EX-4.2

The following description of our capital stock is intended as a summary only and is qualified in its entirety by reference to our certificate of incorporation and bylaws, which are filed as exhibits to the Annual Report on Form 10-K of which this Exhibit 4.2 is a part, and to the applicable provisions of the Delaware General Corporation Law (the “DGCL”).

As of December 31, 2021, our authorized capital stock consisted of 800,000,000 shares of common stock, par value $0.01 per share, and 25,000,000 shares of preferred stock, par value $0.01 per share. Our common stock is listed on the Nasdaq Global Select Market under the symbol “LFST.”

Dividend rights. Subject to preferences that may apply to shares of preferred stock outstanding at the time, holders of outstanding shares of common stock are entitled to receive dividends out of assets legally available at the times and in the amounts as the Board of Directors may determine from time to time.

Voting rights. Each outstanding share of common stock is entitled to one vote on all matters submitted to a vote of stockholders. Holders of shares of our common stock have no cumulative voting rights.

Preemptive rights. Our common stock is not entitled to preemptive or other similar subscription rights to purchase any of our securities.

Conversion or redemption rights. Our common stock is neither convertible nor redeemable.

Liquidation rights. Upon our liquidation, the holders of our common stock will be entitled to receive pro rata our assets that are legally available for distribution, after payment of all debts and other liabilities and subject to the prior rights of any holders of preferred stock then outstanding.

Our Board of Directors may, without further action by our stockholders, from time to time, direct the issuance of shares of preferred stock in series and may, at the time of issuance, determine the designations, powers, preferences, privileges and relative participating, optional or special rights, as well as the qualifications, limitations or restrictions thereof, including dividend rights, conversion rights, voting rights, terms of redemption and liquidation preferences, any or all of which may be greater than the rights of the common stock. Satisfaction of any dividend preferences of outstanding shares of preferred stock would reduce the amount of funds available for the payment of dividends on shares of our common stock. Holders of shares of preferred stock may be entitled to receive a preference payment in the event of our liquidation before any payment is made to the holders of shares of our common stock. Under certain circumstances, the issuance of shares of preferred stock may render more difficult or tend to discourage a merger, tender offer or proxy contest, the assumption of control by a holder of a large block of our securities or the removal of incumbent management. Upon the affirmative vote of a majority of the total number of directors then in office, our Board of Directors, without stockholder approval, may issue shares of preferred stock with voting and conversion rights which could adversely affect the holders of shares of our common stock and the market value of our common stock. Upon consummation of this offering, there

will be no shares of preferred stock outstanding, and we have no present intention to issue any shares of preferred stock.

Our amended and restated certificate of incorporation and our bylaws contain provisions that may delay, defer or discourage another party from acquiring control of us. We expect that these provisions will discourage coercive takeover practices or inadequate takeover bids. These provisions are also designed to encourage persons seeking to acquire control of us to first negotiate with the Board of Directors, which we believe may result in an improvement of the terms of any such acquisition in favor of our stockholders. However, they may also discourage acquisitions that some stockholders may favor.

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Classified board. Our amended and restated certificate of incorporation provides that our Board of Directors is divided with respect to the time for which directors severally hold office into three classes of directors. As a result, approximately one-third of our Board of Directors is elected each year. The classification of directors has the effect of making it more difficult for stockholders to change the composition of our Board of Directors.

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No cumulative voting. The DGCL provides that stockholders are not entitled to the right to cumulate votes in the election of directors unless the certificate of incorporation specifically authorizes cumulative voting. Our amended and restated certificate of incorporation does not authorize cumulative voting.

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Requirements for removal of directors. Directors may only be removed for cause. However, any director who is designated for nomination by a Principal Stockholder (as defined in our Stockholders Agreement, dated June 9, 2021) pursuant to the terms of our stockholders agreement may be removed with or without cause by such Principal Stockholder with the approval of the holders of the majority of the total voting power of the outstanding shares of capital stock entitled to vote generally in the election of directors, subject to the terms of our stockholders agreement.

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Advance notice procedures. Our bylaws establish an advance notice procedure for stockholder proposals to be brought before an annual meeting of our stockholders, including proposed nominations of persons for election to the Board of Directors. Stockholders at an annual meeting will only be able to consider proposals or nominations specified in the notice of meeting or brought before the meeting by or at the direction of the Board of Directors or by a stockholder who was a stockholder of record on the record date for the meeting, who is entitled to vote at the meeting and who has given our secretary timely written notice, in proper form, of the stockholder’s intention to bring that business before the meeting. Although our bylaws do not give the Board of Directors the power to approve or disapprove stockholder nominations of candidates or proposals regarding other business to be conducted at a special or annual meeting, the bylaws may have the effect of precluding the conduct of certain business at a meeting if the proper procedures are not followed or may discourage or deter a potential acquirer from conducting a solicitation of proxies to elect its own slate of directors or otherwise attempting to obtain control of our Company.

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Actions by written consent; special meetings of stockholders. Our amended and restated certificate of incorporation provides that, following the date on which our Principal Stockholders no longer beneficially own a majority of our common stock, stockholder action can be taken only

at an annual or special meeting of stockholders and cannot be taken by written consent in lieu of a meeting. Our amended and restated certificate of incorporation also provides that, except as otherwise required by law, special meetings of the stockholders can only be called by or at the direction of the Board of Directors pursuant to a resolution approved by a majority of the entire Board of Directors.

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Supermajority approval requirements. Certain amendments to our certificate of incorporation and shareholder amendments to our bylaws will require the affirmative vote of at least two-thirds of the voting power of the outstanding shares of our capital stock entitled to vote thereon.

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Authorized but unissued shares. Our authorized but unissued shares of common and preferred stock are available for future issuance without stockholder approval. The existence of authorized but unissued shares of preferred stock could render more difficult or discourage an attempt to obtain control of us by means of a proxy contest, tender offer, merger or otherwise.

Our amended and restated certificate of incorporation provides that, subject to limited exceptions, the state or federal courts within the State of Delaware will be exclusive forums for (1) any derivative action or proceeding brought on our behalf, (2) any action asserting a claim of breach of a fiduciary duty owed by any of our directors, officers or other employees to us or our stockholders, (3) any action asserting a claim against us arising pursuant to any provision of the DGCL, our amended and restated certificate of incorporation or our amended and restated by-laws, (4) any action to interpret, apply, enforce or determine the validity of our amended and restated certificate of incorporation or our amended and restated bylaws or (5) any other action asserting a claim against us that is governed by the internal affairs doctrine; provided that, the exclusive forum provision will not apply to suits brought to enforce any liability or duty created by the Exchange Act or to any claim for which the federal courts have exclusive jurisdiction. Our amended and restated certificate of incorporation also provides that, unless we consent in writing to the selection of an alternative forum, the U.S. federal district courts shall be the exclusive forum for the resolution of any claims arising under the Securities Act. Although we believe these provisions benefit us by providing increased consistency in the application of Delaware and certain federal securities law, these provisions may have the effect of discouraging lawsuits against our directors and officers.

We have elected in our certificate of incorporation not to be subject to Section 203 of the DGCL (“Section 203”), an antitakeover law. In general, Section 203 prohibits a publicly held Delaware corporation from engaging in a business combination, such as a merger, with a person or group owning 15% or more of the corporation’s outstanding voting stock for a period of three years following the date the person became an interested stockholder, unless (with certain exceptions):

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upon the completion of the transaction that resulted in the stockholder becoming an interested stockholder, the interested stockholder owned at least 85% of the voting stock of the corporation outstanding at the time the transaction commenced, calculated pursuant to Section 203; or

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at or subsequent to the date of the transaction, the business combination is approved by the board of directors of the corporation and authorized at an annual or special meeting of the stockholders, and not by written consent, by the affirmative vote of at least two-thirds of the outstanding voting stock which is not owned by the interested stockholder.

While we will not be subject to any anti-takeover effects of Section 203, our certificate of incorporation contains provisions that have the same effect as Section 203, except that they provide that investment funds affiliated with our Principal Stockholders will not be deemed to be an “interested stockholder,” regardless of the percentage of our voting stock owned by investment funds affiliated with our Principal Stockholders, and accordingly we will not be subject to such restrictions.

Our amended and restated certificate of incorporation provides that we renounce any interest or expectancy in the business opportunities of our Principal Stockholders and each of their respective partners, principals, directors, officers, members, managers and/or employees, including any of the foregoing who serve as officers or directors of the Company, and each such party shall not have any obligation to offer us those opportunities unless presented to one of our directors or officers in his or her capacity as a director or officer.

Our certificate of incorporation limits the liability of our directors and officers to the fullest extent permitted by Delaware law and requires that we will provide them with customary indemnification. We have also entered into customary indemnification agreements with each of our directors that provide them, in general, with customary indemnification in connection with their service to us or on our behalf. Insofar as indemnification for liabilities arising under the Securities Act may be permitted to directors, we have been informed that in the opinion of the SEC such indemnification is against public policy and is therefore unenforceable. We also maintain officers’ and directors’ liability insurance that insures against liabilities that our officers and directors may incur in such capacities.