CHU STEVEN sold 71.7% of their position (322.20K shares) of AMPRIUS TECHNOLOGIES, INC. on the open market

Open‑market sale worth $5.86M — a major position exit. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 4 sales

CHU STEVEN

Filed: 3/12/2026ACC: 0001296381-26-000003

InsiderCHU STEVENCIK 1296381

→

IssuerAMPRIUS TECHNOLOGIES, INC.CIK 1899287

Director

Since Mar 2026

-322.20K

Net shares

Net seller

$5.86M

Total sold

Open market trades

0B · 4S

Total transactions

259.70K acquired · 581.89K disposed

Non-Derivative Transactions7

Common stock

Direct

M · Option Exercise

+104.13K

Price / share

$0.62

Trade value

$64.56K

% of position

54.9%

3/10/2026

189.84K→293.97K

Common stock

Direct

S · Sale

−166.63K

Price / share

$17.92

Trade value

$2.99M

% of position

56.7%

3/10/2026

293.97K→127.34K

Common stock

Direct

M · Option Exercise

+86.14K

Price / share

$2.61

Trade value

$224.83K

% of position

67.6%

3/12/2026

127.34K→213.48K

Common stock

Direct

M · Option Exercise

+69.42K

Price / share

$0.62

Trade value

$43.04K

% of position

32.5%

3/12/2026

213.48K→282.90K

Common stock

Direct

S · Sale

−100K

Price / share

$18.65

Trade value

$1.86M

% of position

35.3%

3/12/2026

282.90K→182.90K

Common stock

Direct

S · Sale

−50K

Price / share

$18.21

Trade value

$910.74K

% of position

27.3%

3/12/2026

182.90K→132.90K

Common stock

Direct

S · Sale

−5.57K

Price / share

$18.53

Trade value

$103.15K

% of position

4.2%

3/12/2026

132.90K→127.34K

Total

Net shares

−62.50K

Net value

-$5.53M

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common stock Direct	3/10/2026	M · Option Exercise	+104.13K	$0.62	$64.56K	54.9%	189.84K	293.97K
Common stock Direct	3/10/2026	S · Sale	−166.63K	$17.92	$2.99M	56.7%	293.97K	127.34K
Common stock Direct	3/12/2026	M · Option Exercise	+86.14K	$2.61	$224.83K	67.6%	127.34K	213.48K
Common stock Direct	3/12/2026	M · Option Exercise	+69.42K	$0.62	$43.04K	32.5%	213.48K	282.90K
Common stock Direct	3/12/2026	S · Sale	−100K	$18.65	$1.86M	35.3%	282.90K	182.90K
Common stock Direct	3/12/2026	S · Sale	−50K	$18.21	$910.74K	27.3%	182.90K	132.90K
Common stock Direct	3/12/2026	S · Sale	−5.57K	$18.53	$103.15K	4.2%	132.90K	127.34K
Total			−62.50K		-$5.53M

Derivative Transactions3

Stock Option (right to buy)

Direct

M · Option Exercise

Converts to

Common stock

104.13K shares

−104.13K

Strike price

0.62

Held after

69.42K

Exercisable

—

3/10/2026

Stock Option (right to buy)

Direct

M · Option Exercise

Converts to

Common stock

86.14K shares

−86.14K

Strike price

2.61

Held after

184.11K

Exercisable

—

3/12/2026

Stock Option (right to buy)

Direct

M · Option Exercise

Converts to

Common stock

69.42K shares

−69.42K

Strike price

0.62

Held after

0.00

Exercisable

—

3/12/2026

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Stock Option (right to buy) Direct	Common stock104.13K shares	3/10/2026	M · Option Exercise	−104.13K	0.62	—	69.42K
Stock Option (right to buy) Direct	Common stock86.14K shares	3/12/2026	M · Option Exercise	−86.14K	2.61	—	184.11K
Stock Option (right to buy) Direct	Common stock69.42K shares	3/12/2026	M · Option Exercise	−69.42K	0.62	—	0.00