Exhibit 4.4


 


THE SECURITIES REPRESENTED BY THIS WARRANT,
AND THE SECURITIES ISSUABLE UPON EXERCISE THEREOF, HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “ACT”),
OR APPLICABLE STATE SECURITIES LAWS. THE SECURITIES HAVE BEEN ACQUIRED FOR INVESTMENT AND MAY NOT BE OFFERED FOR SALE, SOLD, TRANSFERRED
OR ASSIGNED IN THE ABSENCE OF AN EFFECTIVE REGISTRATION STATEMENT FOR THE SECURITIES UNDER THE ACT OR APPLICABLE STATE SECURITIES LAWS,
OR AN OPINION OF COUNSEL IN A FORM REASONABLY SATISFACTORY TO THE ISSUER THAT REGISTRATION IS NOT REQUIRED UNDER THE ACT OR APPLICABLE
STATE SECURITIES LAWS.


 


Issue Date: October 28, 2021


 


WARRANT TO PURCHASE COMMON STOCK


 


OF


 


NEXTNAV INC.


 


THIS CERTIFIES THAT in consideration of good and
valuable consideration, the undersigned, or its permitted registered assigns (the “Registered Holder”), is entitled,
subject to the terms and conditions of this Warrant, to purchase from NextNav Inc., a Delaware corporation (formerly known as Spartacus
Acquisition Shelf Corp.) (the “Company”) during the Exercisability Period, up to 4,320,133 Warrant Shares. Capitalized
terms used but not defined herein shall have the meanings assigned to them in the Agreement and Plan of Merger, dated as of June 9, 2021,
by and among (i) NextNav, LLC, a Delaware limited liability company, (ii) NextNav Holdings, LLC, a Delaware limited liability company,
(iii) NEA 14 NextNav Blocker, LLC, a Delaware limited liability company, (iv) Oak NextNav Blocker, LLC, a Delaware limited liability company,
(v) Columbia Progeny Partners IV, Inc., a Delaware corporation, (vi) Global Long Short Partners Aggregating Holdings Del VII LLC, a Delaware
limited liability company, (vii) Global Private Opportunities Partners Holdings II Corp, a Delaware corporation, (viii) SASC (SPAC) Merger
Sub 1 Corporation, a Delaware corporation, (ix) SASC (Target) Merger Sub 2 LLC, a Delaware limited liability company, (x) SASC (NB) Merger
Sub 3 LLC, a Delaware limited liability company, (xi) SASC (OB) Merger Sub 4 LLC, a Delaware limited liability company, (xii) SASC (CB)
Merger Sub 5 Corporation, a Delaware corporation, (xiii) SASC (GB1) Merger Sub 6 LLC, a Delaware limited liability company, (xiv) SASC
(GB2) Merger Sub 7 Corporation, a Delaware corporation, (xv) Spartacus Acquisition Corporation, a Delaware corporation, and (xvi) the
Company (as the same may be amended from time to time, the “Merger Agreement”).

 


1. Defined
Terms. The following definitions shall apply for purposes of this Warrant:


 


1.1 “Change
of Control” shall mean any sale, transfer or issuance or series of sales, transfers and/or issuances of shares of the capital
stock by the Company or any holders thereof which results in any Person or group of Persons (as the term “group” is used under
the Securities Exchange Act of 1934, as amended), other than the holders of capital stock immediately prior to such sale, transfer or
issuance, owning capital stock of the Company possessing the voting power (under ordinary circumstances) to elect a majority of the Board
of Directors of the Company.


 


1.2 “Closing
Sale Price” means, for any security as of any date, the last closing trade price, respectively, for such security on the
Principal Market, as reported by Bloomberg, or, if the Principal Market begins to operate on an extended hours basis and does not designate
the closing trade price then the last trade price, of such security prior to 4:00:00 p.m., New York time, as reported by Bloomberg, or,
if the Principal Market is not the principal securities exchange or trading market for such security, the last trade price of such security
on the principal securities exchange or trading market where such security is listed or traded as reported by Bloomberg, or if the foregoing
do not apply, the last trade price of such security in the over-the-counter market on the electronic bulletin board for such security
as reported by Bloomberg, or, if no last trade price is reported for such security by Bloomberg, the average of the bid prices, or the
ask prices, respectively, of any market makers for such security as reported in the OTC Link or on the “pink sheets” by OTC
Markets Group Inc. (formerly Pink Sheets LLC). If the Closing Sale Price cannot be calculated for a security on a particular date on any
of the foregoing bases, the Closing Sale Price of such security on such date shall be the fair market value as mutually determined by
the Company and the Registered Holder. If the Company and the Registered Holder are unable to agree upon the fair market value of such
security, then such dispute shall be resolved pursuant to Section 6.8. All such determinations to be appropriately adjusted for any
stock dividend, stock split, stock combination, reclassification or other similar transaction during the applicable calculation period.


 






     


     


    

 


1.3 “Exercisability
Period” means the period of time beginning on the Issue Date and ending on October 7, 2039.


 


1.4 “Exercise
Price” means $0.01.


 


1.5 “Original
Warrant” means, collectively, (a) that certain Warrant to Purchase Class D Preferred Units of NextNav Holdings, LLC, dated
October 7, 2019, issued by NextNav Holdings, LLC (“Holdings”) to SBC Tower Holdings LLC, a Delaware limited
liability company (“SBC Holdings”), and subsequently assigned by SBC Holdings to AT&T Investment & Tower
Holdings, LLC, a Delaware limited liability company (“AT&T Tower Holdings”), on February 4, 2020; (b) that
certain Warrant to Purchase Class D Preferred Units of Holdings, dated March 5, 2020, issued by Holdings to AT&T Tower Holdings; and
(c) that certain Class A-1 Common Units and/or Class A-2 Common Units Purchase Warrant, dated March 5, 2020, issued by Holdings to AT&T
Tower Holdings.


 


1.6 “Principal
Market” means The Nasdaq Capital Market.


 


1.7 “Trading
Day” means any day on which the Company’s common stock is traded on the Principal Market, or, if the Principal Market
is not the principal trading market for the Company’s common stock, then on the principal securities exchange or securities market
on which the Company’s common stock is then traded.


 


1.8 “Warrant”
means this Warrant and any warrant(s) delivered in substitution or exchange therefor.


 


1.9 “Warrants”
means a series of warrants to purchase shares of the Company’s common stock, including this Warrant, each containing substantially
similar terms and conditions as this Warrant.


 


1.10 “Warrant
Shares” means shares of the Company’s common stock issuable upon the exercise of this Warrant. The number and character
of Warrant Shares are subject to adjustment as provided herein and the term “Warrant Shares” shall also include
other securities and property at any time receivable or issuable upon exercise of this Warrant in accordance with its terms.


 


2. Exercise.
Subject to compliance with all applicable securities laws and the other provisions of this Warrant:


 


2.1 Automatic
Exercise Upon Change of Control or Public Offering. If this Warrant has not been exercised pursuant to Section 2.3 hereof, this Warrant
shall automatically be exercised in full one Business Day prior to the consummation of a Change of Control.


 






    2


     


    

 


2.2 Automatic
Exercise Upon Expiration of Exercisability Period. If by the last day of the Exercisability Period this Warrant has not been exercised
pursuant to Section 2.1 or Section 2.3 hereof, this Warrant shall automatically be exercised in full on the last day of the Exercisability
Period.


 


2.3 Discretionary
Exercise. To the extent not already exercised pursuant to Section 2.1 or Section 2.2 hereof, this Warrant may, by advance written
notice of at least ten (10) days (or, if such period is not reasonably practicable, such advance written notice as would be reasonably
practicable) to the Company, be exercised in full at any time during the Exercisability Period for all of the Warrant Shares subject to
this Warrant.


 


2.4 Effect
of Exercise; Net Exercise.


 


2.4.1 Upon
an exercise pursuant to Section 2.1, Section 2.2 or Section 2.3 hereof, (a) the Registered Holder shall automatically be issued and
be deemed to accept a number of Warrant Shares equal to the number of Warrant Shares determined pursuant to Section 2.4.2 hereof, (b) regardless
of whether this Warrant is surrendered to the Company, this Warrant shall automatically expire, cease to have any force or effect and
shall not be exercisable for any Warrant Shares and (c) the effective time of such exercise shall be deemed to be 12:01 a.m. New
York time upon the date of exercise.


 


2.4.2 In
lieu of the Registered Holder making the cash payment otherwise contemplated to be made to the Company upon an exercise pursuant to Section
2.1, Section 2.2 or Section 2.3 hereof, the Registered Holder shall be deemed to have elected to receive upon such exercise the “Net
Number” of Warrant Shares determined according to the following formula:


 


Net Number = (A x B) - (A x C)


B


 


For purposes of the foregoing formula:


 


A = the total number of Warrants Shares with respect to
which this Warrant is then being exercised.


 


B = as applicable: (i) the Closing Sale Price of the Company
common stock on the Trading Day immediately preceding the date of the applicable exercise notice if such exercise notice is (A) both executed
and delivered pursuant to Section 2.3 hereof on a day that is not a Trading Day or (B) both executed and delivered pursuant to Section
2.3 hereof during “regular trading hours” on a Trading Day and is delivered within two (2) hours thereafter pursuant to Section
2.3 hereof or (ii) the Closing Sale Price of the Company common stock on the date of the applicable exercise notice if the date of such
exercise notice is a Trading Day and such exercise notice is both executed and delivered pursuant to Section 2.3 hereof after the close
of “regular trading hours” on such Trading Day.


 


C = the Exercise Price then in effect for the applicable
Warrant Shares at the time of such exercise.


 


2.5 Notice
of Automatic Exercise. The Company shall provide advance written notice of at least ten (10) days (or, if such period is not reasonably
practicable, such advance written notice as would be reasonably practicable) to the Registered Holder of the consummation of a Change
of Control that would result in an automatic exercise pursuant to Section 2.1 hereof.


 






    3


     


    

 


2.6 Vesting
of Rights. The Registered Holder’s right to purchase the Warrant Shares is 100% vested as of the Issue Date.


 


3. Restrictions
on Transfer. Subject to the transfer conditions referred to in the legend hereon and compliance with Section 4, any transferee(s)
entering into a written agreement with the Company to be bound by the terms and conditions of this Warrant, this Warrant may be assigned,
conveyed or transferred, in whole or in part (provided, under no circumstances may any rights be assigned, conveyed or transferred such
that the Registered Holder of this Warrant has different rights compared to such transferee of this Warrant (other than differences arising
from differences in the number of Warrant Shares in the event only a portion of this Warrant is assigned, conveyed or transferred)), by
giving the Company notice of the portion of the Warrant being transferred setting forth the name, address and taxpayer identification
number of the transferee and surrendering this Warrant to the Company for reissuance to such transferee(s) (and the Registered Holder,
if applicable); provided, that such assignment, conveyance or transfer shall result in the assignee, conveyee or transferee of
this Warrant holding a Warrant to purchase (i) at least 5% of the Warrant Shares outstanding under all Warrants as of the Issue Date (the
“Minimum Transfer Amount”) or (ii) if the number of Warrant Shares covered by this Warrant is less than the Minimum
Transfer Amount, all of the Warrant Shares outstanding under this Warrant. The rights and obligations of the Company and the Registered
Holder under this Warrant shall be binding upon and inure to the benefit of their respective permitted successors, assigns, heirs, administrators
and transferees.


 


4. Compliance
with the Securities Act.


 


4.1 Agreement
to Comply with the Securities Act; Legend. The Registered Holder, by acceptance of this Warrant, agrees to comply in all respects
with the provisions of this Section 4 and the restrictive legend requirements set forth on the face of this Warrant and further agrees
that such Registered Holder shall not offer, sell or otherwise dispose of this Warrant or any Warrant Shares to be issued upon exercise
hereof except under circumstances that will not result in a violation of the Act. This Warrant and all Warrant Shares issued upon exercise
of this Warrant (unless registered under the Act) shall be stamped or imprinted with a legend in substantially the following form:


 


“THE SECURITIES REPRESENTED BY THIS WARRANT, AND THE
SECURITIES ISSUABLE UPON EXERCISE THEREOF, HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “ACT”),
OR APPLICABLE STATE SECURITIES LAWS. THE SECURITIES HAVE BEEN ACQUIRED FOR INVESTMENT AND MAY NOT BE OFFERED FOR SALE, SOLD, TRANSFERRED
OR ASSIGNED IN THE ABSENCE OF AN EFFECTIVE REGISTRATION STATEMENT FOR THE SECURITIES UNDER THE ACT OR APPLICABLE STATE SECURITIES LAWS,
OR AN OPINION OF COUNSEL IN A FORM REASONABLY SATISFACTORY TO THE ISSUER THAT REGISTRATION IS NOT REQUIRED UNDER THE ACT OR APPLICABLE
STATE SECURITIES LAWS.”


 


4.2 Removal
of Legends. This Warrant and the Warrant Shares shall not be required to contain the legend set forth in Section 4.1 above or any
other legend (i) following any sale of the Warrant or Warrant Shares pursuant to Rule 144 (assuming the transferor is not an affiliate
of the Company), provided that the Registered Holder furnishes the Company with reasonable assurances that such Warrant or Warrant Shares
are eligible for sale, assignment or transfer under Rule 144, which shall not include an opinion of the Registered Holder’s counsel,
(ii) in connection with a sale, assignment or other transfer (other than under Rule 144), provided that the Registered Holder provides
the Company with an opinion of counsel to the Registered Holder, in a generally acceptable form, to the effect that such sale, assignment
or transfer of the Warrant or Warrant Shares may be made without registration under the applicable requirements of the Act or (iii) if
such legend is not required or customarily included under applicable provisions of the Act (including, without limitation, controlling
judicial interpretations and pronouncements issued by the SEC). If a legend is not required pursuant to the foregoing, the Company shall
no later than ten (10) Business Days following the delivery by the Registered Holder to the Company of notice with respect to this Warrant
or any Warrant Shares issued in the form of book-entries or, if applicable, a legended certificate representing any Warrant Shares (endorsed
or with stock powers attached, signatures guaranteed, and otherwise in form necessary to affect the reissuance and/or transfer, if applicable),
together with any other deliveries from the Registered Holder as may be reasonably required above in this Section 4.2 (such date,
the “Legend Removal Date”), at the Company’s option, either: (A) credit the applicable number of Warrant
Shares to the Registered Holder’s or its designee’s balance account or (B) issue and deliver (via reputable overnight courier)
to the Registered Holder, an updated form of this Warrant or a certificate representing Warrant Shares, as applicable, in the case of
each of clauses (A) and (B) above, free from all restrictive and other legends, registered in the name of the Registered Holder or its
designee.


 






    4


     


    

 


5. Adjustment
of Exercise Price and Number and Character of Warrant Shares. The number and character of Warrant Shares issuable upon exercise
of this Warrant (or any other securities or property at the time receivable or issuable upon exercise of this Warrant) and the Exercise
Price therefor, are subject to adjustment as follows:


 


5.1 Adjustment for Share
Splits, Share Dividends, Recapitalizations, etc. The Exercise Price and the number of Warrant Shares issuable upon exercise of
this Warrant shall be proportionally adjusted to the extent necessary to reflect any share dividend, share split, reverse share split,
combination of shares, reclassification, recapitalization or other similar event affecting the number of outstanding shares of the class
or series of the Warrant Shares that occurs after the Issue Date.


 


5.2 Adjustment for Reorganization, Consolidation,
Merger or Conversion. In the event (a) of any reorganization of the Company (or of any other entity, the shares or other securities
of which are at the time receivable on the exercise of this Warrant), (b) the Company (or any other such entity) shall consolidate with
or merge into another Person, or (c) the shares for which this Warrant is then exercisable are converted into shares or other securities
of a different class or series (in each case of clauses (a) through (c) other than in connection with a Change of Control, a “Reorganization
Event”) the Registered Holder of this Warrant, upon the exercise of this Warrant (as provided in Section 2) at any
time after the consummation of such Reorganization Event, shall be entitled to receive, in lieu of the shares or other securities and
property receivable upon the exercise of this Warrant prior to such consummation, the shares or other securities or property to which
such Registered Holder would have been entitled upon the consummation of such Reorganization Event if this Warrant had been exercised
immediately prior thereto, all subject to further adjustment as provided in this Section 4; and in each such case, the terms of this Warrant
shall be applicable to the shares or other securities or property receivable upon the exercise of this Warrant after the consummation
of such Reorganization Event.


 


5.3 Adjustment
Certificate. When any adjustment is required to be made to the Warrant Shares or the Exercise Price pursuant to this Section 4, the
Company shall promptly deliver to the Registered Holder a certificate setting forth (i) a brief statement of the facts requiring such
adjustment, (ii) the Exercise Price after such adjustment and (iii) the kind and amount of shares or other securities or property into
which this Warrant shall be exercisable after such adjustment.


 


6. Miscellaneous.


 


6.1 Cancellation
and Termination of Warrant. At any time, the Registered Holder of this Warrant may submit this Warrant to the Company for cancellation
and termination with no payment by the Registered Holder and no obligation of the Company to issue any Warrant Shares. Such cancellation
and termination shall be effective immediately upon the delivery of written notice thereof by the Holder to the Company along with the
surrender of this Warrant properly endorsed.


 






    5


     


    

 


6.2 Loss or Mutilation.
Upon receipt by the Company of evidence reasonably satisfactory to it of the ownership, and the loss, theft, destruction or mutilation,
of this Warrant, and of indemnity reasonably satisfactory to it, and (in the case of mutilation) upon surrender and cancellation of this
Warrant, the Company will execute and deliver in lieu thereof a new Warrant of like tenor.


 


6.3 No Rights as Shareholder.
This Warrant does not by itself entitle the Registered Holder to any rights as a shareholder of the Company. Prior to the exercise of
this Warrant, no provisions of this Warrant, and no enumeration herein of the rights or privileges of the Registered Holder, shall cause
such Registered Holder to be a shareholder of the Company for any purpose.


 


6.4 Amendment; Waiver.
Any term of this Warrant may be amended, and the observance of any term of this Warrant waived (either generally or in a particular instance
and either retroactively or prospectively), only with the written consent of the Company and the Registered Holder.


 


6.5 Notices.
Any notice required to be delivered under this Warrant shall be in addressed as follows:


 


If to the Company, to:


 


NextNav Inc.


 


1775 Tysons Blvd.


 


5th Floor


 


McLean, VA 22102,


 


Attention: Chief Financial Officer


 


Email: cgates@nextnav.com


 


with a copy (which shall not constitute notice) to:


 


Hogan Lovells US LLP


 


8350 Broad Street, 17th Floor


 


Tysons, VA 22102


 


Attention: Randy Segal and Adam Brown


 


Email: randy.segal@hoganlovells.com


 


adam.brown@hoganlovells.com


 


If to the Registered Holder, to the address set forth on the
signature page hereto.


 


Any notice provided for under this Warrant shall be in writing and
shall be either personally delivered, sent by electronic mail, or sent by reputable overnight courier service (charges prepaid). Notices
will be deemed to have been given hereunder if (i) delivered personally, when delivered at the address specified in this Section 7.5,
(ii) sent by electronic mail, when such electronic mail is sent to the e-mail address specified in this Section 7.5, or (iii) sent by
reputable overnight courier service, one day after deposit with such service.


 






    6


     


    

 


6.6 Governing
Law. This Warrant is governed by and shall be construed in accordance with the law of the State of Delaware, excluding any conflict-of-laws
rule or principle that might refer the governance or the construction of this Warrant to the law of another jurisdiction.


 


6.7 WAIVER
OF JURY TRIAL. TO THE EXTENT PERMITTED BY LAW, EACH OF THE COMPANY AND THE REGISTERED HOLDER HEREBY WAIVES ITS RIGHTS TO A TRIAL BY
JURY OF ANY CLAIM OR CAUSE OF ACTION BASED UPON OR ARISING OUT OF OR RELATED TO THIS WARRANT OR THE TRANSACTIONS CONTEMPLATED HEREBY,
IN ANY ACTION, PROCEEDING OR OTHER LITIGATION OF ANY TYPE BROUGHT BY ANY OF THE PARTIES AGAINST ANY OTHER PARTY OR PARTIES, WHETHER WITH
RESPECT TO CONTRACT CLAIMS, TORT CLAIMS, OR OTHERWISE. EACH PARTY HEREBY AGREES THAT ANY SUCH CLAIM OR CAUSE OF ACTION SHALL BE TRIED
BY A COURT TRIAL WITHOUT A JURY. WITHOUT LIMITING THE FOREGOING, THE PARTIES FURTHER AGREE THAT THEIR RESPECTIVE RIGHT TO A TRIAL BY JURY
IS WAIVED BY OPERATION OF THIS SECTION AS TO ANY ACTION, COUNTERCLAIM OR OTHER PROCEEDING WHICH SEEKS, IN WHOLE OR IN PART, TO CHALLENGE
THE VALIDITY OR ENFORCEABILITY OF THIS WARRANT, OR ANY PROVISION HEREOF. THIS WAIVER SHALL APPLY TO ANY SUBSEQUENT AMENDMENTS, RENEWALS,
SUPPLEMENTS OR MODIFICATIONS TO THIS WARRANT.


 


6.8 Exclusive
Jurisdiction And Venue. Each of the Company and the Registered Holder agrees that any dispute based on or arising out of, under or
in connection with this Warrant or any course of conduct, course of dealing, statements or actions or omissions of any party hereto relating
to this Warrant shall be litigated in and must be brought in the Delaware Court of Chancery (or, if such court refuses to accept jurisdiction,
any court of the State of New York located in New York County) or, in the case of claims to which the federal courts have exclusive subject
matter jurisdiction, the United States District Court for the Southern District of New York (and in the case of appeals, in the courts
in which appeals from such courts are to be heard). Each of the Company and the Registered Holder irrevocably submits to the personal
jurisdiction of such courts, and waives any objection they may have concerning the venue or convenience of such forum. Notwithstanding
the foregoing, however, the Company or the Registered Holder may commence any action or proceeding to enforce any judgment obtained against
another party in compliance with the foregoing provisions in any appropriate jurisdiction or court.


 


6.9 Terms Binding.
By acceptance and execution of this Warrant, the Registered Holder of this Warrant (and each subsequent assignee, transferee or Registered
Holder of this Warrant) accepts and agrees to be bound by all the terms and conditions of this Warrant.


 


6.10 Counterparts.
This Warrant may be executed in two or more counterparts, each of which shall be deemed an original, but all of which together shall constitute
one and the same instrument.


 


6.11 Entire
Agreement. This Warrant is intended by the parties as a final expression of their agreement and intended to be a complete and exclusive
statement of the agreement and understanding of the parties hereto in respect of the subject matter contained herein. There are no restrictions,
promises, representations, warranties, covenants or undertakings relating to such subject matter, other than those set forth or referred
to herein. This Warrant supersedes all prior agreements and understandings between the Company and the Registered Holder, both written
and oral, with respect to such subject matter, including without limitation, the Original Warrant.


 


[Signature Page Follows]


 




    7


     


    

 


IN WITNESS WHEREOF, the Company and the
Registered Holder have executed this Warrant as of the Issue Date.


 


	 	COMPANY:
	 	 	 
	 	NEXTNAV INC.
	 	 	 
	 	By:	/s/ Ganesh Pattabiraman 
	 	 	Name:  	Ganesh Pattabiraman
	 	 	Title:	President & Chief Executive Officer


 


	ACKNOWLEDGED AND ACCEPTED:	 
	 	 
	
    REGISTERED HOLDER:

     

    
	 
	NAME:	AT&T INVESTMENT & TOWER


HOLDINGS, LLC




	 
	 	 	 
	By:	/s/ Andrew Gillard	 
	 	Name: 	Andrew Gillard	 
	 	Title:	Vice President	 







 


	ADDRESS:	
    208 S. Akard
    St., #3202

    Dallas, TX 75202
	 
	 	 	 
	Attention:    	Andrew Gillard	 
	 	 	 
	Email:	***	 






 


[Signature
Page to Warrant to Purchase Shares of Common Stock of NextNav Inc.]