BlackRock (AMPX holder) discloses 10.7M Amprius shares in ownership update

Rhea-AI Filing Summary

Amprius Technologies Inc. reports that BlackRock, Inc., through certain of its business units, has filed Amendment No. 1 disclosing beneficial ownership of 10,700,817 shares of Amprius common stock, representing 7.4% of the class as of June 30, 2026.

BlackRock is reported to hold 10,483,863 shares with sole voting power and 10,700,817 shares with sole dispositive power, with no shared voting or dispositive power. Various underlying clients have rights to dividends or sale proceeds, but no single client holds more than five percent of Amprius’s outstanding common shares.

Key Figures

Beneficial ownership: 10,700,817 shares Percent of class: 7.4% Sole voting power: 10,483,863 shares +2 more

5 metrics

Beneficial ownership 10,700,817 shares Shares of Amprius Technologies common stock beneficially owned by BlackRock

Percent of class 7.4% Percentage of Amprius Technologies common stock class owned by BlackRock

Sole voting power 10,483,863 shares Shares over which BlackRock has sole power to vote or direct the vote

Sole dispositive power 10,700,817 shares Shares over which BlackRock has sole power to dispose or direct disposition

Shared voting power 0 shares Shares over which BlackRock has shared power to vote

Key Terms

beneficially owned, sole voting power, sole dispositive power, parent holding company, +1 more

5 terms

beneficially owned financial

"reflects the securities beneficially owned, or deemed to be beneficially owned, by certain business units"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

sole voting power financial

"Sole Voting Power 10,483,863.00"

Sole voting power is the exclusive right to cast votes attached to a shareholder’s stock without needing approval from anyone else. Like holding the only remote control for a TV, it lets that holder decide corporate matters such as board members, mergers, and policy changes, making it important to investors because it concentrates control and can strongly influence a company’s strategy and the value of its shares.

sole dispositive power financial

"Sole Dispositive Power 10,700,817.00"

Sole dispositive power is the exclusive legal authority to decide what happens to a security — for example, whether to sell, transfer, or retain shares — without needing anyone else’s permission. Investors care because it signals who truly controls the economic outcome of an investment: like holding the only key to a safe, the holder can realize gains or losses and may trigger regulatory reporting, insider rules, or influence over corporate ownership.

parent holding company financial

"If a parent holding company has filed this schedule, pursuant to (ii)(G)"

Power of Attorney regulatory

"Exhibit 24: Power of Attorney"

A power of attorney is a legal document that allows one person to make decisions and act on behalf of another person, often in financial or legal matters. It’s like giving someone a trusted helper or agent the authority to handle important tasks if you are unable to do so yourself. This matters to investors because it can impact how their assets are managed or transferred if they become unable to oversee their affairs.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 07/27/2026 - 04:25 PM Accepted by SEC EDGAR 07/27/2026 - 04:25 PM Learn about SEC filing dates

FAQ

What percentage of Amprius Technologies (AMPX) does BlackRock now report owning?

BlackRock reports beneficial ownership of 7.4% of Amprius Technologies’ common stock. This stake reflects 10,700,817 shares held through certain BlackRock business units, as disclosed in Amendment No. 1 to its beneficial ownership report as of June 30, 2026.

How many AMPX shares does BlackRock have sole voting power over?

BlackRock has sole voting power over 10,483,863 shares of Amprius Technologies common stock. It reports no shared voting power, indicating that voting authority over these shares rests solely with the relevant BlackRock entities rather than with other parties.

How many Amprius Technologies (AMPX) shares does BlackRock beneficially own in total?

BlackRock beneficially owns 10,700,817 shares of Amprius Technologies common stock. This total corresponds to the shares over which it has sole dispositive power, with no shared dispositive power reported in the ownership disclosure.

Does any single BlackRock client hold more than 5% of AMPX shares?

No single BlackRock client holds more than 5% of Amprius Technologies’ outstanding common shares. While various persons have rights to dividends or sale proceeds on the stock, each individual interest is below the five percent threshold of the total outstanding common shares.

What type of security in Amprius Technologies (AMPX) is held by BlackRock?

BlackRock’s reported holdings are in common stock of Amprius Technologies Inc. The filing specifies the class of securities as common stock, identified by CUSIP number 03214Q108, with all reported ownership and percentage figures tied to this class.

Is BlackRock’s ownership in AMPX held with shared or sole dispositive power?

BlackRock reports sole dispositive power over all 10,700,817 shares of Amprius Technologies common stock it beneficially owns. The disclosure states that there is no shared dispositive power over any of these reported shares.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 1)

AMPRIUS TECHNOLOGIES INC

(Name of Issuer)

Common Stock

(Title of Class of Securities)

03214Q108

(CUSIP Number)

06/30/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 03214Q108

1

Names of Reporting Persons

BlackRock, Inc.

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 10,483,863.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 10,700,817.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

10,700,817.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

7.4 %

12

Type of Reporting Person (See Instructions)

HC

SCHEDULE 13G

Item 1.
(a)	Name of issuer: AMPRIUS TECHNOLOGIES INC
(b)	Address of issuer's principal executive offices: 1180 PAGE AVENUE FREMONT CA 94538
Item 2.
(a)	Name of person filing: BlackRock, Inc. In accordance with SEC Release No. 34-39538 (January 12, 1998), this Schedule 13G reflects the securities beneficially owned, or deemed to be beneficially owned, by certain business units (collectively, the "Reporting Business Units") of BlackRock, Inc. and its subsidiaries and affiliates. It does not include securities, if any, beneficially owned by other business units whose beneficial ownership of securities are disaggregated from that of the Reporting Business Units in accordance with such release.
(b)	Address or principal business office or, if none, residence: BlackRock, Inc., 50 Hudson Yards New York, NY 10001
(c)	Citizenship: See Item 4 of Cover Page
(d)	Title of class of securities: Common Stock
(e)	CUSIP No.: 03214Q108
Item 4.	Ownership
(a)	Amount beneficially owned: 10700817
(b)	Percent of class: 7.4 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 10483863
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 10700817
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required. Various persons have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of the common stock of AMPRIUS TECHNOLOGIES INC. No one person's interest in the common stock of AMPRIUS TECHNOLOGIES INC is more than five percent of the total outstanding common shares.
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary. See Exhibit 99
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

BlackRock, Inc.

Signature:	Spencer Fleming
Name/Title:	Managing Director
Date:	07/27/2026

Exhibit Information

Exhibit 24: Power of Attorney Exhibit 99: Item 7