Cao Yu is CFO at FiEE, Inc. (MINM). They have made 1 open-market trade across 1 company since 2025, most recently 2026-05-12.
CIK 0002054128
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
1 open-market purchase totalling $5.2M since 2025, never a sale. Too few scored purchases to measure a record yet.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| MINM | BUY | 2025-05-09 | 2025-05-13 | $1.64 | $5.2M | +0.0% | +7.0% | N/A |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.