KOSTER CHRISTOPHER

Officer · CNC

As of 2026-09-16, KOSTER CHRISTOPHER has 9 Form 4 transactions on record across 1 company — 4 in the trailing 12 months.

Everything this person has disclosed to the SEC on Form 4 — across every company they file for — reconstructed from the public record. A filing history, not a tip sheet.

Reconstructed holdings

Direct: $16.4MIndirect: $0$16.4Mas of 2026-09-16
  • Direct $16.4M
  • Indirect $0
CNCdirect248,854 sh$16.4M

Reconstructed from this person's own Form 4 filings — the total each filing reported owning afterward, priced at the close on the as-of date shown. A filed position can lag the real one.

Direct and indirect holdings (e.g. through a trust or fund) are tagged separately, as filed.

Trades by company

CNC · 9 trades
2026-08-26: Sale, 56,500 sh ($3.8M)2026-08-18: Sale, 47,603 sh ($3.1M)2026-03-15: Withheld for tax, 9,087 sh ($313K)2026-01-26: Award / grant, 126,925 sh ($0)2025-03-15: Withheld for tax, 4,039 sh ($235K)2025-03-15: Award / grant, 85,925 sh ($0)2025-02-04: Withheld for tax, 3,852 sh ($250K)2025-02-04: Disposition, 10,661 sh ($0)2024-12-15: Withheld for tax, 2,518 sh ($150K)

Filing ledger

DateCompanyActionShares @ priceValueOwnership ΔOwned afterFiling
2026-08-26CNCSale56,500 @ $66.90$3.8M−18.5% of holding248,854Form 4
2026-08-18CNCSale47,603 @ $65.36$3.1M−13.5% of holding305,354Form 4
7 award / exercise / gift records — not counted as purchases
DateCompanyActionSharesOwned afterFiling
2026-03-15CNCWithheld for tax9,087352,836Form 4
2026-01-26CNCAward / grant126,925388,862Form 4
2025-03-15CNCWithheld for tax4,039175,782Form 4
2025-03-15CNCAward / grant85,925261,707Form 4
2025-02-04CNCWithheld for tax3,852179,821Form 4
2025-02-04CNCDisposition10,661183,630Form 4
2024-12-15CNCWithheld for tax2,518194,291Form 4

Source: SEC Form 4 filings. Each row links to its original filing.

Research tool, not investment advice — historical frequencies, not recommendations. A product of Marovel Technologies LLC. Full terms.