Summary
Updated Aug 31, 2026
Yao-Chung Chiang is Director of Ainos, Inc. (AIMD). 8 SEC Form 4 filings on record going back to 2025, most recently on 9 June 2026. Most recent open-market trade: bought $7K of AIMD on 9 June 2026. Lifetime open-market purchases: $21K. Historical track record: 4/5 stars across 6 tracked purchases.
Recent Transactions
10Every recent SEC Form 4 transaction Yao-Chung Chiang has reported, most recent first.
Track Record
InsiderAlpha computes a forward-return-based score for every insider with enough Form 4 purchase history. The metrics below reflect realized performance after each tracked open-market purchase.
| Metric | Value |
|---|---|
| InsiderAlpha rating | ★★★★☆ (4/5) |
| Total purchases tracked | 6 |
| Purchases with forward-return data | 6 |
| 30-day win rate | 83% |
| 90-day win rate | 0% |
| Avg 5-day return | +30.78% |
| Avg 30-day return | +18.29% |
| Avg 90-day return | -21.73% |
| Best 30-day return | +38.37% |
Trading Pattern
InsiderAlpha's records for Yao-Chung Chiang go back to 2025: 8 primary Form 4 filings, an average of 4.0 per year. The typical open-market purchase is $2K (9 buys totaling $21K). The largest single buy on record is $7K of AIMD in 2026. No transaction on record carries a Rule 10b5-1 flag - the filings look discretionary rather than pre-scheduled, which makes their timing more informative as a signal.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies Yao-Chung Chiang files at. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
- Taiwan Carbon Nano Technology Corp - $241K of AIMD open-market activity in the last 12 months
- Ting-Chuan Lee - $238K of AIMD open-market activity in the last 12 months
- Chun-Jung Tsai - $54K of AIMD open-market activity in the last 12 months
- ASE Test, Inc. - of AIMD open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Frequently Asked Questions
Who is Yao-Chung Chiang?
Yao-Chung Chiang is a corporate insider, tracked as Director of Ainos, Inc. (AIMD). InsiderAlpha holds 8 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has Yao-Chung Chiang submitted recently?
2 primary Form 4 filings in the last 90 days, covering 1 company.
Has Yao-Chung Chiang been buying or selling stock?
Recorded transactions: 9 open-market purchases ($21K) and 0 open-market sales across all tracked filings.
How accurate is Yao-Chung Chiang's historical track record?
Across 6 tracked purchases, Yao-Chung Chiang averaged +18.3% avg 30-day return with a 83% 30-day win rate. InsiderAlpha rates the track record at 4/5 stars.
Where can I see all of Yao-Chung Chiang's SEC filings?
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
Learn More
Follow Yao-Chung Chiang and every insider like them
A free account opens the full scored daily plan and every past day, a watchlist for any ticker, and 3 months of price history on every company page. No card.
Free plan available · Paid plans start with a 7-day free trial