MarketPeel
Insider Trading Intelligence
MC

Mark Culhane

TDC
CHIEF FINANCIAL OFFICER · TERADATA CORP /DE/ · CIK 0001407712
FILING MIX · LIFETIME61%/39%
BUYS
14
SELLS
9
TOTAL VALUE
$4.64M
COMPANIES
2
ACTIVE SINCE
Mar 2020
HOLDINGS NOW
384,654
AVG SELL PX
$33.98
TRADE KIND
SHOWING 23 / 23
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
9 backtested trades · 8 horizons · 3 pending
Forward-return performance of every backtestable P/S trade by Mark Culhane, 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
7d9+55.56%+1.38%-2.99%+4.37%+4.43%
14d9+77.78%+5.80%-0.88%+6.68%+9.81%
30d9+88.89%+14.13%+2.96%+11.18%+10.90%
60d9+66.67%+23.16%+7.58%+15.58%+9.95%
90d9+66.67%+32.63%+12.06%+20.56%+5.45%
180d9+77.78%+25.22%+17.29%+7.93%-0.75%
1y9+44.44%+40.52%+27.50%+13.01%+5.53%
2y9(3 pending)+83.33%+70.15%+35.45%+34.70%+46.25%
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
TDC · 270,107 shares · as of May 27, 2021
080,768161,535242,303323,0702021SHARES HELD
Trading cadence · quarterly flow
BUY SELL
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 · 14 buys / 9 sellsCOVERAGE · 24 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
GNSS
GENASYS INC.
PURCHASEGRANT
Stock grant
6,411114,547Oct 1, 2025Oct 3, 2025View →
GNSS
GENASYS INC.
PURCHASEGRANT
Stock grant
38,136108,136Mar 17, 2025Mar 19, 2025View →
GNSS
GENASYS INC.
PURCHASE
613$2.70$1.7K70,000Aug 19, 2024Aug 19, 2024View →
GNSS
GENASYS INC.
PURCHASE
31,800$2.67$84.9K69,387Aug 16, 2024Aug 19, 2024View →
GNSS
GENASYS INC.
PURCHASE
17,587$2.65$46.6K37,587Aug 15, 2024Aug 19, 2024View →
GNSS
GENASYS INC.
PURCHASEGRANT
Stock grant
20,00020,000Jul 10, 2024Jul 12, 2024View →
TDC
TERADATA CORP /DE/
SALE
Chief Financial Officer
3,957$48.42$191.6K270,107May 27, 2021May 28, 2021View →
TDC
TERADATA CORP /DE/
PURCHASEGRANT
Stock grant
28,334305,757Mar 1, 2021Mar 2, 2021View →
TDC
TERADATA CORP /DE/
SALE
Chief Financial Officer
9,029$40.03$361.4K277,423Mar 1, 2021Mar 1, 2021View →
TDC
TERADATA CORP /DE/
SALE
Chief Financial Officer
3,845$42.13$162.0K301,912Mar 1, 2021Mar 2, 2021View →
TDC
TERADATA CORP /DE/
SALE
Chief Financial Officer
10,443$42.13$440.0K291,469Mar 1, 2021Mar 2, 2021View →
TDC
TERADATA CORP /DE/
SALE
Chief Financial Officer
17,405$42.13$733.3K274,064Mar 1, 2021Mar 2, 2021View →
TDC
TERADATA CORP /DE/
SALE
Chief Financial Officer
6,633$41.03$272.2K286,452Feb 26, 2021Mar 1, 2021View →
TDC
TERADATA CORP /DE/
PURCHASEGRANT
Stock grant
15,662$41.03$642.6K293,085Feb 25, 2021Mar 1, 2021View →
TDC
TERADATA CORP /DE/
PURCHASEGRANT
Stock grant
93,136323,070Feb 1, 2021Feb 3, 2021View →
TDC
TERADATA CORP /DE/
SALE
Chief Financial Officer
45,647$27.82$1.27M277,423Feb 1, 2021Feb 3, 2021View →
TDC
TERADATA CORP /DE/
SALE
Chief Financial Officer
7,050$21.80$153.7K16,750Nov 25, 2020Nov 27, 2020View →
TDC
TERADATA CORP /DE/
PURCHASE
Chief Financial Officer
1,200$18.92$22.7K229,934Mar 12, 2020Mar 12, 2020View →
TDC
TERADATA CORP /DE/
PURCHASE
Chief Financial Officer
8,400$19.78$166.2K23,250Mar 11, 2020Mar 12, 2020View →
TDC
TERADATA CORP /DE/
PURCHASE
Chief Financial Officer
550$19.80$10.9K23,800Mar 11, 2020Mar 12, 2020View →
TDC
TERADATA CORP /DE/
SALE
Chief Financial Officer
3,796$20.87$79.2K228,734Mar 2, 2020Mar 3, 2020View →
TDC
TERADATA CORP /DE/
PURCHASEGRANT
Stock grant
63,186127,221Mar 1, 2020Mar 3, 2020View →
TDC
TERADATA CORP /DE/
PURCHASEGRANT
Stock grant
105,309232,530Mar 1, 2020Mar 3, 2020View →
Other insiders · TDC
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About this filer
CIK 0001407712
ROLE
Chief Financial Officer
PRIMARY
TDC
COMPANIES
2
ACTIVE SINCE
Mar 2020
MARKETPEEL · /INSIDER/0001407712DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
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