Amprius Technologies, Inc. (AMPX) Institutional Ownership & Insider Trading

261 institutions reported holding Amprius Technologies, Inc. shares in 13F filings for the quarter ended 2026-06-30, according to EquiReason's reading of their SEC filings. 37 insider trades on Form 4 since 2025-10-01.

Source: SEC EDGAR filings · figures as of 2026-06-30 · read by EquiReason

AMPXAmprius Technologies, Inc.Follow AMPX — free

Electrical Equipment & Parts · Industrials

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Market cap: 1.2B
P/E TTM: —
Dividend yield: —
52-week: —
Next earnings: 10 Nov, in 17 days

Institutions · all 13F filers

quarter to 30 Jun 2026 · filers in both quarters

261 institutions held 66.7% of the shares. Across filers that reported both quarters, shares held changed +16.0%.

Largest moves, shares (millions)

Institutional flow by quarter

net shares added or trimmed, millions · filers in both quarters

Quarter	Holders	Shares held, M	Change	Increased	New	Decreased	Closed
Jun 26	261	97	+16.0%	108	56	59	37
Mar 26	244	85	+32.3%	93	69	52	30
Dec 25	204	68	+3.9%	82	41	52	28
Sep 25	185	64	+67.9%	60	82	25	15
Jun 25	120	38	+83.0%	45	37	19	16
Mar 25	99	21	+25.7%	32	29	16	18
Dec 24	87	17	+101.0%	28	30	9	8
Sep 24	65	8	-7.7%	24	7	13	10

Amprius Technologies, Inc. — questions

Who owns Amprius Technologies, Inc. stock?: 261 institutions reported Amprius Technologies, Inc. shares in 13F filings for the quarter ended 2026-06-30. The largest: BlackRock, Inc. (7.8%), VANGUARD CAPITAL MANAGEMENT LLC (3.8%), MORGAN STANLEY (3.5%).
Are Amprius Technologies, Inc. insiders buying or selling?: 37 insider trades on Form 4 since 2025-10-01; the full list, with dates, people and plan status, is on this page.

Every figure on this page comes from Amprius Technologies, Inc.'s own SEC filings — see them on SEC EDGAR. Price data is licensed and shown only inside the product.

How these figures are read: methodology · EquiReason.

Important information. Figures on this page are taken from filings submitted to the U.S. Securities and Exchange Commission (SEC) and processed automatically by EquiReason. They may contain errors, omissions or delays, and EquiReason makes no representation or warranty as to their accuracy, completeness or timeliness. Always verify figures against the original filing on SEC EDGAR before relying on them.

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