# EDGAR Filing Document

**Accession Number:** 0001843724
**File Stem:** 0001628280-26-025865
**Filing Date:** 2026-4
**Character Count:** 10457
**Document Hash:** 02a9f8373082b0c69df00d5581e4e52a
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001628280-26-025865.hdr.sgml**: 20260417

**ACCESSION NUMBER**: 0001628280-26-025865

**CONFORMED SUBMISSION TYPE**: 8-K/A

**PUBLIC DOCUMENT COUNT**: 13

**CONFORMED PERIOD OF REPORT**: 20260410

**ITEM INFORMATION**: Changes in Registrant's Certifying Accountant

**ITEM INFORMATION**: Financial Statements and Exhibits

**FILED AS OF DATE**: 20260417

**DATE AS OF CHANGE**: 20260417

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** LanzaTech Global, Inc.
- **CENTRAL INDEX KEY:** 0001843724
- **STANDARD INDUSTRIAL CLASSIFICATION:** INDUSTRIAL ORGANIC CHEMICALS [2860]
- **ORGANIZATION NAME:** 08 Industrial Applications and Services
- **EIN:** 861763050
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-40282
- **FILM NUMBER:** 26872682

**BUSINESS ADDRESS:**
- **STREET 1:** 8045 LAMON AVENUE
- **STREET 2:** SUITE 400
- **CITY:** SKOKIE
- **STATE:** IL
- **ZIP:** 60077
- **BUSINESS PHONE:** 847-324-2400

**MAIL ADDRESS:**
- **STREET 1:** 8045 LAMON AVENUE
- **STREET 2:** SUITE 400
- **CITY:** SKOKIE
- **STATE:** IL
- **ZIP:** 60077

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** AMCI Acquisition Corp. II
- **DATE OF NAME CHANGE:** 20210201

?xml version='1.0' encoding='ASCII'? amci-20260410

**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

**Washington, D.C. 20549**

**FORM 8-K/A** 

**CURRENT REPORT**

**PURSUANT TO SECTION 13 OR 15(D) OF THE** 

**SECURITIES EXCHANGE ACT OF 1934**

Date of Report (Date of earliest event reported): April 10, 2026

**LanzaTech Global, Inc.**

(Exact name of registrant as specified in its charter)

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| | | |
|:---|:---|:---|
| **Delaware** | **001-40282** | **92-2018969** |
| (State or other jurisdiction<br>of incorporation) | (Commission File Number) | (I.R.S. Employer<br>Identification No.) |

---

8045 Lamon Avenue, Suite 400Skokie, Illinois 60077 <br> (Address of principal executive offices) (Zip Code)

(847) 324-2400

(Registrant's telephone number, including area code)

**Not Applicable**

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communication pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencements communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

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| | | |
|:---|:---|:---|
| **Title of each class** | **Trading Symbols** | **Name of each exchange on which registered** |
| **Common Stock, par value $0.0000001 per share** | **LNZA** | **The Nasdaq Stock Market LLC** |
| **Warrants to purchase Common Stock** | **LNZAW** | **The Nasdaq Stock Market LLC** |

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☐ Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.

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**EXPLANATORY NOTE**

This Amended Current Report on Form 8-K/A (this "Form 8-K/A") amends the current report on Form 8-K that was filed by LanzaTech Global, Inc. (the "Company") with the U.S. Securities and Exchange Commission (the "SEC") on April 16, 2026, reporting the Company's decision to: (a) dismiss Deloitte & Touche LLP ("Deloitte") as its independent registered public accounting firm; and (b) engage BDO USA, P.C. ("BDO") as its independent registered public accounting firm for the fiscal year ending December 31, 2026. The Company provided Deloitte with a copy of the disclosures made below in Item 4.01 and requested that Deloitte furnish the Company with a letter addressed to the Securities and Exchange Commission stating whether or not it agrees with the statements made below in Item 4.01. This Form 8-K/A is being filed to provide a copy of the letter from Deloitte, dated April 17, 2026, which is included with this Form 8-K/A as Exhibit 16.1.

**Item 4.01 Changes in Registrant's Certifying Accountant.**

&nbsp;&nbsp;&nbsp;&nbsp;***(a) Dismissal of Independent Registered Public Accounting Firm***

On April 10, 2026, upon the recommendation and approval of the Audit Committee of the Board of Directors (the "Audit Committee"), the Board of Directors of LanzaTech Global, Inc. ratified and approved the dismissal of Deloitte as the Company's independent registered public accounting firm, effective April 10, 2026.

Deloitte's reports on the Company's consolidated financial statements for the fiscal years ended December 31, 2025 and 2024 did not contain an adverse opinion or disclaimer of opinion and were not qualified or modified as to uncertainty, audit scope, or accounting principles, except that each report contained an explanatory paragraph regarding substantial doubt about the Company's ability to continue as a going concern.

During the Company's fiscal years ended December 31, 2025 and 2024, and the subsequent interim period through April 10, 2026, there were no disagreements (as defined in Item 304(a)(1)(iv) of Regulation S-K and its related instructions) between the Company and Deloitte on any matter of accounting principles or practices, financial statement disclosure, or auditing scope or procedure, which, if not resolved to the satisfaction of Deloitte, would have caused Deloitte to make reference to the subject matter of the disagreement in its reports on the Company's consolidated financial statements.

During the Company's fiscal years ended December 31, 2025 and 2024, and the subsequent interim period through April 10, 2026, there were no "reportable events" (as defined in Item 304(a)(1)(v) of Regulation S-K), except as previously disclosed in the Company's Annual Report on Form 10-K for the years ended December 31, 2024, where the Company identified material weaknesses in internal control over financial reporting related to (i) the accounting for complex transactions and estimates requiring significant judgment and (ii) revenue recognition, and in the Company's Annual Report on Form 10-K for the year ended December 31, 2025, where the Company identified deficiencies in the Company's internal control over financial reporting that constituted material weaknesses associated with multiple components of the Committee of Sponsoring Organizations of the Treadway Commission Internal Control - Integrated Framework, including control activities, monitoring, risk assessment, and information and communication. The Company and the Audit Committee have discussed the material weaknesses with Deloitte and have authorized them to respond fully to inquiries of the successor independent registered public accounting firm concerning such material weaknesses. Such material weaknesses did not result in any restatement of the Company's financial statements and did not give rise to any disagreement between the Company and Deloitte.

The Company provided Deloitte with a copy of the above disclosures and requested that Deloitte furnish the Company with a letter addressed to the SEC stating whether they agree with the statements made by the Company in such disclosures and, if not, stating the respects, if any, in which they do not agree with such statements. Attached as Exhibit 16.1 is a copy of Deloitte's letter, dated April 17, 2026 stating that they are in agreement with the statements above.

&nbsp;&nbsp;&nbsp;&nbsp;***(b) Engagement of New Independent Registered Public Accounting Firm***

On April 10, 2026, upon the recommendation and approval of the Audit Committee, the Board of Directors of the Company ratified and approved the engagement of BDO as the Company's independent registered public accounting firm for the fiscal year ending December 31, 2026, effective April 10, 2026.

During the Company's fiscal years ended December 31, 2025 and 2024, and the subsequent interim period through April 10, 2026, neither the Company nor anyone on its behalf consulted with BDO regarding either:

&nbsp;&nbsp;&nbsp;&nbsp;(i) the application of accounting principles to a specified transaction, either completed or proposed, or the type of audit opinion that might be rendered on the Company's consolidated financial statements, and neither a written report nor oral

------

advice was provided to the Company that BDO concluded was an important factor considered by the Company in reaching a decision as to any accounting, auditing, or financial reporting issue; or

&nbsp;&nbsp;&nbsp;&nbsp;(ii) any matter that was the subject of a disagreement (as defined in Item 304(a)(1)(iv) of Regulation S-K and its related instructions) or a reportable event (as described in Item 304(a)(1)(v) of Regulation S-K).

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**Item 9.01 Financial Statements and Exhibits.**

(d) Exhibits

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| | |
|:---|:---|
| **Exhibit No.** | **Description** |
| **16.1** | [Letter from Deloitte & Touche LLP to the Securities and Exchange Commission dated April 17, 2026](exhibit161-deloitteletter4.htm)[.](exhibit161-deloitteletter4.htm) |
| **104** | Cover Page Interactive Data File (formatted as Inline XBRL) |

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**SIGNATURES**

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

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| | | |
|:---|:---|:---|
| | **LANZATECH GLOBAL, INC.** | **LANZATECH GLOBAL, INC.** |
| Dated: April 17, 2026 | By: | /s/ Maryann Maas |
|  | Name: | Maryann Maas |
|  | Title: | Interim General Counsel |

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## Exhibit 16.1

April 17, 2026

Securities and Exchange Commission 100 F Street, N.E.

Washington, D.C. 20549-7561 Dear Sirs/Madams:

We have read Item 4.01 of LanzaTech Global, Inc.'s Form 8-K dated April 16, 2026, and we agree with the statements made therein.

Yours truly,

*DELOITTE & TOUCHE LLP*

<br>