Institutional HoldersBeta

Who holds a company, from every 13F filed for the quarter, one row per filer exactly as filed, against the latest share count the company reported.

Amprius Technologies, Inc.

CIK 0001899287AMPXAMPX-WT· quarter ending 2026-06-30

Shares outstanding

146,080,618

as of 2026-07-31 · 10-Q cover page, filed 2026-08-06

Held by 13F filers

4,158,203

selection includes debt or preferreds — no % of shares outstanding

Holders

-3 vs 2026-03-31 · 2 new, 5 exited

Value

$24.7M

shares -57.1% vs prior quarter

Share classes (cover page of the 10-Q filed 2026-08-06, as of 2026-07-31)

Class	Listed	Shares outstanding	Held by 13F filers	% of class	Holders	CUSIP
Common stock	AMPX · NYSE	146,080,618	97,418,354	66.7%	261	03214Q108

Each class is compared with its own share count; classes are not added together. A class that is not exchange-listed cannot be held by 13F filers.

Securities (CUSIPs held in 13F this quarter)

tick to combine

Count	CUSIP	Class (as filers write it)	Holders	Shares held	Class shares	% of class	Value	Options	Mapped via
	03214Q108	COMMON STOCK	261	97,418,354	146,080,618	66.7%	$1.4B	16 call / 17 put	13DG	holders →
	03214Q116	*W EXP 09/14/202not common	10	4,158,203	—	—	$24.7M	—	prefix	holders →

Totals combine the ticked CUSIPs and update as you tick: common-stock classes by default; preferreds, notes, warrants and depositary shares are listed but not counted. "holders →" shows a single CUSIP on its own. Bonds are held as a principal amount, not shares. Options positions are never counted as holdings.

Top holders (10 of 10 · 03214Q116)

change vs 2026-03-31

#	Filer	Shares / principal	% of class	Value	Change
1	LMR Partners LLP	1,899,260	—	$11.1M	-2,590,582 (-57.7%)
2	Caption Management, LLC	1,432,795	—	$8.4M	+348,428 (+32.1%)
3	DRW Securities, LLC	356,445	—	$2.1M	+21,272 (+6.3%)
4	Janney Montgomery Scott LLC	158,405	—	$928K	+100 (+0.1%)
5	ARISTEIA CAPITAL, L.L.C.	142,415	—	$830K	-1,072,982 (-88.3%)
6	ZAZOVE ASSOCIATES LLC	102,096	—	$595K	-36,891 (-26.5%)
7	BOOTHBAY FUND MANAGEMENT, LLC	39,991	—	$554K	-430,009 (-91.5%)
8	HRT FINANCIAL LP	25,983	—	$152K	NEW
9	UBS Group AG	811	—	$5K	NEW
10	Farther Finance Advisors, LLC	2	—	$12	—

Exited since 2026-03-31 (5 filers; largest 5 shown)

CSS LLC/IL	−754,893
Hudson Bay Capital Management LP	−741,715
WOLVERINE ASSET MANAGEMENT LLC	−213,225
Warberg Asset Management LLC	−63,200
D. E. Shaw & Co., Inc.	−29,500

Large holders from 13D/13G (latest per reporting person, last 2 years)

Filed when a holder crosses 5% or changes materially, so often more current than the quarter-end 13F. Percentages are the filer's own, against the share count they used.

Reporting person	Form	Filed	Event	Shares	% of class
Jane Street Capital, LLC	SCHEDULE 13G/A	2026-08-10	2026-06-30	3,751,460	2.7%
Jane Street Global Trading, LLC	SCHEDULE 13G/A	2026-08-10	2026-06-30	962,343	0.7%
JANE STREET GROUP, LLC	SCHEDULE 13G/A	2026-08-10	2026-06-30	4,713,803	3.3%
BlackRock, Inc.	SCHEDULE 13G/A	2026-07-27	2026-06-30	10,700,817	7.4%
The Vanguard Group	SCHEDULE 13G/A	2026-03-26	2026-03-13	0	0%
Andrew Y. Yan	SCHEDULE 13G/A	2025-08-14	2025-06-30	0	0%
SAIF IV GP Capital Ltd.	SCHEDULE 13G/A	2025-08-14	2025-06-30	0	0%
SAIF IV GP, L.P.	SCHEDULE 13G/A	2025-08-14	2025-06-30	0	0%
SAIF Partners IV L.P.	SCHEDULE 13G/A	2025-08-14	2025-06-30	0	0%
SALZMAN ALAN E	SCHEDULE 13G/A	2025-08-06	2025-08-06	3,112,992	2.6%

Source: SEC Form 13F-HR information tables for the quarter ending 2026-06-30 (filed within 45 days of quarter end; amendments applied; values normalised to dollars), the share count from the company's latest 10-K/10-Q XBRL cover page, and Schedule 13D/13G filings. Each row is a legal 13F filer as filed — related entities (e.g. Vanguard's advisers) are not merged. Retail brokerage accounts are not reported on 13F, so the remainder is mostly retail and insiders.