Latest filingAug 27, 2026Most recent Form 4
CNC
CENTENE CORP
NYSEFinancialsHospital & Medical Service Plans
Insider activity for last month from 08/05 to 09/05. Counts use processed Form 4 rows. Purchase and sale metrics use codes P and S; totals remain unknown when any matching value is missing. Rows without a usable transaction date cannot be assigned to a rolling period and are excluded.
Total buying$00 buys
Total selling$689M2 sells
Net open-market-$689M1 insiders
Open-market mix
Buy vs sell distribution by transaction countInsider activity report
Monthly open-market purchase and sale counts Buys Sells
Transaction codes
By Form 4 transaction code in selected period2transactions
- S · Open-market sells · dominant2 · 100%
Activity by reported role
A joint filing can contribute to multiple roles4transactions
- GC · dominant2 · 50%
- SECY2 · 50%
Distinct insiders active
Reporting-owner CIKs by month · peak Aug 2026 (1)Aug 2026Sep 2026
Reported Holdings After
Separated by insider, security, and ownership typeKoster ChristopherCommon Stock · Direct
248,853.991Aug 26, 2026
These are reported post-transaction holdings, not company-wide ownership percentages. Securities, indirect vehicles, and amendments are kept separate.
Filing activity heatmap
Each cell is one day · intensity = transactions · buys green, sells redAug 05 → Sep 05
LessMore
Top insiders
By absolute net value across the selected period- KC-$3.1M
Recent filing activity
Most recent 1 transactions · color = transaction code- SSell08/19-$311MSEC
Filing detail checks
Secondary metrics for the selected periodFiling-only signals
Deterministic matches in the selected period
CNC transaction history
Filters apply within this company and selected period by default| Ticker | Insider | Role | Type | Shares | Value | Code | Signals | 90d return | Filed | Trans date |
|---|---|---|---|---|---|---|---|---|---|---|
| CNC | KOSTER CHRISTOPHER | SECYGC | sale | 47.6k | -$311M | S | +0.8% | 08/19 | 08/18 |
CENTENE CORP Insider Activity FAQ
SEC Form 4 contextWho recently reported transactions at CENTENE CORP?
KOSTER CHRISTOPHER.
When was the latest reported open-market purchase?
No code-P purchase is available for this period.
When was the latest reported open-market sale?
Koster Christopher reported a sale on Aug 26, 2026 valued at $377M. Read the SEC filing.
What is the recent purchase and sale balance?
Net open-market selling in the selected period was $6,891,182.08. Sales can occur for many non-investment reasons.
Where can I see the original SEC filing?
Every transaction row and latest-activity fact links to its original SEC filing.
What do these Form 4 transaction codes mean?
P and S generally describe open-market or private purchases and sales. A, D, F, M, X, G, J, and V describe awards, issuer dispositions, tax withholding, exercises, gifts, other transactions, and voluntary early reports; review each filing and its footnotes for context.