BlackRock files 13G: 5.8% of Amprius (AMPX), 7,297,002 shares

BlackRock, Inc. filed a Schedule 13G reporting beneficial ownership of 7,297,002 shares of Amprius Technologies (AMPX) common stock, representing 5.8% of the class as of September 30, 2025.

Rhea-AI Filing Summary

BlackRock, Inc. filed a Schedule 13G reporting beneficial ownership of 7,297,002 shares of Amprius Technologies (AMPX) common stock, representing 5.8% of the class as of September 30, 2025.

BlackRock reports sole voting power over 7,133,356 shares and sole dispositive power over 7,297,002 shares, with no shared voting or dispositive power. The filing states the securities are held in the ordinary course and not for the purpose of changing or influencing control.

Insights

Equity ownership & governance analyst

Passive 13G shows a 5.8% stake without control intent.

BlackRock disclosed beneficial ownership of 7,297,002 shares of Amprius Technologies, equal to 5.8% of the class as of September 30, 2025. It lists sole voting power for 7,133,356 shares and sole dispositive power for 7,297,002 shares, with zero shared powers.

This is a Schedule 13G, indicating holdings in the ordinary course and no intent to influence control. Actual market impact depends on portfolio management decisions within BlackRock’s reporting business units.

The filing also notes that various underlying persons may receive dividends or sale proceeds, with no single person exceeding 5% of outstanding common shares. Subsequent ownership updates would appear in future beneficial ownership filings.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What stake in AMPX did BlackRock report on Schedule 13G?

BlackRock reported beneficial ownership of 5.8% of the class as of September 30, 2025.

How many AMPX shares does BlackRock beneficially own?

The filing lists 7,297,002 shares beneficially owned.

What voting and dispositive powers did BlackRock disclose for AMPX?

BlackRock reported sole voting power over 7,133,356 shares and sole dispositive power over 7,297,002 shares, with no shared powers.

Is BlackRock’s AMPX filing on Schedule 13G passive?

Yes. It certifies the securities are held in the ordinary course and not to influence control.

What is the event date for BlackRock’s AMPX ownership?

The date of event is September 30, 2025.

Does any single underlying person exceed 5% of AMPX via BlackRock?

No. The filing states no one person’s interest exceeds 5% of outstanding common shares.

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

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Accepted by SEC EDGAR 10/17/2025 - 06:05 PM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

AMPRIUS TECHNOLOGIES INC

(Name of Issuer)

Common Stock

(Title of Class of Securities)

03214Q108

(CUSIP Number)

09/30/2025

(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)

SCHEDULE 13G

CUSIP No. 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 7,133,356.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 7,297,002.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

7,297,002.00

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)

5.8 %

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 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 7297002
(b)	Percent of class: 5.8 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 7133356
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 7297002
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
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:	10/17/2025

Exhibit Information

Exhibit 24: Power of Attorney Exhibit 99: Item 7