Transactions
17
Insider / AMERICAN TOWER CORP /MA/
Clarke Teresa Hillary
Director at AMERICAN TOWER CORP /MA/
- Company
- AMERICAN TOWER CORP /MA/
- First filing on record
- March 12, 2026
- Latest trade on record
- October 20, 2026
- SEC filings
- EDGAR ↗
Clarke Teresa Hillary, Director at AMERICAN TOWER CORP /MA/, has disclosed 17 transactions in AMT, AJG since March 12, 2026: 15 purchases (15 open-market buys) and 0 sales, worth about $64K at the reported prices. The latest was filed October 22, 2026, 2 days after the trade; 14 filings were late against the 2-business-day Form 4 deadline.
Open-market buys
15
Sales
0
Avg. disclosure lag
563.2d
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 Clarke Teresa Hillary made 4 purchases worth $29K and no sales, 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.
Clarke Teresa Hillary 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
1 of 3 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 |
|---|---|---|---|---|
| P | Open-market purchase | 15 | 338 | $64K |
| A | Grant or award | 2 | 2,319 | — |
| Year | Rows | Bought | Sold |
|---|---|---|---|
| 2026 | 6 | 4 · $29K | 0 |
| 2025 | 4 | 4 · $19K | 0 |
| 2024 | 4 | 4 · $11K | 0 |
| 2023 | 3 | 3 · $4,218 | 0 |
Transactions
| Security | Side | Trade date | Disclosed | Lag | Shares | Price | Value | Flags | Source | Share |
|---|---|---|---|---|---|---|---|---|---|---|
| AMT | Buy P | October 20, 2026 | October 22, 2026 | 2d | 43 | $183 | $7,864 | Form 4 ↗ | ||
| AMT | Buy P | July 13, 2026 | October 22, 2026 | 101d | 46 | $168 | $7,781 | late | Form 4 ↗ | |
| AMT | Buy P | April 28, 2026 | October 22, 2026 | 177d | 44 | $177 | $7,703 | late | Form 4 ↗ | |
| AMT | Buy P | February 2, 2026 | October 22, 2026 | 262d | 31 | $178 | $5,468 | late | Form 4 ↗ | |
| AMT | Buy P | October 20, 2025 | October 22, 2026 | 367d | 29 | $189 | $5,420 | late | Form 4 ↗ | |
| AMT | Buy P | July 11, 2025 | October 22, 2026 | 468d | 24 | $223 | $5,379 | late | Form 4 ↗ | |
| AMT | Buy P | April 28, 2025 | October 22, 2026 | 542d | 25 | $209 | $5,335 | late | Form 4 ↗ | |
| AMT | Buy P | February 3, 2025 | October 22, 2026 | 626d | 18 | $187 | $3,292 | late | Form 4 ↗ | |
| AMT | Buy P | October 25, 2024 | October 22, 2026 | 727d | 14 | $227 | $3,268 | late | Form 4 ↗ | |
| AMT | Buy P | July 12, 2024 | October 22, 2026 | 832d | 16 | $204 | $3,243 | late | Form 4 ↗ | |
| AMT | Buy P | April 26, 2024 | October 22, 2026 | 909d | 19 | $173 | $3,212 | late | Form 4 ↗ | |
| AMT | Buy P | February 1, 2024 | October 22, 2026 | 994d | 8 | $200 | $1,536 | late | Form 4 ↗ | |
| AMT | Buy P | October 27, 2023 | October 22, 2026 | 1091d | 8 | $172 | $1,450 | late | Form 4 ↗ | |
| AMT | Buy P | July 10, 2023 | October 22, 2026 | 1200d | 7 | $194 | $1,394 | late | Form 4 ↗ | |
| AMT | Buy P | April 28, 2023 | October 22, 2026 | 1273d | 7 | $206 | $1,374 | late | Form 4 ↗ | |
| AJG | Other A | May 12, 2026 | May 13, 2026 | 1d | 1,110 | — | — | Form 4 ↗ | ||
| AMT | Other A | March 10, 2026 | March 12, 2026 | 2d | 1,209 | — | — | Form 4 ↗ |
Filings
| Filed | Form | Accession | Rows | Status | Source |
|---|---|---|---|---|---|
| October 22, 2026 | Form 4 | 0001053507-26-000151 | 15 | published | EDGAR ↗ |
| May 13, 2026 | Form 4 | 0000354190-26-000156 | 1 | published | EDGAR ↗ |
| March 12, 2026 | Form 4 | 0001053507-26-000061 | 1 | published | EDGAR ↗ |
Other insiders at AMERICAN TOWER CORP /MA/
- GALLAGHER THOMAS JOSEPH President 20 rows
- GALLAGHER J PATRICK JR CEO 18 rows
- Gallagher Patrick Murphy Chief Operating Officer 18 rows
- Mead Christopher E VICE PRESIDENT 18 rows
- Jain Vishal VICE PRESIDENT 17 rows
- HOWELL DOUGLAS K VP & Chief Financial Officer 16 rows
- Hudson Scott R Vice President 15 rows
- Lieblein Grace Director 15 rows
- Bay Walter D. General Counsel 14 rows
- Pesch Michael Robert Vice President 12 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.
- 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 | 3 | 17 | March 12, 2026 | October 22, 2026 | Form 4 list on EDGAR |
Site built October 27, 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.