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CK

Christopher Koster

CNC
EVP, SECR. & GENERAL COUNSEL · CENTENE CORP · CIK 0001802501
FILING MIX · LIFETIME39%/61%
BUYS
16
SELLS
25
TOTAL VALUE
$20.27M
COMPANIES
1
ACTIVE SINCE
Feb 2020
HOLDINGS NOW
305,354
AVG SELL PX
$67.14
TRADE KIND
SHOWING 41 / 41
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
1 backtested trades · 8 horizonsHow are these numbers computed? →
Forward-return performance of every backtestable P/S trade by Christopher Koster, 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
7d1+0.00%+3.02%+1.87%+1.14%+1.14%—
14d1+0.00%+5.14%+1.19%+3.95%+3.95%—
30d1+0.00%+3.20%+0.14%+3.06%+3.06%—
60d1+0.00%+17.82%+4.50%+13.32%+13.32%—
90d1+0.00%+5.21%-5.11%+10.32%+10.32%—
180d1+0.00%+14.34%-8.61%+22.95%+22.95%—
1y1+0.00%+19.82%-13.83%+33.65%+33.65%—
2y1+100.00%-5.77%-7.60%+1.83%+1.83%—
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
CNC · 305,353.991 shares · as of Aug 18, 2026
097,215194,431291,646388,862202120222023202420252026SHARES 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
2026
2026
2026
FLOW · 16 buys / 25 sellsCOVERAGE · 27 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
CNC
CENTENE CORP
SALE
Secretary & General Counsel
47,603$65.36$3.11M305,353.991Aug 18, 2026Aug 19, 2026 ↗View →
CNC
CENTENE CORP
SALE
Secretary & General Counsel
9,087$34.45$313.0K352,835.617Mar 15, 2026Mar 17, 2026 ↗View →
CNC
CENTENE CORP
PURCHASEGRANT
Stock grant
126,925——388,861.617Jan 26, 2026Jan 28, 2026 ↗View →
CNC
CENTENE CORP
PURCHASEGRANT
Stock grant
126,925——361,922.617Jan 26, 2026Feb 6, 2026 ↗View →
CNC
CENTENE CORP
PURCHASEGRANT
Stock grant
85,925——261,707.084Mar 15, 2025Mar 18, 2025 ↗View →
CNC
CENTENE CORP
SALE
Secretary & General Counsel
4,039$58.19$235.0K175,782.084Mar 15, 2025Mar 18, 2025 ↗View →
CNC
CENTENE CORP
SALE
Secretary & General Counsel
10,661——183,629.644Feb 4, 2025Feb 6, 2025 ↗View →
CNC
CENTENE CORP
SALE
Secretary & General Counsel
3,852$64.82$249.7K179,821.084Feb 4, 2025Feb 6, 2025 ↗View →
CNC
CENTENE CORP
SALE
Secretary & General Counsel
2,518$59.42$149.6K194,290.644Dec 15, 2024Dec 17, 2024 ↗View →
CNC
CENTENE CORP
SALE
Secretary & General Counsel
1,987$67.93$135.0K196,733.995Jun 23, 2024Jun 24, 2024 ↗View →
CNC
CENTENE CORP
PURCHASEGRANT
Stock grant
37,147——198,687.463Mar 15, 2024Mar 19, 2024 ↗View →
CNC
CENTENE CORP
SALE
Secretary & General Counsel
2,135$76.05$162.4K161,540.463Mar 15, 2024Mar 19, 2024 ↗View →
CNC
CENTENE CORP
PURCHASEGRANT
Stock grant
6,336——177,089.002Feb 6, 2024Feb 8, 2024 ↗View →
CNC
CENTENE CORP
SALE
EVP, Secr. & General Counsel
13,449$74.07$996.2K163,675.463Feb 6, 2024Feb 8, 2024 ↗View →
CNC
CENTENE CORP
SALE
EVP, Secr. & General Counsel
4,889$75.51$369.2K170,753.002Dec 15, 2023Dec 19, 2023 ↗View →
CNC
CENTENE CORP
SALE
EVP, Secr. & General Counsel
1,994$66.80$133.2K175,523.15Jun 23, 2023Jun 27, 2023 ↗View →
CNC
CENTENE CORP
PURCHASEGRANT
Stock grant
41,444$63.34$2.63M177,517.15Mar 15, 2023Mar 17, 2023 ↗View →
CNC
CENTENE CORP
PURCHASEGRANT
Stock grant
324——142,248.15Feb 7, 2023Feb 9, 2023 ↗View →
CNC
CENTENE CORP
SALE
EVP, Secr. & General Counsel
6,175$71.01$438.5K136,073.15Feb 7, 2023Feb 9, 2023 ↗View →
CNC
CENTENE CORP
SALE
EVP, Secr. & General Counsel
4,928$83.00$409.0K141,892.062Dec 15, 2022Dec 19, 2022 ↗View →
CNC
CENTENE CORP
SALE
EVP, Secr. & General Counsel
1,340$86.25$115.6K146,820.062Dec 10, 2022Dec 13, 2022 ↗View →
CNC
CENTENE CORP
SALE
EVP, Secr. & General Counsel
2,010$81.87$164.6K148,095.139Jun 23, 2022Jun 27, 2022 ↗View →
CNC
CENTENE CORP
PURCHASEGRANT
Stock grant
5,856$66.23$387.8K124,072.945Dec 15, 2021Dec 17, 2021 ↗View →
CNC
CENTENE CORP
PURCHASEGRANT
Stock grant
15,690——15,690Dec 15, 2021Dec 17, 2021 ↗View →
CNC
CENTENE CORP
PURCHASEGRANT
Stock grant
36,347$81.85$2.98M150,041.945Dec 15, 2021Dec 17, 2021 ↗View →
CNC
CENTENE CORP
SALE
EVP, Secr. & General Counsel
10,378$81.85$849.4K113,694.945Dec 15, 2021Dec 17, 2021 ↗View →
CNC
CENTENE CORP
SALE
SVP, Secr. & General Counsel
1,194$78.45$93.7K118,216.945Dec 11, 2021Dec 14, 2021 ↗View →
CNC
CENTENE CORP
SALE
SVP, Secr. & General Counsel
1,343$74.87$100.6K119,410.945Dec 10, 2021Dec 14, 2021 ↗View →
CNC
CENTENE CORP
SALE
SVP, Secr. & General Counsel
14,300$70.17$1.00M120,753.945Oct 28, 2021Nov 1, 2021 ↗View →
CNC
CENTENE CORP
PURCHASEGRANT
Stock grant
13,500$72.20$974.7K134,975.628Jun 23, 2021Jun 25, 2021 ↗View →
CNC
CENTENE CORP
SALE
SVP, Secr. & General Counsel
11,188$66.00$738.4K121,475.628Apr 27, 2021Apr 28, 2021 ↗View →
CNC
CENTENE CORP
PURCHASEGRANT
Stock grant
5,746$49.85$286.4K99,929.615Dec 15, 2020Dec 17, 2020 ↗View →
CNC
CENTENE CORP
PURCHASEGRANT
Stock grant
40,000$59.73$2.39M132,578.615Dec 15, 2020Dec 17, 2020 ↗View →
CNC
CENTENE CORP
SALE
SVP, Secr. & General Counsel
7,351$59.73$439.1K92,578.615Dec 15, 2020Dec 17, 2020 ↗View →
CNC
CENTENE CORP
SALE
SVP, Secr. & General Counsel
1,063$60.71$64.5K94,183.615Dec 12, 2020Dec 14, 2020 ↗View →
CNC
CENTENE CORP
SALE
SVP, Secr. & General Counsel
1,194$61.31$73.2K95,246.615Dec 11, 2020Dec 14, 2020 ↗View →
CNC
CENTENE CORP
SALE
SVP, Secr. & General Counsel
1,343$63.45$85.2K96,440.615Dec 10, 2020Dec 14, 2020 ↗View →
CNC
CENTENE CORP
PURCHASEGRANT
Stock grant
48.302——3,015.544Mar 6, 2020Mar 9, 2020 ↗View →
CNC
CENTENE CORP
PURCHASEGRANT
Stock grant
43.886——2,967.242Feb 21, 2020Feb 21, 2020 ↗View →
CNC
CENTENE CORP
SALE
SVP, Secr. & General Counsel
2,984$67.37$201.0K97,652.796Feb 20, 2020Feb 21, 2020 ↗View →
CNC
CENTENE CORP
PURCHASEGRANT
Stock grant
44.827$64.35$2.9K2,923.356Feb 7, 2020Feb 10, 2020 ↗View →
Other insiders · CNC
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About this filer
CIK 0001802501
ROLE
EVP, Secr. & General Counsel
PRIMARY
CNC
COMPANIES
1
ACTIVE SINCE
Feb 2020
MARKETPEEL · /INSIDER/0001802501DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
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