Over the last 12 months, Ainos insiders reported 6 buys totaling $17K and 9 sales totaling $465K across SEC Form 4 filings.
Scroll the table sideways for price, value and marks.
| Date | Insider | Type | Shares | Avg price | Value | Δ stake | Marks |
|---|---|---|---|---|---|---|---|
| Jun 5, 2026 | chiang yao-chungD | ▲ Buy | 3,500 | $2.05 | $7K | +45% | indirect |
| Jun 3, 2026 | chiang yao-chungD | ▲ Buy | 2,000 | $2.13 | $4K | +34.6% | indirect |
| May 28, 2026 | chiang yao-chungD | ▲ Buy | 250 | $2.3 | $575 | +4.5% | indirect |
| May 27, 2026 | chiang yao-chungD | ▲ Buy | 2,000 | $2 | $4K | +56.7% | indirect |
| May 26, 2026 | lee ting-chuanD | ▼ Sale | 109,988 | $1.9 | $209K | -12% | — |
| May 26, 2026 | Taiwan Carbon Nano Technology Corp10% | ▼ Sale | 41,000 | $2.36 | $97K | -4.1% | — |
| May 22, 2026 | TSAI CHUN-JUNGD | ▼ Sale | 1,082 | $1.55 | $2K | -0.2% | — |
| May 21, 2026 | lee ting-chuanD | ▼ Sale | 9,000 | $1.56 | $14K | -1% | — |
| May 5, 2026 | chiang yao-chungD | ▲ Buy | 129 | $1.7 | $219 | +18.4% | indirect |
| Apr 30, 2026 | chiang yao-chungD | ▲ Buy | 300 | $1.7 | $511 | +75% | 2 tranches · indirect |
| Jan 28, 2026 | Taiwan Carbon Nano Technology Corp10% | ▼ Sale | 46,000 | $2.17 | $100K | -4.4% | — |
| Jan 9, 2026 | Taiwan Carbon Nano Technology Corp10% | ▼ Sale | 1,281 | $1.82 | $2K | -0.1% | 2 tranches |
| Oct 6, 2025 | Taiwan Carbon Nano Technology Corp10% | ▼ Sale | 7,000 | $3.59 | $25K | -0.7% | — |
| Oct 2, 2025 | Taiwan Carbon Nano Technology Corp10% | ▼ Sale | 2,000 | $3.58 | $7K | -0.2% | — |
| Oct 1, 2025 | Taiwan Carbon Nano Technology Corp10% | ▼ Sale | 2,706 | $3.48 | $9K | -0.3% | 2 tranches |
The same Form 4 data over REST or MCP, already grouped into events with the plan flag and the dollar value read. A free key does 100 calls a day and needs no card. Prefer email? Ainos filings can reach your inbox instead.
Corporate insiders — officers, directors and 10%+ owners — must report their trades to the SEC on Form 4 within two business days. This page shows open-market activity: purchases (code P), sales (S) and dispositions back to the issuer (D). Scheduled compensation events such as stock grants and option exercises are also filed on Form 4 but carry no trading signal, so they are not shown and counts here can be lower than the raw EDGAR filing total. We group each filing's transactions into one economic event (a laddered 10b5-1 sale is one event, not 25 rows), flag pre-arranged plans and late filings, and link every event to its AI-scored article in the $AIMD feed.