Exhibit



Exhibit 4.1



DESCRIPTION OF CAPITAL STOCK
The following is a summary of all material characteristics of the capital stock of Tandem Diabetes Care, Inc., as set forth in our Amended and Restated Certificate of Incorporation, as amended, or our Charter, and our Amended and Restated Bylaws, as amended, or our Bylaws.  References to "we," "us," and "our" refer to Tandem Diabetes Care, Inc.  The summary does not purport to be complete and is qualified in its entirety by reference to our Charter and Bylaws, copies of which have been filed as exhibits to our public filings with the Securities and Exchange Commission. 
Common Stock
General. We may issue shares of our common stock from time to time. We are authorized to issue 200,000,000 shares of common stock, par value $0.001 per share. 
Dividend Rights. Subject to preferences that may apply to any shares of preferred stock outstanding at the time, the holders of outstanding shares of our 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.
Voting Rights. Holders of our common stock are entitled to one vote per share. We have not provided for cumulative voting for the election of directors in our Charter. The board of directors is divided into three classes. Each director is elected for a three-year term with one class being elected at each year’s annual meeting of stockholders.
No Preemptive or Similar Rights. Our common stock is not entitled to preemptive rights, and is not subject to redemption. There are no sinking fund provisions applicable to our common stock.
Conversion. Our common stock is not convertible into any other shares of our capital stock.
Right to Receive Liquidation Distributions. Upon our liquidation, dissolution, distribution of assets or winding-up, the assets legally available for distribution to our stockholders would be distributable ratably among the holders of our common stock and any participating preferred stock outstanding at that time, if any, after payment of liquidation preferences, if any, on any outstanding shares of preferred stock and payment of claims of creditors.
Preferred Stock
Pursuant to the terms of our Charter, our board of directors is authorized, subject to limitations prescribed by Delaware law, to issue up to 5,000,000 shares of preferred stock, par value $0.001 per share, in one or more series, to establish from time to time the number of shares to be included in each series, and to fix the designation, powers, preferences and rights of the shares of each series and any of its qualifications, limitations or restrictions, in each case without further action by our stockholders. Our board of directors also can increase or decrease the number of shares of any series of preferred stock, but not below the number of shares of that series then outstanding. Our board of directors may authorize the issuance of preferred stock with voting or conversion rights that could adversely affect the voting power or other rights of the holders of our common stock. The issuance of preferred stock, while providing flexibility in connection with possible acquisitions and other corporate purposes, could, among other things, have the effect of delaying, deferring or preventing a change in our control or the removal of management and could adversely affect the market price of our common stock and the voting and other rights of the holders of our common stock.
The Delaware General Corporation Law, or the DGCL, provides that the holders of preferred stock will have the right to vote separately as a class on any proposed fundamental change in the rights of the preferred stock. This right is in addition to any voting rights that may be provided for in the applicable certificate of designation.
Delaware Law and Certain Charter and Bylaw Provisions
The provisions of Delaware law, as well as certain terms of our Charter and Bylaws, may have the effect of delaying, deferring or discouraging another person from acquiring control of us by means of a tender offer, a proxy contest or otherwise, or removing incumbent officers and directors. These provisions, some of which are summarized below, are expected to discourage certain types of coercive takeover practices and takeover bids that our board of directors may consider inadequate and to encourage any person seeking to acquire control of us to first negotiate with our board of directors.






Exhibit 4.1



Delaware Law. We are governed by the provisions of Section 203 of the DGCL. In general, Section 203 prohibits a public Delaware corporation from engaging in a “business combination” with an “interested stockholder” for a period of three years after the date such stockholder became an “interested stockholder.” A “business combination” includes mergers, asset sales or other transactions resulting in a financial benefit to the stockholder. An “interested stockholder” is a person who, together with affiliates and associates, owns, or within three years did, prior to the determination of interested stockholder status, own, 15% or more of the corporation’s outstanding voting stock. 
Charter and Bylaw Provisions. Our Charter and Bylaws include a number of provisions that could deter hostile takeovers or delay or prevent changes in control of our management team, including the following:
		
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	Issuance of Undesignated Preferred Stock. Our board of directors will have the authority, without further action by our stockholders, to issue up to 5,000,000 shares of undesignated preferred stock with rights and preferences designated from time to time by our board of directors. Our board of directors may utilize such shares for a variety of corporate purposes.  See the section entitled “Preferred Stock”.




		
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	Classified Board. Our Charter and Bylaws provide that our board is classified into three classes of directors. 




		
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	Stockholder Action; Special Meeting of Stockholders. Our Charter eliminates the right of stockholders to act by written consent. Our Charter further provides that special meetings of our stockholders may be called only by a majority of our board of directors.




		
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	Advance Notice Requirements for Stockholder Proposals and Director Nominations. Our Charter and Bylaws provide advance notice procedures for stockholders seeking to bring business before our annual meeting of stockholders, or to nominate candidates for election as directors at our annual meeting of stockholders. 




		
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	Amendment. Our Charter and Bylaws provide that the affirmative vote of the holders of at least 66 2/3% of our voting stock then outstanding is required to amend certain provisions.




		
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	Size of Board and Vacancies. Our Charter and Bylaws provide that the number of directors on our board of directors is fixed exclusively by our board of directors. Newly created directorships resulting from any increase in our authorized number of directors, and any vacancies resulting from death, resignation, retirement, disqualification, removal from office or other cause, will generally be filled by a majority of our board of directors then in office.




		
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	No Cumulative Voting. The DGCL provides that stockholders are denied the right to cumulate votes in the election of directors unless our Charter provides otherwise. Our Charter does not provide for cumulative voting.