Amprius Ownership | Who Owns Amprius?


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Amprius Ownership Summary


Amprius is owned by 31.20% institutional investors, 8.89% insiders, and 59.91% retail investors. Blackrock funding, inc. /de is the largest institutional shareholder, holding 4.33% 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


TypeName% Inst% Insiders% Retail
StockAmprius31.20%8.89%59.91%
SectorIndustrials Stocks 59.83%12.72%27.46%
IndustryElectrical Equipment Stocks39.21%19.60%41.19%
IdeaElectric Vehicle Stocks List24.51%18.10%57.39%
IdeaEV Battery Stocks List20.05%15.81%64.14%

Institutional Shareholders


Top Institutional Shareholders by Total Shares

HolderShares% HoldingValue
Blackrock funding, inc. /de5.27M4.33%$22.19M
Vanguard group4.18M3.78%$11.70M
Invesco2.48M2.25%$6.96M
Board of trustees of the leland stanford junior university1.46M1.32%$4.08M
Marshall wace, llp1.11M0.91%$4.65M
Baird financial group1.00M0.82%$4.21M
Stifel financial895.76K0.81%$2.51M
Blackrock629.73K0.70%$799.75K
Renaissance765.10K0.69%$2.14M
Millennium management717.57K0.65%$2.01M

Top Institutional Shareholders by % of Total Assets

HolderShares% AssetsValue
Cornerstone partners capital management30.71K0.39%$129.27K
Board of trustees of the leland stanford junior university1.46M0.35%$4.08M
Lexington partners76.76K0.26%$214.94K
Legato capital management276.87K0.14%$1.17M
Apis capital advisors60.00K0.09%$252.60K
Hite hedge asset management161.44K0.04%$679.68K
Ewa19.01K0.03%$80.05K
Polar asset management partners274.79K0.02%$1.16M
Dynamic technology lab private30.23K0.02%$127.00K
Bridgeway capital management195.00K0.01%$546.00K

Top Buyers

HolderShares% AssetsChange
Blackrock funding, inc. /de5.27M0.00%4.20M
Vanguard group4.18M0.00%3.20M
Board of trustees of the leland stanford junior university1.46M0.35%1.46M
Invesco2.48M0.00%897.22K
Renaissance765.10K0.00%752.00K

Top Sellers

HolderShares% AssetsChange
Zazove associates---969.93K
Blackstone---257.92K
Lmr partners llp---165.41K
Warberg asset management---133.64K
Fny investment advisers---111.25K

New Positions

HolderShares% AssetsChangeValue
Board of trustees of the leland stanford junior university1.46M0.35%1.46M$4.08M
Polar asset management partners274.79K0.02%274.79K$1.16M
Cowen and company250.00K0.01%250.00K$317.50K
Group one trading148.42K0.00%148.42K$415.57M
Graham capital management141.54K0.01%141.54K$595.90K

Sold Out

HolderChange
Nelson, van denburg & campbell wealth management group-2.00
Kestra investment management-10.00
Srs capital advisors-60.00
Ifp advisors-66.00
Allworth financial lp-81.00

Institutional Ownership Trends


DateHoldingsChange %SharesChange %OwnershipChange %Increased PositionChange %Decreased PositionChange %
Jun 30, 202512516.82%37,991,40482.87%3110.06%8226.15%2237.50%
Mar 31, 20251066.00%20,840,40025.25%177.78%64-3.03%1660.00%
Dec 31, 20249729.33%16,490,47299.57%1426.67%6365.79%10-33.33%
Sep 30, 2024741.37%8,233,8837.69%710.34%37-19.57%15114.29%
Jun 30, 20247337.74%7,645,78055.04%825.95%46109.09%7-56.25%

Top Mutual Funds Shareholders


HolderShares% HoldingChange
Vanguard Total Stock Mkt Idx Inv2.61M2.09%-58.09K
iShares Russell 2000 ETF2.19M1.75%-41.69K
Invesco WilderHill Clean Energy ETF1.10M0.91%-
iShares Russell 2000 Growth ETF826.11K0.66%-
Vanguard US Total Market Shares ETF593.90K0.50%-
Vanguard US Momentum Factor ETF539.86K0.45%80.60K
Vanguard Institutional Extnd Mkt Idx Tr507.26K0.41%-239.51K
State St Russell Sm/Mid Cp® Indx SL Cl I459.24K0.37%399.79K
Vanguard Russell 2000 ETF443.96K0.35%-30.64K
State St Russell Sm Cap® Indx SL Cl I328.90K0.26%-

Recent Insider Transactions


DateNameRoleActivityValue
May 21, 2025Stefan Constantin Ionel Chief Technology OfficerSell$49.53K
May 21, 2025Wallach Sandra Chief Financial OfficerSell$67.11K
May 21, 2025Sun Kang Chief Executive OfficerSell$169.72K
Feb 21, 2025Sun Kang Chief Executive OfficerSell$107.63K
Feb 21, 2025Wallach Sandra Chief Financial OfficerSell$56.84K

Insider Transactions Trends


DateBuySell
2025 Q2-3
2025 Q1-4
2024 Q4-6
2024 Q3-12
2024 Q2-15

AMPX Ownership FAQ


Who Owns Amprius?

Amprius shareholders are primarily institutional investors at 31.20%, followed by 8.89% insiders and 59.91% retail investors. The average institutional ownership in Amprius's industry, Electrical Equipment Stocks, is 39.21%, which Amprius falls below.

Who owns the most shares of Amprius?

Amprius’s largest shareholders are Blackrock funding, inc. /de (5.27M shares, 4.33%), Vanguard group (4.18M shares, 3.78%), and Invesco (2.48M shares, 2.25%). Together, they hold 10.36% of Amprius’s total shares outstanding.

Does Blackrock own Amprius?

Yes, BlackRock owns 0.70% of Amprius, totaling 629.72K shares as of Jun 2024. This represents 0% of BlackRock's total assets, with a market value of 799.75K$. In the last quarter, BlackRock increased its holdings by 106.94K shares, a 20.46% change.

Who is Amprius’s biggest shareholder by percentage of total assets invested?

Cornerstone partners capital management is Amprius’s biggest shareholder by percentage of total assets invested, with 0.39% of its assets in 30.71K Amprius shares, valued at 129.27K$.

Who is the top mutual fund holder of Amprius shares?

Vanguard Total Stock Mkt Idx Inv is the top mutual fund holder of Amprius shares, with 2.09% of its total shares outstanding invested in 2.61M Amprius shares.

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