Chris Siu
CIK 1389044 · CFO · last filed 2026-10-13
Chris Siu is a CFO who has filed 56 SEC Form 4 insider transactions across 3 companies since 2007. The most recent filing shows the insider had shares withheld for taxes covering $83.5K of AEHR on Oct 13, 2026. Across all open-market trades the lifetime net is −$386.7K, making them a net seller over the disclosed history. Current disclosed insider exposure totals $7.5M 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.
AEHR 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
400 KATO TERRACE
FREMONT, CA 94539
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| AEHR | CFO | 81,778 | $63.33 | $5.18M | -$229.7K | 36 | 2026-10-13 |
| UCTT | Chief Accounting Officer & SVP | 44,092 | $52.80 | $2.33M | -$163.7K | 11 | 2022-06-02 |
| TRIDENT MICROSYSTEMS INC (VIRL) Delisted | Dir of Acct/Chief Acct Officer | 23,311 | — | — | $6.8K | 6 | 2009-07-24 |
Recent Filings
56 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-10-13 | AEHR | Tax (F) | −987 | -$83.5K | EDGAR |
| 2026-10-05 | AEHR | Tax (F) | −1,164 | -$124.8K | EDGAR |
| 2026-10-01 | AEHR | Mixed | +895 | -$12.4K | EDGAR |
| 2026-09-01 | AEHR | Tax (F) | −496 | -$38.0K | EDGAR |
| 2026-07-13 | AEHR | Tax (F) | −988 | -$71.7K | EDGAR |
| 2026-07-02 | AEHR | Mixed | +8,892 | -$266.5K | EDGAR |
| 2026-06-01 | AEHR | Tax (F) | −350 | -$32.8K | EDGAR |
| 2026-05-15 | AEHR | Sell (S) | −2,070 | -$221.6K | EDGAR |
| 2026-05-14 | AEHR | Notice (144) | −2,070 | -$213.7K | EDGAR |
| 2026-04-17 | AEHR | Notice (144) | −1,000 | -$81.0K | 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.