Mary Z. Luo
CIK 1611156 · COO, Chief Scientist, Chairman · last filed 2026-03-06
"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.
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Disclosed Exposure
$194.26M
Companies
1
Total Filings
26
Lifetime Open-Market Net
-$46.15M
Holdings By Company
Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| AMPH | COO, Chief Scientist, Chairman | 9,669,569 | $20.09 | $194.26M | -$46.15M | 26 | 2026-03-06 |
Recent Filings · Page 2 of 3
26 filingsForm 4 transactions across all companies, newest first.
| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2021-03-18 | AMPH | Mixed | +299,940 | -$1.26M | EDGAR |
| 2021-02-05 | AMPH | Sell (S) | −125,607 | -$2.35M | EDGAR |
| 2020-03-18 | AMPH | Mixed | +374,766 | -$876.8K | EDGAR |
| 2020-03-17 | AMPH | Tax (F) | −73,544 | -$1.04M | EDGAR |
| 2018-12-17 | AMPH | Sell (S) | −87,154 | -$1.78M | EDGAR |
| 2018-07-03 | AMPH | Mixed | +111,704 | -$1.69M | EDGAR |
| 2018-05-17 | AMPH | Buy (P) | +80,000 | $1.29M | EDGAR |
| 2018-03-20 | AMPH | Tax (F) | −134,414 | -$2.68M | EDGAR |
| 2017-11-14 | AMPH | Exer (M) | −1,012,674 | -$12.18M | EDGAR |
| 2017-03-20 | AMPH | Mixed | +381,820 | -$909.1K | EDGAR |
Codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.