Amprius Ownership | Who Owns Amprius?
Amprius Ownership Summary
Amprius is owned by 52.17% institutional investors, 8.61% insiders, and 39.22% retail investors. Blackrock funding, inc. /de is the largest institutional shareholder, holding 6.12% of AMPX shares. Vanguard Total Stock Mkt Idx Inv is the top mutual fund, with 2.09% of its assets in Amprius shares.
AMPX Ownership Benchmark
| Type | Name | % Inst | % Insiders | % Retail |
|---|---|---|---|---|
| Stock | Amprius | 52.17% | 8.61% | 39.22% |
| Sector | Industrials Stocks | 46.76% | 12.55% | 40.69% |
| Industry | Electrical Equipment Stocks | 25.42% | 18.45% | 56.13% |
| Idea | Electric Vehicle Stocks List | 22.80% | 17.01% | 60.20% |
| Idea | EV Battery Stocks List | 13.58% | 16.65% | 69.76% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| Blackrock funding, inc. /de | 7.46M | 6.12% | $78.43M |
| Vanguard group | 7.13M | 5.63% | $56.25M |
| Driehaus capital management | 3.09M | 2.54% | $32.51M |
| Morgan stanley | 2.74M | 2.25% | $28.86M |
| Geode capital management | 2.42M | 1.99% | $25.52M |
| Invesco | 2.38M | 1.95% | $25.03M |
| State street | 2.19M | 1.80% | $23.04M |
| Deutsche bank ag\ | 2.07M | 1.70% | $21.74M |
| Ubs group | 2.10M | 1.66% | $16.56M |
| Bnp paribas arbitrage, snc | 1.94M | 1.60% | $20.45M |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| Essex investment management | 697.39K | 1.12% | $7.34M |
| Slt | 120.30K | 0.82% | $1.27M |
| Thames capital management | 526.83K | 0.79% | $5.54M |
| Cornerstone partners capital management | 30.71K | 0.67% | $242.27K |
| Eam investors | 488.53K | 0.58% | $5.08M |
| Hussman strategic advisors | 210.00K | 0.40% | $1.66M |
| Lisanti capital growth | 198.89K | 0.37% | $1.57M |
| Lexington partners | 76.76K | 0.26% | $214.94K |
| Driehaus capital management | 3.09M | 0.23% | $32.51M |
| Bayforest capital | 36.88K | 0.22% | $291.00K |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Driehaus capital management | 3.09M | 0.23% | 3.09M |
| Blackrock funding, inc. /de | 7.46M | 0.00% | 2.19M |
| Deutsche bank ag\ | 2.07M | 0.01% | 2.01M |
| Voloridge investment management | 1.88M | 0.07% | 1.88M |
| Bnp paribas arbitrage, snc | 1.94M | 0.01% | 1.78M |
Top Sellers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Renaissance | 12.40K | 0.00% | -1.33M |
| Board of trustees of the leland stanford junior university | - | - | -1.15M |
| Marshall wace, llp | 30.37K | 0.00% | -1.08M |
| Zazove associates | - | - | -969.93K |
| Jpmorgan chase | 287.72K | 0.00% | -729.50K |
New Positions
| Holder | Shares | % Assets | Change | Value |
|---|---|---|---|---|
| Driehaus capital management | 3.09M | 0.23% | 3.09M | $32.51M |
| Voloridge investment management | 1.88M | 0.07% | 1.88M | $19.74M |
| Tudor investment corp et al | 715.74K | 0.01% | 715.74K | $7.53M |
| Capitolis liquid global markets | 680.60K | 0.06% | 680.60K | $7.16M |
| Thames capital management | 526.83K | 0.79% | 526.83K | $5.54M |
Sold Out
| Holder | Change |
|---|---|
| Nelson, van denburg & campbell wealth management group | -2.00 |
| Twin peaks wealth advisors | -7.00 |
| Kestra investment management | -10.00 |
| Ifp advisors | -66.00 |
| Wealthtrak capital management | -130.00 |
Institutional Ownership Trends
| Date | Holdings | Change % | Shares | Change % | Ownership | Change % | Increased Position | Change % | Decreased Position | Change % |
|---|---|---|---|---|---|---|---|---|---|---|
| Sep 30, 2025 | 190 | 48.44% | 63,537,131 | 66.89% | 52 | 5.34% | 148 | 78.31% | 25 | 13.64% |
| Jun 30, 2025 | 125 | 16.82% | 37,991,404 | 82.87% | 31 | 10.06% | 82 | 26.15% | 22 | 37.50% |
| Mar 31, 2025 | 106 | 6.00% | 20,840,400 | 25.25% | 17 | 7.78% | 64 | -3.03% | 16 | 60.00% |
| Dec 31, 2024 | 97 | 29.33% | 16,490,472 | 99.57% | 14 | 26.67% | 63 | 65.79% | 10 | -33.33% |
| Sep 30, 2024 | 74 | 1.37% | 8,233,883 | 7.69% | 7 | 10.34% | 37 | -19.57% | 15 | 114.29% |
Top Mutual Funds Shareholders
| Holder | Shares | % Holding | Change |
|---|---|---|---|
| Vanguard Total Stock Mkt Idx Inv | 2.61M | 2.09% | -58.09K |
| iShares Russell 2000 ETF | 2.24M | 1.79% | - |
| Invesco WilderHill Clean Energy ETF | 1.13M | 0.90% | - |
| Fidelity Small Cap Index | 935.27K | 0.75% | 767.82K |
| iShares Russell 2000 Growth ETF | 826.11K | 0.66% | - |
| Vanguard US Total Market Shares ETF | 593.90K | 0.50% | - |
| Vanguard US Momentum Factor ETF | 539.86K | 0.45% | 80.60K |
| Vanguard Institutional Extnd Mkt Idx Tr | 507.26K | 0.41% | -239.51K |
| State St Russell Sm/Mid Cp® Indx SL Cl I | 459.24K | 0.37% | 399.79K |
| Global X Atnms & Elctrc Vhcls ETF | 451.26K | 0.36% | - |
Recent Insider Transactions
| Date | Name | Role | Activity | Value |
|---|---|---|---|---|
| Jan 28, 2026 | Stefan Constantin Ionel | Chief Technology Officer | Sell | $476.35K |
| Jan 23, 2026 | Stefan Constantin Ionel | Chief Technology Officer | Sell | $19.20K |
| Jan 22, 2026 | Stefan Constantin Ionel | Chief Technology Officer | Sell | $5.93M |
| Jan 21, 2026 | Stefan Constantin Ionel | Chief Technology Officer | Sell | $879.41K |
| Jan 16, 2026 | Sun Kang | - | Sell | $10.52M |
Insider Transactions Trends
| Date | Buy | Sell |
|---|---|---|
| 2026 Q1 | - | 7 |
| 2025 Q4 | - | 4 |
| 2025 Q3 | - | 3 |
| 2025 Q2 | - | 3 |
| 2025 Q1 | - | 4 |
AMPX Ownership FAQ
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