YDES · Insider Trading

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Every open-market purchase and sale reported by YDES officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.

Form 4 Filings

most recent

Open-Market Buys

code P

Sales

code S

Reporting Insiders

current holders

YDES — Recent Form 4 Transactions (latest 2026-10-06)

Filed	Insider	Role	Type	Shares	Value
2026-10-06	Kochi Chang	Director	M	+3,135	—
2026-10-06	Shao-Ta Lu	Director	M	+3,135	—
2026-09-16	Ethan PhD Shen	CEO	Buy	+12,700	+$48.90K
2026-09-10	Ethan PhD Shen	CEO	Buy	+3,100	+$12.18K
2026-09-08	Ethan PhD Shen	CEO	Buy	+18,378	+$67.45K
2026-07-01	Kochi Chang	Director	M	+5,749	—
2026-07-01	Shao-Ta Lu	Director	M	+5,749	—

YDES — Current Insider Holders

Insider	Role	Shares Held	Value
Ethan PhD Shen	CEO	54,379,189	$233.29M
Shao-Ta Lu	Director	62,116	$266.48K
Kochi Chang	Director	10,965	$47.04K

YDES Insider Trading FAQ

Who are the insiders at YDES?

3 officers, directors and 10%+ beneficial owners currently report holdings in YDES via SEC Form 4.

Are YDES insiders buying or selling?

Across the 7 most recent Form 4 filings for YDES, 3 were open-market purchases (code P) and 0 were sales (code S). Sales frequently reflect scheduled 10b5-1 plans or tax withholding rather than a view on the stock.

How current is YDES insider data?

Form 4 must be filed within two business days of the transaction, so this is close to real time. The most recent YDES filing is dated 2026-10-06.

How to read Form 4 activity

Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.

Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.

Full filing history and per-insider positions are on the YDES quote page; the site-wide leaderboard is on the insider transactions hub.