13F Pro13F Pro

SEC Form 4 reporting owner

Clarke Teresa Hillary

Clarke Teresa Hillary has filed 17 Form 4 transactions reported between April 28, 2023 and October 20, 2026, as Director of AMERICAN TOWER CORP /MA/ and Director of Arthur J. Gallagher & Co..

Name as filed: Clarke Teresa Hillary

Follow Clarke Teresa Hillary and get an alert on every new Form 4

Clarke Teresa Hillary holds 5,645 shares of AMT, worth $1.1M, under 0.01% of the company.

As of their Apr 28, 2023 Form 4 (filed Oct 22, 2026) · the filing on SEC EDGAR · valued at the live price of $187.34 · 466.0M shares outstanding on Jul 21, 2026

No Form 4 has been filed for AMT since Apr 28, 2023. The holding may have changed, or Clarke Teresa Hillary may no longer be an insider.

Open-market buys, 24 mo
$48K
8 lines
Open-market sales, 24 mo
None
reported
Companies
2
with Form 4 filings
Latest transaction
Oct 20, 2026
transaction date

Roles and reported holdings

How their buys did since

15 open-market purchases against today’s price: -2.0% on average, -0.6% weighted by dollars spent.

DatePaidReturn
Oct 20, 2026AMT$183.20+2.3%now $187.34
Jul 13, 2026AMT$167.52+11.8%now $187.34
Apr 28, 2026AMT$177.08+5.8%now $187.34
Feb 2, 2026AMT$178.04+5.2%now $187.34
Oct 20, 2025AMT$189.12-0.9%now $187.34
Jul 11, 2025AMT$223.23-16.1%now $187.34
Apr 28, 2025AMT$209.33-10.5%now $187.34
Feb 3, 2025AMT$187.27+0.0%now $187.34
Oct 25, 2024AMT$227.42-17.6%now $187.34
Jul 12, 2024AMT$204.28-8.3%now $187.34
Apr 26, 2024AMT$172.82+8.4%now $187.34
Feb 1, 2024AMT$199.95-6.3%now $187.34
Oct 27, 2023AMT$171.52+9.2%now $187.34
Jul 10, 2023AMT$193.78-3.3%now $187.34
Apr 28, 2023AMT$205.93-9.0%now $187.34

Each purchase at the price on its Form 4, against the latest trade or close, adjusted for stock splits. Past returns say nothing about future ones.

Transaction history

All 17 reported transactions, newest first. Every row links to the Form 4 on SEC EDGAR.

DateCompanyTypeSharesValueFiling
Oct 20, 2026AMTDirectorOpen-market purchaseCode P · direct43$8K@ $183.20Form 4
Jul 13, 2026AMTDirectorOpen-market purchaseCode P · direct46$8K@ $167.52Form 4
May 12, 2026AJGDirectorGrant or awardCode A · direct1,110—Form 4
Apr 28, 2026AMTDirectorOpen-market purchaseCode P · direct44$8K@ $177.08Form 4
Mar 10, 2026AMTDirectorGrant or awardCode A · direct1,209—Form 4
Feb 2, 2026AMTDirectorOpen-market purchaseCode P · direct31$5K@ $178.04Form 4
Oct 20, 2025AMTDirectorOpen-market purchaseCode P · direct29$5K@ $189.12Form 4
Jul 11, 2025AMTDirectorOpen-market purchaseCode P · direct24$5K@ $223.23Form 4
Apr 28, 2025AMTDirectorOpen-market purchaseCode P · direct25$5K@ $209.33Form 4
Feb 3, 2025AMTDirectorOpen-market purchaseCode P · direct18$3K@ $187.27Form 4
Oct 25, 2024AMTDirectorOpen-market purchaseCode P · direct14$3K@ $227.42Form 4
Jul 12, 2024AMTDirectorOpen-market purchaseCode P · direct16$3K@ $204.28Form 4
Apr 26, 2024AMTDirectorOpen-market purchaseCode P · direct19$3K@ $172.82Form 4
Feb 1, 2024AMTDirectorOpen-market purchaseCode P · direct8$2K@ $199.95Form 4
Oct 27, 2023AMTDirectorOpen-market purchaseCode P · direct8$1K@ $171.52Form 4
Jul 10, 2023AMTDirectorOpen-market purchaseCode P · direct7$1K@ $193.78Form 4
Apr 28, 2023AMTDirectorOpen-market purchaseCode P · direct7$1K@ $205.93Form 4

How this page is built

Every row comes from a Form 4 filed with the SEC, which officers, directors and holders of more than 10% of a company’s stock must file within two business days of a trade. Transactions are grouped by the reporting owner’s name as filed (spacing, capitals and punctuation ignored); two different people filing under an identical name would appear together, and one person filing under two spellings appears on two pages.

Open-market totals count code P purchases and code S sales over the last 24 months. The same trade reported on more than one filing is counted once; when another owner (for example a fund and its general partner) reports the identical trade, they are listed beside it. Holdings are the shares each ownership line is left at by the person’s latest Form 4, 4/A or 5: held directly, and through each trust or entity named on the filing. A second class of common stock that converts into the listed one counts as shares; options and restricted stock units are listed but not counted. Value uses the latest trade or close, and the share of the company uses the latest shares-outstanding count the company reported. Where a filing has not yet been read line by line, the figure comes from the latest direct and indirect lines that traded and is shown as “at least”.

This page describes what was filed with the SEC; it is not investment advice or a recommendation to buy or sell any security.