Diane G. Gerst
CIK 1611283 · EVP, QA & Regulatory Affairs · last filed 2026-06-03
"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
$640.9K
Companies
1
Total Filings
36
Lifetime Open-Market Net
-$1.57M
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 | Director | 31,899 | $20.09 | $640.9K | -$1.57M | 36 | 2026-06-03 |
Recent Filings · Page 3 of 4
36 filingsForm 4 transactions across all companies, newest first.
| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2017-10-06 | AMPH | Mixed | — | -$63.7K | EDGAR |
| 2017-06-16 | AMPH | Tax (F) | −146 | -$2.4K | EDGAR |
| 2017-04-17 | AMPH | Tax (F) | −754 | -$11.2K | EDGAR |
| 2017-03-28 | AMPH | Tax (F) | −614 | -$8.4K | EDGAR |
| 2017-03-20 | AMPH | Mixed | +9,667 | -$16.4K | EDGAR |
| 2016-12-16 | AMPH | Sell (S) | −2,940 | -$60.3K | EDGAR |
| 2016-08-19 | AMPH | Mixed | — | -$167.6K | EDGAR |
| 2016-06-17 | AMPH | Tax (F) | −146 | -$2.3K | EDGAR |
| 2016-05-19 | AMPH | Sell (S) | −1,427 | -$19.9K | EDGAR |
| 2016-04-20 | AMPH | Mixed | −1,427 | -$60.5K | 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.