UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 12b-25

NOTIFICATION OF LATE FILING

(Check one):

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Form 10-K

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Form 20-F

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Form 11-K

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Form 10-Q

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Form 10-D

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Form N-CEN

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Form N-CSR

For Period Ended:

September 30, 2021

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Transition Report on Form 10-K

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Transition Report on Form 20-F

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Transition Report on Form 11-K

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Transition Report on Form 10-Q

For the Transition Period Ended:

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

Fortistar Sustainable Solutions Corp.

Full Name of Registrant

N/A

Former Name if Applicable

One North Lexington Avenue

Address of Principal Executive Office (Street and Number)

White Plains, NY 10601

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. (Attach extra Sheets if Needed)

Fortistar Sustainable Solutions Corp. (the “Company”) has determined that it is unable, without unreasonable effort or expense, to file its Quarterly Report on Form 10-Q for the fiscal quarter ended September 30, 2021 (the “Third Quarterly Report”) by November 15, 2021 (the “Prescribed Due Date”) for the reasons described below.

In connection with the preparation of the Third Quarterly Report, management identified errors made in the Company’s historical financial statements where, at the closing of the Company’s Initial Public Offering, the Company may have improperly valued its Class A common stock subject to possible redemption. The Company previously determined the Class A common stock subject to possible redemption to be equal to the redemption value of $10.00 per share of Class A common stock while also taking into consideration a redemption cannot result in net tangible assets being less than $5,000,001. The Company has since determined that the Class A common stock issued during the Initial Public Offering can be redeemed or become redeemable subject to the occurrence of future events considered outside the Company’s control. Therefore, the Company has concluded that the redemption value should include all of Class A common stock subject to possible redemption, which would result in the Class A common stock subject to possible redemption being equal to their redemption value.

The Company is reviewing the impacts of having improperly valued its Class A common stock subject to possible redemption on the Company’s unaudited financial statements for the quarterly periods ended March 31, 2021, June 30, 2021 and September 30, 2021 (the “Quarterly Reports”). Given the scope of the process for determining the impact on the Quarterly Reports and the time and resources required to do so, the Company determined that it would be unable to file the Third Quarter Report by the Prescribed Due Date, without unreasonable effort and expense. The Company is working diligently and currently expects to file the Third Quarterly Report within five calendar day of the Prescribed Due Date.

PART IV — OTHER INFORMATION

(1) Name and telephone number of person to contact in regard to this notification

	Scott Contino		914		421-4900
	(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☒

If so, attach an explanation of the anticipated change, both narratively and quantitatively, and, if appropriate, state the reasons why a reasonable estimate of the results cannot be made.

Forward-Looking Statements

This Form 12b-25 includes “forward-looking statements” within the meaning of the “safe harbor” provisions of the Private Securities Litigation Reform Act of 1995. The Company’s actual results may differ from its expectations, estimates and projections and consequently, you should not rely on these forward-looking statements as predictions of future events. Words such as “expect,” “estimate,” “anticipate,” “intend,” “plan,” “may,” “will,” “could,” “should,” “believes,” “continue,” and similar expressions are intended to identify such forward-looking statements. These forward-looking statements include, without limitation, the completion of the Company’s quarterly review procedures, many of which are outside the Company’s control, the Company’s expectations with respect to the timing of the filing of its Second Quarterly Report. These forward-looking statements involve significant risks and uncertainties that could cause the actual results to differ materially from the expected results, including those under “Risk Factors” in the Company’s: (i) Registration Statement on Form S-1 filed with the SEC and declared effective on January 26, 2021 in connection with our initial public offering, (ii) First Quarterly Report filed with the SEC on July 26, 2021; (iii) Second Quarterly Report filed with the SEC on August 23, 2021; and (iv) subsequent reports filed with the SEC after the date hereof. Most of these factors are outside the Company’s control and are difficult to predict. The Company cautions readers not to place undue reliance upon any forward-looking statements, which speak only as of the date made. The Company does not undertake or accept any obligation or undertaking to release publicly any updates or revisions to any forward-looking statements to reflect any change in its expectations or any change in events, conditions or circumstances on which any such statement is based, except to the extent required by law.

Fortistar Sustainable Solutions 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 16, 2021	By:	/s/ Scott Contino
			Name: Scott Contino Title: Chief Financial Officer

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.