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AMPX Insider Trading

Insider Ownership Percentage: 12.90%
Insider Buying (Last 12 Months): $0.00
Insider Selling (Last 12 Months): $1,451,799.66

Amprius Technologies Insider Trading History Chart

This chart shows the insider buying and selling history at Amprius Technologies by year and by quarter.

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Amprius Technologies Share Price & Price History

Current Price: $2.75
Price Change: ▼ Price Decrease of -0.08 (-2.83%)
As of 05/15/2025 04:53 PM ET

This chart shows the closing price history over time for AMPX up to the past year.

Skip Chart and Table DataPrice Data in Insider Trading History Table
Days: 30 | 90 | 365

Amprius Technologies Insider Trading History

Transaction DateInsider NameTitleBuy/SellNumber of SharesAverage Share PriceTotal TransactionShares Held After TransactionDetails
2/21/2025Constantin Ionel StefanCTOSell9,066$3.13$28,376.58421,489View SEC Filing Icon  
2/21/2025Jonathan BornsteinInsiderSell13,527$3.13$42,339.51419,197View SEC Filing Icon  
2/21/2025Kang SunCEOSell34,353$3.13$107,524.891,282,621View SEC Filing Icon  
2/21/2025Sandra WallachCFOSell18,142$3.13$56,784.46678,000View SEC Filing Icon  
11/21/2024Constantin Ionel StefanCTOSell8,575$1.96$16,807.00430,555View SEC Filing Icon  
11/21/2024Jonathan BornsteinInsiderSell18,170$1.96$35,613.20454,131View SEC Filing Icon  
11/21/2024Sandra WallachCFOSell17,158$1.96$33,629.68696,142View SEC Filing Icon  
9/5/2024Justin E MirroDirectorSell250,000$0.81$202,500.001,195,000View SEC Filing Icon  
9/3/2024Amprius, Inc.Major ShareholderSell6,300$1.00$6,300.0065,209,252View SEC Filing Icon  
9/3/2024Justin E MirroDirectorSell135,000$1.00$135,000.001,510,000View SEC Filing Icon  
8/21/2024Constantin Ionel StefanCTOSell8,800$1.04$9,152.00386,168View SEC Filing Icon  
8/21/2024Jonathan BornsteinInsiderSell18,644$1.04$19,389.761,528,251View SEC Filing Icon  
8/21/2024Kang SunCEOSell33,333$1.04$34,666.321,350,753View SEC Filing Icon  
8/21/2024Sandra WallachCFOSell17,606$1.04$18,310.24713,300View SEC Filing Icon  
6/14/2024Justin E MirroDirectorSell260,000$1.13$293,800.001,467,142View SEC Filing Icon  
6/12/2024Justin E MirroDirectorSell280,000$1.30$364,000.001,715,000View SEC Filing Icon  
5/21/2024Constantin Ionel StefanCTOSell5,272$1.33$7,011.76399,089View SEC Filing Icon  
5/21/2024Kang SunInsiderSell19,973$1.33$26,564.091,399,697View SEC Filing Icon  
5/21/2024Sandra WallachCFOSell10,549$1.33$14,030.17739,151View SEC Filing Icon  
3/5/2024Jonathan BornsteinInsiderSell109,800$2.92$320,616.00View SEC Filing Icon  
2/6/2024Jonathan BornsteininsiderSell150,000$4.43$664,500.00View SEC Filing Icon  
1/2/2024Jonathan BornsteininsiderSell150,000$4.44$666,000.00View SEC Filing Icon  
12/15/2023Amprius, Inc.Major ShareholderSell100,000$3.54$354,000.0065,215,552View SEC Filing Icon  
12/14/2023Justin E MirroDirectorSell255,000$3.56$907,800.001,785,000View SEC Filing Icon  
12/13/2023Amprius, Inc.Major ShareholderSell100,000$3.62$362,000.0065,415,552View SEC Filing Icon  
12/12/2023Justin E MirroDirectorSell60,000$3.81$228,600.001,900,000View SEC Filing Icon  
12/7/2023Jonathan BornsteininsiderSell54,477$3.88$211,370.76View SEC Filing Icon  
12/7/2023Justin E MirroDirectorSell30,000$3.88$116,400.001,920,000View SEC Filing Icon  
12/5/2023Jonathan BornsteininsiderSell47,756$4.28$204,395.68View SEC Filing Icon  
12/5/2023Justin E MirroDirectorSell30,000$4.32$129,600.001,940,000View SEC Filing Icon  
11/30/2023Justin E MirroDirectorSell45,000$4.19$188,550.001,950,000View SEC Filing Icon  
11/28/2023Justin E MirroDirectorSell45,000$3.71$166,950.001,985,000View SEC Filing Icon  
11/20/2023Jonathan BornsteininsiderSell27,631$3.84$106,103.04View SEC Filing Icon  
11/9/2023Jonathan BornsteininsiderSell49,508$2.82$139,612.56View SEC Filing Icon  
11/7/2023Jonathan BornsteininsiderSell24,809$3.24$80,381.16View SEC Filing Icon  
10/11/2023Jonathan BornsteininsiderSell56,702$4.16$235,880.32View SEC Filing Icon  
9/19/2023Jonathan BornsteininsiderSell143,516$4.37$627,164.92View SEC Filing Icon  
9/14/2023Constantin Ionel StefanCTOSell46,370$3.66$169,714.2063,421View SEC Filing Icon  
6/14/2023Justin E MirroDirectorSell50,000$9.50$475,000.002,558,142View SEC Filing Icon  
See Full Table

SEC Filings (Institutional Ownership Changes) for Amprius Technologies (NYSE:AMPX)

5.04% of Amprius Technologies stock is owned by institutions. Institutional ownership can be a sign of analyst confidence in the fundamentals of the stock.

Institutional Buying and Selling by Quarter

This chart shows the instiutional buying and selling at AMPX by year and by quarter.

Skip Institutional Buying and Selling Chart and Table DataRead Chart Data in Institutional Trading History Table

Amprius Technologies Institutional Trading History

Reporting DateHedge FundShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
5/15/2025Apis Capital Advisors LLC166,000$0.45M0.2%N/A0.141%Search for SEC Filing on Google Icon
5/15/2025Baird Financial Group Inc.500,499$1.34M0.0%N/A0.424%Search for SEC Filing on Google Icon
5/14/2025Walleye Capital LLC55,071$0.15M0.0%-82.0%0.047%Search for SEC Filing on Google Icon
5/14/2025Jump Financial LLC64,796$0.17M0.0%N/A0.055%Search for SEC Filing on Google Icon
5/14/2025HITE Hedge Asset Management LLC161,444$0.43M0.0%N/A0.137%Search for SEC Filing on Google Icon
5/12/2025Nuveen LLC23,300$62K0.0%N/A0.020%Search for SEC Filing on Google Icon
5/12/2025Invesco Ltd.1,166,556$3.13M0.0%-53.0%0.989%Search for SEC Filing on Google Icon
5/9/2025Charles Schwab Investment Management Inc.257,943$0.69M0.0%+30.0%0.219%Search for SEC Filing on Google Icon
5/7/2025Essex Investment Management Co. LLC935,815$2.51M0.5%N/A0.794%Search for SEC Filing on Google Icon
5/6/2025Legato Capital Management LLC277,553$0.74M0.1%N/A0.235%Search for SEC Filing on Google Icon
4/29/2025Bank of New York Mellon Corp31,554$85K0.0%+189.6%0.027%Search for SEC Filing on Google Icon
4/23/2025Oppenheimer & Co. Inc.491,378$1.32M0.0%+319.4%0.417%Search for SEC Filing on Google Icon
4/22/2025Cornerstone Partners Capital Management LLC15,353$41K0.1%N/A0.013%Search for SEC Filing on Google Icon
4/21/2025Kingswood Wealth Advisors LLC59,019$0.15M0.0%+459.2%0.050%Search for SEC Filing on Google Icon
4/17/2025FNY Investment Advisers LLC111,252$0.30M0.2%N/A0.094%Search for SEC Filing on Google Icon
4/8/2025Rhumbline Advisers15,690$42K0.0%+61.1%0.013%Search for SEC Filing on Google Icon
2/25/2025B. Riley Wealth Advisors Inc.45,500$0.13M0.0%+55.8%0.043%Search for SEC Filing on Google Icon
2/17/2025Wolverine Trading LLC15,958$48K0.0%N/A0.015%Search for SEC Filing on Google Icon
2/17/2025Two Sigma Advisers LP45,700$0.13M0.0%N/A0.043%Search for SEC Filing on Google Icon
2/17/2025Two Sigma Investments LP443,311$1.24M0.0%+323.1%0.419%Search for SEC Filing on Google Icon
2/17/2025Nuveen Asset Management LLC23,300$65K0.0%-70.6%0.022%Search for SEC Filing on Google Icon
2/17/2025Millennium Management LLC717,571$2.01M0.0%N/A0.678%Search for SEC Filing on Google Icon
2/17/2025Blackstone Inc.257,923$0.72M0.0%N/A0.244%Search for SEC Filing on Google Icon
2/17/2025Bank of America Corp DE12,890$36K0.0%+31.1%0.012%Search for SEC Filing on Google Icon
2/14/2025Mercer Global Advisors Inc. ADV10,000$28K0.0%N/A0.009%Search for SEC Filing on Google Icon
2/14/2025Jane Street Group LLC258,618$0.72M0.0%N/A0.244%Search for SEC Filing on Google Icon
2/14/2025Utah Retirement Systems36,846$0.10M0.0%N/A0.035%Search for SEC Filing on Google Icon
2/14/2025Northern Trust Corp208,420$0.58M0.0%+33.6%0.197%Search for SEC Filing on Google Icon
2/13/2025Marshall Wace LLP53,635$0.15M0.0%N/A0.051%Search for SEC Filing on Google Icon
2/13/2025XTX Topco Ltd280,094$0.78M0.1%+486.4%0.265%Search for SEC Filing on Google Icon
2/13/2025Board of Trustees of The Leland Stanford Junior University1,457,557$4.08M0.3%N/A1.377%Search for SEC Filing on Google Icon
2/13/2025DRW Securities LLC33,557$94K0.0%N/A0.032%Search for SEC Filing on Google Icon
2/13/2025Advisory Services Network LLC35,349$99K0.0%N/A0.033%Search for SEC Filing on Google Icon
2/13/2025Renaissance Technologies LLC765,100$2.14M0.0%+5,740.5%0.723%Search for SEC Filing on Google Icon
2/13/2025Invesco Ltd.2,484,662$6.96M0.0%+56.5%2.348%Search for SEC Filing on Google Icon
2/12/2025Geode Capital Management LLC580,819$1.63M0.0%+6.0%0.549%Search for SEC Filing on Google Icon
2/12/2025Diametric Capital LP24,445$68K0.0%N/A0.023%Search for SEC Filing on Google Icon
2/12/2025Cannell & Spears LLC26,270$74K0.0%-29.8%0.025%Search for SEC Filing on Google Icon
2/11/2025Lexington Partners L.P.76,764$0.22M0.3%N/A0.073%Search for SEC Filing on Google Icon
2/11/2025AXQ Capital LP15,655$44K0.0%N/A0.015%Search for SEC Filing on Google Icon
2/11/2025Sei Investments Co.10,229$29K0.0%-84.5%0.010%Search for SEC Filing on Google Icon
2/11/2025American Century Companies Inc.24,207$68K0.0%N/A0.023%Search for SEC Filing on Google Icon
2/7/2025HighTower Advisors LLC15,500$43K0.0%N/A0.015%Search for SEC Filing on Google Icon
2/7/2025O Dell Group LLC12,410$35K0.0%N/A0.012%Search for SEC Filing on Google Icon
2/6/2025Charles Schwab Investment Management Inc.198,442$0.56M0.0%-27.6%0.187%Search for SEC Filing on Google Icon
2/5/2025Pathway Capital Management LP87,510$0.25M0.2%N/A0.083%Search for SEC Filing on Google Icon
2/5/2025Oppenheimer & Co. Inc.117,150$0.33M0.0%N/A0.111%Search for SEC Filing on Google Icon
1/30/2025Rhumbline Advisers9,739$27K0.0%+49.4%0.009%Search for SEC Filing on Google Icon
1/22/2025Kingswood Wealth Advisors LLC10,554$30K0.0%N/A0.010%Search for SEC Filing on Google Icon
1/14/2025Hamilton Lane Advisors LLC46,058$0.13M0.1%N/A0.044%Search for SEC Filing on Google Icon
12/26/2024JPMorgan Chase & Co.27,041$30K0.0%+343.1%0.026%Search for SEC Filing on Google Icon
12/13/2024B. Riley Wealth Advisors Inc.29,200$31K0.0%+29.8%0.028%Search for SEC Filing on Google Icon
11/16/2024Geode Capital Management LLC548,138$0.61M0.0%+50.9%0.494%Search for SEC Filing on Google Icon
11/15/2024XTX Topco Ltd47,762$53K0.0%-15.3%0.043%Search for SEC Filing on Google Icon
11/15/2024State Street Corp286,390$0.32M0.0%+4.7%0.258%Search for SEC Filing on Google Icon
11/12/2024Charles Schwab Investment Management Inc.274,047$0.30M0.0%+124.7%0.247%Search for SEC Filing on Google Icon
8/19/2024B. Riley Wealth Advisors Inc.22,500$29K0.0%+84.4%0.021%Search for SEC Filing on Google Icon
8/15/2024AQR Capital Management LLC78,314$99K0.0%N/A0.073%Search for SEC Filing on Google Icon
8/12/2024XTX Topco Ltd56,369$72K0.0%N/A0.052%Search for SEC Filing on Google Icon
8/9/2024Warberg Asset Management LLC133,637$0.17M0.0%-52.5%0.124%Search for SEC Filing on Google Icon
3/15/2024B. Riley Wealth Advisors Inc.15,775$83K0.0%+29.3%0.018%Search for SEC Filing on Google Icon
2/13/2024Tower Research Capital LLC TRC8,252$44K0.0%+45.9%0.009%Search for SEC Filing on Google Icon
1/25/2024International Assets Investment Management LLC13,357$0.71M0.0%N/A0.015%Search for SEC Filing on Google Icon
1/24/2024International Assets Investment Management LLC13,357$0.71M0.0%N/A0.015%Search for SEC Filing on Google Icon
1/12/2024FNY Investment Advisers LLC16,000$84K0.1%N/A0.018%Search for SEC Filing on Google Icon
12/1/2023B. Riley Wealth Advisors Inc.12,200$58K0.0%N/A0.014%Search for SEC Filing on Google Icon
11/13/2023Invesco Ltd.1,689,124$8.01M0.0%N/A1.958%Search for SEC Filing on Google Icon
11/13/2023Kestra Advisory Services LLC102,050$0.48M0.0%N/A0.118%Search for SEC Filing on Google Icon
11/8/2023Pathstone Family Office LLC12,750$60K0.0%N/A0.015%Search for SEC Filing on Google Icon
11/7/2023Barclays PLC29,163$0.14M0.0%+2,623.0%0.034%Search for SEC Filing on Google Icon
8/9/2023IPG Investment Advisors LLC25,000$0.18M0.0%N/A0.029%Search for SEC Filing on Google Icon
11/10/2022ExodusPoint Capital Management LP19,768$0.18M0.0%N/A0.060%Search for SEC Filing on Google Icon
Data available starting January 2016

See Full Table
Amprius Technologies logo
Amprius Technologies, Inc. produces and sells ultra-high energy density lithium-ion batteries for mobility applications. The company offers silicon nanowire anode batteries. Its batteries are primarily used for existing and emerging aviation applications, including unmanned aerial systems, such as drones and high-altitude pseudo satellites. The company was incorporated in 2008 and is headquartered in Fremont, California.
Read More on Amprius Technologies

Today's Range

Now: $2.75
Low: $2.67
High: $2.79

50 Day Range

MA: $2.44
Low: $1.78
High: $3.30

52 Week Range

Now: $2.75
Low: $0.61
High: $4.21

Volume

2,919,016 shs

Average Volume

2,320,282 shs

Market Capitalization

$324.30 million

P/E Ratio

N/A

Dividend Yield

N/A

Beta

2.23

Who are the company insiders with the largest holdings of Amprius Technologies?

Amprius Technologies' top insider investors include:
  1. Amprius, Inc (Major Shareholder)
  2. Justin E Mirro (Director)
  3. Jonathan Bornstein (Insider)
  4. Kang Sun (Insider)
  5. Kang Sun (CEO)
  6. Sandra Wallach (CFO)
  7. Constantin Ionel Stefan (CTO)
Learn More about top insider investors at Amprius Technologies.

Who are the major institutional investors of Amprius Technologies?

Amprius Technologies' top institutional shareholders include:
  1. Invesco Ltd. — 0.99%
  2. Essex Investment Management Co. LLC — 0.79%
  3. Baird Financial Group Inc. — 0.42%
  4. Oppenheimer & Co. Inc. — 0.42%
  5. Legato Capital Management LLC — 0.24%
  6. Charles Schwab Investment Management Inc. — 0.22%
Learn More about top institutional investors of Amprius Technologies stock.

Which institutional investors are selling Amprius Technologies stock?

During the last quarter, AMPX stock was sold by these institutional investors:
  1. Invesco Ltd.
  2. Walleye Capital LLC
Within the previous year, company insiders that have sold Amprius Technologies company stock include:
  1. Amprius, Inc (Major Shareholder)
  2. Justin E Mirro (Director)
  3. Jonathan Bornstein (Insider)
  4. Kang Sun (Insider)
  5. Kang Sun (CEO)
  6. Sandra Wallach (CFO)
  7. Constantin Ionel Stefan (CTO)
Learn More investors selling Amprius Technologies stock.

Which institutional investors are buying Amprius Technologies stock?

During the previous quarter, AMPX stock was bought by institutional investors including:
  1. Essex Investment Management Co. LLC
  2. Baird Financial Group Inc.
  3. Oppenheimer & Co. Inc.
  4. Legato Capital Management LLC
  5. Apis Capital Advisors LLC
  6. HITE Hedge Asset Management LLC
  7. FNY Investment Advisers LLC
  8. Jump Financial LLC