Wallach Sandra
Officer · AMPX
As of 2026-09-16, Wallach Sandra has 4 Form 4 transactions on record across 1 company — 0 in the trailing 12 months.
Everything this person has disclosed to the SEC on Form 4 — across every company they file for — reconstructed from the public record. A filing history, not a tip sheet.
Reconstructed holdings
- Direct $9.1M
- Indirect $0
| AMPX | direct | 1,005,275 sh | $9.1M |
Reconstructed from this person's own Form 4 filings — the total each filing reported owning afterward, priced at the close on the as-of date shown. A filed position can lag the real one.
Direct and indirect holdings (e.g. through a trust or fund) are tagged separately, as filed.
Trades by company
Filing ledger
| Date | Company | Action | Shares @ price | Value | Ownership Δ | Owned after | Filing |
|---|---|---|---|---|---|---|---|
| 2025-08-21 | AMPX | Sale | 28,390 @ $6.82 | $194K | −2.7% of holding | 1,005,275 | Form 4 |
| 2025-05-21 | AMPX | Sale | 27,595 @ $2.43 | $67K | −2.6% of holding | 1,033,665 | Form 4 |
| 2025-02-21 | AMPX | Sale | 18,142 @ $3.13 | $57K | −2.6% of holding | 678,000 | Form 4 |
1 award / exercise / gift record — not counted as purchases
Source: SEC Form 4 filings. Each row links to its original filing.
Research tool, not investment advice — historical frequencies, not recommendations. A product of Marovel Technologies LLC. Full terms.