Transactions
11
Insider / AMERICAN TOWER CORP /MA/
Dowling Ruth T
EVP, Chief Admin Ofr, GC & Sec at AMERICAN TOWER CORP /MA/
- Company
- AMERICAN TOWER CORP /MA/
- Ticker
- AMT
- First filing on record
- October 3, 2025
- Latest trade on record
- July 29, 2026
- SEC filings
- EDGAR ↗
Dowling Ruth T, EVP, Chief Admin Ofr, GC & Sec at AMERICAN TOWER CORP /MA/, has disclosed 11 transactions in AMT since October 3, 2025: 0 purchases (0 open-market buys) and 9 sales, worth about $2.1M at the reported prices. The latest was filed July 30, 2026, 1 day after the trade.
Open-market buys
0
Sales
9
Avg. disclosure lag
1.9d
Trading in charts
Trade timeline
When does this person trade, how big, and in which direction? Every trade in the last 12 months.
Bought (above the line)Sold (below the line)Other transaction
In the last 12 months Dowling Ruth T made no purchases and 8 sales worth $2.1M, plus 2 other transactions. Dot size is the dollar amount.
Portfolio mix
Which stocks does this person trade most? Tile size is dollars traded, all time on record.
Dowling Ruth T has traded 1 stock on record; the largest by dollars is AMT.
Reporting lag
Does this person report on time? One bar per filing against the Form 4 deadline.
On timeLate
0 of 7 filings on record were reported after the Form 4 deadline (two business days, counted here as 4 calendar days).
What kind of transactions
Most Form 4 rows are pay arriving or tax being withheld, not a decision to buy or sell. Only code P is an open-market purchase and code S an open-market sale. What each code means: Form 4 transaction codes.
| Code | Meaning | Rows | Shares | Value |
|---|---|---|---|---|
| S | Open-market sale | 6 | 4,101 | $733K |
| F | Shares withheld for tax | 3 | 7,547 | $1.4M |
| A | Grant or award | 2 | 17,961 | — |
| Year | Rows | Bought | Sold |
|---|---|---|---|
| 2026 | 10 | 0 | 8 · $2.1M |
| 2025 | 1 | 0 | 1 · $11K |
Transactions
| Security | Side | Trade date | Disclosed | Lag | Shares | Price | Value | Flags | Source | Share |
|---|---|---|---|---|---|---|---|---|---|---|
| AMT | Sell S | July 29, 2026 | July 30, 2026 | 1d | 1,106 | $175 | $194K | 10b5-1 plan | Form 4 ↗ | |
| AMT | Sell S | July 28, 2026 | July 30, 2026 | 2d | 685 | $170 | $116K | 10b5-1 plan | Form 4 ↗ | |
| AMT | Sell S | April 29, 2026 | April 30, 2026 | 1d | 416 | $178 | $74K | 10b5-1 plan | Form 4 ↗ | |
| AMT | Sell S | April 28, 2026 | April 30, 2026 | 2d | 556 | $178 | $99K | 10b5-1 plan | Form 4 ↗ | |
| AMT | Sell F | March 11, 2026 | March 12, 2026 | 1d | 863 | $183 | $158K | Form 4 ↗ | ||
| AMT | Sell F | March 10, 2026 | March 12, 2026 | 2d | 6,629 | $186 | $1.2M | Form 4 ↗ | ||
| AMT | Other A | March 10, 2026 | March 12, 2026 | 2d | 6,878 | — | — | Form 4 ↗ | ||
| AMT | Sell S | March 4, 2026 | March 6, 2026 | 2d | 682 | $189 | $129K | 10b5-1 plan | Form 4 ↗ | |
| AMT | Sell S | February 27, 2026 | March 3, 2026 | 4d | 656 | $186 | $122K | 10b5-1 plan | Form 4 ↗ | |
| AMT | Other A | February 25, 2026 | February 27, 2026 | 2d | 11,083 | — | — | Form 4 ↗ | ||
| AMT | Sell F | October 1, 2025 | October 3, 2025 | 2d | 55 | $193 | $11K | Form 4 ↗ |
Filings
| Filed | Form | Accession | Rows | Status | Source |
|---|---|---|---|---|---|
| July 30, 2026 | Form 4 | 0001053507-26-000135 | 2 | published | EDGAR ↗ |
| April 30, 2026 | Form 4 | 0001053507-26-000105 | 2 | published | EDGAR ↗ |
| March 12, 2026 | Form 4 | 0001053507-26-000074 | 3 | published | EDGAR ↗ |
| March 6, 2026 | Form 4 | 0001053507-26-000043 | 1 | published | EDGAR ↗ |
| March 3, 2026 | Form 4 | 0001960785-26-000004 | 1 | published | EDGAR ↗ |
| February 27, 2026 | Form 4 | 0001960785-26-000002 | 1 | published | EDGAR ↗ |
| October 3, 2025 | Form 4 | 0001053507-25-000144 | 1 | published | EDGAR ↗ |
Other insiders at AMERICAN TOWER CORP /MA/
- Lieblein Grace Director 15 rows
- Smith Rodney M EVP, CFO & Treasurer 10 rows
- Vondran Steven O President and CEO 10 rows
- Noel Eugene M EVP & Chief Operating Officer 9 rows
- MACNAB CRAIG Director 8 rows
- Kalathur Rajesh Director 7 rows
- Meyer Robert Joseph SVP & Chief Accounting Officer 6 rows
- Font Juan SVP, Pres. & CEO, CoreSite 4 rows
- Rossi Richard C EVP & President, U.S. Tower 3 rows
- Clarke Teresa Hillary Director 2 rows
Everyone on file, with contracts and lobbying under the company's name: AMERICAN TOWER CORP /MA/.
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.
- Rule 10b5-1 trading plans The plan must be set up when the insider has no important non-public information.
- What disclosure data cannot tell you Filings are late by design: up to 45 days for Congress, two business days for insiders.
Sources and method
| Source | Filings | Rows | First filed | Newest filed | Read the originals |
|---|---|---|---|---|---|
| SEC EDGAR, Form 4 | 7 | 11 | October 3, 2025 | July 30, 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.
Every row comes from the reporting owner's Form 4 as filed with the SEC (EDGAR ownership XML), read daily. "Value" is shares × the reported price; code P is an open-market purchase, S a sale, M an option exercise, A a grant. The lag is the filing date minus the trade date; Form 4 is due within two business days. Amendments (4/A) are not merged. Details on the methodology page; report an error on corrections.
Not investment advice. Figures are public disclosures shown as filed; they may lag the trade and may be amended later. No recommendation is made or implied.