AMPX Insider Trading

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Insider Trading History
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About

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

Amprius Technologies Share Price & Price History

^$2.87

▲ +0.13 (4.74%)

As of 05/13/2025 04:59 PM ET

Days: 30 | 90 | 365

Amprius Technologies Insider Trading History

Transaction Date	Insider Name	Title	Buy/Sell	Number of Shares	Average Share Price	Total Transaction	Shares Held After Transaction
2/21/2025	Constantin Ionel Stefan	CTO	Sell	9,066	$3.13	$28,376.58	421,489
2/21/2025	Jonathan Bornstein	Insider	Sell	13,527	$3.13	$42,339.51	419,197
2/21/2025	Kang Sun	CEO	Sell	34,353	$3.13	$107,524.89	1,282,621
2/21/2025	Sandra Wallach	CFO	Sell	18,142	$3.13	$56,784.46	678,000
11/21/2024	Constantin Ionel Stefan	CTO	Sell	8,575	$1.96	$16,807.00	430,555
11/21/2024	Jonathan Bornstein	Insider	Sell	18,170	$1.96	$35,613.20	454,131
11/21/2024	Sandra Wallach	CFO	Sell	17,158	$1.96	$33,629.68	696,142
9/5/2024	Justin E Mirro	Director	Sell	250,000	$0.81	$202,500.00	1,195,000
9/3/2024	Amprius, Inc.	Major Shareholder	Sell	6,300	$1.00	$6,300.00	65,209,252
9/3/2024	Justin E Mirro	Director	Sell	135,000	$1.00	$135,000.00	1,510,000
8/21/2024	Constantin Ionel Stefan	CTO	Sell	8,800	$1.04	$9,152.00	386,168
8/21/2024	Jonathan Bornstein	Insider	Sell	18,644	$1.04	$19,389.76	1,528,251
8/21/2024	Kang Sun	CEO	Sell	33,333	$1.04	$34,666.32	1,350,753
8/21/2024	Sandra Wallach	CFO	Sell	17,606	$1.04	$18,310.24	713,300
6/14/2024	Justin E Mirro	Director	Sell	260,000	$1.13	$293,800.00	1,467,142
6/12/2024	Justin E Mirro	Director	Sell	280,000	$1.30	$364,000.00	1,715,000
5/21/2024	Constantin Ionel Stefan	CTO	Sell	5,272	$1.33	$7,011.76	399,089
5/21/2024	Kang Sun	Insider	Sell	19,973	$1.33	$26,564.09	1,399,697
5/21/2024	Sandra Wallach	CFO	Sell	10,549	$1.33	$14,030.17	739,151
3/5/2024	Jonathan Bornstein	Insider	Sell	109,800	$2.92	$320,616.00
2/6/2024	Jonathan Bornstein	insider	Sell	150,000	$4.43	$664,500.00
1/2/2024	Jonathan Bornstein	insider	Sell	150,000	$4.44	$666,000.00
12/15/2023	Amprius, Inc.	Major Shareholder	Sell	100,000	$3.54	$354,000.00	65,215,552
12/14/2023	Justin E Mirro	Director	Sell	255,000	$3.56	$907,800.00	1,785,000
12/13/2023	Amprius, Inc.	Major Shareholder	Sell	100,000	$3.62	$362,000.00	65,415,552
12/12/2023	Justin E Mirro	Director	Sell	60,000	$3.81	$228,600.00	1,900,000
12/7/2023	Jonathan Bornstein	insider	Sell	54,477	$3.88	$211,370.76
12/7/2023	Justin E Mirro	Director	Sell	30,000	$3.88	$116,400.00	1,920,000
12/5/2023	Jonathan Bornstein	insider	Sell	47,756	$4.28	$204,395.68
12/5/2023	Justin E Mirro	Director	Sell	30,000	$4.32	$129,600.00	1,940,000
11/30/2023	Justin E Mirro	Director	Sell	45,000	$4.19	$188,550.00	1,950,000
11/28/2023	Justin E Mirro	Director	Sell	45,000	$3.71	$166,950.00	1,985,000
11/20/2023	Jonathan Bornstein	insider	Sell	27,631	$3.84	$106,103.04
11/9/2023	Jonathan Bornstein	insider	Sell	49,508	$2.82	$139,612.56
11/7/2023	Jonathan Bornstein	insider	Sell	24,809	$3.24	$80,381.16
10/11/2023	Jonathan Bornstein	insider	Sell	56,702	$4.16	$235,880.32
9/19/2023	Jonathan Bornstein	insider	Sell	143,516	$4.37	$627,164.92
9/14/2023	Constantin Ionel Stefan	CTO	Sell	46,370	$3.66	$169,714.20	63,421
6/14/2023	Justin E Mirro	Director	Sell	50,000	$9.50	$475,000.00	2,558,142

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

Amprius Technologies Institutional Trading History

Reporting Date	Hedge Fund	Shares Held	Market Value	% of Portfolio	Quarterly Change in Shares	Ownership in Company
5/12/2025	Nuveen LLC	23,300	$62K	0.0%	N/A	0.020%
5/12/2025	Invesco Ltd.	1,166,556	$3.13M	0.0%	-53.0%	0.989%
5/9/2025	Charles Schwab Investment Management Inc.	257,943	$0.69M	0.0%	+30.0%	0.219%
5/7/2025	Essex Investment Management Co. LLC	935,815	$2.51M	0.5%	N/A	0.794%
5/6/2025	Legato Capital Management LLC	277,553	$0.74M	0.1%	N/A	0.235%
4/29/2025	Bank of New York Mellon Corp	31,554	$85K	0.0%	+189.6%	0.027%
4/23/2025	Oppenheimer & Co. Inc.	491,378	$1.32M	0.0%	+319.4%	0.417%
4/22/2025	Cornerstone Partners Capital Management LLC	15,353	$41K	0.1%	N/A	0.013%
4/21/2025	Kingswood Wealth Advisors LLC	59,019	$0.15M	0.0%	+459.2%	0.050%
4/17/2025	FNY Investment Advisers LLC	111,252	$0.30M	0.2%	N/A	0.094%
4/8/2025	Rhumbline Advisers	15,690	$42K	0.0%	+61.1%	0.013%
2/25/2025	B. Riley Wealth Advisors Inc.	45,500	$0.13M	0.0%	+55.8%	0.043%
2/17/2025	Wolverine Trading LLC	15,958	$48K	0.0%	N/A	0.015%
2/17/2025	Two Sigma Advisers LP	45,700	$0.13M	0.0%	N/A	0.043%
2/17/2025	Two Sigma Investments LP	443,311	$1.24M	0.0%	+323.1%	0.419%
2/17/2025	Nuveen Asset Management LLC	23,300	$65K	0.0%	-70.6%	0.022%
2/17/2025	Millennium Management LLC	717,571	$2.01M	0.0%	N/A	0.678%
2/17/2025	Blackstone Inc.	257,923	$0.72M	0.0%	N/A	0.244%
2/17/2025	Bank of America Corp DE	12,890	$36K	0.0%	+31.1%	0.012%
2/14/2025	Mercer Global Advisors Inc. ADV	10,000	$28K	0.0%	N/A	0.009%
2/14/2025	Jane Street Group LLC	258,618	$0.72M	0.0%	N/A	0.244%
2/14/2025	Utah Retirement Systems	36,846	$0.10M	0.0%	N/A	0.035%
2/14/2025	Northern Trust Corp	208,420	$0.58M	0.0%	+33.6%	0.197%
2/13/2025	Marshall Wace LLP	53,635	$0.15M	0.0%	N/A	0.051%
2/13/2025	XTX Topco Ltd	280,094	$0.78M	0.1%	+486.4%	0.265%
2/13/2025	Board of Trustees of The Leland Stanford Junior University	1,457,557	$4.08M	0.3%	N/A	1.377%
2/13/2025	DRW Securities LLC	33,557	$94K	0.0%	N/A	0.032%
2/13/2025	Advisory Services Network LLC	35,349	$99K	0.0%	N/A	0.033%
2/13/2025	Renaissance Technologies LLC	765,100	$2.14M	0.0%	+5,740.5%	0.723%
2/13/2025	Invesco Ltd.	2,484,662	$6.96M	0.0%	+56.5%	2.348%
2/12/2025	Geode Capital Management LLC	580,819	$1.63M	0.0%	+6.0%	0.549%
2/12/2025	Diametric Capital LP	24,445	$68K	0.0%	N/A	0.023%
2/12/2025	Cannell & Spears LLC	26,270	$74K	0.0%	-29.8%	0.025%
2/11/2025	Lexington Partners L.P.	76,764	$0.22M	0.3%	N/A	0.073%
2/11/2025	AXQ Capital LP	15,655	$44K	0.0%	N/A	0.015%
2/11/2025	Sei Investments Co.	10,229	$29K	0.0%	-84.5%	0.010%
2/11/2025	American Century Companies Inc.	24,207	$68K	0.0%	N/A	0.023%
2/7/2025	HighTower Advisors LLC	15,500	$43K	0.0%	N/A	0.015%
2/7/2025	O Dell Group LLC	12,410	$35K	0.0%	N/A	0.012%
2/6/2025	Charles Schwab Investment Management Inc.	198,442	$0.56M	0.0%	-27.6%	0.187%
2/5/2025	Pathway Capital Management LP	87,510	$0.25M	0.2%	N/A	0.083%
2/5/2025	Oppenheimer & Co. Inc.	117,150	$0.33M	0.0%	N/A	0.111%
1/30/2025	Rhumbline Advisers	9,739	$27K	0.0%	+49.4%	0.009%
1/22/2025	Kingswood Wealth Advisors LLC	10,554	$30K	0.0%	N/A	0.010%
1/14/2025	Hamilton Lane Advisors LLC	46,058	$0.13M	0.1%	N/A	0.044%
12/26/2024	JPMorgan Chase & Co.	27,041	$30K	0.0%	+343.1%	0.026%
12/13/2024	B. Riley Wealth Advisors Inc.	29,200	$31K	0.0%	+29.8%	0.028%
11/16/2024	Geode Capital Management LLC	548,138	$0.61M	0.0%	+50.9%	0.494%
11/15/2024	XTX Topco Ltd	47,762	$53K	0.0%	-15.3%	0.043%
11/15/2024	State Street Corp	286,390	$0.32M	0.0%	+4.7%	0.258%
11/12/2024	Charles Schwab Investment Management Inc.	274,047	$0.30M	0.0%	+124.7%	0.247%
8/19/2024	B. Riley Wealth Advisors Inc.	22,500	$29K	0.0%	+84.4%	0.021%
8/15/2024	AQR Capital Management LLC	78,314	$99K	0.0%	N/A	0.073%
8/12/2024	XTX Topco Ltd	56,369	$72K	0.0%	N/A	0.052%
8/9/2024	Warberg Asset Management LLC	133,637	$0.17M	0.0%	-52.5%	0.124%
3/15/2024	B. Riley Wealth Advisors Inc.	15,775	$83K	0.0%	+29.3%	0.018%
2/13/2024	Tower Research Capital LLC TRC	8,252	$44K	0.0%	+45.9%	0.009%
1/25/2024	International Assets Investment Management LLC	13,357	$0.71M	0.0%	N/A	0.015%
1/24/2024	International Assets Investment Management LLC	13,357	$0.71M	0.0%	N/A	0.015%
1/12/2024	FNY Investment Advisers LLC	16,000	$84K	0.1%	N/A	0.018%
12/1/2023	B. Riley Wealth Advisors Inc.	12,200	$58K	0.0%	N/A	0.014%
11/13/2023	Invesco Ltd.	1,689,124	$8.01M	0.0%	N/A	1.958%
11/13/2023	Kestra Advisory Services LLC	102,050	$0.48M	0.0%	N/A	0.118%
11/8/2023	Pathstone Family Office LLC	12,750	$60K	0.0%	N/A	0.015%
11/7/2023	Barclays PLC	29,163	$0.14M	0.0%	+2,623.0%	0.034%
8/9/2023	IPG Investment Advisors LLC	25,000	$0.18M	0.0%	N/A	0.029%
11/10/2022	ExodusPoint Capital Management LP	19,768	$0.18M	0.0%	N/A	0.060%

Data available starting January 2016

See Full Table

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.

Today's Range

Now: $2.87

$2.72

$2.92

50 Day Range

MA: $2.39

$1.78

$3.30

52 Week Range

Now: $2.87

$0.61

$4.21

Volume

3,688,292 shs

Average Volume

2,308,749 shs

Market Capitalization

$338.45 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:
Amprius, Inc (Major Shareholder)
Justin E Mirro (Director)
Jonathan Bornstein (Insider)
Kang Sun (Insider)
Kang Sun (CEO)
Sandra Wallach (CFO)
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:
Invesco Ltd. — 0.99%
Essex Investment Management Co. LLC — 0.79%
Oppenheimer & Co. Inc. — 0.42%
Legato Capital Management LLC — 0.24%
Charles Schwab Investment Management Inc. — 0.22%
FNY Investment Advisers LLC — 0.09%
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:
Invesco Ltd.
Within the previous year, company insiders that have sold Amprius Technologies company stock include:
Amprius, Inc (Major Shareholder)
Justin E Mirro (Director)
Jonathan Bornstein (Insider)
Kang Sun (Insider)
Kang Sun (CEO)
Sandra Wallach (CFO)
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:
Essex Investment Management Co. LLC
Oppenheimer & Co. Inc.
Legato Capital Management LLC
FNY Investment Advisers LLC
Charles Schwab Investment Management Inc.
Kingswood Wealth Advisors LLC
Simplex Trading LLC
Nuveen LLC