EXHIBIT 4.3
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DESCRIPTION OF THE REGISTRANT’S SECURITIES
REGISTERED PURSUANT TO SECTION 12 OF THE 
SECURITIES EXCHANGE ACT OF 1934
DESCRIPTION OF CAPITAL STOCK 
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When used herein, the terms “Company,” “we,” “our,” and “us” refer to Mustang Bio, Inc. 
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Capital Stock
The Company is authorized to issue 125,000,000 shares of common stock with a par value of $0.0001 per share, of which 1,000,000 shares are designated as Class A common stock and 2,000,000 of preferred stock at $0.0001 par value of which 250,000 are designated as Class A preferred stock. 
The holders of common stock are entitled to one vote per share of common stock held.
The undesignated preferred stock may be issued from time to time in one or more series. The Board of Directors is authorized to determine or alter the dividend rights, dividend rate, conversion rights, voting rights, rights and terms of redemption (including sinking fund provisions, if any), the redemption price or prices, the liquidation preferences and other designations, powers, preferences and relative, participating, optional or other special rights, if any, and the qualifications, limitations and restrictions granted to or imposed upon any wholly unissued series of preferred stock, and to fix the number of shares of any series of preferred stock (but not below the number of shares of any such series then outstanding).
Class A Common Stock
The holders of Class A common stock are entitled to the number of votes equal to the number of whole shares of common stock into which the shares of Class A common shares held by such holder are convertible. For a period of ten years from issuance, the holders of the Class A common stock have the right to appoint one member of the board of directors of Mustang. To date, the holders of Class A common stock have not yet appointed such director.
Class A Preferred Stock
The Class A Preferred Stock is identical to undesignated common stock other than as to voting rights, conversion rights, and the PIK dividend right.
The holders of the outstanding shares of Class A Preferred Stock receive on each January 1 (each a “PIK Dividend Payment Date”) after the original issuance date of the Class A Preferred Stock until the date all outstanding Class A Preferred Stock is converted into common stock or redeemed (and the purchase price is paid in full), pro rata per share dividends paid in additional fully paid and non-assessable shares of common stock such that the aggregate number of shares of common stock issued pursuant to such PIK dividend is equal to 2.5% of the Corporation’s fully-diluted outstanding capitalization on the date that is one business day prior to any PIK Dividend Payment Date (“PIK Record Date”). In the event the Class A Preferred Stock converts into common stock, the holders shall receive all PIK dividends accrued through the date of such conversion. No dividend or other distribution shall be paid, or declared and set apart for payment (other than dividends payable solely in capital stock on the capital stock) on the shares of common stock until all PIK dividends on the Class A Preferred Stock shall have been paid or declared and set apart for payment. All dividends are non-cumulative. 
On any matter presented to the stockholders for their action or consideration at any meeting of stockholders (or by written consent of stockholders in lieu of meeting), each holder of outstanding shares of Class A Preferred Stock shall be entitled to cast for each share of Class A Preferred Stock held by such holder as of the record date for determining stockholders entitled to vote on such matter, the number of votes that is equal to one and one-tenth (1.1) times a fraction, the numerator of which is the sum of (A) the number of shares of outstanding common stock and (B) the whole shares of common stock in to which the shares of outstanding Class A Common Stock and the Class A Preferred Stock are convertible, 

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and the denominator of which is number of shares of outstanding Class A Preferred Stock. Thus, the Class A Preferred Stock will at all times constitute a voting majority.
Each share of Class A Preferred Stock is convertible, at the option of the holder, into one fully paid and nonassessable share of common stock, subject to certain adjustments. If the Company, at any time effects a subdivision or combination of the outstanding common stock (by any stock split, stock dividend, recapitalization, reverse stock split or otherwise), the applicable conversion ratio in effect immediately before that subdivision is proportionately decreased or increased, as applicable, so that the number of shares of common stock issuable on conversion of each share of Class A Preferred Stock shall be increased or decreased, as applicable, in proportion to such increase or decrease in the aggregate number of shares of common stock outstanding. Additionally, if any reorganization, recapitalization, reclassification, consolidation or merger involving the Company occurs in which the common stock (but not the Class A Preferred Stock) is converted into or exchanged for securities, cash or other property, then each share of Class A Preferred Stock becomes convertible into the kind and amount of securities, cash or other property which a holder of the number of shares of common stock of the Company issuable upon conversion of one share of the Class A Preferred Stock immediately prior to such reorganization, recapitalization, reclassification, consolidation or merger would have been entitled to receive pursuant to such transaction.
Additional Features
Other features of our capital stock include:
		●	Dividend Rights. The holders of outstanding shares of our common stock, including Class A common stock, are entitled to receive dividends out of funds legally available at the times and in the amounts that our board of directors may determine. All dividends are non-cumulative.

		●	Voting Rights. The holders of our common stock are entitled to one vote for each share of common stock held on all matters submitted to a vote of the stockholders, including the election of directors. Our certificate of incorporation and bylaws do not provide for cumulative voting rights.

		●	No Preemptive or Similar Rights. The holders of our common stock have no preemptive, conversion, or subscription rights, and there are no redemption or sinking fund provisions applicable to our common stock.

		●	Right to Receive Liquidation Distributions. Upon our liquidation, dissolution, or winding-up, the assets legally available for distribution to our stockholders would be distributable ratably among the holders of our common stock, including Class A common stock, outstanding at that time after payment of other claims of creditors, if any.

		●	Fully Paid and Non-Assessable. All of the outstanding shares of our common stock, including Class A common stock, and the Class A Preferred Stock are duly issued, fully paid and non-assessable.


DESCRIPTION OF WARRANTS
The terms relating to any warrants to purchase shares of our common stock or preferred stock, in one or more series together with other securities or separately, will include some or all of the following:
		●	the title of the warrants;

		●	the aggregate number of warrants offered;

		●	the designation, number and terms of the shares of common stock purchasable upon exercise of the warrants and procedures by which those numbers may be adjusted;

		●	the exercise price of the warrants;


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		●	the dates or periods during which the warrants are exercisable;

		●	the designation and terms of any securities with which the warrants are issued;

		●	if the warrants are issued as a unit with another security, the date on and after which the warrants and the other security will be separately transferable;

		●	if the exercise price is not payable in U.S. dollars, the foreign currency, currency unit or composite currency in which the exercise price is denominated;

		●	any minimum or maximum amount of warrants that may be exercised at any one time;

		●	any terms relating to the modification of the warrants;

		●	any terms, procedures and limitations relating to the transferability, exchange or exercise of the warrants; and

		●	any other specific terms of the warrants.


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DESCRIPTION OF DEBT SECURITIES
We may offer debt securities which may be senior, subordinated or junior subordinated and may be convertible. Unless otherwise specified, our debt securities will be issued in one or more series under an indenture to be entered into between us and a trustee. The debt securities will be issued under an indenture to be entered into between us and a trustee. The terms of the debt securities will include those stated in the indenture and those made part of the indenture by reference to the Trust Indenture Act of 1939, as in effect on the date of the indenture. The indenture will be subject to and governed by the terms of the Trust Indenture Act of 1939.
The following description briefly sets forth certain general terms and provisions of the debt securities that we may offer. 
Debt Securities
The aggregate principal amount of debt securities that may be issued under the indenture is unlimited. The debt securities may be issued in one or more series as may be authorized from time to time pursuant to a supplemental indenture entered into between us and the trustee or an order delivered by us to the trustee. Debt securities we offer will be subject to the following terms and conditions of the series of debt securities being offered, to the extent applicable:
		●	title and aggregate principal amount;

		●	whether the debt securities will be senior, subordinated or junior subordinated;

		●	applicable subordination provisions, if any;

		●	provisions regarding whether the debt securities will be convertible or exchangeable into other securities or property of the Company or any other person;

		●	percentage or percentages of principal amount at which the debt securities will be issued;

		●	maturity date(s);

		●	interest rate(s) or the method for determining the interest rate(s);

		●	whether interest on the debt securities will be payable in cash or additional debt securities of the same series;

		●	dates on which interest will accrue or the method for determining dates on which interest will accrue and dates on which interest will be payable;

		●	whether the amount of payment of principal of, premium, if any, or interest on the debt securities may be determined with reference to an index, formula or other method;

		●	redemption, repurchase or early repayment provisions, including our obligation or right to redeem, purchase or repay debt securities under a sinking fund, amortization or analogous provision;

		●	if other than the debt securities’ principal amount, the portion of the principal amount of the debt securities that will be payable upon declaration of acceleration of the maturity;

		●	authorized denominations;

		●	form;


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		●	amount of discount or premium, if any, with which the debt securities will be issued, including whether the debt securities will be issued as “original issue discount” securities;

		●	the place or places where the principal of, premium, if any, and interest on the debt securities will be payable;

		●	where the debt securities may be presented for registration of transfer, exchange or conversion;

		●	the place or places where notices and demands to or upon the Company in respect of the debt securities may be made;

		●	whether the debt securities will be issued in whole or in part in the form of one or more global securities;

		●	if the debt securities will be issued in whole or in part in the form of a book-entry security, the depository or its nominee with respect to the debt securities and the circumstances under which the book-entry security may be registered for transfer or exchange or authenticated and delivered in the name of a person other than the depository or its nominee;

		●	whether a temporary security is to be issued with respect to such series and whether any interest payable prior to the issuance of definitive securities of the series will be credited to the account of the persons entitled thereto;

		●	the terms upon which beneficial interests in a temporary global security may be exchanged in whole or in part for beneficial interests in a definitive global security or for individual definitive securities;

		●	the guarantors, if any, of the debt securities, and the extent of the guarantees and any additions or changes to permit or facilitate guarantees of such debt securities;

		●	any covenants applicable to the particular debt securities being issued;

		●	any defaults and events of default applicable to the debt securities, including the remedies available in connection therewith;

		●	currency, currencies or currency units in which the purchase price for, the principal of and any premium and any interest on, such debt securities will be payable;

		●	time period within which, the manner in which and the terms and conditions upon which the Company or the purchaser of the debt securities can select the payment currency;

		●	securities exchange(s) on which the debt securities will be listed, if any;

		●	whether any underwriter(s) will act as market maker(s) for the debt securities;

		●	extent to which a secondary market for the debt securities is expected to develop;

		●	provisions relating to defeasance;

		●	provisions relating to satisfaction and discharge of the indenture;

		●	any restrictions or conditions on the transferability of the debt securities;

		●	provisions relating to the modification of the indenture both with and without the consent of holders of debt securities issued under the indenture;


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		●	any addition or change in the provisions related to compensation and reimbursement of the trustee;

		●	provisions, if any, granting special rights to holders upon the occurrence of specified events;

		●	whether the debt securities will be secured or unsecured, and, if secured, the terms upon which the debt securities will be secured and any other additions or changes relating to such security; and

		●	any other terms of the debt securities that are not inconsistent with the provisions of the Trust Indenture Act (but may modify, amend, supplement or delete any of the terms of the indenture with respect to such series of debt securities).


General
One or more series of debt securities may be sold as “original issue discount” securities. These debt securities would be sold at a substantial discount below their stated principal amount, bearing no interest or interest at a rate which at the time of issuance is below market rates. One or more series of debt securities may be variable rate debt securities that may be exchanged for fixed rate debt securities.
Debt securities may be issued where the amount of principal and/or interest payable is determined by reference to one or more currency exchange rates, commodity prices, equity indices or other factors. Holders of such debt securities may receive a principal amount or a payment of interest that is greater than or less than the amount of principal or interest otherwise payable on such dates, depending upon the value of the applicable currencies, commodities, equity indices or other factors. 
The term “debt securities” includes debt securities denominated in U.S. dollars or, if applicable, in any other freely transferable currency or units based on or relating to foreign currencies. 
We expect most debt securities to be issued in fully registered form without coupons and in denominations of $1,000 and any integral multiples thereof. Subject to applicable limitations, debt securities that are issued in registered form may be transferred or exchanged at the principal corporate trust office of the trustee, without the payment of any service charge, other than any tax or other governmental charge payable in connection therewith.
Global Securities
The debt securities of a series may be issued in whole or in part in the form of one or more global securities that will be deposited with, or on behalf of, a depositary. Global securities will be issued in registered form and in either temporary or definitive form. Unless and until it is exchanged in whole or in part for the individual debt securities, a global security may not be transferred except as a whole by the depositary for such global security to a nominee of such depositary or by a nominee of such depositary to such depositary or another nominee of such depositary or by such depositary or any such nominee to a successor of such depositary or a nominee of such successor.
Governing Law
The indenture and the debt securities shall be construed in accordance with and governed by the laws of the State of New York.  
DESCRIPTION OF UNITS
We may issue, in one more series, units comprised of shares of our common stock, preferred stock, warrants to purchase common stock or preferred stock, debt securities or any combination of those securities. Each unit will be issued so that the holder of the unit is also the holder of each security included in the unit. Thus, the holder of a unit will have the rights and obligations of a holder of each included security. The unit agreement under which a unit is issued may provide that the securities included in the unit may not be held or transferred separately, at any time or at any time before a specified date.

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We may evidence units by unit certificates that we issue under a separate agreement. We may issue the units under a unit agreement between us and one or more unit agents. If we elect to enter into a unit agreement with a unit agent, the unit agent will act solely as our agent in connection with the units and will not assume any obligation or relationship of agency or trust for or with any registered holders of units or beneficial owners of units. 
The terms of the series of units that may be offered will include:
		●	the designation and terms of the units and of the securities comprising the units, including whether and under what circumstances those securities may be held or transferred separately;

		●	any provisions of the governing unit agreement that differ from those described herein; and

		●	any provisions for the issuance, payment, settlement, transfer or exchange of the units or of the securities comprising the units.


The other provisions regarding our common stock, preferred stock, warrants and debt securities as described in this exhibit will apply to each unit to the extent such unit consists of shares of our common stock, warrants and/or debt securities.

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