UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 12b-25

NOTIFICATION OF LATE FILING

(Check one):	☐  Form 10-K     ☐  Form 20-F     ☐  Form 11-K     ☒  Form 10-Q ☐  Form 10-D     ☐  Form N-CEN     ☐  Form N-CSR
	For Period Ended: September 30, 2021
	☐  Transition Report on Form 10-K
	☐  Transition Report on Form 20-F
	☐  Transition Report on Form 11-K
	☐  Transition Report on Form 10-Q
	For the Transition Period Ended:

Read Instruction (on back page) Before Preparing Form. Please Print or Type.

Nothing in this form shall be construed to imply that the Commission has verified any information contained herein.

If the notification relates to a portion of the filing checked above, identify the Item(s) to which the notification relates:

PART I — REGISTRANT INFORMATION

Black Mountain Acquisition Corp.

Full Name of Registrant

N/A

Former Name if Applicable

425 Houston Street, Suite 400

Address of Principal Executive Office (Street and Number)

Fort Worth, TX 76102

City, State and Zip Code

PART II — RULES 12b-25(b) AND (c)

If the subject report could not be filed without unreasonable effort or expense and the registrant seeks relief pursuant to Rule 12b-25(b), the following should be completed. (Check box if appropriate)

☒	(a)	The reason described in reasonable detail in Part III of this form could not be eliminated without unreasonable effort or expense;
	(b)	The subject annual report, semi-annual report, transition report on Form 10-K, Form 20-F, Form 11-K, Form N-CEN or Form N-CSR, or portion thereof, will be filed on or before the fifteenth calendar day following the prescribed due date; or the subject quarterly report or transition report on Form 10-Q or subject distribution report on Form 10-D, or portion thereof, will be filed on or before the fifth calendar day following the prescribed due date; and
	(c)	The accountant’s statement or other exhibit required by Rule 12b-25(c) has been attached if applicable.

PART III — NARRATIVE

State below in reasonable detail why Forms 10-K, 20-F, 11-K, 10-Q, 10-D, N-CEN, N-CSR, or the transition report or portion thereof, could not be filed within the prescribed time period.

Black Mountain Acquisition Corp. (the “Registrant”) is unable, without unreasonable effort or expense, to file its Quarterly Report on Form 10-Q for the period ended September 30, 2021 (the “Quarterly Report”) by the November 29, 2021, filing date applicable to smaller reporting companies due to a delay experienced by the Registrant in completing its financial statements and other disclosures in the Quarterly Report. As a result, the Registrant is still in the process of compiling required information to complete the Quarterly Report and its independent registered public accounting firm requires additional time to complete its review of the financial statements for the quarter ended September 30, 2021, to be incorporated in the Quarterly Report. The Registrant anticipates that it will file the Quarterly Report no later than the fifth calendar day following the prescribed filing date.

PART IV — OTHER INFORMATION

(1)	Name and telephone number of person to contact in regard to this notification
	Jacob Smith	817	698-9901
	(Name)	(Area Code)	(Telephone Number)
(2)	Have all other periodic reports required under Section 13 or 15(d) of the Securities Exchange Act of 1934 or Section 30 of the Investment Company Act of 1940 during the preceding 12 months or for such shorter period that the registrant was required to file such report(s) been filed? If answer is no, identify report(s).     Yes  ☒    No  ☐
(3)	Is it anticipated that any significant change in results of operations from the corresponding period for the last fiscal year will be reflected by the earnings statements to be included in the subject report or portion thereof?    Yes  ☐    No  ☒

Black Mountain Acquisition Corp.

(Name of registrant as Specified in Charter)

has caused this notification to be signed on its behalf by the undersigned hereunto duly authorized.

Date: November 29, 2021

By:	/s/ Jacob Smith
Name:	Jacob Smith
Title:	Chief Financial Officer, Chief Accounting Officer and Secretary

INSTRUCTION: The form may be signed by an executive officer of the registrant or by any other duly authorized representative. The name and title of the person signing the form shall be typed or printed beneath the signature. If the statement is signed on behalf of the registrant by an authorized representative (other than an executive officer), evidence of the representative’s authority to sign on behalf of the registrant shall be filed with the form.

ATTENTION

Intentional misstatements or omissions of fact constitute Federal Criminal Violations (See 18 U.S.C. 1001).