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The company

Amprius Technologies, Inc.

AMPX · NYSE

TechnologyElectronic Components & EMSNot moving yetDefense-Tech

AMPX stood above a rising 150-day average in 31 of the last 52 weekly readings, and has been out of that trend for the last 17 weeks. It is 44.9% below that average now. Electronic Components & EMS: 13% of its 96 stocks in an uptrend (−6 points in four weeks); Technology: 29% (−3 points in four weeks).

SEC filings

Statistics

Rotation: Not moving yet
Weeks in an uptrend: out for 17
Industry in uptrend: 13% -6 in 4 wk
Insider buys, 12 months: $0
Insider sales, 12 months: $157.7M
Officials’ trades on record: 0
Institutions holding: 249 (+17)

In the rotation

Each square a week: lit when it closed above a rising 150-day average. 31 of 52 weeks.

17 Apr – 16 Oct

Electronic Components & EMS: Few of its stocks are in an uptrend and the share has been slipping. Technology: A minority of its stocks are in an uptrend and the share has been slipping.

Money in and out

1 Nov 2024 – 1 Oct 2026

Open-market buys above the line and sales below, in dollars.

Congress and officials

No member of Congress or official has disclosed a trade in it.

Insiders

Buy orders, 12 months0

Sale orders, 12 months32

Buyers · sellers0 · 6

Who	Did	Shares	Traded
Thomas M. StepienChief Executive Officer	sold	8,000at $10.03	24 Aug 2026filed 25 Aug 2026
Kang SunDirector	sold	62,101at $10.34	21 Aug 2026filed 25 Aug 2026
Constantin Ionel StefanChief Technology Officer	sold	29,681at $10.34	21 Aug 2026filed 25 Aug 2026
Thomas M. StepienChief Executive Officer	sold	23,529at $10.34	21 Aug 2026filed 25 Aug 2026
Donald R. DixonDirector	sold	85,000at $17.17	15 Jun 2026filed 16 Jun 2026
Donald R. DixonDirector	sold	40,000at $19.13	9 Jun 2026filed 11 Jun 2026
Thomas M. StepienChief Executive Officer	sold	2,000at $20.97	4 Jun 2026filed 5 Jun 2026
Kang SunDirector	sold	356at $17.19	27 May 2026filed 28 May 2026
Constantin Ionel StefanChief Technology Officer	sold	3,208at $17.19	27 May 2026filed 28 May 2026
Thomas M. StepienChief Executive Officer	sold	4,375at $17.19	27 May 2026filed 28 May 2026
Donald R. DixonDirector	sold	17,895at $17.90	26 May 2026filed 28 May 2026
Kang SunDirector	sold	67,796at $14.79	21 May 2026filed 26 May 2026

Lines filed since 2 January 2026, newest first; every insider’s older lines are on their own page.

Institutions

Holders249+17 on the quarter

New · exited63 · 46

Reported value$1.3B

Quarter to 30 Jun 2026, against 31 Mar 2026; newest filing 31 Aug 2026.

Manager	Shares	Change
BlackRock, Inc.added · filed 7 Aug 2026	11,335,092$157.1M	+2,109,481+22.9%
VANGUARD CAPITAL MANAGEMENT LLCadded · filed 13 Aug 2026	5,562,985$77.1M	+654,110+13.3%
MORGAN STANLEYadded · filed 13 Aug 2026	5,105,505$70.8M	+1,943,338+61.5%
TWO SIGMA INVESTMENTS, LPadded · filed 14 Aug 2026	4,318,630$59.9M	+812,555+23.2%
UBS Group AGadded · filed 13 Aug 2026	4,072,269$56.4M	+1,760,715+76.2%
GEODE CAPITAL MANAGEMENT, LLCadded · filed 12 Aug 2026	3,520,655$48.8M	+706,125+25.1%
JANE STREET GROUP, LLCreduced · filed 14 Aug 2026	3,401,071$47.1M	-759,585−18.3%
STATE STREET CORPadded · filed 7 Aug 2026	3,240,285$44.9M	+527,655+19.5%
GOLDMAN SACHS GROUP INCadded · filed 14 Aug 2026	2,542,294$35.2M	+316,113+14.2%
JUPITER ASSET MANAGEMENT LTDnew · filed 10 Aug 2026	2,133,397$29.6M	+2,133,397