Centene (CNC) insider buying and selling
Every Table I transaction reported by directors and officers of S&P 500 companies on SEC Form 4 filings (2 business days to file): each row labeled with its official transaction code, nothing filtered out beforehand.
Open-market purchases (code P) are the rare signal, in green; sales (code S) are common and often pre-scheduled (10b5-1). Table II (derivatives) is not included: its prices are exercise prices, not market values. Guide: insider buying.
| Date | Ticker | Insider | Role | Shares | Price | Amount | % of stake | Type / filing |
|---|
Download these transactions as CSV No account, no sign-up. The data is public: it comes from SEC Form 4 filings.
Centene Corporation (CNC) insider buying and selling: no purchases, 5 sales
56 Form 4 Table I transactions filed with the SEC by Centene Corporation insiders between 2025-10-01 and 2026-10-15 (15-month history): 0 open-market purchases and 5 sales, plus 51 transactions under other Form 4 codes, broken down one by one below. The largest open-market trade is a sale of $5.2M by Burdick Kenneth A on 2026-06-10.
Centene insider buying and selling over the last 12 months
Between Oct 21, 2025 and Oct 20, 2026, Centene insiders filed 5 sales worth $14.6M on the open market, and no purchases.
The biggest seller was Burdick Kenneth A (Director): $7.7M in 3 sales, out of 2 different sellers.
The largest trade of the period was a sale of $5.2M on Jun 10, 2026, by Burdick Kenneth A (Director). Form 4 on sec.gov (0001071739-26-000127).
None of the 5 sales carries the 10b5-1 plan flag on the Form 4 (sales scheduled months ahead).
The last three months show 2 sales, against 1 in the three before. The latest sale from Aug 26, 2026.
Against its sector (Healthcare, 59 companies with an insider page on this site), over the same dates the median is 9 sales and 0 purchases on the open market. Centene has more sales than 18 of the other 58, ranks 31 of 59 by net dollars sold, and 19 of the 59 have at least one purchase.
The 20 most important trades
With no open-market purchases, the table starts with CNC's sales, largest first. The full history is in the tool above, already searched.
See all 56 CNC trades in the full history →
| Trade date | Filed | Insider | Role | Amount | Code | Filing |
|---|---|---|---|---|---|---|
| 2026-06-10 | 2026-06-11 | Burdick Kenneth A | Director | $5.2M | S — Open-market sale2 Form 4 footnotesF1 The weighted average price for this transaction is reported within the form. Shares were sold at prices ranging from $64.55 to $64.61. Full information regarding the number of shares at each price is available upon request. F2 Ownership includes 3,992 shares of restricted stock units subject to vesting requirements. | SEC |
| 2026-08-26 | 2026-08-27 | Koster Christopher | Secretary & General Counsel | $3.8M | S — Open-market sale2 Form 4 footnotesF1 The weighted average price for this transaction is reported within the form. Shares were sold at prices ranging from $66.90 to $66.91. Full information regarding the number of shares at each price is available upon request. F2 Ownership includes 229,874 shares of previously-granted restricted stock units and performance stock units (reported at target level performance) subject to vesting requirements. | SEC |
| 2026-08-18 | 2026-08-19 | Koster Christopher | Secretary & General Counsel | $3.1M | S — Open-market sale3 Form 4 footnotesF1 The weighted average price for this transaction is reported within the form. Shares were sold at prices ranging from $65.28 to $65.45. Full information regarding the number of shares at each price is available upon request. F2 Updated ownership includes common stock acquired through the Company's Employee Stock Purchase Program. F3 Ownership includes 229,874 shares of previously-granted restricted stock units and performance stock units (reported at target level performance) subject to vesting requirements. | SEC |
| 2025-12-03 | 2025-12-05 | Burdick Kenneth A | Director | $1.3M | S — Open-market sale2 Form 4 footnotesF1 The weighted average price for this transaction is reported within the form. Shares were sold at prices ranging from $39.00 to $39.11. Full information regarding the number of shares at each price is available upon request. F2 Ownership includes 3,579 shares of restricted stock units subject to vesting requirements. | SEC |
| 2025-12-04 | 2025-12-05 | Burdick Kenneth A | Director | $1.3M | S — Open-market saleForm 4 footnoteF2 Ownership includes 3,579 shares of restricted stock units subject to vesting requirements. | SEC |
| 2026-03-15 | 2026-03-17 | London Sarah | Chief Executive Officer | $1.2M | F — Tax withholding (shares surrendered for taxes)2 Form 4 footnotesF1 Shares withheld for taxes upon vesting of previously-reported grants of restricted stock units. F2 Ownership includes 889,753 shares of previously-granted restricted stock units and performance stock units (reported at target level performance) subject to vesting requirements. | SEC |
| 2026-03-15 | 2026-03-17 | Asher Andrew Lynn | Chief Financial Officer | $525k | F — Tax withholding (shares surrendered for taxes)2 Form 4 footnotesF1 Shares withheld for taxes upon vesting of previously-reported grants of restricted stock units. F2 Ownership includes 448,650 shares of previously-granted restricted stock units and performance stock units (reported at target level performance) subject to vesting requirements. | SEC |
| 2026-10-15 | 2026-10-15 | Carson Michael A | Group President, Medicare&Spec | $500k | F — Tax withholding (shares surrendered for taxes)2 Form 4 footnotesF1 Shares withheld for taxes upon vesting of previously-reported grant of restricted stock units. F2 Ownership includes 99,734 shares of previously-granted restricted stock units and performance stock units (reported at target level performance) subject to vesting requirements. | SEC |
| 2026-03-15 | 2026-03-17 | Koster Christopher | Secretary & General Counsel | $313k | F — Tax withholding (shares surrendered for taxes)2 Form 4 footnotesF1 Shares withheld for taxes upon vesting of previously-reported grants of restricted stock units. F2 Ownership includes 229,874 shares of previously-granted restricted stock units and performance stock units (reported at target level performance) subject to vesting requirements. | SEC |
| 2026-03-15 | 2026-03-17 | Casso Katie | Corporate Controller & CAO | $116k | F — Tax withholding (shares surrendered for taxes)2 Form 4 footnotesF1 Shares withheld for taxes upon vesting of previously-reported grants of restricted stock units. F2 Ownership includes 71,740 shares of previously-granted restricted stock units and performance stock units (reported at target level performance) subject to vesting requirements. | SEC |
| 2026-03-15 | 2026-03-17 | Smith Susan Raye | Chief Operating Officer | $101k | F — Tax withholding (shares surrendered for taxes)2 Form 4 footnotesF1 Shares withheld for taxes upon vesting of previously-reported grants of restricted stock units. F2 Ownership includes 182,815 shares of previously-granted restricted stock units and performance stock units (reported at target level performance) subject to vesting requirements. | SEC |
| 2026-03-15 | 2026-03-17 | Mcnally Tanya M | Chief People Officer | $96k | F — Tax withholding (shares surrendered for taxes)2 Form 4 footnotesF1 Shares withheld for taxes upon vesting of previously-reported grants of restricted stock units. F2 Ownership includes 114,503 shares of previously-granted restricted stock units and performance stock units (reported at target level performance) subject to vesting requirements. | SEC |
| 2026-09-15 | 2026-09-16 | Pienkos Theodore J | Corporate Controller & CAO | $76k | F — Tax withholding (shares surrendered for taxes)2 Form 4 footnotesF1 Shares withheld for taxes upon vesting of previously-reported grant of restricted stock units. F2 Ownership includes 13,763 shares of previously-granted restricted stock units and performance stock units (reported at target level performance) subject to vesting requirements. | SEC |
| 2026-04-15 | 2026-04-16 | Mcnally Tanya M | Chief People Officer | $36k | F — Tax withholding (shares surrendered for taxes)2 Form 4 footnotesF1 Shares withheld for taxes upon vesting of previously-reported grant of restricted stock units. F2 Ownership includes 112,054 shares of previously-granted restricted stock units and performance stock units (reported at target level performance) subject to vesting requirements. | SEC |
| 2026-01-15 | 2026-01-16 | Mcnally Tanya M | Chief People Officer | $33k | F — Tax withholding (shares surrendered for taxes)2 Form 4 footnotesF1 Shares withheld for taxes upon vesting of previously-reported grant of restricted stock units. F2 Ownership includes 49,340 shares of previously-granted restricted stock units and performance stock units (reported at target level performance) subject to vesting requirements. | SEC |
| 2026-06-15 | 2026-06-15 | Smith Susan Raye | Chief Operating Officer | $31k | F — Tax withholding (shares surrendered for taxes)2 Form 4 footnotesF1 Shares withheld for taxes upon vesting of previously-reported grant of restricted stock units. F2 Ownership includes 181,082 shares of previously-granted restricted stock units and performance stock units (reported at target level performance) subject to vesting requirements. | SEC |
| 2026-09-30 | 2026-09-30 | Coughlin Christopher J | Director | A — Grant or awardForm 4 footnoteF1 Ownership includes 3,992 shares of previously-granted restricted stock units subject to vesting requirements. | SEC | |
| 2026-09-30 | 2026-09-30 | Eppinger Frederick H | Director | A — Grant or awardForm 4 footnoteF1 Ownership includes 6,654 shares of previously-granted restricted stock units subject to vesting requirements. | SEC | |
| 2026-09-30 | 2026-09-30 | Samuels Theodore R. Ii | Director | A — Grant or awardForm 4 footnoteF1 Ownership includes 3,992 shares of previously-granted restricted stock units subject to vesting requirements. | SEC | |
| 2026-09-30 | 2026-09-30 | Tanji Kenneth | Director | A — Grant or awardForm 4 footnoteF1 Ownership includes 3,992 shares of previously-granted restricted stock units subject to vesting requirements. | SEC |
The period balance: money in, money out
In the Form 4 filings submitted between Oct 1, 2025 and Oct 15, 2026 there is not one open-market purchase of Centene Corporation: 5 sales worth $14.6M and zero dollars bought.
Only codes P and S count, where an insider puts in or takes out their own money. A selling balance like Centene Corporation's is the norm in the S&P 500, where much of the pay comes as stock. It is not a recommendation to buy or sell: it is what was filed.
Every transaction, code by code
| Code | What it means | Trades | Reported amount |
|---|---|---|---|
| A | Grant or award | 40 | $0 |
| F | Tax withholding (shares surrendered for taxes) | 11 | $3.1M |
| S | Open-market sale | 5 | $14.6M |
| Total | Everything filed in the period | 56 | $17.7M |
40 of the 56 rows carry no usable amount on the Form 4: they count as trades and add $0. The code labels come from the SEC index.
Who has traded
Over the 15 months of history, 18 distinct people or entities have filed Centene Corporation transactions: none bought on the open market and 2 sold. Counted by CIK, the fixed number the SEC gives each filer, and not by name, which each filer types their own way.
| Filer | Role | Transactions | Bought (count) | Sold (count) | Last filed |
|---|---|---|---|---|---|
| Burdick Kenneth A | Director | 6 | — | $7.7M (3) | 2026-06-11 |
| Koster Christopher | Secretary & General Counsel | 4 | — | $6.9M (2) | 2026-08-27 |
| Coughlin Christopher J | Director | 6 | — | — | 2026-09-30 |
| Eppinger Frederick H | Director | 6 | — | — | 2026-09-30 |
| Samuels Theodore R. Ii | Director | 6 | — | — | 2026-09-30 |
| Tanji Kenneth | Director | 6 | — | — | 2026-09-30 |
| Mcnally Tanya M | Chief People Officer | 4 | — | — | 2026-04-16 |
| Smith Susan Raye | Chief Operating Officer | 3 | — | — | 2026-06-15 |
Shown here are the 8 who moved the most money, out of 18. The rest are in the full history, one link above. The name links to all their trades, in any company. "Transactions" counts any code; the money, open market only. Role: from their latest filing.
Month by month
By the month the trade was executed, not the month it was filed; months with no trades show zero. The busiest month was Dec 2025: 0 purchases and 2 sales, worth $2.6M. 12 of the 15 months have none.
| Month | Purchases | Amount | Sales | Amount |
|---|---|---|---|---|
| Aug 2025 | 0 | $0 | 0 | $0 |
| Sep 2025 | 0 | $0 | 0 | $0 |
| Oct 2025 | 0 | $0 | 0 | $0 |
| Nov 2025 | 0 | $0 | 0 | $0 |
| Dec 2025 | 0 | $0 | 2 | $2.6M |
| Jan 2026 | 0 | $0 | 0 | $0 |
| Feb 2026 | 0 | $0 | 0 | $0 |
| Mar 2026 | 0 | $0 | 0 | $0 |
| Apr 2026 | 0 | $0 | 0 | $0 |
| May 2026 | 0 | $0 | 0 | $0 |
| Jun 2026 | 0 | $0 | 1 | $5.2M |
| Jul 2026 | 0 | $0 | 0 | $0 |
| Aug 2026 | 0 | $0 | 2 | $6.9M |
| Sep 2026 | 0 | $0 | 0 | $0 |
| Oct 2026 | 0 | $0 | 0 | $0 |
The last month may be partial: a Form 4 is filed up to two business days later. The table does not say whether the pattern is good or bad; it says when it happened.
Centene Corporation (CNC) analysis page →
Other Healthcare companies with insider trades
All 500 are listed in the section index →
Which insiders are buying their own company stock →
How to read this data
None of the 5 sales in the table is flagged as scheduled (10b5-1 plan), the kind signed months ahead and executed automatically. Centene has no open-market purchase (code P) in the history, the most common case in the S&P 500: insiders are already paid in stock. The latest filing is from Oct 15, 2026, and a Form 4 arrives up to two business days after the trade.
20 of the 20 rows in the table carry footnotes from the Form 4 itself, folded into the code column and copied verbatim; a row with no footnote means the filing has none.
Guide: Insider buying · all guides
What is behind these trades
The concepts on this page, explained from scratch in the Academy. Free, no account.
- What the efficiency hypothesis says and what it does NOT sayIf an insider's purchase is public and anyone can read it, is there any information left in it? That is the exact question that brings people here.
- Who really moves the market: the types of investorWho sits on the other side of each order, and where a company's own insiders fit among them.
- Supply, demand and price: why it rises and falls constantlyHow a piece of news ends up inside the price, and why the reaction to a filed sale is rarely the one you would expect.
Source: SEC EDGAR Form 4. This is a list of public facts, not financial advice or a recommendation to buy or sell.