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Amprius Technologies, Inc. filings document operating results, material events, governance matters and capital-structure disclosures for a public battery technology company. Its 8-K reports include quarterly and annual financial-result releases, material agreement updates, auditor changes, lease-related matters, and equity offering activity.
Amprius disclosure records also cover proxy and shareholder voting matters, emerging growth company status, common stock, redeemable warrants, and board and executive compensation topics. These filings provide the formal record for the company's silicon-anode battery business, security structure, financing activity, risk disclosures and corporate governance practices.
Amprius Technologies filed an amendment to update details on its recently completed warrant-for-share exchange. On May 18 and May 19, 2026, the company issued an aggregate of 2,726,631 shares of common stock to institutional holders in exchange for 7,128,458 public warrants, which were surrendered and cancelled.
The shares were issued as unregistered securities in private transactions relying on Section 4(a)(2) of the Securities Act, meaning they cannot be freely resold in the United States without an effective registration statement or a valid exemption.
Amprius Technologies, Inc. entered into Warrant Exchange Agreements with certain institutional holders of its public warrants. These holders agreed to exchange an aggregate of 7,128,458 public warrants, each with a strike price of $11.50 per share, for shares of common stock.
The number of shares each holder receives will be based on a formula using the four-day average volume-weighted average price of the common stock, adjusted by adding $0.35 and subtracting the exercise price, then dividing by the same average price. Closing of the exchanges is expected on May 18, 2026, subject to customary conditions, and the unregistered issuance of these shares relies on the Section 4(a)(2) exemption under the Securities Act.
Stepien Thomas M reported acquisition or exercise transactions in this Form 4 filing.
Amprius Technologies, Inc. reported that Chief Executive Officer Thomas M. Stepien received a grant of 200,000 shares of common stock at a price of $0.00 per share as a compensation-related award. Following this grant, he directly holds 760,000 shares of Amprius common stock.
The amended filing clarifies the vesting schedule for the underlying restricted stock units. 2/16 of the shares will vest on May 20, 2026, and 1/16 will vest quarterly on each August 20, November 20, February 20, and May 20, subject to his continued service, until the award is fully vested on November 20, 2029.
Amprius Technologies reported strong Q1 2026 revenue growth but continued losses and heavy cash use. Revenue rose to $28.5 million from $11.3 million, driven by higher SiCore battery sales and new customers, lifting gross margin to 20% from a negative margin a year earlier. Operating expenses increased as the company expanded R&D and administrative functions, and Amprius posted a net loss of $5.0 million, improved from a $9.4 million loss.
Cash and cash equivalents were $62.4 million as of March 31, 2026, but operating cash outflow was $37.3 million, largely due to a $20.0 million payment to terminate the Brighton, Colorado plant lease. The company now relies on a global contract manufacturing network and is expanding its Fremont pilot line, supported by an $18.1 million U.S. Defense Innovation Unit contract and related government grant income. Revenue remains concentrated, including sizable shipments into EMEA and Ukraine, and the business continues to face global macro, defense and trade risks.
Amprius Technologies, Inc. director Sun Kang received an equity compensation grant of 6,250 shares of common stock in the form of restricted stock units at a price of $0.00 per share. This is a grant/award acquisition rather than an open-market purchase.
Each restricted stock unit represents the right to receive one share of common stock, subject to vesting. One-eighth of the award will vest on May 20, 2026, with additional vesting each quarter on August 20, November 20, February 20 and May 20 until the grant is fully vested on February 20, 2028, assuming continued service. After this grant, Kang directly holds 1,348,650 shares, including 1,165,635 restricted stock units.
Amprius Technologies reported strong growth for Q1 2026, with revenue of $28.5 million, up 2.5x from $11.3 million a year earlier, and record quarterly sales. GAAP gross margin reached 20%, turning from a negative margin of (21%) in Q1 2025 as gross profit rose to $5.7 million.
The company still posted a net loss of $5.0 million, but this improved 46% from $9.4 million, with net loss per share narrowing to $0.04 from $0.08. Non-GAAP Adjusted EBITDA was ($1.8) million, a $3.4 million year-over-year improvement.
Management raised its 2026 revenue outlook to at least $130 million and reiterated targets for full-year net loss below $8.0 million, net loss per share under $0.06, Adjusted EBITDA of at least $4.0 million, and capital expenditure under $10.0 million. Business highlights included a $21.0 million light electric vehicle purchase order and expansion of U.S. defense and contract manufacturing relationships.
Amprius Technologies, Inc. reports its Annual Report on Form 10-K for the fiscal year ended December 31, 2025. The company describes commercial production and customer validation for its silicon-anode batteries, noting over 4.2 million battery cells shipped through December 31, 2025 and more than 500 customer engagements since inception. It reports access to annual SiCore production exceeding 2.0 GWh via contract manufacturers, shipped SiMaxx from its Fremont facility, and plans to expand a pilot SiCore line to 10 MWh. Financial and operational items include a $14.8M DIU contract, $19.1M impairment charges related to a Colorado lease, and a $20.0M lease-termination payment agreed on January 30, 2026. The filing highlights intellectual property (86 patents) and ongoing risks tied to scale-up, supply-chain reliance, NDAA compliance, and safety testing.
Amprius Technologies, Inc. will hold its 2026 annual stockholder meeting virtually on June 11, 2026 at 10:00 a.m. local time. Stockholders will vote on electing two Class I directors, Kathleen Bayless and CEO Thomas M. Stepien, to serve until the 2029 meeting, and on ratifying Deloitte & Touche LLP as independent registered public accounting firm for the year ending December 31, 2026.
The record date is April 13, 2026, with 140,807,061 common shares entitled to one vote each. The proxy describes the company’s staggered, majority-independent board, the planned retirement of director Wen Hsieh, committee structures, director pay, and 2025 compensation for key executives including Stepien, CFO Ricardo C. Rodriguez, and Executive Advisor Kang Sun. It also explains the recent transition of auditor from BDO USA, P.C. to Deloitte.
Jane Street Group, LLC reports shared beneficial ownership of 7,014,784 shares (5.1%) of Amprius Technologies, Inc. The filing shows shared voting and dispositive power over those shares. Subsidiaries listed include Jane Street Capital, LLC (3,780,489 shares, 2.8%) and Jane Street Global Trading, LLC (3,234,295 shares, 2.4%).
The disclosure is a Schedule 13G ownership filing dated 04/28/2026, signed by Jeremy Kahn as authorized signatory.
Amprius Technologies, Inc. is changing its independent auditor. The audit committee approved the engagement of Deloitte & Touche LLP to audit the company’s consolidated financial statements for the year ending December 31, 2026, effective April 21, 2026.
On April 17, 2026, the audit committee dismissed BDO USA, P.C., which had audited the company for the years ended December 31, 2025 and 2024. BDO’s prior reports did not contain adverse or disclaimed opinions and were not qualified or modified as to audit scope or accounting principles, and the company states there were no disagreements and no reportable events under Regulation S-K Item 304.