AMT American Tower Corp.

NYSE
$176.94

American Tower Corp. (AMT) Insider Activity

What the officers, directors and large holders did with their own shares. Only open-market purchases and sales count toward the totals — grants, option exercises and shares withheld for tax are compensation mechanics, not decisions, and they're listed separately below.

30D 90D 6M 1Y
Insider signal In line Selling ran in line with AMT's own trailing one-year pace, with 93% of sale value under a prearranged plan.
Cluster activity 1 buyer in the last 30 days 1 buyer in the last 90 days 2 sellers in the last 90 days
Insiders buying
2
3 transactions
Insiders selling
5
19 transactions
Purchases
$2.0M
11,054 shares
Sales
$23.2M
122,587 shares
Net activity
-$21.2M
purchases less sales

How much of that selling was preplanned? 93% planned / 7% discretionary

10b5-1 plan sales $21.5M 17 transactions · 113,133 shares
Discretionary sales $1.7M 2 transactions · 9,454 shares

Largest single sale: $4.4M.

Where they traded

Buy Sell Dot area is proportional to transaction value.

Last open-market purchase: August 21, 2026 , by Kalathur Rajesh .

Recent open-market activity

Date Insider Role Action Shares Price Value Held after
Kalathur Rajesh Director Buy 2,829 $177.00 $500.7K 7,765
Meyer Robert Joseph SVP & Advisor to the CFO Sell 5,000 $178.89 $894.5K 21,428 −18.9% of holding
Dowling Ruth T EVP, Chief Admin Ofr, GC & Sec Sell 10b5-1 1,106 $174.96 $193.5K 27,711 −3.8% of holding
Dowling Ruth T EVP, Chief Admin Ofr, GC & Sec Sell 10b5-1 685 $169.54 $116.1K 28,817 −2.3% of holding
Dowling Ruth T EVP, Chief Admin Ofr, GC & Sec Sell 10b5-1 416 $177.54 $73.9K 29,461 −1.4% of holding
Dowling Ruth T EVP, Chief Admin Ofr, GC & Sec Sell 10b5-1 556 $178.48 $99.2K 29,877 −1.8% of holding
Kalathur Rajesh Director Buy 2,671 $185.30 $494.9K 4,936
Vondran Steven O 3 fills President and CEO Sell 10b5-1 33,482 $188.46 $6.3M 123,772 −21.3% of holding
Dowling Ruth T EVP, Chief Admin Ofr, GC & Sec Sell 10b5-1 682 $188.51 $128.6K 31,047 −2.1% of holding
Noel Eugene M 4 fills EVP & Chief Operating Officer Sell 10b5-1 41,209 $191.05 $7.9M 65,559 −38.6% of holding
Meyer Robert Joseph SVP & Chief Accounting Officer Sell 4,454 $186.73 $831.7K 24,461 −15.4% of holding
Dowling Ruth T EVP, Chief Admin Ofr, GC & Sec Sell 10b5-1 656 $186.16 $122.1K 31,729 −2% of holding
Smith Rodney M 4 fills EVP, CFO & Treasurer Sell 10b5-1 34,341 $192.09 $6.6M 106,569 −24.4% of holding
REILLY EUGENE F Director Buy 5,554 $178.99 $994.1K 5,689

Form 4s are due within two business days of a transaction, so this is close to real time — unlike the quarterly 13F data on the Institutional tab. A single large sale often reflects a prearranged 10b5-1 plan rather than a fresh view, so read a pattern of sales rather than any one of them.