InsidersTradesSigma
Total declarations
Company
▲ Purchases (0 ops.)
▼ Sales (3 ops.)
Insider track record
ExecutiveDisclosed buys
0
Disclosed sells
3
Not enough buy signals with a settled T+90 horizon to measure a track record yet.
Signal history
Explore the complete record of transactions filed by Koster Christopher, Directeur Juridique. Officer active across 1 company, notably CENTENE CORP. Cumulatively, 22 reports have been published. Split: 0 buy · 3 sells. Total volume traded: €6.8m. Activity tracked since 23 June 2021. The latest transaction was filed on 26 August 2026 (Cession). Regulator: SEC (Form 4). All data is openly available.
Companies and markets linked to Koster Christopher
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Declarations22 total
56,500 shares@ US$66.90Common StockSEC:0001071739-26-000169:0
47,603 shares@ US$65.360.0097% mcap22.5% of flowCommon StockSEC:0001071739-26-000167:0
9,087 shares@ US$34.454.1% of flowCommon StockSEC:0001071739-26-000065:0
126,925 shares0Common StockSEC:0001071739-26-000040:0
126,925 shares0Common StockSEC:0001071739-26-000019:0
4,039 shares@ US$58.192.6% of flowCommon StockSEC:0001071739-25-000051:0
10,661 shares0Common StockSEC:0001071739-25-000019:0
2,518 shares@ US$59.421.7% of flowCommon StockSEC:0001071739-24-000226:0
1,987 shares@ US$67.931.5% of flowCommon StockSEC:0001071739-24-000136:0
2,135 shares@ US$76.051.8% of flowCommon StockSEC:0001071739-24-000060:0
6,336 shares0Common StockSEC:0001071739-24-000025:0
4,889 shares@ US$75.514.0% of flowCommon StockSEC:0001071739-23-000223:0
1,994 shares@ US$66.801.4% of flowCommon StockSEC:0001071739-23-000164:0
41,444 shares@ US$63.3429.1% of flowCommon StockSEC:0001071739-23-000068:0
324 shares0Common StockSEC:0001071739-23-000035:0
4,928 shares@ US$83.004.6% of flowCommon StockSEC:0001071739-22-000395:0
1,340 shares@ US$86.251.3% of flowCommon StockSEC:0001071739-22-000384:0
2,010 shares@ US$81.871.9% of flowCommon StockSEC:0001071739-22-000249:0
5,856 shares@ US$66.235.2% of flowCommon StockSEC:0001071739-21-000279:0
1,343 shares@ US$74.871.4% of flowCommon StockSEC:0001071739-21-000258:0
14,300 shares@ US$70.1713.1% of flowCommon StockSEC:0001071739-21-000236:0
13,500 shares@ US$72.2012.4% of flowCommon StockSEC:0001071739-21-000159:0
22 of 22 declarations
About Koster Christopher
KOSTER CHRISTOPHER is Directeur Juridique at CENTENE CORP, where he also serves as Secretary & General Counsel. Across 20 filings in total, the 20 sampled recent filings run from 2021-06-25 to 2026-03-17, with 0 EUR of buys and 858837 EUR of sells, and the modal transaction nature is Tax withholding.
