UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G/A

Under the Securities Exchange Act of 1934


FirstMark Horizon Acquisition Corp
(Name of Issuer)

Class A common stock, par value $0.0001 per share
(Title of Class of Securities)

33765Y101
(CUSIP Number)

December 31, 2021
(Date of Event Which Requires Filing of this Statement)


Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

ý	Rule 13d-1(b)
o	Rule 13d-1(c)
o	Rule 13d-1(d)

(Page 1 of 8 Pages)

______________________________

The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

1	NAME OF REPORTING PERSON Glazer Capital, LLC
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) ¨ (b) ¨
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION State of Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:	5	SOLE VOTING POWER 0
	6	SHARED VOTING POWER 173,248
	7	SOLE DISPOSITIVE POWER 0
	8	SHARED DISPOSITIVE POWER 173,248
9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 173,248
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES			¨
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 0.42%
12	TYPE OF REPORTING PERSON IA, OO

1	NAME OF REPORTING PERSON Paul J. Glazer
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) ¨ (b) ¨
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION United States
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:	5	SOLE VOTING POWER 0
	6	SHARED VOTING POWER 173,248
	7	SOLE DISPOSITIVE POWER 0
	8	SHARED DISPOSITIVE POWER 173,248
9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 173,248
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES			¨
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 0.42%
12	TYPE OF REPORTING PERSON IN

Item 1(a).	NAME OF ISSUER:

	The name of the issuer is FirstMark Horizon Acquisition Corp (the "Company").

Item 1(b).	ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES:

	The Company's principal executive offices are located at 100 5th Ave, 3rd Floor, New York, NY

Item 2(a).	NAME OF PERSON FILING:

	This statement is filed by:

	(i)	Glazer Capital, LLC, a Delaware limited liability company ("Glazer Capital"), with respect to the shares of Common Stock (as defined in Item 2(d)) held by certain funds and managed accounts to which Glazer Capital serves as investment manager (collectively, the "Glazer Funds"); and

	(ii)	Mr. Paul J. Glazer ("Mr. Glazer"), who serves as the Managing Member of Glazer Capital, with respect to the shares of Common Stock held by the Glazer Funds.

	The foregoing persons are hereinafter sometimes collectively referred to as the "Reporting Persons."

	The filing of this statement should not be construed as an admission that any of the Reporting Persons is, for the purposes of Section 13 of the Act, the beneficial owner of the shares of Common Stock reported herein.

Item 2(b).	ADDRESS OF PRINCIPAL BUSINESS OFFICE OR, IF NONE, RESIDENCE:

	The address of the business office of each of the Reporting Persons is 250 West 55^th Street, Suite 30A, New York, New York 10019.

Item 2(c).	CITIZENSHIP:

	Glazer Capital is a Delaware limited liability company. Mr. Glazer is a United States citizen.

Item 2(d).	TITLE OF CLASS OF SECURITIES:

	Class A common stock, par value $0.0001 per share

Item 2(e).	CUSIP NUMBER:

	33765Y101

Item 3.	IF THIS STATEMENT IS FILED PURSUANT TO RULES 13d-1(b) OR 13d-2(b) OR (c), CHECK WHETHER THE PERSON FILING IS A:

	(a)	¨	Broker or dealer registered under Section 15 of the Act (15 U.S.C. 78o);

(b)	¨	Bank as defined in Section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	¨	Insurance company as defined in Section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	¨	Investment company registered under Section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	ý	Investment adviser in accordance with Rule 13d-1(b)(1)(ii)(E);
(f)	¨	Employee benefit plan or endowment fund in accordance with Rule 13d-1(b)(1)(ii)(F);
(g)	ý	Parent holding company or control person in accordance with Rule 13d-1(b)(1)(ii)(G);
(h)	¨	Savings association as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	¨	Church plan that is excluded from the definition of an investment company under Section 3(c)(14) of the Investment Company Act (15 U.S.C. 80a-3);
(j)	¨	Non-U.S. institution in accordance with Rule 13d-1(b)(1)(ii)(J);
(k)	¨	Group, in accordance with Rule 13d-1(b)(1)(ii)(K).

If filing as a non-U.S. institution in accordance with Rule 13d-1(b)(1)(ii)(J), please

specify the type of institution:

Item 4.	OWNERSHIP

	The information required by Items 4(a) – (c) is set forth in Rows (5) – (11) of the cover page for each Reporting Person hereto and is incorporated herein by reference for each such Reporting Person.

	The percentages set forth in Row (11) of the cover page for each Reporting Person and elsewhere in this Schedule 13G/A are based on the 41,400,000 shares of Class A common stock, par value $0.0001 per share outstanding.

Item 5.	OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS.

	If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following [X].

Item 6.	OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON.

	Not applicable.

Item 7.	IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY.

	Not applicable.

Item 8.	IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP.

	Not applicable.

Item 9.	NOTICE OF DISSOLUTION OF GROUP.

	Not applicable.

Item 10.

CERTIFICATION.

	Each of the Reporting Persons hereby makes the following certification:

	By signing below each Reporting Person certifies that, to the best of its or his knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect.

SIGNATURES

After reasonable inquiry and to the best of its or his knowledge and belief, each of the undersigned certifies that the information set forth in this statement is true, complete and correct.

DATE: February 14, 2022

GLAZER CAPITAL, LLC


By: /s/ Paul J. Glazer
Name: Paul J. Glazer
Title: Managing Member


/s/ Paul J. Glazer
PAUL J. GLAZER

EXHIBIT I

JOINT FILING AGREEMENT

The undersigned acknowledge and agree that the foregoing statement on Schedule 13G is filed on behalf of each of the undersigned and that all subsequent amendments to this statement on Schedule 13G shall be filed on behalf of each of the undersigned without the necessity of filing additional joint filing agreements. The undersigned acknowledge that each shall be responsible for the timely filing of such amendments, and for the completeness and accuracy of the information concerning him or it contained herein and therein, but shall not be responsible for the completeness and accuracy of the information concerning the others, except to the extent that he or it knows or has reason to believe that such information is inaccurate.

DATED as of February 14, 2022

GLAZER CAPITAL, LLC


By: /s/ Paul J. Glazer
Name: Paul J. Glazer
Title: Managing Member


/s/ Paul J. Glazer
PAUL J. GLAZER

FirstMark Horizon Acquisition Corp. SC 13G/A