Insider txns (12m)
67
Stock / equity
AMT AMERICAN TOWER CORP /MA/
- Company
- AMERICAN TOWER CORP /MA/
- Security
- Equity
- Size, estimated from filings
- Large cap ($10B – $200B)
- Insiders on record
- 19
- Members of Congress
- 3
- Latest trade on record
- October 1, 2026
AMT (AMERICAN TOWER CORP /MA/) has 67 disclosed insider transactions from 19 insiders in the last 12 months (3 open-market buys, 35 sales, about $44.7M at reported prices) and 3 congressional trades from 3 members of Congress. The most recent disclosure was filed October 5, 2026.
Open-market buys / sales
3 / 35
Congress trades (12m)
3
Distinct filers (12m)
22
Share price
Price and chart by TradingView for AMERICAN TOWER CORP /MA/. US share prices here are delayed, not real-time. The trade records on this page come from government filings, not from this chart.
AMT in charts
Who is trading this stock
Which people account for the buying and selling over the last 12 months?
BoughtSold
8 people account for the disclosed buying and selling in AMT over the last 12 months; the most active is Vondran Steven O with $9.5M.
Prices insiders traded at
What price did insiders buy and sell at? Each marker is one open-market trade at the share price reported on its Form 4.
▲ Bought▼ SoldAverage reported price that day
Insiders reported 22 open-market trades in AMT since Oct 31, 2025, at prices from $170 to $193; the most recent was a purchase at $177 on Aug 21, 2026. These are the prices on the filings, not adjusted for stock splits, and not a market price series.
Insider holdings over time
Is an insider building or unwinding a position? Shares held directly after each filing.
Dowling Ruth TMeyer Robert Joseph
Dowling Ruth T reported 27,711 shares held after the latest filing, against 21,262 at the first on record.
Insiders trading AMT
Everyone who filed a Form 4 for this ticker, by number of rows on record. "Bought" and "sold" count open-market purchases (code P) and sales only; awards, option exercises and shares withheld for tax are in the row count but not in those two columns. Showing 15 of 19.
| Insider | Role | Rows | Bought | Sold | Value bought | Value sold | Latest |
|---|---|---|---|---|---|---|---|
| Dowling Ruth T | EVP, Chief Admin Ofr, GC & Sec | 11 | 0 | 9 | — | $2.1M | July 29, 2026 |
| Smith Rodney M | EVP, CFO & Treasurer | 10 | 0 | 6 | — | $9.1M | March 11, 2026 |
| Noel Eugene M | EVP & Chief Operating Officer | 9 | 0 | 6 | — | $8.5M | March 11, 2026 |
| Vondran Steven O | President and CEO | 9 | 0 | 5 | — | $9.5M | March 11, 2026 |
| Meyer Robert Joseph | SVP & Chief Accounting Officer | 6 | 0 | 5 | — | $2.1M | July 29, 2026 |
| Font Juan | SVP, Pres. & CEO, CoreSite | 4 | 0 | 3 | — | $584K | March 11, 2026 |
| Kalathur Rajesh | Director | 3 | 2 | 0 | $996K | — | August 21, 2026 |
| Rossi Richard C | EVP & President, U.S. Tower | 3 | 0 | 2 | — | $412K | March 11, 2026 |
| REEVE PAMELA D A | Director | 2 | 0 | 0 | — | — | May 28, 2026 |
| REILLY EUGENE F | Director | 2 | 1 | 0 | $994K | — | March 10, 2026 |
| Blanchett Paul | SVP & Chief Accounting Officer | 1 | 0 | 0 | — | — | October 1, 2026 |
| Chambliss Kelly C | Director | 1 | 0 | 0 | — | — | March 10, 2026 |
| Clarke Teresa Hillary | Director | 1 | 0 | 0 | — | — | March 10, 2026 |
| Frank Kenneth R | Director | 1 | 0 | 0 | — | — | March 10, 2026 |
| HORMATS ROBERT D | Director | 1 | 0 | 0 | — | — | March 10, 2026 |
What kind of transactions these are 6 Form 4 codes
| Code | Meaning | Rows | Shares | Value at reported prices |
|---|---|---|---|---|
| A | Grant or award | 22 | 151,801 | — |
| S | Open-market sale | 19 | 122,587 | $23.2M |
| F | Shares withheld for tax | 17 | 49,533 | $9.2M |
| M | Option exercise or conversion | 6 | 218,064 | $10.3M |
| P | Open-market purchase | 3 | 11,054 | $2.0M |
| G | Gift | 1 | 810 | — |
What each code means: Form 4 transaction codes.
Members of Congress trading AMT
Members whose periodic transaction reports name this ticker. Amounts are the sums of the ranges as filed.
| Member | Seat | Trades | Bought | Sold | Range as filed | Latest |
|---|---|---|---|---|---|---|
| Dwight Evans | Representative (PA, District 3), Democrat | 1 | 0 | 1 | $1,001–$15K | May 11, 2026 |
| Richard McCormick | Representative (GA, District 7), Republican | 1 | 0 | 1 | $1,001–$15K | April 17, 2026 |
| Alan Armstrong | Senator (OK), Republican | 1 | 0 | 1 | $1,001–$15K | March 27, 2026 |
Insider transactions
| Filer | Side | Trade date | Disclosed | Lag | Shares | Price | Value | Flags | Source | Share |
|---|---|---|---|---|---|---|---|---|---|---|
| Blanchett Paul | Other A | October 1, 2026 | October 5, 2026 | 4d | 16,299 | — | — | Form 4 ↗ | ||
| Kalathur Rajesh | Buy P | August 21, 2026 | August 25, 2026 | 4d | 2,829 | $177 | $501K | Form 4 ↗ | ||
| Meyer Robert Joseph | Sell S | July 29, 2026 | July 31, 2026 | 2d | 5,000 | $179 | $894K | Form 4 ↗ | ||
| Dowling Ruth T | Sell S | July 29, 2026 | July 30, 2026 | 1d | 1,106 | $175 | $194K | 10b5-1 plan | Form 4 ↗ | |
| Dowling Ruth T | Sell S | July 28, 2026 | July 30, 2026 | 2d | 685 | $170 | $116K | 10b5-1 plan | Form 4 ↗ | |
| Meyer Robert Joseph | Sell F | June 1, 2026 | June 3, 2026 | 2d | 153 | $188 | $29K | Form 4 ↗ | ||
| REEVE PAMELA D A | Other G | May 28, 2026 | June 1, 2026 | 4d | 810 | — | — | Form 4 ↗ | ||
| Dowling Ruth T | Sell S | April 29, 2026 | April 30, 2026 | 1d | 416 | $178 | $74K | 10b5-1 plan | Form 4 ↗ | |
| Dowling Ruth T | Sell S | April 28, 2026 | April 30, 2026 | 2d | 556 | $178 | $99K | 10b5-1 plan | Form 4 ↗ | |
| Rossi Richard C | Sell F | March 11, 2026 | March 12, 2026 | 1d | 684 | $183 | $125K | Form 4 ↗ | ||
| Rossi Richard C | Sell F | March 10, 2026 | March 12, 2026 | 2d | 1,544 | $186 | $287K | Form 4 ↗ | ||
| Rossi Richard C | Other A | March 10, 2026 | March 12, 2026 | 2d | 6,448 | — | — | Form 4 ↗ | ||
| Font Juan | Sell F | March 11, 2026 | March 12, 2026 | 1d | 928 | $183 | $170K | Form 4 ↗ | ||
| Font Juan | Sell F | March 10, 2026 | March 12, 2026 | 2d | 1,834 | $186 | $341K | Form 4 ↗ | ||
| Font Juan | Other A | March 10, 2026 | March 12, 2026 | 2d | 8,060 | — | — | Form 4 ↗ | ||
| Smith Rodney M | Sell F | March 11, 2026 | March 12, 2026 | 1d | 1,295 | $183 | $237K | Form 4 ↗ | ||
| Smith Rodney M | Sell F | March 10, 2026 | March 12, 2026 | 2d | 12,433 | $186 | $2.3M | Form 4 ↗ | ||
| Smith Rodney M | Other A | March 10, 2026 | March 12, 2026 | 2d | 10,531 | — | — | Form 4 ↗ | ||
| Meyer Robert Joseph | Sell F | March 11, 2026 | March 12, 2026 | 1d | 684 | $183 | $125K | Form 4 ↗ | ||
| Meyer Robert Joseph | Sell F | March 10, 2026 | March 12, 2026 | 2d | 1,368 | $186 | $255K | Form 4 ↗ | ||
| Meyer Robert Joseph | Other A | March 10, 2026 | March 12, 2026 | 2d | 4,030 | — | — | Form 4 ↗ | ||
| Dowling Ruth T | Sell F | March 11, 2026 | March 12, 2026 | 1d | 863 | $183 | $158K | Form 4 ↗ | ||
| Dowling Ruth T | Sell F | March 10, 2026 | March 12, 2026 | 2d | 6,629 | $186 | $1.2M | Form 4 ↗ | ||
| Dowling Ruth T | Other A | March 10, 2026 | March 12, 2026 | 2d | 6,878 | — | — | Form 4 ↗ | ||
| Noel Eugene M | Sell F | March 11, 2026 | March 12, 2026 | 1d | 719 | $183 | $131K | Form 4 ↗ | ||
| Noel Eugene M | Sell F | March 10, 2026 | March 12, 2026 | 2d | 2,498 | $186 | $465K | Form 4 ↗ | ||
| Noel Eugene M | Other A | March 10, 2026 | March 12, 2026 | 2d | 8,167 | — | — | Form 4 ↗ | ||
| Vondran Steven O | Sell F | March 11, 2026 | March 12, 2026 | 1d | 2,158 | $183 | $395K | Form 4 ↗ | ||
| Vondran Steven O | Sell F | March 10, 2026 | March 12, 2026 | 2d | 15,269 | $186 | $2.8M | Form 4 ↗ | ||
| Vondran Steven O | Other A | March 10, 2026 | March 12, 2026 | 2d | 20,955 | — | — | Form 4 ↗ | ||
| Chambliss Kelly C | Other A | March 10, 2026 | March 12, 2026 | 2d | 1,209 | — | — | Form 4 ↗ | ||
| MACNAB CRAIG | Other A | March 10, 2026 | March 12, 2026 | 2d | 1,209 | — | — | Form 4 ↗ | ||
| Kalathur Rajesh | Buy P | March 10, 2026 | March 12, 2026 | 2d | 2,671 | $185 | $495K | Form 4 ↗ | ||
| Kalathur Rajesh | Other A | March 10, 2026 | March 12, 2026 | 2d | 1,209 | — | — | Form 4 ↗ | ||
| HORMATS ROBERT D | Other A | March 10, 2026 | March 12, 2026 | 2d | 1,209 | — | — | Form 4 ↗ | ||
| Clarke Teresa Hillary | Other A | March 10, 2026 | March 12, 2026 | 2d | 1,209 | — | — | Form 4 ↗ | ||
| REEVE PAMELA D A | Other A | March 10, 2026 | March 12, 2026 | 2d | 1,209 | — | — | Form 4 ↗ | ||
| Ray Neville R | Other A | March 10, 2026 | March 12, 2026 | 2d | 1,209 | — | — | Form 4 ↗ | ||
| REILLY EUGENE F | Other A | March 10, 2026 | March 12, 2026 | 2d | 1,209 | — | — | Form 4 ↗ | ||
| Tanner Bruce L | Other A | March 10, 2026 | March 12, 2026 | 2d | 1,209 | — | — | Form 4 ↗ | ||
| Lieblein Grace | Other A | March 10, 2026 | March 12, 2026 | 2d | 1,209 | — | — | Form 4 ↗ | ||
| Frank Kenneth R | Other A | March 10, 2026 | March 12, 2026 | 2d | 1,209 | — | — | Form 4 ↗ | ||
| Vondran Steven O | Option / conversion M | March 4, 2026 | March 6, 2026 | 2d | 33,482 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| Vondran Steven O | Sell S | March 4, 2026 | March 6, 2026 | 2d | 1,773 | $190 | $337K | 10b5-1 plan | Form 4 ↗ | |
| Vondran Steven O | Sell S | March 4, 2026 | March 6, 2026 | 2d | 16,625 | $189 | $3.1M | 10b5-1 plan | Form 4 ↗ | |
| Vondran Steven O | Sell S | March 4, 2026 | March 6, 2026 | 2d | 15,084 | $188 | $2.8M | 10b5-1 plan | Form 4 ↗ | |
| Vondran Steven O | Option / conversion M | March 4, 2026 | March 6, 2026 | 2d | 33,482 | $95 | $3.2M | 10b5-1 plan | Form 4 ↗ | |
| Dowling Ruth T | Sell S | March 4, 2026 | March 6, 2026 | 2d | 682 | $189 | $129K | 10b5-1 plan | Form 4 ↗ | |
| Noel Eugene M | Option / conversion M | March 2, 2026 | March 4, 2026 | 2d | 41,209 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| Noel Eugene M | Sell S | March 2, 2026 | March 4, 2026 | 2d | 6,985 | $192 | $1.3M | 10b5-1 plan | Form 4 ↗ | |
| Noel Eugene M | Sell S | March 2, 2026 | March 4, 2026 | 2d | 21,604 | $191 | $4.1M | 10b5-1 plan | Form 4 ↗ | |
| Noel Eugene M | Sell S | March 2, 2026 | March 4, 2026 | 2d | 7,378 | $190 | $1.4M | 10b5-1 plan | Form 4 ↗ | |
| Noel Eugene M | Sell S | March 2, 2026 | March 4, 2026 | 2d | 5,242 | $189 | $993K | 10b5-1 plan | Form 4 ↗ | |
| Noel Eugene M | Option / conversion M | March 2, 2026 | March 4, 2026 | 2d | 41,209 | $95 | $3.9M | 10b5-1 plan | Form 4 ↗ | |
| Meyer Robert Joseph | Sell S | February 27, 2026 | March 3, 2026 | 4d | 4,454 | $187 | $832K | Form 4 ↗ | ||
| Dowling Ruth T | Sell S | February 27, 2026 | March 3, 2026 | 4d | 656 | $186 | $122K | 10b5-1 plan | Form 4 ↗ | |
| Dowling Ruth T | Other A | February 25, 2026 | February 27, 2026 | 2d | 11,083 | — | — | Form 4 ↗ | ||
| Smith Rodney M | Other A | February 25, 2026 | February 27, 2026 | 2d | 21,425 | — | — | Form 4 ↗ | ||
| Vondran Steven O | Other A | February 25, 2026 | February 27, 2026 | 2d | 24,626 | — | — | Form 4 ↗ | ||
| Smith Rodney M | Option / conversion M | February 17, 2026 | February 19, 2026 | 2d | 34,341 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| Smith Rodney M | Sell S | February 17, 2026 | February 19, 2026 | 2d | 1 | $193 | $193 | 10b5-1 plan | Form 4 ↗ | |
| Smith Rodney M | Sell S | February 17, 2026 | February 19, 2026 | 2d | 22,658 | $192 | $4.4M | 10b5-1 plan | Form 4 ↗ | |
| Smith Rodney M | Sell S | February 17, 2026 | February 19, 2026 | 2d | 9,596 | $192 | $1.8M | 10b5-1 plan | Form 4 ↗ | |
| Smith Rodney M | Sell S | February 17, 2026 | February 19, 2026 | 2d | 2,086 | $190 | $397K | 10b5-1 plan | Form 4 ↗ | |
| Smith Rodney M | Option / conversion M | February 17, 2026 | February 19, 2026 | 2d | 34,341 | $95 | $3.3M | 10b5-1 plan | Form 4 ↗ | |
| Font Juan | Sell F | January 3, 2026 | January 6, 2026 | 3d | 419 | $175 | $73K | Form 4 ↗ | ||
| REILLY EUGENE F | Buy P | October 31, 2025 | November 4, 2025 | 4d | 5,554 | $179 | $994K | Form 4 ↗ | ||
| Dowling Ruth T | Sell F | October 1, 2025 | October 3, 2025 | 2d | 55 | $193 | $11K | Form 4 ↗ |
Congressional trades
| Filer | Side | Trade date | Disclosed | Lag | Shares | Price | Value | Flags | Source | Share |
|---|---|---|---|---|---|---|---|---|---|---|
| Alan Armstrong | Sell | March 27, 2026 | July 21, 2026 | 116d | — | — | $1,001–$15K | late | Senate PTR ↗ | |
| Dwight Evans | Sell | May 11, 2026 | May 15, 2026 | 4d | — | — | $1,001–$15K | House PTR ↗ | ||
| Richard McCormick | Sell | April 17, 2026 | May 12, 2026 | 25d | — | — | $1,001–$15K | House PTR ↗ |
Related stocks
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Guides for this page
- What is SEC Form 4? Who files: officers, directors and owners of more than 10% of a class of the company's shares.
- Form 4 transaction codes P = purchase. S = sale. These are the two market trades.
- Insider buying vs insider selling Selling outweighs buying by a wide margin in normal times.
- How to read a congressional trade report Owner tells you whose asset it was: the member, the spouse, a dependent child, or held jointly.
- Why congressional trade amounts are ranges There are ten ranges; the lowest is $1,001–$15,000 and the highest is over $50,000,000.
Sources and method
| Source | Filings | Rows | First filed | Newest filed | Read the originals |
|---|---|---|---|---|---|
| House Clerk, periodic transaction reports | 2 | 2 | May 12, 2026 | May 15, 2026 | House Clerk search |
| Senate eFD, periodic transaction reports | 1 | 1 | July 21, 2026 | July 21, 2026 | Senate eFD search |
| SEC EDGAR, Form 4 | 37 | 68 | October 3, 2025 | October 5, 2026 | Form 4 list on EDGAR |
Site built October 22, 2026. Every row in the tables above links to its own filing. To quote a figure, use the Cite button at the top of the page; see how to cite and reuse.
Insider rows are Form 4 filings for this issuer from SEC EDGAR; congressional rows are periodic transaction reports parsed from the House Clerk and the Senate eFD. Values use the reported price for Form 4 and the disclosed range for Congress. See methodology and corrections.
Not investment advice. Disclosures are shown as filed and may lag the trade or be amended. No recommendation is made or implied.