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 3 of 3
26 filingsForm 4 transactions across all companies, newest first.
| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2016-02-03 | AMPH | Mixed | +32,730 | -$622.7K | EDGAR |
| 2015-12-03 | AMPH | Sell (S) | −77,166 | -$1.19M | EDGAR |
| 2015-08-19 | AMPH | Exer (M) | +33,924 | $440.0K | EDGAR |
| 2015-06-17 | AMPH | Mixed | — | -$332.8K | EDGAR |
| 2015-06-12 | AMPH | Mixed | −44,718 | -$1.89M | EDGAR |
| 2015-03-30 | AMPH | Grant (A) | +357,858 | $0 | EDGAR |
Showing 21–26 of 26
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Page 3 of 3
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.