Mary Z. Luo
CIK 1611156 · COO, Chief Scientist, Chairman · last filed 2026-03-06
Mary Z. Luo is a COO, Chief Scientist, Chairman who has filed 26 SEC Form 4 insider transactions across 1 company since 2015. The most recent filing shows the insider had shares withheld for taxes covering $327.4K of AMPH on Mar 6, 2026. Across all open-market trades the lifetime net is −$46.1M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $194.3M 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.
$194.26M
1
26
-$46.15M
Holdings By Company
| 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
26 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-03-06 | AMPH | Tax (F) | −16,402 | -$327.4K | EDGAR |
| 2025-06-16 | AMPH | Exer (M) | +400,000 | $5.21M | EDGAR |
| 2024-11-12 | AMPH | Gift (G) | −500,000 | $0 | EDGAR |
| 2024-01-11 | AMPH | Sell (S) | −262,772 | -$14.34M | EDGAR |
| 2023-03-17 | AMPH | Tax (F) | −22,474 | -$827.9K | EDGAR |
| 2023-03-08 | AMPH | Grant (A) | +231,368 | $0 | EDGAR |
| 2022-05-20 | AMPH | Sell (S) | −217,552 | -$7.40M | EDGAR |
| 2022-05-18 | AMPH | Sell (S) | −236,890 | -$8.47M | EDGAR |
| 2022-03-18 | AMPH | Tax (F) | −116,974 | -$4.00M | EDGAR |
| 2022-03-17 | AMPH | Mixed | +179,562 | -$1.36M | EDGAR |