarizes SEC Form 4 filing activity over the trailing 90 days. It is descriptive, not predictive — not a rating, recommendation, or investment advice. Data: SEC EDGAR (public domain), as filed; amendments may revise figures. Tradune is not a registered investment adviser.
Data as filed; amended filings (Form 4/A) may revise figures. Sales may occur under prearranged Rule 10b5-1 trading plans.