# EDGAR Filing Document

**Accession Number:** 0001852016
**File Stem:** 0001193125-26-200286
**Filing Date:** 2026-5
**Character Count:** 12135
**Document Hash:** 08de6816ca5ba1bdc1a2a7ebbee5b81a
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-200286.hdr.sgml**: 20260501

**ACCESSION NUMBER**: 0001193125-26-200286

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 13

**CONFORMED PERIOD OF REPORT**: 20260427

**ITEM INFORMATION**: Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year

**ITEM INFORMATION**: Submission of Matters to a Vote of Security Holders

**ITEM INFORMATION**: Financial Statements and Exhibits

**FILED AS OF DATE**: 20260501

**DATE AS OF CHANGE**: 20260501

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** AltEnergy Acquisition Corp
- **CENTRAL INDEX KEY:** 0001852016
- **STANDARD INDUSTRIAL CLASSIFICATION:** MOTOR VEHICLE PARTS & ACCESSORIES [3714]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 862157013
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-40984
- **FILM NUMBER:** 26930297

**BUSINESS ADDRESS:**
- **STREET 1:** 137 ROWAYTON AVENUE
- **STREET 2:** SUITE 400
- **CITY:** ROWAYTON
- **STATE:** CT
- **ZIP:** 06853
- **BUSINESS PHONE:** 2032953343

**MAIL ADDRESS:**
- **STREET 1:** 137 ROWAYTON AVENUE
- **STREET 2:** SUITE 400
- **CITY:** ROWAYTON
- **STATE:** CT
- **ZIP:** 06853

?xml version='1.0' encoding='ASCII'? 8-K

### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### Washington, D.C. 20549

### FORM 8-K

#### 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 27, 2026

## AltEnergy Acquisition Corp.

#### (Exact name of registrant as specified in its charter)

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| | | |
|:---|:---|:---|
| **Delaware** | **001-40984** | **86-2157013** |
| **(State or other jurisdiction**<br>**Identification No.)** | **(Commission**<br>**File Number)** | **(I.R.S. Employer of**<br>**incorporation)** |

---

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| | |
|:---|:---|
| **600 Lexington Avenue**<br>**9<sup>th</sup> Floor**<br>**New York, NY** | **10022** |
| **(Address of principal executive offices)** | **(Zip Code)** |

---

(203) 299-1400

#### (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 communications 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-commencement 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**<br>**Symbol(s)** | **Name of each exchange**<br>**on which registered** |
| Units, each consisting of one share of Class A common stock and one- half of one Warrant | AEAEU | OTC Pink Open Market |
| Class A common stock, par value $0.0001 per share | AEAE | OTC Pink Open Market |
| Warrants, each whole warrant exercisable for one share of Class A common stock at an exercise price of $11.50 | AEAEW | OTC Pink Open Market |

---

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).

Emerging growth company ☒

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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| | |
|:---|:---|
| **Item 5.03.** | **Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year.** |

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The information disclosed in Item 5.07 of this Current Report on Form 8-K under the heading "Proposal 1" is incorporated by reference into this Item 5.03 to the extent required.

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| | |
|:---|:---|
| **Item 5.07.** | **Submission of Matters to a Vote of Security Holders.** |

---

On April 27, 2026, AltEnergy Acquisition Corp., a Delaware corporation (the "<u>Company</u>") held a special meeting of stockholders (the "<u>Special Meeting</u>"). As of March 20, 2026, the record date of the Special Meeting, there were 6,266,197 issued and outstanding shares of common stock of the Company, par value $0.0001 per share (the "<u>Common Stock</u>") comprised of 6,016,197 shares of the Company's Class A common stock, par value $0.0001 per share ("<u>Class</u> <u>A Shares</u>"), and 250,000 shares of the Company's Class B common stock, par value $0.0001 per share. At the Special Meeting, approximately 91.8% of the total shares of Common Stock outstanding as of the record date were present in person or by proxy, which constituted a quorum. A summary of the voting results at the Special Meeting for each of the proposals is set forth below.

<u>Proposal 1</u> 

The Company's stockholders approved the proposal to file an amendment to the Company's Amended and Restated Certificate of Incorporation with the Secretary of State of Delaware to extend the date by which the Company must (1) consummate a merger, capital stock exchange, asset acquisition, stock purchase, reorganization or similar business combination with one or more businesses or (2) cease its operations except for the purpose of winding up if it fails to complete such initial business combination, and redeem all of the Class A Shares included as part of the units sold in the Company's initial public offering that was consummated on November 2, 2021 (the "<u>IPO</u>"), from May 1, 2026, to May 3, 2027 (the "<u>Extended Date</u>") (such proposal, the "<u>Extension</u>"). The voting results for such proposal were as follows:

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| | | |
|:---|:---|:---|
| **For** | **Against** | **Abstain** |
| **5,750,010** | **0** | **0** |

---

<u>Proposal 2</u> 

The proposal to adjourn the Special Meeting to a later date or dates, if necessary or convenient, to permit further solicitation and vote of proxies in the event that there were insufficient votes for, or otherwise in connection with, the approval of the Extension and the Redemption Limitation Amendment, was not presented at the Special Meeting as the Extension Proposal received a sufficient number of votes for approval.

On April 29, 2026, to effectuate the Extension, the Company filed an amendment to the Certificate of Incorporation (the "Amendment") with the Secretary of State of the State of Delaware. The foregoing description of the Amendment does not purport to be complete and is qualified in its entirety by the terms of the Amendment, a copy of which is attached hereto as Exhibit 3.1 and incorporated herein by reference.

Stockholders holding 2,719 Class A Shares exercised their right to redeem such shares for a pro rata portion of the funds in the Company's trust account ("<u>Trust Account</u>") in connection with the Extension. As a result, $32,970.61 (approximately $12.126 per share) will be removed from the Trust Account to pay such holders.

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| | |
|:---|:---|
| **Item 9.01.** | **Financial Statements and Exhibits.** |

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(d) Exhibits.

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| | |
|:---|:---|
| Exhibit<br>No. | Description |
| 3.1 | [Fourth Amendment to the Amended and Restated Certificate of Incorporation of AltEnergy Acquisition Corp.](d129532dex31.htm) |
| 104 | Cover Page Interactive Data File (embedded within the Inline XBRL document). |

---

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#### SIGNATURE
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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| | |
|:---|:---|
| **ALTENERGY ACQUISITION CORP.** | **ALTENERGY ACQUISITION CORP.** |
| By: | /s/ Russell Stidolph |
| Name: | Russell Stidolph |
| Title: | Chief Executive Officer |

---

Date: May 1, 2026

## Exhibit 3.1

**Exhibit 3.1** 

**FOURTH AMENDMENT** 

**TO THE** 

**AMENDED AND RESTATED** 

**CERTIFICATE OF INCORPORATION** 

**OF** 

**ALTENERGY ACQUISITION CORP.** 

**(Pursuant to Section 242 of the** 

**Delaware General Corporation Law)** 

The undersigned, being a duly authorized officer of ALTENERGY ACQUISITION CORP. (the "Corporation"), a corporation organized and existing under the laws of the State of Delaware, does hereby certify as follows:

1. The name of the Corporation is AltEnergy Acquisition Corp.

2. The Corporation's Certificate of Incorporation was filed in the office of the Secretary of State of the State of Delaware on February 9, 2021. An Amended and Restated Certificate of Incorporation was filed in the office of the Secretary of State of the State of Delaware on October 28, 2021 and was further updated pursuant to a Certificate of Correction filed in the office of the Secretary of State of the State of Delaware on March 20, 2023 (as amended from time to time, the "Amended and Restated Certificate of Incorporation").

2. This Fourth Amendment to the Amended and Restated Certificate of Incorporation amends the Amended and Restated Certificate of Incorporation.

3. This Fourth Amendment to the Amended and Restated Certificate of Incorporation was duly adopted by the affirmative vote of the holders of at least 65% of the stock entitled to vote at a meeting of stockholders in accordance with Article VII of the Amended and Restated Certificate of Incorporation and the provisions of Section 242 of the General Corporation Law of the State of Delaware, as amended from time to time (the "DGCL").

4. The text of Section 8.1(b) of Article VIII is hereby amended to read in full as follows:

"(b) Immediately after the Offering, a certain amount of the net offering proceeds received by the Corporation in the Offering (including the proceeds of any exercise of the underwriters' over-allotment option) and certain other amounts specified in the Corporation's registration statement on Form S-1, as initially filed with the U.S. Securities and Exchange Commission (the "SEC") on August 6, 2021 (the "Registration Statement"), shall be deposited in a trust account (the "Trust Account"), established for the benefit of the Public Stockholders (as defined below) pursuant to a trust agreement described in the Registration Statement. Except for the withdrawal of interest to pay franchise and income taxes, none of the funds held in the Trust Account (including the interest earned on the funds held in the Trust Account) will be released from the Trust Account until the earliest to occur of (i) the completion of the initial Business Combination, (ii) the redemption of 100% of the Offering Shares (as defined below) if the Corporation is unable to complete its initial Business Combination on or before May 3, 2027 (the "Redemption Date") , and (iii) the redemption of shares in connection with a vote seeking to amend any provisions of the Amended and Restated Certificate relating to stockholders' rights or pre-initial Business Combination activity (as described in Section 8.7). Holders of shares of Common Stock included as part of the units sold in the Offering (the "Offering Shares") (whether such Offering Shares were purchased in the Offering or in the secondary market following the Offering and whether or not such holders are the Sponsor or officers or directors of the Corporation, or affiliates of any of the foregoing) are referred to herein as "Public Stockholders."

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IN WITNESS WHEREOF, AltEnergy Acquisition Corp. has caused this Amendment to the Amended and Restated Certificate to be duly executed in its name and on its behalf by an authorized officer as of this 29th day of April, 2026.

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| | |
|:---|:---|
| By: | /s/ Russell Stidolph |
| Russell Stidolph | Russell Stidolph |
| Chief Executive Officer | Chief Executive Officer |

---