Exhibit 4.5

DESCRIPTION OF THE REGISTRANT’S SECURITIES REGISTERED PURSUANT TO SECTION 12 OF THE SECURITIES EXCHANGE ACT OF 1934

As of December 31, 2019, J2 Global, Inc. has one class of securities registered under Section 12 of the Securities Exchange Act of 1934, as amended: our common stock.

The following description of our capital stock is based upon our amended and restated certificate of incorporation (“Certificate of Incorporation”), our amended and restated bylaws (“Bylaws”) and applicable provisions of law. We have summarized certain portions of the Certificate of Incorporation and Bylaws below. The summary is not complete. The Certificate of Incorporation and Bylaws are incorporated by reference as exhibits to the Annual Report on Form 10-K for the year ended December 31, 2019 to which this Description of Registered Securities is an exhibit. You should read the Certificate of Incorporation and Bylaws for the provisions that may be important to you.

General

Our authorized capital stock consists of 95,000,000 shares of common stock, par value $0.01 per share, and 1,000,000 shares of preferred stock, par value $0.01 per share, of which 6,000 are designated as Series A Preferred Stock and 20,000 are designed as Series B Preferred Stock. As of February 25, 2020, J2 Global had 48,712,833 shares of common stock outstanding and no shares of preferred stock outstanding.

Common Stock

Subject to the prior rights of any outstanding preferred stock, the holders of common stock are entitled to receive dividends out of assets legally available for payment of dividends at such times and in such amounts as the Board of Directors may from time to time determine.

Each outstanding share of common stock entitles the holder to one vote on all matters submitted to a vote of stockholders, including the election of our directors, subject to any class or series voting rights granted to the preferred stock. There is no cumulative voting. The Board of Directors is expressly authorized to adopt, amend or repeal the Bylaws in any manner not inconsistent with Delaware law or the Certificate of Incorporation, subject to the power of the stockholders to adopt, amend or repeal the Bylaws. The Certificate of Incorporation may be amended by an affirmative vote of the holders of a majority of our outstanding capital stock entitled to vote on the matter, subject to any class or series voting rights granted to the preferred stock.

The shares of common stock are neither redeemable nor convertible, and the holders of common stock have no preemptive or subscription rights to purchase any of our securities. Upon our liquidation, dissolution or winding up, the holders of common stock are entitled to receive pro rata any of our assets which are legally available for distribution after payment of all debts and other liabilities and subject to any preferential rights of the holders of preferred stock.

Anti-Takeover Provisions

Delaware Law

We are subject to Section 203 of the Delaware General Corporation Law. In general, the statute prohibits a publicly held Delaware corporation from engaging in any business combination with any interested stockholder for a period of three years following the date that the stockholder became an interested stockholder unless:

• prior to that date, our Board of Directors approved either the business combination or the transaction that resulted in the stockholder becoming an interested stockholder;

• upon consummation 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, excluding those shares owned by persons who are directors and also officers and issued under employee stock plans under which employee participants do not have the right to determine confidentially whether shares held subject to the plan will be tendered in a tender or exchange offer; or

• on or subsequent to that date, the business combination is approved by our Board of Directors and is authorized at an annual or special meeting of stockholders, and not by written consent, by the affirmative vote of at least two-thirds of the outstanding voting stock not owned by the interested stockholder.

Section 203 defines business combination to include:

• any merger or consolidation involving the corporation and the interested stockholder;

• any sale, transfer, pledge or other disposition involving the interested stockholder of 10% or more of the assets of the corporation;

• subject to exceptions, any transaction that results in the issuance or transfer by the corporation of any stock of the corporation to the interested stockholder;

• any transaction involving the corporation that has the effect of increasing the proportionate share of the stock or any class or series of the corporation beneficially owned by the interested stockholder; and

• the receipt by the interested stockholder of the benefit of any loans, advances, guarantees, pledges or other financial benefits provided by or through the corporation.

In general, Section 203 defines an interested stockholder as any entity or person beneficially owning 15% or more of the outstanding voting stock of the corporation and any entity or person affiliated with or controlling or controlled by the entity or person.

Certificate of Incorporation and Bylaws Provisions

Certain provisions of our Certificate of Incorporation and Bylaws may delay or discourage transactions involving an actual or potential change in our control or change in our management, including transactions in which stockholders might otherwise receive a premium for their shares, or transactions that our stockholders might otherwise deem to be in their best interests. Therefore, these provisions could adversely affect the price of our common stock. Among other things, our Certificate of Incorporation and Bylaws:

• permit our Board of Directors to issue up to 1,000,000 shares of preferred stock, with any rights, preferences and privileges as they may designate;

• provide that the authorized number of directors may be changed only by resolution of the Board of Directors;

• provide that all vacancies, including newly created directorships, may, except as otherwise required by law, be filled by the affirmative vote of a majority of directors then in office, even if less than a quorum, or by the sole remaining director;

• provide that stockholders seeking to present proposals before a meeting of stockholders or to nominate candidates for election as directors at a meeting of stockholders must provide notice in writing in a timely manner, and also specify requirements as to the form and content of a stockholder’s notice; and

• do not provide for cumulative voting rights (therefore allowing the holders of a majority of the shares of common stock entitled to vote in any election of directors to elect all of the directors standing for election, if they should so choose).

Transfer Agent and Registrar

The transfer agent and registrar for our common stock is Computershare Trust Company, N.A.

NASDAQ Global Select Market Listing

Our common stock is listed on the Nasdaq Global Select Market under the symbol “JCOM.”