YOON SUNG
Officer · KEYS
As of 2026-09-16, YOON SUNG has 11 Form 4 transactions on record across 1 company — 10 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 $5.3M
- Indirect $0
| KEYS | direct | 16,453 sh | $5.3M |
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
Filing ledger
| Date | Company | Action | Shares @ price | Value | Ownership Δ | Owned after | Filing |
|---|---|---|---|---|---|---|---|
| 2025-12-30 | KEYS | Sale | 889 @ $206.66 | $184K | −5.0% of holding | 16,953 | Form 4 |
10 award / exercise / gift records — not counted as purchases
| Date | Company | Action | Shares | Owned after | Filing |
|---|---|---|---|---|---|
| 2025-12-30 | KEYS | Gift | 500 | 16,453 | Form 4 |
| 2025-12-11 | KEYS | Withheld for tax | 152 | 17,842 | Form 4 |
| 2025-11-20 | KEYS | Withheld for tax | 185 | 17,994 | Form 4 |
| 2025-11-19 | KEYS | Withheld for tax | 24 | 11,750 | Form 4 |
| 2025-11-19 | KEYS | Award / grant | 6,429 | 18,179 | Form 4 |
| 2025-11-19 | KEYS | Award / grant | 507 | 11,774 | Form 4 |
| 2025-11-17 | KEYS | Withheld for tax | 38 | 11,267 | Form 4 |
| 2025-11-14 | KEYS | Withheld for tax | 65 | 11,342 | Form 4 |
| 2025-11-14 | KEYS | Withheld for tax | 37 | 11,305 | Form 4 |
| 2024-12-10 | KEYS | Withheld for tax | 81 | 11,242 | Form 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.