Document:

Exhibit 10.15

 

AMENDMENT TO REGISTRATION RIGHTS AGREEMENT

 

This Amendment to that certain
Registration Rights Agreement, dated March 16, 2021 (the “Original Agreement”), by and among Athena Technology
Acquisition Corp., a Delaware corporation (the “Company”), Athena Technology Sponsor LLC, a Delaware limited
liability company (the “Sponsor”) and certain parties listed on the signature page of the Original Agreement
under “Holders” (each such party together with the Sponsor and any person or entity who hereafter becomes a party to the Original
Agreement, a “Holder” and collectively the “Holders”), dated December 30, 2021 (this
“Amendment”), is entered into by and among the Company and the Holder (collectively, the “Parties”).
Capitalized terms used and not otherwise defined herein have the meanings set forth in the Original Agreement.

 

WHEREAS, this Amendment is
being delivered in connection with the Business Combination Agreement, dated July 6, 2021, by and among the Company, HelioMax Merger Sub,
Inc., a Delaware Corporation and Heliogen, Inc., a Delaware corporation;

 

WHEREAS, pursuant to Section
5.5 of the Original Agreement, the Original Agreement may only be amended upon the written consent of the Company and the Holders of at
least a majority in interest of the Registrable Securities at the time in question; and

 

WHEREAS, the undersigned Holders
represent the Holders of at least a majority in interest of the Registerable Securities as of December 30, 2021;

 

NOW, THEREFORE, in consideration
of the foregoing recitals, which shall constitute a part of this Amendment, and the mutual promises contained in this Amendment, and intending
to be legally bound thereby, the Parties agree as follows:

 

		1.	Certain Amendments to the Original Agreement. The Original Agreement is hereby amended as follows:

 

		a.	The definition of “Founder Shares Lock-up Period” in Section 1.1 of the Original Agreement
is hereby replaced in its entirety with the following:

 

“’Founder Shares
Lock-up Period’ shall mean, with respect to the Founder Shares, the period ending on the first to occur of (x) the 180-day
anniversary of the consummation of a Business Combination, (y) (a) with respect to 50% of such shares, when the closing price of the Class
A Common Stock reported on the NYSE (or, if the NYSE is not the principal trading market for the Class A Common Stock on such day, then
the closing or similar trading price reported on the principal national securities exchange or securities market on which the Common Stock
is then traded) (“Closing Price”) is equal to or exceeds $12.00 per share (as adjusted for stock splits, stock dividends,
reorganizations, recapitalizations and similar transactions affecting all outstanding shares of Class A Common Stock) for any 20 trading
days within any consecutive 30-trading day period following the consummation of a Business Combination, (b) with respect to 25% of such
shares, when the Closing Price is equal to or exceeds $13.50 (as adjusted for stock splits, stock dividends, reorganizations, recapitalizations
and similar transactions affecting all outstanding shares of Class A Common Stock) for any 20 trading days within any consecutive 30-trading
day period following the consummation of a Business Combination and (c) with respect to 25% of such shares, when the Closing Price is
equal to or exceeds $17.00 (as adjusted for stock splits, stock dividends, reorganizations, recapitalizations and similar transactions
affecting all outstanding shares of Class A Common Stock) for any 20 trading days within any consecutive 30-trading day period following
the consummation of a Business Combination, or (z) in any case, if, following a Business Combination, a change of control of the combined
company resulting from the consummation of the Business Combination.”

 

    

     

    

 

		b.	The definition of “Private Placement Lock-up Period” in Section 1.1 of the Original Agreement
is hereby replaced in its entirety with the following:

 

“’Private Placement
Lock-up Period’ shall mean, with respect to the Private Placement Units that are held by the initial purchasers of such
Private Placement Units or their Permitted Transferees, the Private Placement Units and the underlying shares of Common stock, private
placement warrants (the “Private Placement Warrants”) and shares of Common Stock issuable upon the exercise
of the Private Placement Warrants, and that are held by the initial purchasers of the Private Placement Units or their Permitted Transferees,
the period ending upon the expiration of the Founder Shares Lock-up Period.”

 

		2.	Effect of Amendment. The provisions of the Original Agreement, as amended by this Amendment, remain
in full force and effect. From and after the date hereof, references to “this Agreement” in the Original Agreement shall be
deemed references to the Original Agreement, as amended by this Amendment. Notwithstanding anything herein to the contrary, and for the
avoidance of doubt, in the event the Business Combination Agreement is terminated pursuant to Article IX thereof for any reason, this
Amendment shall automatically terminate and cease to be of further force and effect.

 

		3.	Entire Agreement. This Amendment and the Original Agreement, as amended pursuant to this Amendment,
and the Business Combination Agreement constitute the entire agreement and supersede all prior agreements and understandings, both written
and oral, among the Parties with respect to the subject matter hereof.

 

		4.	Miscellaneous. Sections 5.3 and 5.4 of the Original Agreement are hereby incorporated by reference
and shall apply mutatis mutandis as if set forth at length herein. Descriptive headings are for convenience only and shall not
control or affect the meaning or construction of any provision of this Amendment.

 

[Signature Page Follows]

 

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IN WITNESS WHEREOF, the undersigned have caused this
Amendment to be executed as of the date first written above.

 

	 	COMPANY:
	 	 
	 	ATHENA TECHNOLOGY ACQUISITION CORP., a Delaware corporation
	 	 
	 	By:	/s/ Phyllis W. Newhouse
	 	Name:	 Phyllis W. Newhouse
	 	Title:	Chief Executive Officer
	 	 
	 	HOLDER:
	 	 
	 	ATHENA TECHNOLOGY SPONSOR LLC, a Delaware limited liability company
	 	 
	 	By:	/s/ Phyllis W. Newhouse
	 	Name: 	 Phllis W. Newhouse
	 	Title:	Managing Member

 

 

3Exhibit 10.17

 

 

January 13, 2021 Tom Doyle

[Address]

 

Dear Tom:

 

It gives me great pleasure to
offer you employment as Head of Project Development for Heliogen, Inc. (the “Company”). You will report to me, Bill Gross,
Chief Executive Officer, Heliogen, Inc. As we discussed you will begin your employment on January 19, 2021 and the following terms and
conditions will apply to your employment:

 

		1.	Salary. Your salary will be $10,576.92 payable on a bi-weekly basis (annualized
to $275,000 per year) in accordance with the Company’s normal payroll practices. Your salary is subject to modification during your
employment in accordance with the Company’s practices, policies, or procedures.

 

		2.	Incentive Compensation. In addition to your salary, upon approval of the
Company’s Board of Directors, the Company will grant you an option to purchase 500,000 shares of the Company's common stock pursuant
to the terms provided on Attachment I (Stock Option Summary Sheet) and subject to the terms of the Company’s Stock Plan and an applicable
stock option agreement between you and the Company. You understand that incentive compensation is not guaranteed.

 

		3.	Flexible Time Off. You will be able to use Flexible Time Off (FTO) with
pay during current and subsequent years of employment in accordance with the Company’s FTO policy.

 

		4.	Benefits (Health and Welfare Plans). In addition to your compensation,
if you work, on average, 20 or more hours per week, you will be eligible to receive the benefits that are generally offered to all Company
employees effective the first of the month following your hire date. The program includes medical plans, dental plans, a vision plan,
flexible spending accounts, disability insurance, and life and accidental death and dismemberment insurance. These programs are subject
to change at the discretion of the Company.

 

		5.	401(k) Plan. You will be eligible to participate in the Company’s
401(k) Plan on your hire date. This plan is subject to change at the discretion of the Company.

 

		6.	Holidays. You will be paid for selected holidays in accordance with the
Company’s holiday schedule. This schedule is subject to change at the discretion of the Company.

 

As a condition of your employment
with the Company, you will furnish and will continue to furnish the Company all necessary documentation that will satisfy the requirements
of the Immigration Reform and Control Act of 1986.

 

 

 

130 W. UNION STREET, PASADENA, CA 91103 626-585-6900 TEL 626-535-2701
FAX

 

     

     

    

 

Your employment is expressly contingent upon the acceptable
results of a background check. Any falsification of an applicant’s employment history or educational background will result in withdrawal
of the offer and or termination of employment, if hired.

 

Your employment with the Company is at will.
This means that either you or the Company may terminate your employment at any time, with or without cause and with or without
notice. We both agree that any dispute arising with respect to your employment and the termination of that employment shall be
conclusively settled by final and binding arbitration in accordance with the arbitration procedures described in the Employee
Confidentiality and Non-Disclosure Agreement.

 

By signing this letter, you
acknowledge that the terms described in this letter, together with the Employee Confidentiality and Non-Disclosure Agreement, sets forth
the entire understanding between us and supersedes any prior representations or agreements, whether written or oral; there are no terms,
conditions, representations, warranties or covenants other than those contained herein. No term or provision of this letter may be amended
waived, released, discharged or modified except in writing, signed by you and an authorized officer of Heliogen, Inc. except that the
Company may, in its sole discretion, adjust salaries, incentive compensation, benefits, job titles, locations, duties, responsibilities,
and reporting relationships.

 

Enclosed are the following:

 

		1.	Attachment I – Stock Option Summary Sheet

		2.	Employee Confidentiality and Non-Disclosure Agreement

 

Our offer is contingent on your understanding and
acceptance of the agreements and practices referred to in this letter. Please acknowledge your acceptance of this offer of employment
on the terms indicated by signing the enclosed copy of this letter, completing the Employee Confidentiality and Non-Disclosure Agreement
and returning them to me as soon as possible. Should you have any questions, please feel free to contact me. Tom, I am personally pleased
you have chosen to accept our offer and I look forward to working with you toward our mutual success.

 

	Sincerely,	 
	 	 
	/s/ Bill Gross	 
	Bill Gross	 
	Chief Executive Officer

                                Heliogen, Inc.
	 

 

I accept the position of Head of Project
Development, Heliogen, Inc., on the terms described within this letter.

 

	/s/ Tom Doyle	 	1/14/2021
	Tom Doyle - SIGNATURE	 	DATE

 

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ATTACHMENT I

 

Heliogen, Inc.

 

STOCK OPTION SUMMARY SHEET

 

The following
is a summary sheet of certain terms which apply to option grants to purchase common stock of Heliogen, Inc. (the “Company”).
For complete details, please carefully review the Company’s stock plan and the applicable option agreement between you and the Company.

 

	Exercise Price:	The purchase price per share will be equal to the fair market value of the common stock on the grant date.
	 	 
	Vesting:	Assuming you remain an employee, your stock option will vest with respect to 25% of the shares subject to the option on the one year anniversary of your commencement of employment and thereafter, 1/48th of the total shares each month so that the shares are fully vested on the fourth anniversary of your commencement date. Fifty percent (50%) of any unvested shares shall accelerate and become immediately vested if within six months after a Change of Control (as defined below), you are terminated by the Company other than for Cause (as defined below) or your employment is terminated by you for Good Reason (as defined below).
	 	 
	 	A “Change of Control” shall occur upon (i) any acquisition or merger of the Company where the stockholders of the Company immediately prior to such transaction hold 50% or less of the voting power of the surviving corporation or
	 	(ii) any sale of all or substantially all of the assets of the Company.
	 	 
	 	“Cause” is defined as (i) any act of fraud, embezzlement or dishonesty taken by you in connection with your job responsibilities, (ii) your conviction of or plea of guilty or nolo contendere to a felony, (iii) your willful misconduct which adversely affects or is likely to adversely affect the business and affairs of the Company, (iv) your continued willful refusal to perform your employment duties after you have received a written demand for performance from the Company which specifically sets forth the factual basis for the Company's belief that you have willfully refused to perform your duties or (v) your material breach of any provision of your offer letter or Employee Confidentiality and Non-Disclosure Agreement.
	 	 
	 	“Good Reason” is defined as (i) you are assigned duties materially inconsistent with, or reflecting a materially adverse change in, your compensation, position, duties, or responsibilities with the Company or (ii) the Company’s principal executive offices are relocated to a location which would require you to commute at least thirty (30) miles more each way than your commute to the Company’s principal executive offices as of the date of this Agreement.
	 	 
	Additional Conditions:	All option grants are subject to approval by the Company’s Board of Directors and availability under the Company’s option pool. Any stock option will be granted as of the date of approval of the grant by the Company’s Board of Directors. All option grants are subject to the terms, definitions and provisions of the Company’s stock plan and an applicable option agreement between you and the Company.

 

 

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