Amprius Technologies
AMPX · NYSE
$7.58−$0.01 (−0.13%)TodayMarket closed ·
Prev close $7.59
Who owns AMPX
Largest institutional holders, from their latest 13F filings
The 5 largest institutions hold 45.6% of AMPX’s shares.
- Amprius Inc45.4%
- VantagePoint Capital Partners0.1%
- Dixon (Donald R.)0.1%
- Cui (Yi)0.0%
- Next 1 largest institutions0.0%
- All other shareholders54.4%
| Holder | Shares | % of shares |
|---|---|---|
| Amprius Inc | 65.52M | 45.39% |
| VantagePoint Capital Partners | 200.00K | 0.14% |
| Dixon (Donald R.) | 100.00K | 0.07% |
| Cui (Yi) | 25.00K | 0.02% |
| Chu (Steven) | 2.50K | 0.00% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| Vanguard Total Stock Market Index Fund | 3.82M | 2.65% |
| iShares Russell 2000 ETF | 3.57M | 2.47% |
| Jupiter Merian Global Equity Absolute Return Fund | 1.86M | 1.29% |
| Vanguard Extended Market Index Fund | 1.63M | 1.13% |
| Fidelity Small Cap Index Fund | 1.49M | 1.03% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders sold $6.32M (14 trades) of AMPX on the open market, with no buys.
| Insider | Type | Shares | Value |
|---|---|---|---|
| Stepien Thomas M | Award | 346 | — |
| Stepien Thomas M | Gift | 346 | — |
| Stepien Thomas M | Gift | 5.00K | — |
| Stepien Thomas M | Gift | 5.00K | — |
| Stepien Thomas M | Gift | 5.00K | — |
| Stepien Thomas M | Sale | 8.00K | $80.24K |
| Stepien Thomas M | Sale | 23.53K | $243.31K |
| Stefan Constantin Ionel | Sale | 29.68K | $306.93K |
| Sun Kang | Sale | 62.10K | $642.19K |
| DIXON DONALD R | Sale | 85.00K | $1.46M |
Short interest
Settled Sep 30, 2026
- Shares short
- 22.82M
- Days to cover
- 3.80
- % of shares outstanding
- 15.81%
- Average daily volume
- 6.01M
- Change since last report
- +0.6%
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