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DG

David Y. Gan

ACM
CHIEF LEGAL OFFICER · AECOM · CIK 0001805823
FILING MIX · LIFETIME50%/50%
BUYS
18
SELLS
18
TOTAL VALUE
$9.36M
COMPANIES
1
ACTIVE SINCE
Dec 2012
HOLDINGS NOW
41,549
AVG SELL PX
$96.41
TRADE KIND
SHOWING 36 / 36
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
6 backtested trades · 8 horizons · 8 pendingHow are these numbers computed? →
Forward-return performance of every backtestable P/S trade by David Y. Gan, 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
7d6+66.67%-0.83%+0.47%-1.30%-1.26%—
14d6+100.00%-2.01%-0.87%-1.13%-0.56%—
30d6+50.00%-0.20%+0.16%-0.37%-0.47%—
60d6+100.00%-8.71%+1.48%-10.19%-10.16%—
90d6+100.00%-11.35%-4.01%-7.34%-7.42%—
180d6+33.33%-7.57%+3.55%-11.12%+2.10%—
1y6(2 pending)+100.00%-10.93%+13.28%-24.21%-23.99%—
2y6(6 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
ACM · 41,549 shares · as of Dec 17, 2025
018,10236,20454,30572,4072013201420152016201720182019202020212022202320242025SHARES HELD
Trading cadence · quarterly flow
BUY ● SELL ●
2012
2013
2013
2013
2013
2014
2014
2014
2014
2015
2015
2015
2015
2016
2016
2016
2016
2017
2017
2017
2017
2018
2018
2018
2018
2019
2019
2019
2019
2020
2020
2020
2020
2021
2021
2021
2021
2022
2022
2022
2022
2023
2023
2023
2023
2024
2024
2024
2024
2025
2025
2025
2025
FLOW · 18 buys / 18 sellsCOVERAGE · 53 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
ACM
AECOM
SALE10b5-1
10b5-1 plan
9,502$97.01$921.8K41,549Dec 17, 2025Dec 17, 2025 ↗View →
ACM
AECOM
PURCHASEGRANT
Stock grant
14,056——67,581Dec 15, 2025Dec 17, 2025 ↗View →
ACM
AECOM
SALE
CHIEF LEGAL OFFICER
10,530$97.96$1.03M57,051Dec 15, 2025Dec 17, 2025 ↗View →
ACM
AECOM
SALE
CHIEF LEGAL OFFICER
5,976——0Dec 15, 2025Dec 17, 2025 ↗View →
ACM
AECOM
SALE10b5-1
10b5-1 plan
6,000$98.85$593.1K51,051Dec 15, 2025Dec 17, 2025 ↗View →
ACM
AECOM
PURCHASE
CHIEF LEGAL OFFICER
5,976——46,991Dec 15, 2025Dec 17, 2025 ↗View →
ACM
AECOM
PURCHASEGRANT
Stock grant
6,534——53,525Dec 15, 2025Dec 17, 2025 ↗View →
ACM
AECOM
SALE10b5-1
10b5-1 plan
3,036$111.00$337.0K41,015Dec 18, 2024Dec 18, 2024 ↗View →
ACM
AECOM
SALE10b5-1
10b5-1 plan
6,362$110.19$701.0K44,051Dec 17, 2024Dec 18, 2024 ↗View →
ACM
AECOM
SALE10b5-1
10b5-1 plan
3,951$111.05$438.8K57,962Dec 16, 2024Dec 18, 2024 ↗View →
ACM
AECOM
SALE10b5-1
10b5-1 plan
7,549$111.67$843.0K50,413Dec 16, 2024Dec 18, 2024 ↗View →
ACM
AECOM
SALE
CHIEF LEGAL OFFICER
6,426——0Dec 15, 2024Dec 18, 2024 ↗View →
ACM
AECOM
PURCHASE
CHIEF LEGAL OFFICER
6,426——53,560Dec 15, 2024Dec 18, 2024 ↗View →
ACM
AECOM
SALE
CHIEF LEGAL OFFICER
10,494$111.51$1.17M61,913Dec 15, 2024Dec 18, 2024 ↗View →
ACM
AECOM
PURCHASEGRANT
Stock grant
13,466——72,407Dec 15, 2024Dec 18, 2024 ↗View →
ACM
AECOM
PURCHASEGRANT
Stock grant
5,381——58,941Dec 15, 2024Dec 18, 2024 ↗View →
ACM
AECOM
SALE
CHIEF LEGAL OFFICER
9,190——0Dec 15, 2023Dec 18, 2023 ↗View →
ACM
AECOM
PURCHASEGRANT
Stock grant
23,463——64,000Dec 15, 2023Dec 18, 2023 ↗View →
ACM
AECOM
SALE
CHIEF LEGAL OFFICER
16,866$92.28$1.56M47,134Dec 15, 2023Dec 18, 2023 ↗View →
ACM
AECOM
PURCHASE
CHIEF LEGAL OFFICER
9,190——34,468Dec 15, 2023Dec 18, 2023 ↗View →
ACM
AECOM
PURCHASEGRANT
Stock grant
6,069——40,537Dec 15, 2023Dec 18, 2023 ↗View →
ACM
AECOM
PURCHASEGRANT
Stock grant
19,508——38,713Dec 16, 2022Dec 19, 2022 ↗View →
ACM
AECOM
PURCHASE
CHIEF LEGAL OFFICER
6,503——19,205Dec 16, 2022Dec 19, 2022 ↗View →
ACM
AECOM
SALE
CHIEF LEGAL OFFICER
6,503——0Dec 16, 2022Dec 19, 2022 ↗View →
ACM
AECOM
SALE
CHIEF LEGAL OFFICER
13,435$82.77$1.11M25,278Dec 16, 2022Dec 19, 2022 ↗View →
ACM
AECOM
PURCHASEGRANT
Stock grant
5,976——5,976Dec 15, 2022Dec 19, 2022 ↗View →
ACM
AECOM
SALE
Chief Legal Officer
5,455——0Dec 17, 2021Dec 21, 2021 ↗View →
ACM
AECOM
PURCHASEGRANT
Stock grant
10,910——20,817Dec 17, 2021Dec 21, 2021 ↗View →
ACM
AECOM
PURCHASE
Chief Legal Officer
5,455——9,907Dec 17, 2021Dec 21, 2021 ↗View →
ACM
AECOM
PURCHASEGRANT
Stock grant
6,426——6,426Dec 15, 2021Dec 17, 2021 ↗View →
ACM
AECOM
PURCHASEGRANT
Stock grant
2,308——4,452Dec 15, 2020Dec 17, 2020 ↗View →
ACM
AECOM
SALE
Chief Legal Officer
3,385——0Dec 15, 2020Dec 17, 2020 ↗View →
ACM
AECOM
SALE
Chief Legal Officer
1,241$47.88$59.4K2,144Dec 15, 2020Dec 17, 2020 ↗View →
ACM
AECOM
PURCHASE
Chief Legal Officer
3,385——3,385Dec 15, 2020Dec 17, 2020 ↗View →
ACM
AECOM
PURCHASEGRANT
Stock grant
9,190——9,190Dec 15, 2020Dec 17, 2020 ↗View →
ACM
AECOM
SALE
Chief Legal Officer
8,115$73.40$595.6K12,702Dec 17, 2012Dec 21, 2021 ↗View →
Other insiders · ACM
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About this filer
CIK 0001805823
ROLE
Chief Legal Officer
PRIMARY
ACM
COMPANIES
1
ACTIVE SINCE
Dec 2012
MARKETPEEL · /INSIDER/0001805823DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
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