Insider · CIK 0001835160
Wen Hsuan HSIEH
Files at AMBQ (Ambiq Micro, Inc.), DM (Desktop Metal, Inc.), AMPX (Amprius Technologies, Inc.). First filing Mar 13, 2026, latest Mar 13, 2026.
In brief
Wen Hsuan HSIEH files SEC Form 4 as director at AMPX (Amprius Technologies, Inc.), and also at AMBQ (Ambiq Micro, Inc.), DM (Desktop Metal, Inc.). Since Mar 13, 2026, Wen Hsuan HSIEH has reported 0 open-market buys worth $0 and 1 open-market sell worth $7.6M, the latest filed on Mar 13, 2026.
A track record needs three past buys with six months of prices behind them; Wen Hsuan HSIEH has 0, so none is measured yet.
The newest scored trade: sold $7.6M of AMPX on Mar 12, 2026, filed Mar 13, 2026, scored 60 (notable). In the last 12 months: 0 buys worth $0 and 1 sell worth $7.6M.
Where the trades landed
Last year at the company this insider has traded most, with each buy and sell on the bar it happened.
AMPX: Amprius Technologies, Inc.
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
This insider’s open-market buys and sells, scored.
| Score | Company | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 60Notable | Amprius Technologies, Inc. | $7.6M 413,146 shares | -90% | +922% from low-2% from high |
Planned sales
Form 144 notices this insider filed before selling restricted or control stock, newest first.
| Filed | Company | Shares | Value | Sale date | Past 3 months |
|---|---|---|---|---|---|
| Mar 12, 2026 | AMPX AMPRIUS TECHNOLOGIES, INC. | 413,146 0.30% of outstanding | $7.6M | Mar 12, 2026 | none |
Transactions
Every row this insider has filed, 13 in all, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Jun 8, 2026 | AMBQ Ambiq Micro, Inc. | AGrant or award Common Stock | +4,957 | $0.00 | $0 | 4,957 | Jun 10, 2026 |
| Mar 12, 2026 | AMPX Amprius Technologies, Inc. | MOption exercise Common stock | +270,251 | $2.61 | $705k | 457,590 | Mar 13, 2026 |
| Mar 12, 2026 | AMPX Amprius Technologies, Inc. | SOpen-market sale Common stock | -282,500 | $18.55 | $5.2M | 175,090 | Mar 13, 2026 |
| Mar 12, 2026 | AMPX Amprius Technologies, Inc. | SOpen-market sale Common stock | -130,646 | $18.22 | $2.4M | 44,444 | Mar 13, 2026 |
| Mar 12, 2026 | AMPX Amprius Technologies, Inc. | MOption exercise Stock Option (right to buy)derivative | -270,251 | $2.61 | $705k | 0 | Mar 13, 2026 |
| Feb 18, 2026 | AMBQ Ambiq Micro, Inc. | MOption exercise Common Stockindirect: By: Matter Venture Partners Fund I, L.P. | +238,931 | $12.60 | $3.0M | 633,920 | Feb 20, 2026 |
| Feb 18, 2026 | AMBQ Ambiq Micro, Inc. | MOption exercise Warrant (Right to Buy)derivativeindirect: By: Matter Venture Partners Fund I, L.P. | -238,931 | $0.00 | $0 | 0 | Feb 20, 2026 |
| Jul 31, 2025 | AMBQ Ambiq Micro, Inc. | CConversion Common Stockindirect: By: Matter Venture Partners Fund I, L.P. | +394,989 | - | - | 394,989 | Jul 31, 2025 |
| Jul 31, 2025 | AMBQ Ambiq Micro, Inc. | CConversion Series G Convertible Preferred Stockderivativeindirect: By: Matter Venture Partners Fund I, L.P. | -394,989 | $0.00 | $0 | 0 | Jul 31, 2025 |
| Jun 13, 2025 | AMPX Amprius Technologies, Inc. | AGrant or award Common stock | +44,444 | $0.00 | $0 | 187,339 | Jun 17, 2025 |
| Apr 2, 2025 | DM Desktop Metal, Inc. | MOption exercise Class A Common Stock | +28,571 | - | - | 42,538 | Apr 4, 2025 |
| Apr 2, 2025 | DM Desktop Metal, Inc. | DDisposition to issuer Class A Common Stock | -42,538 | - | - | 0 | Apr 4, 2025 |
| Apr 2, 2025 | DM Desktop Metal, Inc. | MOption exercise Restricted Stock Unitsderivative | -28,571 | - | - | 0 | Apr 4, 2025 |
Questions about Wen Hsuan HSIEH
Answered from the filings on this page, as of the latest one.
Is Wen Hsuan HSIEH buying or selling?
In the last 12 months Wen Hsuan HSIEH reported 0 open-market buys worth $0 and 1 open-market sell worth $7.6M on SEC Form 4; the latest was sold $7.6M of AMPX on Mar 12, 2026. Grants, option exercises and tax withholding are not counted.
How did Wen Hsuan HSIEH's past buys perform?
Not measured yet. InsiderTell needs three past buys with six months of prices to publish a track record, and Wen Hsuan HSIEH has 0.
Where does Wen Hsuan HSIEH file Form 4?
Wen Hsuan HSIEH has filed Form 4 at AMPX (Amprius Technologies, Inc.); AMBQ (Ambiq Micro, Inc.); DM (Desktop Metal, Inc.). A Form 4 is required of officers, directors and holders of more than 10% of a share class within two business days of a trade.
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.