AMERICAN TOWER CORP /MA/ (AMT) made 1,000 filings in its most recent EDGAR window (2017-05-02 to 2026-10-05) — about 96 routine filings per year once routine debt and shelf offerings are excluded. 503 of the filings are insider forms (Form 4: 476, Form 3: 19, Form 5: 8), i.e. 50.3% of routine filings.
Of the 1,000 filings in this window, 98 (9.8%) are routine debt or shelf offerings (form 424B*, FWP, S-3*), which are excluded from the routine rate below because large issuers generate them continuously.
Form type
Filings in window
4
476
8-K
232
144
39
424B2
32
424B5
31
FWP
29
10-Q
28
3
19
SC 13G/A
18
DEFA14A
10
DEF 14A
9
10-K
9
CERT
8
8-A12B
8
Activity over the window
Metric
Value
Window covered
2017-05-02 → 2026-10-05
Span
9.42 years
All filings in window
1,000
Routine filings (offerings excluded)
902
Routine filings per year
96
Insider forms as share of routine filings
50.3%
Routine debt/shelf offering share
9.8%
Former names on record: AMERICAN TOWER SYSTEMS CORP