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): March 914, 2022 ( March 911, 2022)

FirstMark Horizon Acquisition Corp.

(Exact name of registrant as specified in its charter)

Delaware		001- 39585		85-2547650
(State or other jurisdiction of incorporation)		(Commission File Number)		(I.R.S. Employer Identification No.)

100 5th Ave, 3rd Floor New York, NY		10011
(Address of principal executive offices)		(Zip Code)

(212) 792-2200
(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 filing 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:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Units, each consisting of one share of Class A common stock and one-third of one redeemable warrant	FMAC.U	New York Stock Exchange
Class A common stock, par value $0.0001 per share	FMAC	New York Stock Exchange
Redeemable warrants, each whole warrant exercisable for one share of Class A common stock at an exercise price of $11.50	FMAC WS	New York Stock Exchange

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. ☐

Item 1.01. Entry into a Material Definitive Agreement.

~~Non~~On March 11, 2022, FirstMark Horizon Acquisition Corp. (the “Company”) and Credit Suisse Securities (USA) LLC (“Credit Suisse”), entered into an amendment letter (the “Amendment Letter”) whereby the Company and Credit Suisse agreed to amend certain terms of the underwriting agreement between the Company and Credit Suisse, as representative of the several underwriters thereunder, dated October 5, 2020, and filed with the Securities and Exchange Commission (the “SEC”) on a Current Report on Form 8-~~Redemption~~K on October 8, 2020 (the “Underwriting Agreement”). Pursuant to the Amendment Letter, the Company and Credit Suisse agreed that (i) Credit Suisse will reduce the Deferred Discount (as defined in the Underwriting Agreement) payable to it by the Company from $14,490,000 to $9,990,000 under the same terms of the Underwriting Agreement, and such payment will satisfy in full the Company’s obligation to pay the Deferred Discount under the Underwriting Agreement, and (ii) in the Company’s sole and exclusive discretion, up to $4,500,000 of the previously allocated Deferred Discount may be allocated by the Company to one or more FINRA members, including certain of the underwriters and/or their affiliates, that assist the Company in connection with its initial business combination or following the consummation thereof. Except as set forth above, the terms of the Underwriting Agreement remain unchanged and in full force and effect as a result of the Amendment Letter.

~~FirstMark~~On ~~Horizon~~March ~~Acquisition Corp. (“FirstMark”) is a blank check company incorporated in Delaware and formed for the purpose of effecting a merger~~14, ~~capital stock exchange~~2022, ~~asset~~and ~~acquisition,~~in ~~stock~~connection ~~purchase, reorganization or similar business combination~~ with ~~one~~ orthe ~~more~~Company’s ~~businesses.~~entry ~~On October 6, 2021, FirstMark entered~~ into ~~an Agreement and Plan of Merger (~~the ~~“Merger~~Amendment ~~Agreement”) with Sirius Merger Sub~~Letter, ~~Inc.,~~the aCompany ~~Delaware corporation~~ and aContinental ~~wholly~~Stock ~~owned direct subsidiary of FirstMark (“Merger Sub”),~~Transfer ~~Starry,~~& ~~Inc.,~~Trust aCompany ~~Delaware corporation~~ (“~~Starry~~CST”), ~~and~~entered ~~Starry~~into ~~Group~~an ~~Holdings,~~amendment ~~Inc.~~to ~~(formerly~~that ~~Starry~~certain ~~Holdings, Inc.),~~Investment aManagement ~~Delaware~~Trust ~~corporation and wholly owned direct subsidiary of Starry (“Starry Group Holdings”). Pursuant to the Merger~~ Agreement, ~~and~~between ~~subject to~~ the ~~terms~~Company and ~~conditions contained therein~~CST, ~~the~~dated ~~business~~October ~~combination~~5, ~~will~~2020, beand ~~effected~~filed ~~in two steps: (a) FirstMark will merge~~ with ~~and into Starry Group Holdings (~~the ~~“SPAC~~SEC ~~Merger”~~on ~~and,~~a ~~the~~Current ~~closing~~Report ofon ~~the~~Form ~~SPAC Merger, the “SPAC~~8-K ~~Merger~~on ~~Closing,”~~October ~~and~~8, ~~the~~2020 ~~time at which~~ (the ~~SPAC Merger becomes effective, the~~ “~~SPAC Merger Effective Time~~IMTA”), ~~with~~ ~~Starry~~to ~~Group~~revise ~~Holdings surviving~~ the ~~SPAC~~definition ~~Merger as a publicly traded entity (such surviving entity, “New Starry”) and becoming the sole owner~~ of ~~Merger Sub; and (b) at least twenty-four (24) hours, but no more than forty-eight (48) hours, after the SPAC Merger Effective Time, Merger Sub will merge with and into Starry (the~~ “~~Acquisition Merger~~Deferred Discount” ~~and,~~in ~~together with~~ the ~~SPAC~~IMTA ~~Merger~~as ~~and~~set ~~all~~forth ~~other~~in ~~transactions contemplated by~~ the ~~Merger~~preceding ~~Agreement~~paragraph, ~~the~~to ~~“Business~~reflect ~~Combination”), with Starry surviving~~ the ~~Acquisition~~Amendment ~~Merger as a wholly owned subsidiary of New Starry~~Letter.

~~In connection with FirstMark’s entry into~~Item the Merger Agreement, FirstMark, Starry Group Holdings and certain accredited investors (each, an “Investor”, and collectively, the “Investors”) entered into a Non-Redemption Agreement (“Non-Redemption Agreement”) in substantially the same form as filed with this Current Report on Form 8-K (this “Current Report”) as Exhibit 109.1,01. ~~dated~~Financial ~~March~~Statements ~~9, 2022~~ and ~~March 9, 2022, respectively~~Exhibits.

~~Pursuant to the Non-Redemption Agreements, each Investor agreed for the benefit of FirstMark to not redeem a certain number of shares of Class A common stock of FirstMark, par value $0.0001 per share~~ (~~“FirstMark Class A Common Stock”~~d)~~, beneficially owned by~~ ~~it which it holds on the date of the Non-Redemption Agreement representing 2,398,613 shares of FirstMark Class A Common Stock, in the aggregate (the “Investor Shares”)~~Exhibits. In connection with these commitments from the Investors, Starry Group Holdings has agreed to issue to each Investor a number of shares of Starry Group Holdings Class A common stock, par value $0.0001 per share (“Starry Group Holdings Class A Common Stock”), equal to (i) the number of Investor Shares beneficially owned by such Investor multiplied by (ii) (a) 1.33 less (b) the Class A Exchange Ratio (as defined in the Merger Agreement) in each case, at or promptly following the consummation of the Acquisition Merger (such shares of Starry Group Holdings Class A Common Stock, the “New Investor Shares”); provided that, in no event will the New Investor Shares be less than 422,108, in the aggregate (as adjusted for stock splits, stock dividends, stock combinations, recapitalizations and similar events).

FirstMark, Starry Group Holdings and the Investors are not to be considered a “group”, either by the terms of the Non-Redemption Agreements or at any time in the future, within the meaning of the Securities Exchange Act of 1934, as amended.

Exhibit No.		Description
1.1		Amendment Letter, dated as of March 11, 2022
10.1		First Amendment to Investment Management Trust Agreement, dated as of March 14, 2022
104		Cover Page Interactive Data File (embedded within the Inline XBRL document)

FirstMark may enter into additional arrangements similar to the Non-Redemption Agreements described above.

The foregoing description of the Non-Redemption Agreements is subject to and qualified in its entirety by reference to the full text of the form of Non-Redemption Agreement, a copy of which is attached as Exhibit 10.1 hereto, and the terms of which are incorporated herein by reference.

Item 3.02 Unregistered Sales of Equity Securities.

The disclosure set forth above in Item 1.01 of this Current Report with respect to the Non-Redemption Agreements is incorporated by reference in this Item 3.02. The New Investor Shares to be issued in connection with the Non-Redemption Agreements will not be registered under the Securities Act, and will be issued in reliance on the exemption from registration requirements thereof provided under the Securities Act.

Important Information About the Merger and Where to Find It

In connection with the proposed business combination, Starry Group Holdings, a newly formed subsidiary of Starry, has filed a registration statement on Form S-4 (the “Form S-4”) with the Securities and Exchange Commission (the “SEC”) on November 5, 2021 (as amended on December 20, 2021, January 14, 2022, February 4, 2022 and February 9, 2022). The Form S-4 includes a proxy statement of FirstMark and a prospectus of Starry Group Holdings, referred to as a proxy statement/prospectus. The Form S-4 has been declared effective by the SEC and the definitive proxy statement/prospectus has been sent to all FirstMark stockholders. Additionally, Starry Group Holdings and FirstMark have also filed and may continue to file other relevant materials with the SEC in connection with the proposed business combination, including a supplement to the definitive proxy statement/prospectus filed on March 7, 2022 and mailed to all FirstMark stockholders. Copies of the Form S-4, the definitive proxy statement/prospectus and all other relevant materials filed or that will be filed with the SEC by FirstMark or Starry Group Holdings may be obtained free of charge at the SEC’s website at www.sec.gov. Before making any voting or investment decision, investors and security holders of FirstMark are urged to read the Form S-4, the definitive proxy statement/prospectus and all other relevant materials filed or that will be filed with the SEC in connection with the proposed business combination because they will contain important information about the proposed business combination and the parties to the proposed business combination.

Participants in the Solicitation

FirstMark, Starry Group Holdings and Starry and their respective directors and executive officers, under SEC rules, may be deemed to be participants in the solicitation of proxies of FirstMark’s stockholders in connection with the proposed business combination. Investors and security holders may obtain more detailed information regarding the names and interests in the proposed business combination of FirstMark’s directors and officers in FirstMark’s filings with the SEC, including FirstMark’s registration statement on Form S-1, which was originally filed with the SEC on September 18, 2020. To the extent that holdings of FirstMark’s securities have changed from the amounts reported in FirstMark’s registration statement on Form S-1, such changes have been or will be reflected on Statements of Change in Ownership on Form 4 filed with the SEC. Information regarding the persons who may, under SEC rules, be deemed participants in the solicitation of proxies to FirstMark’s stockholders in connection with the business combination is included in the definitive proxy statement/prospectus relating to the proposed business combination. You may obtain free copies of these documents as described in the preceding paragraph.

No Offer or Solicitation

This Current Report shall not constitute a proxy statement or solicitation of a proxy, consent or authorization with respect to any securities or in respect of the proposed business combination. This Current Report shall also not constitute an offer to sell or a solicitation of an offer to buy any securities of FirstMark, Starry Group Holdings or Starry, nor shall there be any sale of securities in any state or jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state or jurisdiction. No offering of securities shall be made except by means of a prospectus meeting the requirements of Section 10 of the Securities Act of 1933, as amended.

Forward-Looking Statements

Certain statements made in this Current Report are “forward-looking statements” within the meaning of the “safe harbor” provisions of the Private Securities Litigation Reform Act of 1995 with respect to the proposed business combination between FirstMark and Starry. Words such as “expect,” “estimate,” “project,” “budget,” “forecast,” “anticipate,” “intend,” “plan,” “may,” “will,” “could,” “should,” “believe,” “predict,” “potential,” “continue,” “strategy,” “future,” “opportunity,” “would,” “seem,” “seek,” “outlook” and similar expressions are intended to identify such forward-looking statements. Forward-looking statements are predictions, projections and other statements about future events that are based on current expectations and assumptions and, as a result, are subject to risks and uncertainties that could cause the actual results to differ materially from the expected results. These statements are based on various assumptions, whether or not identified in this Current Report. These forward-looking statements are provided for illustrative purposes only and are not intended to serve as, and must not be relied on by an investor as, a guarantee, an assurance, a prediction or a definitive statement of fact or probability. Actual events and circumstances are difficult or impossible to predict and will differ from assumptions. These forward-looking statements include, without limitation, Starry’s and FirstMark’s expectations with respect to the anticipated financial impacts of the proposed business combination, the satisfaction of closing conditions to the proposed business combination, and the timing of the completion of the proposed business combination. You should carefully consider the risks and uncertainties described in the “Risk Factors” section of FirstMark’s registration statement on Form S-1 (File No. 333-248916), its Annual Report on Form 10-K, as amended from time to time, for the fiscal year ended December 31, 2020, and its subsequent Quarterly Reports on Form 10-Q. In addition, there are risks and uncertainties described in the definitive proxy statement/prospectus filed by Starry Group Holdings and other documents filed by FirstMark or Starry Group Holdings from time to time with the SEC. These filings identify and address other important risks and uncertainties that could cause actual events and results to differ materially from those contained in the forward-looking statements. Most of these factors are outside Starry’s, Starry Group Holdings’ and FirstMark’s control and are difficult to predict. Many factors could cause actual future events to differ from the forward-looking statements in this Current Report, including but not limited to: (1) the outcome of any legal proceedings that may be instituted against FirstMark, Starry or Starry Group Holdings following the announcement of the proposed business combination; (2) the inability to complete the proposed business combination, including due to the inability to concurrently close the business combination and related transactions, including the private placements of common stock and convertible notes or due to failure to obtain approval of the stockholders of FirstMark; (3) the risk that the proposed business combination may not be completed by FirstMark’s business combination deadline and the potential failure to obtain an extension of the business combination deadline if sought by FirstMark; (4) the failure to satisfy the conditions to the consummation of the proposed business combination, including the approval by the stockholders of FirstMark, the satisfaction of the minimum trust account amount following any redemptions by FirstMark’s public stockholders and the receipt of certain governmental and regulatory approvals; (5) delays in obtaining, adverse conditions contained in, or the inability to obtain necessary regulatory approvals or complete regulatory reviews required to complete the proposed business combination; (6) the occurrence of any event, change or other circumstance that could give rise to the termination of the merger agreement; (7) volatility in the price of FirstMark’s, Starry’s or Starry Group Holdings’ securities; (8) the risk that the proposed business combination disrupts current plans and operations as a result of the announcement and consummation of the business combination; (9) the inability to recognize the anticipated benefits of the proposed business combination, which may be affected by, among other things, competition, the ability of the combined company to grow and manage growth profitably, maintain relationships with customers and suppliers and retain key employees; (10) costs related to the proposed business combination; (11) changes in the applicable laws or regulations; (12) the possibility that the combined company may be adversely affected by other economic, business, and/or competitive factors; (13) the risk of downturns and a changing regulatory landscape in the highly competitive industry in which Starry operates; (14) the impact of the global COVID-19 pandemic; (15) Starry’s ability to obtain or maintain rights to use licensed spectrum in any market in which Starry operates and potential declines in the value of Starry’s FCC licenses; (16) the potential inability of Starry to raise additional capital needed to pursue its business objectives or to achieve efficiencies regarding other costs; (17) the enforceability of Starry’s intellectual property, including its patents, and the potential infringement on the intellectual property rights of others, cyber security risks or potential breaches of data security; and (18) other risks and uncertainties described in FirstMark’s registration statement on Form S-1 and Annual Report on Form 10-K, as amended from time to time, for the fiscal year ended December 31, 2020 and its subsequent Quarterly Reports on Form 10-Q, and in the definitive proxy statement/prospectus filed by Starry Group Holdings. These risks and uncertainties may be amplified by the COVID-19 pandemic, which has caused significant economic uncertainty. Starry, Starry Group Holdings and FirstMark caution that the foregoing list of factors is not exclusive or exhaustive and not to place undue reliance upon any forward-looking statements, including projections, which speak only as of the date made. None of Starry, Starry Group Holdings or FirstMark gives any assurance that Starry, Starry Group Holdings or FirstMark will achieve its expectations. None of Starry, Starry Group Holdings or FirstMark undertakes or accepts any obligation to publicly provide revisions or updates to any forward-looking statements, whether as a result of new information, future developments or otherwise, or should circumstances change, except as otherwise required by securities and other applicable laws.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits

Exhibit No.		Description
10.1		Form of Non-Redemption Agreement

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.

FirstMark Horizon Acquisition Corp. By: /s/ Amish Jani Name: Amish Jani Title: President

	FirstMark Horizon Acquisition Corp.

Date: March 14, 2022

	By:	/s/ Amish Jani
	Name:	Amish Jani
	Title:	President

~~Dated: March 9, 2021~~2

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