MarketPeel
Insider Trading Intelligence
AC

Andrew Castellaneta

OMC
SVP, CHIEF ACCOUNTING OFFICER · OMNICOM GROUP INC. · CIK 0001627493
FILING MIX · LIFETIME25%/75%
BUYS
4
SELLS
12
TOTAL VALUE
$2.69M
COMPANIES
1
ACTIVE SINCE
Jun 2019
HOLDINGS NOW
21,875
AVG SELL PX
$85.09
TRADE KIND
SHOWING 16 / 16
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
6 backtested trades · 8 horizons · 2 pendingHow are these numbers computed? →
Forward-return performance of every backtestable P/S trade by Andrew Castellaneta, 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+83.33%-1.63%-0.35%-1.28%-2.83%
14d6+50.00%-0.95%+0.15%-1.10%-0.94%
30d6+66.67%-1.58%+0.58%-2.17%-0.23%
60d6+50.00%-1.08%+4.62%-5.69%-2.60%
90d6+66.67%-1.63%+3.16%-4.79%-0.42%
180d6+66.67%-7.79%+3.64%-11.43%-15.82%
1y6+50.00%+2.64%+19.39%-16.75%-17.14%
2y6(2 pending)+75.00%-2.13%+48.19%-50.32%-62.69%
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
OMC · 21,875 shares · as of Aug 15, 2025
09,83119,66229,49239,323202020212022202320242025SHARES HELD
Trading cadence · quarterly flow
BUY SELL
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
FLOW · 4 buys / 12 sellsCOVERAGE · 26 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
OMC
OMNICOM GROUP INC.
SALE
SVP, Chief Accounting Officer
1,850$76.31$141.2K21,875Aug 15, 2025Aug 19, 2025View →
OMC
OMNICOM GROUP INC.
SALE
SVP, Chief Accounting Officer
519$105.20$54.6K23,545Oct 18, 2024Oct 22, 2024View →
OMC
OMNICOM GROUP INC.
SALE
SVP, Chief Accounting Officer
3,481$105.30$366.6K24,064Oct 18, 2024Oct 22, 2024View →
OMC
OMNICOM GROUP INC.
SALE
SVP, Chief Accounting Officer
2,670$96.20$256.9K27,499Aug 15, 2024Aug 19, 2024View →
OMC
OMNICOM GROUP INC.
SALE
SVP, Chief Accounting Officer
3,100$76.57$237.4K30,214Nov 2, 2023Nov 6, 2023View →
OMC
OMNICOM GROUP INC.
SALE
SVP, Chief Accounting Officer
200$76.58$15.3K30,014Nov 2, 2023Nov 6, 2023View →
OMC
OMNICOM GROUP INC.
SALE
SVP, Chief Accounting Officer
2,639$80.06$211.3K33,255Aug 15, 2023Aug 17, 2023View →
OMC
OMNICOM GROUP INC.
PURCHASEGRANT
Stock grant
4,67535,894Jul 14, 2023Jul 20, 2023View →
OMC
OMNICOM GROUP INC.
SALE
SVP, Chief Accounting Officer
6,000$92.80$556.8K31,121Feb 10, 2023Feb 14, 2023View →
OMC
OMNICOM GROUP INC.
SALE
SVP, Chief Accounting Officer
2,322$72.25$167.8K37,001Aug 15, 2022Aug 17, 2022View →
OMC
OMNICOM GROUP INC.
PURCHASEGRANT
Stock grant
7,07539,323Jun 30, 2022Jul 22, 2022View →
OMC
OMNICOM GROUP INC.
SALE
SVP, Chief Accounting Officer
5,000$85.47$427.4K32,131Feb 11, 2022Feb 15, 2022View →
OMC
OMNICOM GROUP INC.
SALE
SVP, Chief Accounting Officer
2,098$75.45$158.3K37,014Aug 15, 2021Aug 17, 2021View →
OMC
OMNICOM GROUP INC.
PURCHASEGRANT
Stock grant
5,62539,084Jun 30, 2021Jul 2, 2021View →
OMC
OMNICOM GROUP INC.
SALE
SVP, Chief Accounting Officer
1,687$54.85$92.5K33,245Aug 15, 2020Aug 18, 2020View →
OMC
OMNICOM GROUP INC.
PURCHASEGRANT
Stock grant
8,24034,898Jun 30, 2019Jul 2, 2020View →
Other insiders · OMC
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About this filer
CIK 0001627493
ROLE
SVP, Chief Accounting Officer
PRIMARY
OMC
COMPANIES
1
ACTIVE SINCE
Jun 2019
MARKETPEEL · /INSIDER/0001627493DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
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