InsidersTradesSigma
Total declarations
Company
▲ Purchases (0 ops.)
▼ Sales (2 ops.)
Insider track record
ExecutiveDisclosed buys
0
Disclosed sells
2
T+90 hit rate
50%
T+90 mean return
-0.5%
Across 8 buy signals with a settled T+90 return. Return basis: close on the day after publication.
Signal history
Explore the complete record of transactions filed by KOSTER CHRISTOPHER, Directeur Juridique. Officer active across 1 company, notably CENTENE CORP. Cumulatively, 23 reports have been published. Split: 0 buy · 2 sells. Total volume traded: €1.7m. Activity tracked since 23 June 2021. The latest transaction was filed on 26 January 2026 (Attribution). Regulator: SEC (Form 4). All data is openly available.
Declarations23 total
126,925 shares0Common StockSEC:0001071739-26-000040:0
126,925 shares0Common StockSEC:0001071739-26-000040
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$66.230.0012% mcap16.3% of flowCommon StockSEC:0001071739-21-000279
5,856 shares@ US$66.230.0012% mcap8.2% of flowCommon StockSEC:0001071739-21-000279:0
1,343 shares@ US$74.870.0003% mcap4.2% of flowCommon StockSEC:0001071739-21-000258
1,343 shares@ US$74.870.0003% mcap2.1% of flowCommon StockSEC:0001071739-21-000258:0
14,300 shares@ US$70.170.0030% mcap40.7% of flowCommon StockSEC:0001071739-21-000236
14,300 shares@ US$70.170.0030% mcap20.4% of flowCommon StockSEC:0001071739-21-000236:0
13,500 shares@ US$72.209.7% of flowCommon StockSEC:0001071739-21-000159
13,500 shares@ US$72.200.0028% mcap19.4% of flowCommon StockSEC:0001071739-21-000159:0
23 of 23 declarations
About KOSTER CHRISTOPHER
Christopher Koster serves as Secretary and General Counsel at Centene Corp. In this role, he is responsible for managing the company's legal affairs and regulatory compliance. Christopher plays a key role in protecting Centene's legal interests and in developing policies that support the company's strategic objectives. His expertise in business law and regulation is essential for navigating the complex legal landscape in which the company operates.
