YD Bio (YDESW) Stock: Why It's Down Today
Updated Oct 19, 2026, 4:00 PM ET · closing price
- Closed at $0.50, -16.56% vs the prior close of $0.60.
- Volume 10.19K shares, 1019.2x its 50-day average (heavy).
- No new SEC filings since the prior session.
- No new insider buys or sales reported since the prior session.
YDESW slides 16.6% to $0.50 on 1019.2x normal volume. Closed at $0.50, -16.56% vs the prior close of $0.60. Day range $0.40–$0.50, opened at $0.44.
YDESW daily analysis — what happened
A plain-English, data-only note for every US trading day (today's note updates every 2 hours while the market is open). Newest first; older days stay archived below.
Oct 19, 2026 — YDESW slides 16.6% to $0.50 on 1019.2x normal volume
- Closed at $0.50, -16.56% vs the prior close of $0.60. Day range $0.40–$0.50, opened at $0.44.
- Volume was 10.19K shares, 1019.2x its 50-day average of 10 — unusually heavy trading.
- 52-week range $0.40–$0.60; today's close sits at 49% of that range, 16.6% below the 52-week high.
YDESW bull case vs bear case (from the data)
- Insiders made 12 open-market purchases in the last 12 months.
- High volatility: average daily move of 16.6% over 20 sessions.
- Thin trading (under $2M a day on average) can mean wide bid/ask spreads.
YDESW latest news & SEC filings
Every SEC filing by or about YDESW in the last 120 days, explained in plain English. Updated daily, with a same-day refresh for new filings.
Oct 6, 2026 · Form 4 — Insider trade
Insider trade report (Form 4) — a director, officer or 10%+ owner changed their holdings
- Chang Kochi converted options/RSUs into 3,135 shares on Sep 30, 2026; now holds 10,965
Open-market purchases (P) and sales (S) are shown in colour; awards, exercises and tax withholding are routine pay-related moves. Many sales are pre-planned under 10b5-1 plans.
Oct 6, 2026 · Form 4 — Insider trade
Insider trade report (Form 4) — a director, officer or 10%+ owner changed their holdings
- Lu Shao-Ta converted options/RSUs into 3,135 shares on Sep 30, 2026; now holds 10,965
Open-market purchases (P) and sales (S) are shown in colour; awards, exercises and tax withholding are routine pay-related moves. Many sales are pre-planned under 10b5-1 plans.
Sep 16, 2026 · Form 4 — Insider trade
Insider trade report (Form 4) — a director, officer or 10%+ owner changed their holdings
- Shen Ethan Phd bought 12,700 shares at $3.85 (≈$48.90K) on Sep 14, 2026; now holds 11,258,331
Open-market purchases (P) and sales (S) are shown in colour; awards, exercises and tax withholding are routine pay-related moves. Many sales are pre-planned under 10b5-1 plans.
Sep 10, 2026 · Form 4 — Insider trade
Insider trade report (Form 4) — a director, officer or 10%+ owner changed their holdings
- Shen Ethan Phd bought 3,100 shares at $3.93 (≈$12.18K) on Sep 9, 2026
- Shen Ethan Phd bought 3,100 shares at $3.93 (≈$12.18K) on Sep 9, 2026
- Shen Ethan Phd bought 3,100 shares at $3.93 (≈$12.18K) on Sep 9, 2026
- Shen Ethan Phd bought 3,100 shares at $3.93 (≈$12.18K) on Sep 9, 2026
Open-market purchases (P) and sales (S) are shown in colour; awards, exercises and tax withholding are routine pay-related moves. Many sales are pre-planned under 10b5-1 plans.
Sep 8, 2026 · Form 4 — Insider trade
Insider trade report (Form 4) — a director, officer or 10%+ owner changed their holdings
- Shen Ethan Phd bought 18,378 shares at $3.67 (≈$67.45K) on Sep 4, 2026
- Shen Ethan Phd bought 18,378 shares at $3.67 (≈$67.45K) on Sep 4, 2026
- Shen Ethan Phd bought 18,378 shares at $3.67 (≈$67.45K) on Sep 4, 2026
- Shen Ethan Phd bought 18,378 shares at $3.67 (≈$67.45K) on Sep 4, 2026
Open-market purchases (P) and sales (S) are shown in colour; awards, exercises and tax withholding are routine pay-related moves. Many sales are pre-planned under 10b5-1 plans.
Sep 1, 2026 · Form 424B3 — Prospectus / supplement for an offering or resale
Prospectus / supplement for an offering or resale
An offering document: new shares or debt may be sold, which can increase the share count (dilution) or debt load. Size and terms are in the prospectus.
Sep 1, 2026 · Form 6-K — Report from a foreign company (6-K)
Report from a foreign company (6-K) — news it published at home
Aug 11, 2026 · Form 424B3 — Prospectus / supplement for an offering or resale
Prospectus / supplement for an offering or resale
An offering document: new shares or debt may be sold, which can increase the share count (dilution) or debt load. Size and terms are in the prospectus.
Aug 11, 2026 · Form 6-K — Report from a foreign company (6-K)
Report from a foreign company (6-K) — news it published at home
Jul 1, 2026 · Form 4 — Insider trade
Insider trade report (Form 4) — a director, officer or 10%+ owner changed their holdings
Insider holdings update with no common-stock transactions in the table (often options or derivative awards only).
Things to know before you trade YDESW
- How much it moves: over the last 20 sessions the average daily move was 16.56% (largest 16.6%). That is a volatile stock.
- Liquidity: about 5.10K shares (≈$2.55K) trade per day on average. Thin volume can mean wider bid/ask spreads.
- 52-week position: $0.50 vs a range of $0.40–$0.60 (49% of the range).
- Dividends: no cash dividends in the last 2 years.
- Splits: none in the last 2 years.
- Insider trades (Form 4, last 12 months, recent 25 shown): 12 open-market buys, 0 sales; latest: Ethan Phd Shen bought 12,700 shares on Sep 14, 2026.
- Latest filings: 6-K Sep 1, 2026; 6-K Aug 11, 2026; 6-K May 1, 2026.
- Listing: Nasdaq · industry: Services-Medical Laboratories.
YDESW market data (last 20 sessions)
| Date | Open | High | Low | Close | Volume |
|---|---|---|---|---|---|
| Oct 19, 2026 | 0.44 | 0.50 | 0.40 | 0.50 | 10.19K |
| Oct 15, 2026 | 0.60 | 0.60 | 0.60 | 0.60 | 10 |
About YD Bio
YD Bio (YDESW) is listed on the Nasdaq and classified by the SEC under “Services-Medical Laboratories”. Its business address is in TAIPEI CITY. State of incorporation: Cayman Islands. Fiscal year ends December 31. SEC CIK 2011674.
YDESW board of directors & executives
From SEC Form 3/4/5 insider filings made in the last 12 months (date = latest filing).
Directors
| Name | Role | Latest filing |
|---|---|---|
| Kochi Chang | Director | Jul 1, 2026 |
| Jerry Yin-Chia Lee | Director | Mar 30, 2026 |
| Shao-Ta Lu | Director | Jul 1, 2026 |
| Ethan Phd Shen | CEO | Sep 16, 2026 |
| Bo-Xiang Zhang | Chief Medical Officer | Mar 27, 2026 |
Executive officers
| Name | Title | Latest filing |
|---|---|---|
| Man Edmund Hen | Chief Financial Officer | Mar 26, 2026 |
| Ethan Phd Shen | CEO | Sep 16, 2026 |
| Bo-Xiang Zhang | Chief Medical Officer | Mar 27, 2026 |
Recent insider buys & sales
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| Sep 14, 2026 | Ethan Phd Shen | Buy | 12,700 | $3.85 |
| Sep 14, 2026 | Ethan Phd Shen | Buy | 12,700 | $3.85 |
| Sep 14, 2026 | Ethan Phd Shen | Buy | 12,700 | $3.85 |
| Sep 14, 2026 | Ethan Phd Shen | Buy | 12,700 | $3.85 |
| Sep 9, 2026 | Ethan Phd Shen | Buy | 3,100 | $3.93 |
| Sep 9, 2026 | Ethan Phd Shen | Buy | 3,100 | $3.93 |
| Sep 9, 2026 | Ethan Phd Shen | Buy | 3,100 | $3.93 |
| Sep 9, 2026 | Ethan Phd Shen | Buy | 3,100 | $3.93 |
| Sep 4, 2026 | Ethan Phd Shen | Buy | 18,378 | $3.67 |
| Sep 4, 2026 | Ethan Phd Shen | Buy | 18,378 | $3.67 |
| Sep 4, 2026 | Ethan Phd Shen | Buy | 18,378 | $3.67 |
| Sep 4, 2026 | Ethan Phd Shen | Buy | 18,378 | $3.67 |
YDESW financials (annual, from XBRL filings)
| Fiscal year end | Revenue | Net income | Diluted EPS | Operating cash flow |
|---|---|---|---|---|
| No annual XBRL figures available (foreign filers often report on Form 20-F). | ||||
Latest balance sheet: total assets $—, total liabilities $—, cash $—.
YDESW earnings / results-day log
| Date | Filing | Close that day |
|---|---|---|
| No 8-K earnings releases in recent filings. | ||
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Information only, not investment advice. BuyMeWhiskey is not a registered investment adviser or broker-dealer; nothing here is a recommendation to buy, sell or hold any security, and there are no price targets. Data comes from SEC EDGAR filings and public end-of-day market data and may be delayed or contain errors. Verify with the company's filings before making decisions. Prices: end-of-day data as of Oct 19, 2026, 4:00 PM ET. Filings: SEC EDGAR. Refreshed every 2 hours during US market hours.