Chenming Hu
CIK 1316320 · last filed 2026-09-10
Chenming Hu is a corporate insider who has filed 127 SEC Form 4 insider transactions across 7 companies since 2007. The most recent filing, for AMBA, was dated Sep 10, 2026. Across all open-market trades the lifetime net is −$16.8M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $9.9M 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.
Charts
Trading activity, where the exposure sits, and each trade against the stock price.
ACMR price and trades
Daily close with each Form 4 filing on this company marked: green = open-market buy, red = open-market sale, purple = grants, exercises, gifts and other non-market transactions. Marker size scales with the dollar value.
Shares held
Shares owned after each reported transaction on this company (direct holdings as reported).
Open-market buying and selling
by monthDollar value of open-market purchases (code P, up) and sales (code S, down) across all companies, by filing month. Grants, exercises and gifts are excluded.
Exposure by company
latestMost recently reported shares × current price. Faded bars (*) have had no filing in 3 years, so the person may no longer hold them. Click a bar to chart that company.
Filer Profile
ALAMO, CA 94507
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| AMBA | Director | 32,667 | $62.76 | $2.05M | -$5.17M | 63 | 2026-09-10 |
| ACMR | Director | 100,002 | $56.09 | $5.61M | -$8.59M | 18 | 2025-03-19 |
| INPHI Corp (IPHI) Delisted | Director | 0 | $172.27 | $0 | -$199.5K | 16 | 2021-04-20 |
| FTNT | Director | 12,900 | $171.50 | $2.21M | $0 | 14 | 2020-10-01 |
| SNDK | Director | 0 | $1371.12 | $0 | -$2.88M | 10 | 2016-05-13 |
| FORM | Director | — | $110.16 | — | $0 | 2 | 2010-05-21 |
| Peraso Inc. (MOSY) Delisted | Director | — | $4.50 | — | $0 | 3 | 2009-07-24 |
Recent Filings
127 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-09-10 | AMBA | Grant (A) | +3,151 | $0 | EDGAR |
| 2025-09-04 | AMBA | Grant (A) | +2,498 | $0 | EDGAR |
| 2025-03-19 | ACMR | Sell (S) | −163,308 | -$4.90M | EDGAR |
| 2025-03-17 | ACMR | Notice (144) | −163,308 | -$4.90M | EDGAR |
| 2024-08-30 | AMBA | Grant (A) | +3,374 | $0 | EDGAR |
| 2024-08-20 | ACMR | Grant (A) | — | $0 | EDGAR |
| 2023-09-01 | AMBA | Grant (A) | +3,218 | $0 | EDGAR |
| 2023-08-21 | ACMR | Grant (A) | — | $0 | EDGAR |
| 2023-08-14 | ACMR | Grant (A) | — | $0 | EDGAR |
| 2023-06-20 | AMBA | Grant (A) | +1,559 | $0 | EDGAR |
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.