MarketPeel
Insider Trading Intelligence
RD

Ruth T. Dowling

AMT
EVP, CHIEF ADMIN OFR, GC & SEC · AMERICAN TOWER CORP /MA/ · CIK 0001960785
FILING MIX · LIFETIME26%/74%
BUYS
5
SELLS
14
TOTAL VALUE
$2.88M
COMPANIES
1
ACTIVE SINCE
Mar 2023
HOLDINGS NOW
29,461
AVG SELL PX
$192.51
TRADE KIND
SHOWING 19 / 19
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
4 backtested trades · 8 horizons · 14 pending
Forward-return performance of every backtestable P/S trade by Ruth T. Dowling, measured at 8 horizons from 7 days to 2 years. Deduped per economic event so co-filings count once. Excess return = trade return minus SPY return over the same window.
HORIZONTRADESWIN RATEINSIDER RETURNSPY RETURNMEAN EXCESSMEDIAN EXCESST-STAT
7d4+75.00%-1.23%+0.39%-1.62%-1.94%
14d4+75.00%-2.84%+0.28%-3.12%-2.66%
30d4+50.00%-2.93%-6.08%-4.00%-4.00%
60d4+100.00%-3.77%+3.36%-7.12%-6.95%
90d4(2 pending)+100.00%-3.05%
180d4(4 pending)
1y4(4 pending)
2y4(4 pending)
How to read this: Insider Returnis the average raw return of the filer's trades over the horizon. SPY Return is what SPY did over those same windows — reference only, not a comparison. The headline alpha number is Mean Excess = Insider − SPY; green means the filer beat SPY, red means they trailed it. Win rate is the share of individual trades where the filer beat SPY. T-statvalues above 2 mean the alpha is unlikely to be chance given the sample size. "Pending" counts trades where the horizon hasn't elapsed yet; their stats are not included in the row average.
Holdings over time
AMT · 29,461 shares · as of Apr 29, 2026
09,48118,96328,44437,925202420252026SHARES HELD
Trading cadence · quarterly flow
BUY SELL
2023
2023
2023
2023
2024
2024
2024
2024
2025
2025
2025
2025
2026
2026
FLOW · 5 buys / 14 sellsCOVERAGE · 14 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
AMT
AMERICAN TOWER CORP /MA/
SALE10b5-1
10b5-1 plan
416$177.54$73.9K29,461Apr 29, 2026Apr 30, 2026View →
AMT
AMERICAN TOWER CORP /MA/
SALE10b5-1
10b5-1 plan
556$178.48$99.2K29,877Apr 28, 2026Apr 30, 2026View →
AMT
AMERICAN TOWER CORP /MA/
SALE
EVP, Chief Admin Ofr, GC & Sec
863$182.85$157.8K30,433Mar 11, 2026Mar 12, 2026View →
AMT
AMERICAN TOWER CORP /MA/
PURCHASEGRANT
Stock grant
6,87837,925Mar 10, 2026Mar 12, 2026View →
AMT
AMERICAN TOWER CORP /MA/
SALE
EVP, Chief Admin Ofr, GC & Sec
6,629$186.12$1.23M31,296Mar 10, 2026Mar 12, 2026View →
AMT
AMERICAN TOWER CORP /MA/
SALE10b5-1
10b5-1 plan
682$188.51$128.6K31,047Mar 4, 2026Mar 6, 2026View →
AMT
AMERICAN TOWER CORP /MA/
SALE10b5-1
10b5-1 plan
656$186.16$122.1K31,729Feb 27, 2026Mar 3, 2026View →
AMT
AMERICAN TOWER CORP /MA/
PURCHASEGRANT
Stock grant
11,08332,385Feb 25, 2026Feb 27, 2026View →
AMT
AMERICAN TOWER CORP /MA/
SALE
EVP, Chief Admin Ofr, GC & Sec
55$193.32$10.6K21,262Oct 1, 2025Oct 3, 2025View →
AMT
AMERICAN TOWER CORP /MA/
SALE
EVP, Chief Admin Ofr, GC & Sec
905$209.78$189.9K21,282Mar 11, 2025Mar 12, 2025View →
AMT
AMERICAN TOWER CORP /MA/
SALE
EVP, Chief Admin Ofr, GC & Sec
1,411$213.07$300.6K22,187Mar 10, 2025Mar 12, 2025View →
AMT
AMERICAN TOWER CORP /MA/
PURCHASEGRANT
Stock grant
6,00823,598Mar 10, 2025Mar 12, 2025View →
AMT
AMERICAN TOWER CORP /MA/
SALE
EVP, Chief Admin Ofr, GC & Sec
59$232.07$13.7K17,553Oct 1, 2024Oct 3, 2024View →
AMT
AMERICAN TOWER CORP /MA/
PURCHASEGRANT
Stock grant
5,80517,573Mar 11, 2024Mar 12, 2024View →
AMT
AMERICAN TOWER CORP /MA/
SALE
EVP, Chief Admin Ofr, GC & Sec
1,839$207.31$381.2K11,768Mar 10, 2024Mar 12, 2024View →
AMT
AMERICAN TOWER CORP /MA/
SALE
EVP, Chief Admin Ofr, GC & Sec
54$164.45$8.9K13,572Oct 1, 2023Mar 12, 2024View →
AMT
AMERICAN TOWER CORP /MA/
SALE
EVP, Chief Admin Ofr, GC & Sec
195$191.27$37.3K13,593Mar 11, 2023Mar 14, 2023View →
AMT
AMERICAN TOWER CORP /MA/
PURCHASEGRANT
Stock grant
4,70614,426Mar 10, 2023Mar 14, 2023View →
AMT
AMERICAN TOWER CORP /MA/
SALE
EVP, Chief Admin Ofr, GC & Sec
638$191.27$122.0K13,788Mar 10, 2023Mar 14, 2023View →
Other insiders · AMT
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About this filer
CIK 0001960785
ROLE
EVP, Chief Admin Ofr, GC & Sec
PRIMARY
AMT
COMPANIES
1
ACTIVE SINCE
Mar 2023
MARKETPEEL · /INSIDER/0001960785DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
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