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SEC EDGAR · Forms 3/4/5Updated through Oct 30, 2026•45 filings

AMT

AMERICAN TOWER CORP /MA/

Net purchases of $500.7K over the last 3 months

1 buyer account for the net balance. There is no cluster of three distinct buyers within 30 days. We found no CEO/CFO purchases over 12 months.

How to read this signal

Only open-market P purchases and S sales count toward the signal. Vesting, options, taxes and gifts remain in the source data but do not trigger alerts. Rule 10b5-1 trades are shown as informational.

JSON example

3-month balance

+$500,733

1 buyers · 0 sellers

12-month purchases

$2,010,732

3 distinct insiders

12-month sales

$23,238,977

5 distinct insiders

Highlighted alerts

20

17 Rule 10b5-1 trades treated as informational

Buying cluster · 30 days

Fewer than three distinct buyers

CEO/CFO purchases · 12 months

No executive purchases found

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Form 4 raw → Raspberry

The value is in what we do not call a signal.

The SEC XML stores every transaction. Raspberry keeps that evidence, reads the footnotes and separates voluntary open-market activity from vesting, option exercises, gifts, tax withholding, stock purchase and dividend reinvestment plans and pre-programmed 10b5-1 trades.

85
Raw transactions
Everything returned by the filing
37
Voluntary view
P/S trades after deterministic checks
47
Administrative noise
Stored, never alerted
23
10b5-1
Shown as informational
SEC ownership XML facts
Code
P
Shares
42.93
Price
$183.20
Footnotes
2

Reflects shares acquired pursuant to a dividend reinvestment plan administered by the reporting person's broker, and inadvertently not previously reported. Reflects shares acquired pursuant to a dividend reinvestment plan administered by the reporting person's broker.

Raspberry interpretation
Informational — no alert

Reason: plan_purchase.

Verify in SEC EDGAR

Recent transactions

Voluntary purchases and sales; administrative noise stays hidden.

37 transactions

Kalathur Rajesh

Director

PurchaseAlert
Shares
2,829
Price
$177.00
Value
$500,733
Open SEC filing

Meyer Robert Joseph

SVP & Advisor to the CFO

SaleAlert
Shares
5,000
Price
$178.89
Value
$894,450
Open SEC filing

Dowling Ruth T

EVP, Chief Admin Ofr, GC & Sec

Sale 10b5-1
Shares
1,106
Price
$174.96
Value
$193,506
Open SEC filing

Dowling Ruth T

EVP, Chief Admin Ofr, GC & Sec

Sale 10b5-1
Shares
685
Price
$169.54
Value
$116,135
Open SEC filing

Clarke Teresa Hillary

Director

PurchaseAlert
Shares
46.45
Price
$167.52
Value
$7,781
Open SEC filing

Dowling Ruth T

EVP, Chief Admin Ofr, GC & Sec

Sale 10b5-1
Shares
416
Price
$177.54
Value
$73,857
Open SEC filing

Clarke Teresa Hillary

Director

PurchaseAlert
Shares
43.5
Price
$177.08
Value
$7,703
Open SEC filing

Dowling Ruth T

EVP, Chief Admin Ofr, GC & Sec

Sale 10b5-1
Shares
556
Price
$178.48
Value
$99,235
Open SEC filing

Kalathur Rajesh

Director

PurchaseAlert
Shares
2,671
Price
$185.30
Value
$494,936
Open SEC filing

Vondran Steven O

President and CEO

Sale 10b5-1
Shares
1,773
Price
$189.82
Value
$336,551
Open SEC filing

Vondran Steven O

President and CEO

Sale 10b5-1
Shares
16,625
Price
$188.82
Value
$3,139,133
Open SEC filing

Vondran Steven O

President and CEO

Sale 10b5-1
Shares
15,084
Price
$187.90
Value
$2,834,284
Open SEC filing

Dowling Ruth T

EVP, Chief Admin Ofr, GC & Sec

Sale 10b5-1
Shares
682
Price
$188.51
Value
$128,564
Open SEC filing

Noel Eugene M

EVP & Chief Operating Officer

Sale 10b5-1
Shares
6,985
Price
$192.03
Value
$1,341,330
Open SEC filing

Noel Eugene M

EVP & Chief Operating Officer

Sale 10b5-1
Shares
21,604
Price
$191.40
Value
$4,135,006
Open SEC filing

Noel Eugene M

EVP & Chief Operating Officer

Sale 10b5-1
Shares
7,378
Price
$190.29
Value
$1,403,960
Open SEC filing

Noel Eugene M

EVP & Chief Operating Officer

Sale 10b5-1
Shares
5,242
Price
$189.36
Value
$992,625
Open SEC filing

Dowling Ruth T

EVP, Chief Admin Ofr, GC & Sec

Sale 10b5-1
Shares
656
Price
$186.16
Value
$122,121
Open SEC filing

Meyer Robert Joseph

SVP & Chief Accounting Officer

SaleAlert
Shares
4,454
Price
$186.73
Value
$831,695
Open SEC filing

Smith Rodney M

EVP, CFO & Treasurer

Sale 10b5-1
Shares
1
Price
$193.13
Value
$193.13
Open SEC filing

Smith Rodney M

EVP, CFO & Treasurer

Sale 10b5-1
Shares
22,658
Price
$192.49
Value
$4,361,438
Open SEC filing

Smith Rodney M

EVP, CFO & Treasurer

Sale 10b5-1
Shares
9,596
Price
$191.52
Value
$1,837,826
Open SEC filing

Smith Rodney M

EVP, CFO & Treasurer

Sale 10b5-1
Shares
2,086
Price
$190.35
Value
$397,070
Open SEC filing

Clarke Teresa Hillary

Director

PurchaseAlert
Shares
30.71
Price
$178.04
Value
$5,468
Open SEC filing

REILLY EUGENE F

Director

PurchaseAlert
Shares
5,554
Price
$178.99
Value
$994,110
Open SEC filing

Clarke Teresa Hillary

Director

PurchaseAlert
Shares
28.66
Price
$189.12
Value
$5,420
Open SEC filing

Font Juan

SVP, Pres. & CEO, CoreSite

SaleAlert
Shares
720
Price
$208.33
Value
$149,998
Open SEC filing

Clarke Teresa Hillary

Director

PurchaseAlert
Shares
24.1
Price
$223.23
Value
$5,379
Open SEC filing

Clarke Teresa Hillary

Director

PurchaseAlert
Shares
25.49
Price
$209.33
Value
$5,335
Open SEC filing

Clarke Teresa Hillary

Director

PurchaseAlert
Shares
17.58
Price
$187.27
Value
$3,292
Open SEC filing

Clarke Teresa Hillary

Director

PurchaseAlert
Shares
14.37
Price
$227.42
Value
$3,268
Open SEC filing

Clarke Teresa Hillary

Director

PurchaseAlert
Shares
15.87
Price
$204.28
Value
$3,243
Open SEC filing

Clarke Teresa Hillary

Director

PurchaseAlert
Shares
18.59
Price
$172.82
Value
$3,212
Open SEC filing

Clarke Teresa Hillary

Director

PurchaseAlert
Shares
7.68
Price
$199.95
Value
$1,536
Open SEC filing

Clarke Teresa Hillary

Director

PurchaseAlert
Shares
8.45
Price
$171.52
Value
$1,450
Open SEC filing

Clarke Teresa Hillary

Director

PurchaseAlert
Shares
7.19
Price
$193.78
Value
$1,394
Open SEC filing

Clarke Teresa Hillary

Director

PurchaseAlert
Shares
6.67
Price
$205.93
Value
$1,374
Open SEC filing

“Alert” means a voluntary, unscheduled transaction according to the filing; it is not an investment recommendation. Official source: SEC EDGAR.