Cao Yu

CIK 2054128 · Chief Financial Officer · last filed 2026-05-14

Cao Yu is a Chief Financial Officer who has filed 3 SEC Form 4 insider transactions across 2 companies since 2025. The most recent filing, for FIEE, was dated May 14, 2026. Across all open-market trades the lifetime net is +$2.6M, making them a net buyer over the disclosed history. Current disclosed insider exposure totals $4.9M across reported positions.

"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.

Disclosed Exposure

$4.89M

Companies

2

Total Filings

3

Lifetime Open-Market Net

$2.60M

Holdings By Company

Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.

Symbol	Role	Shares	Price	Disclosed Exposure	Lifetime OM Net	Filings	Latest Filed
FIEE	Chief Financial Officer	1,728,927	$2.83	$4.89M	$0	1	2026-05-14
FiEE, Inc. (MINM) Delisted	Chief Financial Officer	1,585,366	$3.61	$5.72M	$2.60M	2	2025-05-13

Recent Filings

3 filings

Insider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.

Filed	Symbol	Action	Net Shares	Net $	Link
2026-05-14	FIEE	Grant (A)	+143,561	$0	EDGAR
2025-05-13	FiEE, Inc. (MINM) Delisted	Buy (P)	+1,585,366	$2.60M	EDGAR
2025-04-14	FiEE, Inc. (MINM) Delisted	Buy (P)	—	$0	EDGAR

Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.