KOSTER CHRISTOPHER
SEC CIK 1802501 · EDGAR
BoughtSold
Companies
| Ticker | Company | Title | Holding | Bought | Sold | Trades | First | Last |
|---|---|---|---|---|---|---|---|---|
| CNC | Centene Corporation | SVP, GC, Secr | 248.9K | — | $7.89M | 27 | 2021-10-28 | 2026-08-26 |
Most active insiders at CNC, 12 months
| # | Insider | Title | Bought | Sold |
|---|---|---|---|---|
| 1 | Burdick Kenneth A | Dir | — | $7.74M |
| 2 | KOSTER CHRISTOPHER | GC, Sec | — | $6.89M |
| 3 | PIENKOS THEODORE J | CAO, Corp. Ctrl | — | — |
| 4 | MCNALLY TANYA M | CHRO | — | — |
| 5 | SMITH SUSAN RAYE | COO | — | — |
| 6 | CASSO KATIE | CAO, Corp. Ctrl | — | — |
| 7 | LONDON SARAH | CEO, Dir | — | — |
| 8 | Tyler Lauren M | Dir | — | — |
| 9 | TANJI KENNETH | Dir | — | — |
| 10 | Samuels Theodore R. II | Dir | — | — |
Transactions 27
| X | Filed | Traded | Ticker | Company | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026-08-27 16:45 | 2026-08-26 | CNC | Centene Corporation | KOSTER CHRISTOPHER | GC, Sec | S - Sale | $66.90 | -56.5K | 248.9K | -19% | -$3.78M | |
| 2026-08-19 16:45 | 2026-08-18 | CNC | Centene Corporation | KOSTER CHRISTOPHER | GC, Sec | S - Sale | $65.36 | -47.6K | 305.4K | -13% | -$3.11M | |
| 2026-03-17 | 2026-03-15 | CNC | Centene Corporation | KOSTER CHRISTOPHER | GC, Sec | F - Tax | $34.45 | -9,087 | 352.8K | -3% | -$313.0K | |
| A | 2026-02-06 | 2026-01-26 | CNC | Centene Corporation | KOSTER CHRISTOPHER | GC, Sec | A - Grant | $0.00 | +126.9K | 361.9K | +54% | $0 |
| 2026-01-28 | 2026-01-26 | CNC | Centene Corporation | KOSTER CHRISTOPHER | GC, Sec | A - Grant | $0.00 | +126.9K | 388.9K | +48% | $0 | |
| 2025-03-18 | 2025-03-15 | CNC | Centene Corporation | KOSTER CHRISTOPHER | GC, Sec | F - Tax | $58.19 | -4,039 | 175.8K | -2% | -$235.0K | |
| 2025-03-18 | 2025-03-15 | CNC | Centene Corporation | KOSTER CHRISTOPHER | GC, Sec | A - Grant | $0.00 | +85.9K | 261.7K | +49% | $0 | |
| 2025-02-06 | 2025-02-04 | CNC | Centene Corporation | KOSTER CHRISTOPHER | GC, Sec | D - Sale to Iss | $0.00 | -10.7K | 183.6K | -5% | $0 | |
| 2025-02-06 | 2025-02-04 | CNC | Centene Corporation | KOSTER CHRISTOPHER | GC, Sec | F - Tax | $64.82 | -3,852 | 179.8K | -2% | -$249.7K | |
| 2024-12-17 | 2024-12-15 | CNC | Centene Corporation | KOSTER CHRISTOPHER | GC, Sec | F - Tax | $59.42 | -2,518 | 194.3K | -1% | -$149.6K | |
| 2024-06-24 | 2024-06-23 | CNC | Centene Corporation | KOSTER CHRISTOPHER | GC, Sec | F - Tax | $67.93 | -1,987 | 196.7K | -1.0% | -$135.0K | |
| 2024-03-19 | 2024-03-15 | CNC | Centene Corporation | KOSTER CHRISTOPHER | GC, Sec | F - Tax | $76.05 | -2,135 | 161.5K | -1% | -$162.4K | |
| 2024-03-19 | 2024-03-15 | CNC | Centene Corporation | KOSTER CHRISTOPHER | GC, Sec | A - Grant | $0.00 | +37.1K | 198.7K | +23% | $0 | |
| 2024-02-08 | 2024-02-06 | CNC | Centene Corporation | KOSTER CHRISTOPHER | EVP, GC, Secr | A - Grant | $0.00 | +6,336 | 177.1K | +4% | $0 | |
| 2024-02-08 | 2024-02-06 | CNC | Centene Corporation | KOSTER CHRISTOPHER | EVP, GC, Secr | F - Tax | $74.07 | -13.4K | 163.7K | -8% | -$996.2K | |
| 2023-12-19 | 2023-12-15 | CNC | Centene Corporation | KOSTER CHRISTOPHER | EVP, GC, Secr | F - Tax | $75.51 | -4,889 | 170.8K | -3% | -$369.2K | |
| 2023-06-27 | 2023-06-23 | CNC | Centene Corporation | KOSTER CHRISTOPHER | EVP, GC, Secr | F - Tax | $66.80 | -1,994 | 175.5K | -1% | -$133.2K | |
| 2023-03-17 | 2023-03-15 | CNC | Centene Corporation | KOSTER CHRISTOPHER | EVP, GC, Secr | A - Grant | $63.34 | +41.4K | 177.5K | +30% | +$2.63M | |
| 2023-02-09 | 2023-02-07 | CNC | Centene Corporation | KOSTER CHRISTOPHER | EVP, GC, Secr | F - Tax | $71.01 | -6,175 | 136.1K | -4% | -$438.5K | |
| 2023-02-09 | 2023-02-07 | CNC | Centene Corporation | KOSTER CHRISTOPHER | EVP, GC, Secr | A - Grant | $0.00 | +324 | 142.2K | +0.2% | $0 | |
| 2022-12-19 | 2022-12-15 | CNC | Centene Corporation | KOSTER CHRISTOPHER | EVP, GC, Secr | F - Tax | $83.00 | -4,928 | 141.9K | -3% | -$409.0K | |
| 2022-12-13 | 2022-12-10 | CNC | Centene Corporation | KOSTER CHRISTOPHER | EVP, GC, Secr | F - Tax | $86.25 | -1,340 | 146.8K | -0.9% | -$115.6K | |
| 2022-06-27 | 2022-06-23 | CNC | Centene Corporation | KOSTER CHRISTOPHER | EVP, GC, Secr | F - Tax | $81.87 | -2,010 | 148.1K | -1% | -$164.6K | |
| DM | 2021-12-17 | 2021-12-15 | CNC | Centene Corporation | KOSTER CHRISTOPHER | EVP, GC, Secr | A - Grant | $79.68 | +42.2K | 150.0K | +39% | +$3.36M |
| D | 2021-12-17 | 2021-12-15 | CNC | Centene Corporation | KOSTER CHRISTOPHER | EVP, GC, Secr | F - Tax | $81.85 | -10.4K | 113.7K | -8% | -$849.4K |
| M | 2021-12-14 | 2021-12-10+ | CNC | Centene Corporation | KOSTER CHRISTOPHER | SVP, GC, Secr | F - Tax | $76.55 | -2,537 | 118.2K | -2% | -$194.2K |
| 2021-11-01 | 2021-10-28 | CNC | Centene Corporation | KOSTER CHRISTOPHER | SVP, GC, Secr | S - Sale | $70.17 | -14.3K | 120.8K | -11% | -$1.00M |
Purchase Sale Sale after option exercise All abbreviations