| Insider | Role | Shares | Value | Buys | Sells |
|---|---|---|---|---|---|
| Date | Ticker | Insider | Role | Type | Shares | Price | Value | Chg% | SEC |
|---|---|---|---|---|---|---|---|---|---|
| Insider | Role | Shares | Value | Buys | Sells |
|---|---|---|---|---|---|
| Date | Ticker | Insider | Role | Type | Shares | Price | Value | Chg% | SEC |
|---|---|---|---|---|---|---|---|---|---|
Chief Financial Officer | CFO
2 companies
Sandra Wallach last filed a Form 4 in August 2025, as Chief Financial Officer at AMPX. The filings on record cover 2 companies. Sandra Wallach's net worth is not public. Form 4 filings only show shares in the companies where this person was an insider, as of the last filing.
Our model assigns Sandra Wallach a below-average insider score of 25/100, based on 7 past trades. Over a 12-month horizon, none of those trades were profitable, with an average 12-month return of -86.7%.
At the last filing, the largest reported position was 1,005,275 shares of AMPX. The AMPX filings lean toward selling, a net 127,685 shares.
Sandra Wallach has 45 Form 4 filings on record from March 2017 to August 2025, across 2 companies: Chief Financial Officer at Amprius Technologies (AMPX), 2022–2025; CFO at Identiv (INVE), 2017–2021.
The 56 reported transactions were 35 tax withholdings, 12 stock awards, 7 open-market sales and 2 option or other derivative awards.
Counted by filing, the open-market trades come to no purchases and 6 sales worth about $395K.
The largest open-market sale was 28,390 shares of AMPX at an average $6.82 on August 21, 2025, about $194K. Twelve months later AMPX was up 52%.
None of the 6 sales since April 2023 was marked as made under a Rule 10b5-1 trading plan.
Shares as reported in the last Form 4 for each company; the most recent is from August 2025. Values use today's prices. Any trades after the last filing were not reported, so current holdings may differ.
| Date | Ticker | Role | Type | Shares | Price | Value | Chg% | 3M | 12M | SEC |
|---|---|---|---|---|---|---|---|---|---|---|
| Aug 21, 2025 | AMPX Amprius Technologies, Inc. | Chief Financial Officer | Sell | 28,390 | $6.82 | $193,511.92 | -2.7% | +59.2% | +52.3% | |
| May 21, 2025 | AMPX Amprius Technologies, Inc. | Chief Financial Officer | Sell | 27,595 | $2.43 | $67,111.04 | -2.6% | +178.5% | +532.2% | |
| Feb 21, 2025 | AMPX Amprius Technologies, Inc. | Chief Financial Officer | Sell | 18,142 | $3.13 | $56,842.51 | -2.6% | -16.0% | +217.3% | |
| Nov 21, 2024 | AMPX Amprius Technologies, Inc. | Chief Financial Officer | Sell | 17,158 | $1.96 | $33,708.61 | -2.4% | +69.7% | +410.6% | |
| Aug 21, 2024 | AMPX Amprius Technologies, Inc. | Chief Financial Officer | Sell | 17,606 | $1.04 | $18,310.24 | -2.4% | +91.7% | +528.7% | |
| May 22, 2024 | AMPX Amprius Technologies, Inc. | Chief Financial Officer | Sell | 18,794 | $1.34 | $25,185.07 | -2.5% | -26.7% | +72.6% |