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Amprius Technologies, Inc.AMPX

Class A AMPXWarrants AMPX-WTCIK 0001899287

Cash in trust

$230M

$230,294,899

Trust per share

$10.01

Redemption value

IPO

Mar 2022

$230M raised

Combination deadline

—

Not disclosed

Filings on record

501

Latest Oct 9, 2026

Business combination

Target
Not disclosed in an indexed filing
Announced
May 12, 2022
Closed
Sep 16, 2022

Overview

Amprius Technologies, Inc. is a special purpose acquisition company incorporated in Delaware and registered with the SEC under CIK 0001899287. It completed its initial public offering in Mar 2022, raising $230M in gross proceeds and listing on NYSE. Class A shares trade under the ticker AMPX, warrants under AMPX-WT on NYSE. The vehicle is sponsored by Kensington through Kensington Capital Sponsor IV LLC. The mandate targets media & entertainment. Business combination closed; the company trades under a new ticker.

“we intend to focus our search for a target business operating in the global automotive and automotive-related sector.”
The mandate, as stated in the IPO prospectus

Reading the filings

Arithmetic on what Amprius Technologies, Inc. has disclosed, written the way a desk would read it. These are observations, not a rating. Nothing here scores the vehicle or implies a view on it.

  • Trading at a discount to trust

    At $8.59 the shares change hands 14.21% below the $10.01 they can be redeemed for. A holder buying here is paid that spread to carry deadline and redemption risk until the vote, and the trust keeps accreting underneath it.

  • Trust versus the $10 unit

    The trust holds $10.01 per public share, 0.1% above the $10.00 the units were sold at. That spread is accrued interest on the trust and, where the charter provides for it, sponsor contributions paid in to buy more time. It is the floor a public shareholder can redeem at, not a valuation of the business.

  • Sponsor record

    Kensington has launched 9 vehicles. Of the 8 that have resolved, 8 closed a combination and 0 liquidated, a 100% completion rate. A sponsor's record is not a forecast, but it does tell you whether the team has taken a deal across the line before.

  • Underwriting

    UBS led the offering. It has been named on 59 SPAC IPOs, book-running 50 of them, and 71.7% of its resolved vehicles closed a deal. The syndicate has no control over whether a sponsor finds a target, but the quality of the book at pricing shapes who ends up holding the units.

How busy it has been

Filings per month since the first one. A vehicle that has gone quiet with a deadline ahead is a different proposition from one that is still working.

331702021-122026-10

501 filings in all. 13 in the last three months, against a busiest month of 33.

News on Amprius Technologies, Inc.

Last 90 days

SEC filing history

Free tier: filings older than 24 hours
  • S-3ASR

    S-3ASR

    Accession 0001104659-26-115105

    Oct 9, 2026

    22d ago

    View on EDGAR ↗
  • 8-K

    Entry into a material definitive agreement

    Items 1.01, 9.01 · Accession 0001899287-26-000065

    Sep 26, 2026

    1mo ago

    View on EDGAR ↗
  • 4

    Statement of changes in beneficial ownership

    Accession 0001476220-26-000034

    Aug 25, 2026

    2mo ago

    View on EDGAR ↗
  • 144

    144 filing

    Accession 0001476220-26-000033

    Aug 25, 2026

    2mo ago

    View on EDGAR ↗
  • 4

    Statement of changes in beneficial ownership

    Accession 0001940928-26-000024

    Aug 25, 2026

    2mo ago

    View on EDGAR ↗
  • 144

    144 filing

    Accession 0001940928-26-000023

    Aug 25, 2026

    2mo ago

    View on EDGAR ↗
  • 4

    Statement of changes in beneficial ownership

    Accession 0002067233-26-000019

    Aug 25, 2026

    2mo ago

    View on EDGAR ↗
  • 144

    144 filing

    Accession 0002067233-26-000018

    Aug 25, 2026

    2mo ago

    View on EDGAR ↗
  • 144

    144 filing

    Accession 0001950047-26-008579

    Aug 24, 2026

    2mo ago

    View on EDGAR ↗
  • 8-K

    Entry into a material definitive agreement

    Items 1.01, 2.03, 9.01 · Accession 0001899287-26-000062

    Aug 13, 2026

    2mo ago

    View on EDGAR ↗
  • SCHEDULE 13G/A

    Amended beneficial ownership report (passive)

    Accession 0001595888-26-000085

    Aug 10, 2026

    2mo ago

    View on EDGAR ↗
  • 10-Q

    Quarterly report

    Accession 0001899287-26-000059

    Aug 6, 2026

    2mo ago

    View on EDGAR ↗
  • 8-K

    Current report

    Items 2.02, 9.01 · Accession 0001899287-26-000056

    Aug 4, 2026

    2mo ago

    View on EDGAR ↗
  • SCHEDULE 13G/A

    Amended beneficial ownership report (passive)

    Accession 0002012383-26-002178

    Jul 27, 2026

    3mo ago

    View on EDGAR ↗
  • 8-K

    Submission of matters to a vote of security holders

    Item 5.07 · Accession 0001899287-26-000053

    Jun 17, 2026

    4mo ago

    View on EDGAR ↗
  • 4

    Statement of changes in beneficial ownership

    Accession 0001230569-26-000005

    Jun 16, 2026

    4mo ago

    View on EDGAR ↗
  • 4

    Statement of changes in beneficial ownership

    Accession 0001517394-26-000003

    Jun 16, 2026

    4mo ago

    View on EDGAR ↗
  • 4

    Statement of changes in beneficial ownership

    Accession 0001045434-26-000009

    Jun 16, 2026

    4mo ago

    View on EDGAR ↗
  • 4

    Statement of changes in beneficial ownership

    Accession 0001296381-26-000005

    Jun 16, 2026

    4mo ago

    View on EDGAR ↗
  • 4

    Statement of changes in beneficial ownership

    Accession 0001045434-26-000007

    Jun 11, 2026

    4mo ago

    View on EDGAR ↗
  • 144

    144 filing

    Accession 0001949846-26-000360

    Jun 8, 2026

    4mo ago

    View on EDGAR ↗
  • 4

    Statement of changes in beneficial ownership

    Accession 0002067233-26-000015

    Jun 5, 2026

    4mo ago

    View on EDGAR ↗
  • 144

    144 filing

    Accession 0001950047-26-005630

    Jun 4, 2026

    4mo ago

    View on EDGAR ↗
  • 4

    Statement of changes in beneficial ownership

    Accession 0001476220-26-000029

    May 28, 2026

    5mo ago

    View on EDGAR ↗
  • 144

    144 filing

    Accession 0001476220-26-000028

    May 28, 2026

    5mo ago

    View on EDGAR ↗
  • 4

    Statement of changes in beneficial ownership

    Accession 0002067233-26-000012

    May 28, 2026

    5mo ago

    View on EDGAR ↗
  • 144

    144 filing

    Accession 0002067233-26-000010

    May 28, 2026

    5mo ago

    View on EDGAR ↗
  • 4

    Statement of changes in beneficial ownership

    Accession 0001940928-26-000020

    May 28, 2026

    5mo ago

    View on EDGAR ↗
  • 144

    144 filing

    Accession 0001940928-26-000018

    May 28, 2026

    5mo ago

    View on EDGAR ↗
  • 4

    Statement of changes in beneficial ownership

    Accession 0001045434-26-000005

    May 28, 2026

    5mo ago

    View on EDGAR ↗

Pro

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  • Deadline calendar out to 12 months
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Amprius Technologies, Inc.: questions answered

What is Amprius Technologies, Inc. (AMPX)?

Amprius Technologies, Inc. is a special purpose acquisition company incorporated in Delaware and registered with the SEC under CIK 0001899287. It completed its initial public offering in Mar 2022, raising $230M in gross proceeds and listing on NYSE. Class A shares trade under the ticker AMPX, warrants under AMPX-WT on NYSE. The vehicle is sponsored by Kensington through Kensington Capital Sponsor IV LLC. The mandate targets media & entertainment. Business combination closed; the company trades under a new ticker.

How much does Amprius Technologies, Inc. hold in trust?

Approximately $230,294,899, or about $10.01 per public share, as at the most recent filing on record. Trust balances move: shareholders redeem at extension votes and at the combination vote, and sponsors pay contributions in to extend. Treat the figure as a point-in-time disclosure, not a running balance.

When must Amprius Technologies, Inc. complete a merger?

No combination deadline appears in the filings we have indexed. The date is stated in the charter and repeated in each quarterly report; where our parser could not establish it with confidence we leave it blank rather than infer one.

What happens if Amprius Technologies, Inc. does not find a target in time?

The charter requires the vehicle to redeem 100% of the public shares and return the trust, pro rata, to public shareholders. That is the mechanism working as designed rather than a default. Founder shares and warrants are worthless in that outcome, which is why the sponsor's incentive is to get a deal done or to buy more time. Across the market, deadline lapsed without a deal; trust returned to public shareholders.

Can I redeem shares in Amprius Technologies, Inc., and at what price?

Public shareholders may elect to redeem in connection with a combination vote and at each extension vote, at the pro-rata trust value on the relevant record date, most recently disclosed at about $10.01 per share. Redemption is a right attached to the public shares only; warrants and rights carry no claim on the trust. The mechanics and the deadline for electing are set out in the proxy statement for the vote in question.

What tickers does Amprius Technologies, Inc. trade under?

Class A shares trade as AMPX on NYSE, and the warrants as AMPX-WT. Units trade first and separate into their component securities roughly 52 days after the IPO; only the Class A shares carry the redemption right against the trust.

Is the trust value the same as the share price for Amprius Technologies, Inc.?

No, and the gap between them is the whole trade. Trust per share is a disclosed, contractual figure of $10.01, being what a redeeming holder receives. The market price is whatever the shares change hands at: most recently $8.59, a discount of 14.21% to the redemption value. Quotes on this site are delayed and indicative; confirm on your own venue before trading.

Who sponsors Amprius Technologies, Inc., and what is their track record?

Kensington Capital Sponsor IV LLC is the sponsor entity, part of the Kensington franchise. That franchise has launched 9 vehicles in total, of which 8 closed a combination and 0 liquidated, a 100% completion rate on resolved vehicles. Named principals: Justin Mirro.

Which banks underwrote the Amprius Technologies, Inc. IPO?

UBS, Stifel, Robert W. Baird &, Drexel Hamilton. UBS and Stifel were credited as book-running managers on the cover. Syndicate membership and role are read from the prospectus cover and the underwriting section.

Is Amprius Technologies, Inc. tradeable, and where?

Yes. AMPX returned a live quote of $8.59 on NYSE. Quotes here are delayed and refreshed on a schedule rather than streamed, so treat the figure as indicative and confirm on your own venue. Units and warrants trade under their own symbols and are quoted separately.

Is Amprius Technologies, Inc. a good investment?

That is not a question this site answers. Amprius Technologies, Inc. is covered here as reference data: what the company filed, when it filed it, and what the numbers in those filings say. The Edge, FOMO and Potential scores on this page are derived measures with a published formula, not ratings of investment merit: they describe the setup, and every component is shown so you can take them apart. We publish no price targets and no recommendations, and nothing here should be read as advice. The figures are a starting point for your own work, and each one carries the accession number of the filing it came from.

Where does this Amprius Technologies, Inc. data come from?

Filings Amprius Technologies, Inc. submitted to the SEC under CIK 0001899287: the registration statement and final prospectus for the structure, quarterly and annual reports for the trust, current reports and proxy statements for deals, votes and extensions. Trust economics are taken from the registrant's own XBRL tags rather than parsed from prose, which is why they are exact. Every filing in the history above is listed with its accession number, which identifies the document uniquely on EDGAR; Pro accounts open it directly from the row.

Compiled by the SPACListing research desk

Last reconciled Nov 1, 2026

Every figure on this page is read from documents the registrants filed with the U.S. Securities and Exchange Commission, principally the IPO prospectus (Form 424B4), quarterly and annual reports, current reports and proxy statements, the registrant's own XBRL tags for trust economics. Nothing is sourced from press coverage, from the companies themselves, or from a third-party aggregator. Where a filing does not disclose something, the field is left blank rather than estimated.

Read the full methodology · What is in the dataset · Report a correction

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The context around this vehicle: who else the sponsor has launched, which banks priced it, and where it sits in the wider market.