Stone Stephen R.

Director · Officer · COSO

As of 2026-09-16, Stone Stephen R. has 8 Form 4 transactions on record across 1 company — 7 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.

Trades by company

COSO · 8 trades
2026-04-27: Withheld for tax, 5,022 sh ($129K)2026-04-27: Option exercise, 17,000 sh ($0)2026-04-27: Option exercise, 17,000 sh2026-04-27: Option exercise, 17,000 sh2026-03-09: Purchase, 200 sh ($5K)2026-02-11: Award / grant, 12,000 sh2026-02-11: Award / grant, 12,000 sh2025-07-02: Purchase, 2,200 sh ($47K)

Filing ledger

DateCompanyActionShares @ priceValueOwnership ΔOwned afterFiling
2026-03-09COSOPurchase200 @ $24.15$5K+0.2% of holding120,385Form 4
2025-07-02COSOPurchase2,200 @ $21.50$47K+1.9% of holding120,185Form 4
6 award / exercise / gift records — not counted as purchases
DateCompanyActionSharesOwned afterFiling
2026-04-27COSOWithheld for tax5,022132,363Form 4
2026-04-27COSOOption exercise17,000137,385Form 4
2026-04-27COSOOption exercise17,0000Form 4
2026-04-27COSOOption exercise17,0000Form 4
2026-02-11COSOAward / grant12,00012,000Form 4
2026-02-11COSOAward / grant12,00012,000Form 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.