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Amprius Technologies, Inc.

AMPX
Exchange
NYSE
Industry
Miscellaneous Electrical Machinery, Equipment & Supplies
SEC CIK
0001899287

In the last 90 days, Amprius Technologies, Inc. insiders filed 0 open-market purchases and 3 sales; 261 institutions reported holding it in 13F filings for Q2 2026, worth $1.35B in total; no superinvestor holds it.

Other share classesAMPX.WT

Q4 2025 vs. Q3 2025

How the institutions holding Amprius Technologies, Inc. changed between Q3 2025 and Q4 2025.

All holders in Q4 2025All holders in Q3 2025

13F holders of AMPX: Q3 2025 compared with Q4 2025
MeasureQ3 2025Of which not filed for Q4 2025Q4 2025Change
Holders1872206+21
Shares63.6M185.9K67.7M+4.31M (+6.8%)
Value$669.4M$1.96M$534.7M−$132.7M (−19.9%)

2 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so the changes leave them out.

New holders (49)

Institutions that held Amprius Technologies, Inc. at the end of Q4 2025 but not at the end of Q3 2025.

Institutions new to AMPX in Q4 2025
InstitutionSharesValue% of portfolio
Norges Bank1,304,838$10.3M0.00%
Hudson Bay Capital Management LP1,100,000$8.68M0.05%
William Blair Investment Management, LLC984,906$7.77M0.02%
Qube Research & Technologies Ltd874,080$6.90M0.01%
Hood River Capital Management LLC809,744$6.39M0.07%
Silvercrest Asset Management Group LLC359,386$2.84M0.02%
SG Americas Securities, LLC255,252$2.01M0.00%
Hussman Strategic Advisors, Inc.210,000$1.66M0.40%
Amundi140,306$1.11M0.00%
Alberta Investment Management Corp126,900$1.00M0.01%
Mangrove Partners116,624$920.2K0.07%
Ambassador Advisors, LLC101,175$798.3K0.12%
Franklin Resources Inc78,837$622.0K0.00%
Polar Asset Management Partners Inc.78,600$620.2K0.01%
Granahan Investment Management Inc64,382$508.0K0.02%
Canada Pension Plan Investment Board55,100$434.7K0.00%
AlphaCentric Advisors LLC50,000$394.5K0.39%
Bayforest Capital Ltd36,882$291.0K0.22%
ExodusPoint Capital Management, LP26,560$209.6K0.00%
Aquatic Capital Management LLC26,218$206.9K0.01%
Lombard Odier Asset Management (USA) Corp23,942$188.9K0.08%
Commonwealth Equity Services, LLC21,577$170.2K0.00%
Bridgefront Capital, LLC20,609$162.6K0.04%
Wealthfront Advisers LLC14,352$113.2K0.00%
Capital Performance Advisors LLP13,974$110.3K0.01%
Vident Advisory, LLC13,564$107.0K0.00%
AlphaGrep UK Ltd12,895$101.7K0.03%
Scientech Research LLC12,810$101.1K0.06%
Universal- Beteiligungs- und Servicegesellschaft mbH11,269$88.9K0.00%
Brinker Capital Investments, LLC10,919$86.2K0.00%
Worth Venture Partners, LLC10,875$85.8K0.62%
Cambridge Financial Group, LLC10,000$78.3K0.03%
Clear Street Markets LLC6,850$54.0K0.01%
Leonteq Securities AG6,000$47.3K0.00%
Acadian Asset Management LLC3,669$28.0K0.00%
Towarzystwo Funduszy Inwestycyjnych Pzu SA2,500$19.7K0.00%
State of Wyoming2,367$18.7K0.00%
BNP PARIBAS ASSET MANAGEMENT Holding S.A.1,620$13.0K0.00%
Global X Japan Co., Ltd.1,487$11.7K0.00%
Federation des caisses Desjardins du Quebec300$2.37K0.00%
Cornerstone Financial Management LLC205$1.62K0.00%
Signaturefd, LLC172$1.36K0.00%
Armstrong Advisory Group, Inc148$1.17K0.00%
ORG Partners LLC120$9460.00%
Quattro Advisors LLC40$3190.00%
DV Trading LLC16$1260.00%
Larson Financial Group LLC15$1180.00%
IFP Advisors, Inc9$710.00%
CIBC Private Wealth Group, LLC1$80.00%

Sold out (28)

Institutions that held Amprius Technologies, Inc. at the end of Q3 2025 and filed for Q4 2025 without it.

Institutions that sold out of AMPX in Q4 2025
InstitutionShares, Q3 2025Value, Q3 2025
Tudor Investment Corp Et Al715,736$7.53M
Capitolis Liquid Global Markets LLC680,600$7.16M
Arrowstreet Capital, Limited Partnership471,791$4.96M
Next Century Growth Investors LLC228,628$2.41M
Quadrature Capital Ltd180,197$1.90M
XTX Topco Ltd173,005$1.82M
HRT Financial LP150,564$1.58M
Quantbot Technologies LP131,922$1.39M
Entropy Technologies, LP90,101$947.9K
Picton Mahoney Asset Management70,981$746.0K
Brevan Howard Capital Management LP69,792$734.2K
Schonfeld Strategic Advisors LLC65,386$687.9K
Omers Administration Corp64,400$677.5K
Dynamic Technology Lab Private Ltd51,550$542.0K
Harbour Capital Advisors, LLC40,315$510.8K
State of Wisconsin Investment Board31,944$336.1K
Diametric Capital, LP31,740$333.9K
Marshall Wace, LLP30,368$319.5K
Group One Trading, L.P.28,891$303.9K
Aigen Investment Management, LP27,190$286.0K
Cambridge Investment Research Advisors, Inc.17,544$185.0K
Prelude Capital Management, LLC14,018$147.5K
Teacher Retirement System of Texas11,563$121.6K
IPG Investment Advisors LLC10,950$115.2K
Atom Investors LP10,472$110.2K
Harbour Investments, Inc.600$6.31K
MCF Advisors LLC292$3.07K
SWAN Capital LLC29$305

Not filed for Q4 2025 yet (2)

Institutions that held Amprius Technologies, Inc. at the end of Q3 2025 and haven't filed a 13F for Q4 2025. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding AMPX in Q3 2025 that haven't filed for Q4 2025
InstitutionShares, Q3 2025Value, Q3 2025
Cubist Systematic Strategies, LLC174,759$1.84M
Bryce Point Capital, LLC11,146$117.3K