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CHRISTOPHER KOSTER

CIK 1802501 · Secretary & General Counsel · last filed 2026-08-27

CHRISTOPHER KOSTER is a Secretary & General Counsel who has filed 30 SEC Form 4 insider transactions across 2 companies since 2020. The most recent filing shows the insider sold $3.8M of CNC on Aug 27, 2026. Across all open-market trades the lifetime net is −$7.9M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $16.7M across reported positions.

"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.

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Disclosed Exposure

$16.69M

Companies

2

Total Filings

30

Lifetime Open-Market Net

-$7.89M

Filer Profile

Reported Address
7700 FORSYTH BOULEVARD
ST. LOUIS, MO 63105
Profile details as reported on the filer's SEC submissions — for individual insiders the address is often in care of the issuer. Related filers are identified from jointly filed SEC submissions and shared reported addresses. View filings on SEC EDGAR.

Holdings By Company

Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
Symbol Role Shares Price Disclosed Exposure Lifetime OM Net Filings Latest Filed
CNC Secretary & General Counsel 248,953 $67.04 $16.69M -$6.89M 2 2026-08-27
CNTE Secretary & General Counsel 352,935 — — -$1.00M 26 2026-03-17

Recent Filings

30 filings
Insider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
Filed Symbol Action Net Shares Net $ Link
2026-08-27 CNC Sell (S) −56,500 -$3.78M EDGAR
2026-08-26 CNC Notice (144) −56,500 -$3.78M EDGAR
2026-08-19 CNC Sell (S) −47,603 -$3.11M EDGAR
2026-08-18 CNC Notice (144) −47,603 -$3.11M EDGAR
2026-03-17 CNTE Tax (F) −9,087 -$313.0K EDGAR
2026-02-06 CNTE Grant (A) +126,925 $0 EDGAR
2026-01-28 CNTE Grant (A) +126,925 $0 EDGAR
2025-03-18 CNTE Mixed +81,886 -$235.0K EDGAR
2025-02-06 CNTE Mixed −14,513 -$249.7K EDGAR
2024-12-17 CNTE Tax (F) −2,518 -$149.6K EDGAR
Showing 1–10 of 30
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Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.