Ticker · CUSIP 03214Q108

AMPX

AMPRIUS TECHNOLOGIES INC

Industrials·Electrical Equipment & Parts

···Share

Holders (tracked)

Combined shares

7,045,465

Combined value

$55.59M

Last close

$18.67

Quarter

2025Q4

Price is +136.6% vs the avg quarter-end implied price across tracked holders.

Price · 1Y$18.67+16.53 (+772.43%)H $19.38 · L $2.07 · Avg Vol 7.6M

Position opened

Tracked holders · last 8 quarters

+3 vs previous quarter over the last 8.

SEC event timeline

14 events

AQR Capital Management added2026-02-17
+4,588 shares · 2025Q4
Position
T. Rowe Price added2026-02-17
+31,463 shares · 2025Q4
Position
Two Sigma Investments trimmed2026-02-17
−316,638 shares · 2025Q4
Position
Ken Griffin (Citadel Advisors) trimmed2026-02-17
−2,051,945 shares · 2025Q4
Position
Izzy Englander (Millennium Mgmt) added2026-02-17
+497,438 shares · 2025Q4
Position
Steve Cohen (Point72) added2026-02-17
+459,946 shares · 2025Q4
Position
Renaissance Technologies added2026-02-12
+100,425 shares · 2025Q4
Position
Norges Bank (Norway SWF) opened position2026-02-10
+1,304,838 shares · 2025Q4
Position
Izzy Englander (Millennium Mgmt) trimmed2025-11-14
−3,028,548 shares · 2025Q3
Position
Steve Cohen (Point72) opened position2025-11-14
+33,916 shares · 2025Q3
Position
Two Sigma Investments added2025-11-14
+341,969 shares · 2025Q3
Position
T. Rowe Price trimmed2025-11-14
−273,892 shares · 2025Q3
Position
AQR Capital Management added2025-11-14
+51,509 shares · 2025Q3
Position
Renaissance Technologies trimmed2025-11-13
−1,334,200 shares · 2025Q3
Position

Insider activity

No insider transactions in the last 30 days.

View full insider history for AMPX →

Follow-the-investor returns

If you'd copied each holder of AMPX…

Cost basis inferred from each manager's quarter-over-quarter position changes. Sorted by % return on the position they're still holding.

Investor	First in	Cost basis	Return	Position value today
Two Sigma Investments	2024Q2	$5.02	+271.6%	$26.8M
AQR Capital Management	2024Q2	$5.47	+241.2%	$2.5M
Izzy Englander (Millennium Mgmt)	2022Q3	$5.57	+235.4%	$20.3M
T. Rowe Price	2025Q2	$5.65	+230.4%	$1.5M
Renaissance Technologies	2024Q3	$7.48	+149.5%	$2.1M
Norges Bank (Norway SWF)	2025Q4	$7.89	+136.6%	$24.4M
Steve Cohen (Point72)	2025Q3	$8.03	+132.4%	$1.3M
Steve Cohen (Point72)	2025Q3	$8.03	+132.4%	$1.3M
Steve Cohen (Point72)	2025Q3	$8.03	+132.4%	$1.3M
Ken Griffin (Citadel Advisors)	2022Q3	$8.67	+115.3%	$9.4M
Ken Griffin (Citadel Advisors)	2022Q3	$8.67	+115.3%	$9.4M
Ken Griffin (Citadel Advisors)	2022Q3	$8.67	+115.3%	$9.4M

Who moved on this name in 2025Q4

Position changes reported for the latest quarter, grouped by direction.

New positions1

Norges Bank (Norway SWF)
+1,304,838
$10.3M

Added to5

Izzy Englander (Millennium Mgmt)
+497,438
$3.9M
Steve Cohen (Point72)
+459,946
$3.6M
Renaissance Technologies
+100,425
$792K
AQR Capital Management
+4,588
$36K
T. Rowe Price
+31,463
$248

Trimmed2

Ken Griffin (Citadel Advisors)
−2,051,945
$16.2M
Two Sigma Investments
−316,638
$2.5M

Exited0

—

Institutional ownership over time

Distinct super-investors holding this ticker · combined dollar value, by quarter.

Quarter	Holders	Shares	Combined value	Δ holders
2022Q3	2	30,278	$279K	—
2022Q4	4	353,903	$2.8M	+2
2023Q1	3	334,236	$2.9M	-1
2023Q2	1	408,720	$2.9M	-2
2023Q3	4	642,841	$3.0M	+3
2023Q4	4	636,333	$3.4M	—
2024Q1	5	799,731	$2.1M	+1
2024Q2	7	1,225,530	$1.6M	+2
2024Q3	5	174,752	$194K	-2
2024Q4	6	2,034,930	$5.7M	+1
2025Q1	7	2,012,662	$5.4M	+1
2025Q2	8	7,105,854	$29.9M	+1
2025Q3	9	6,030,250	$63.4M	+1
2025Q4	12	7,045,465	$55.6M	+3

Who owns AMPX

12 super-investors · 2025Q4

Tracked stake

7.05M

Combined value

$56M

% of shares outstanding

—

shares-out unknown

Quarter action mix

New1Added7Trim4

#	Manager	Shares	Value	% of book	Last action	8Q trend
1	Two Sigma Investments	1.44M	$11M	0.0%	Trim−316.6K
2	Norges Bank Norway SWF	1.30M	$10M	0.0%	New+1.30M	—
3	Izzy Englander Millennium Mgmt	1.09M	$9M	0.0%	Added+497.4K
4	Ken Griffin Citadel Advisors	746.3K	$6M	0.0%	Trim−2.05M
5	Steve Cohen Point72	619.3K	$5M	0.0%	Added+459.9K
6	Ken Griffin Citadel Advisors	505.3K	$4M	0.0%	Trim−2.05M
7	Steve Cohen Point72	493.9K	$4M	0.0%	Added+459.9K
8	Ken Griffin Citadel Advisors	454.9K	$4M	0.0%	Trim−2.05M
9	AQR Capital Management	136.1K	$1M	0.0%	Added+4.6K
10	Renaissance Technologies	112.8K	$890K	0.0%	Added+100.4K
11	T. Rowe Price	80.6K	$636K	0.0%	Added+31.5K
12	Steve Cohen Point72	69.3K	$547K	0.0%	Added+459.9K

Recent moves

20 transactions

TRIMTwo Sigma Investments
−316,638 · 2025Q4
ADDAQR Capital Management
+4,588 · 2025Q4
TRIMKen Griffin (Citadel Advisors)
−2,051,945 · 2025Q4
ADDSteve Cohen (Point72)
+459,946 · 2025Q4
ADDIzzy Englander (Millennium Mgmt)
+497,438 · 2025Q4
ADDT. Rowe Price
+31,463 · 2025Q4
ADDRenaissance Technologies
+100,425 · 2025Q4
NEWNorges Bank (Norway SWF)
+1,304,838 · 2025Q4
TRIMIzzy Englander (Millennium Mgmt)
−3,028,548 · 2025Q3
TRIMT. Rowe Price
−273,892 · 2025Q3
NEWSteve Cohen (Point72)
+33,916 · 2025Q3
ADDTwo Sigma Investments
+341,969 · 2025Q3
ADDAQR Capital Management
+51,509 · 2025Q3
TRIMRenaissance Technologies
−1,334,200 · 2025Q3
ADDAQR Capital Management
+2,238 · 2025Q2
ADDTwo Sigma Investments
+1,000,130 · 2025Q2
ADDIzzy Englander (Millennium Mgmt)
+2,220,367 · 2025Q2
NEWT. Rowe Price
+323,007 · 2025Q2
ADDRenaissance Technologies
+1,332,200 · 2025Q2
ADDIzzy Englander (Millennium Mgmt)
+678,442 · 2025Q1

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