Description of Registrants Securities

    As of February 19, 2021, Par Pacific Holdings, Inc. (the “Company,” “us,” “we,” or “our”) has one class of securities, our common stock, registered under Section 12 of the Securities Exchange Act of 1934, as amended.

The following description of our common stock is a summary and does not purport to be complete. It is subject to and qualified in its entirety by reference to our Restated Certificate of Incorporation dated October 20, 2015 (the “Certificate of Incorporation”) and our Second Amended and Restated Bylaws dated October 20, 2015 (the “Bylaws”), as well as our stockholders agreement, the allocation agreement with certain of our stockholders (the “Allocation Agreement”), the indenture (the “Convertible Notes Indenture”) under which we issued our 5.00% convertible senior notes due 2021 (the “Convertible Notes”), the registration rights agreement (the “Registration Rights Agreement”) we entered into with certain of our stockholders in August 2012, the registration rights agreement (the “Convertible Notes Registration Rights Agreement”) with respect to the issuance (the “Convertible Notes Offering”) of our Convertible Notes, the registration rights agreement (the “Bridge Notes Registration Rights Agreement”) with respect to the issuance of our 2.50% convertible subordinated bridge notes on September 23, 2016 (the “Bridge Notes”), each of which are incorporated by reference as an exhibit to the Annual Report on Form 10-K of which this Exhibit 4.25 is a part. We encourage you to read our Certificate of Incorporation, our Bylaws, our stockholders agreement, the Allocation Agreement, the Convertible Notes Indenture, the Registration Rights Agreement, the Convertible Notes Registration Rights Agreement, the Bridge Notes Registration Rights Agreement, and the applicable provisions of the General Corporation Law of the State of Delaware (the “DGCL”) for additional information.

As of February 19, 2021, our authorized capital consisted of 500,000,000 shares of common stock, par value $0.01 per share, of which 54,026,991 shares were issued and outstanding, and 3,000,000 shares of undesignated preferred stock, par value $0.01 per share, none of which were outstanding.

Holders of our common stock are entitled to one vote per share in the election of directors and on all other matters submitted to a vote of stockholders. Such holders do not have the right to cumulate their votes in the election of directors. Holders of our common stock have no redemption or conversion rights, no preemptive or other rights to subscribe for our securities and are not entitled to the benefits of any sinking fund provisions. In the event of our liquidation, dissolution or winding-up, holders of our common stock are entitled to share equally and ratably in all of the assets remaining, if any, after satisfaction of all our debts and liabilities, and of the preferential rights of any series of preferred stock then outstanding. Subject to preferences that may be applicable to any then outstanding preferred stock, holders of our common stock are entitled to receive dividends when, as and if declared by the Company’s board of directors (the “Board”) out of funds legally available therefor.

The Certificate of Incorporation contains restrictions on the transfer of the Company Securities (as defined therein, and which includes our common stock) by holders who are, or would become as a result of such transfer, a Five-Percent Shareholder (as defined in the Certificate of Incorporation). Such restrictions were put in place in order to preserve our net operating loss carryovers, capital loss carryovers, general business credit carryovers, alternative minimum tax credit carryovers and foreign tax credit carryovers, as well as any “net unrealized built-in loss” within the meaning of Section 382 of the Internal Revenue Code of 1986, as amended.

On November 10, 2014, as permitted by the terms of Article 11 of the Certificate of Incorporation, we entered into the Allocation Agreement with Zell Credit Opportunities Master Fund, L.P. (“ZCOF”), ZCOF Par Petroleum Holdings, L.L.C. and Whitebox Multi-Strategy Partners, L.P. to reallocate the proportionate amount of our common stock that the Five-Percent Shareholders are permitted to transfer among our remaining Five-Percent Shareholders. In accordance with Article 11 of the Certificate of Incorporation, the Board has approved, on a prospective basis, one or more Transfers (as defined in the Certificate of Incorporation) of shares of our common stock by the remaining Five-Percent Shareholders up to the new allocation amounts included on a schedule to the Allocation Agreement.

The Board is authorized to establish one or more series of preferred stock and to determine, with respect to any series of preferred stock, the powers, designation, preferences and rights of each series and the qualifications, limitations or restrictions of each series, including:

The authorized shares of preferred stock, as well as shares of common stock, are available for issuance without further action by our stockholders, unless stockholder action is required by the rules of any stock exchange or automated quotation system on which our securities are listed or traded. If the approval of our stockholders is not required for the issuance of shares of preferred stock or common stock, the Board may determine not to seek stockholder approval.

Although the Board has no intention at the present time of doing so, it could issue a series of preferred stock that could, depending on the terms of that series, impede the completion of a merger, tender offer or other takeover attempt. The Board will make any determination to issue shares based on its judgment as to our best interests and the best interests of our stockholders. The Board, in so acting, could issue preferred stock having terms that could discourage an acquisition attempt, including a tender offer or other transaction that some, or a majority of, our stockholders might believe to be in their best interests or that might result in stockholders receiving a premium for their stock over the then current market price of the stock.

    On June 21, 2016, the Convertible Notes were issued pursuant to the Convertible Notes Indenture. The Convertible Notes bear interest of 5.00% per year from June 21, 2016 (payable semi-annually in arrears on June 15 and December 15 of each year, beginning on December 15, 2016), and will mature on June 15, 2021.

The Convertible Notes are convertible at an initial conversion rate of 55.5556 shares of our common stock per $1,000 principal amount of the Convertible Notes, which is equivalent to an initial conversion price of approximately $18.00 per share of common stock. The conversion rate is subject to adjustment in some events. In

addition, following certain corporate events that occur prior to the maturity date, the Company will increase, in certain circumstances, the conversion rate for a holder who elects to convert its Convertible Notes in connection with such a corporate event. Upon conversion, the Company may satisfy its conversion obligation by paying or delivering, as applicable, cash, shares of its common stock or a combination of cash and shares of its common stock, at its election, provided, however, that if the Board determines in good faith that the issuance of any shares of common stock in any conversion or in respect of any make-whole premium would cause the Company to undergo an “ownership change” as defined in Section 382 of the Internal Revenue Code of 1986, as amended, and the Treasury Regulations promulgated thereunder, then the Company will be required to settle such conversions or make-whole premium in cash or in a combination of cash and shares of common stock to the extent of such determination. If a “fundamental change” (as described in the Convertible Notes Indenture) occurs, then holders of the Convertible Notes may, subject to certain restrictions, require the Company to repurchase for cash all or part of the Convertible Notes in principal amounts of $1,000 or an integral multiple thereof at a repurchase price equal to 100% of the principal amount of the Convertible Notes to be repurchased, plus accrued and unpaid interest.

As of February 19, 2021, there was $48.7 million aggregate principal amount of Convertible Notes outstanding.

As noted above, because our stockholders do not have cumulative voting rights, stockholders holding a majority of the shares of common stock outstanding will be able to elect all of our directors. The Certificate of Incorporation and the Bylaws provide that only the chairman of the Board, the chief executive officer, or any officer upon the written request of a majority of the Board, may call a special meeting of the stockholders.

The Certificate of Incorporation requires a 66 2/3% stockholder vote for the amendment or repeal of certain provisions of the Certificate of Incorporation relating to the liability of directors, indemnification of officers and directors, and the transfer restrictions noted above. The Bylaws require a 66 2/3% stockholder vote for the amendment or repeal of certain provisions of the Bylaws. The combination of the lack of cumulative voting and the 66 2/3% stockholder voting requirements will make it more difficult for existing stockholders to replace the Board as well as for another party to obtain control of us by replacing the Board. Because the Board has the power to retain and discharge our officers, these provisions could also make it more difficult for existing stockholders or another party to effect a change in management. In addition, the authorization of undesignated preferred stock makes it possible for the Board to issue preferred stock with voting or other rights or preferences that could impede the success of any attempt to change control of us.

These provisions may have the effect of deterring hostile takeovers or delaying changes in control or management of us. These provisions are intended to enhance the likelihood of continued stability in the composition of the Board and its policies and to discourage certain types of transactions that may involve an actual or threatened acquisition of us. These provisions are designed to reduce our vulnerability to an unsolicited acquisition proposal. The provisions also are intended to discourage certain tactics that may be used in proxy fights. However, such provisions could have the effect of discouraging others from making tender offers for our shares and, as a consequence, they also may inhibit fluctuations in the market price of our shares that could result from actual or rumored takeover attempts. Such provisions may also have the effect of preventing changes in our management.

As noted above, the Certificate of Incorporation contains restrictions on the transfer of Company Securities by holders who are, or would become as a result of such transfer, Five-Percent Shareholders. These restrictions on transfer may have the effect of preserving effective control of us by our principal stockholders and preserving the tenure of the board of directors and management.

In addition, we are subject to Section 203 of the DGCL which prohibits a Delaware corporation from engaging in any business combination with any interested stockholder for a period of three years after the date that such stockholder became an interested stockholder, with the following exceptions:

In general, Section 203 of the DGCL defines business combination to include the following:

In general, Section 203 of the DGCL defines an “interested stockholder” as an entity or person who, together with the person’s affiliates and associates, beneficially owns, or is an affiliate or associate of the corporation and within three years prior to the time of determination of interested stockholder status did own, 15% or more of the outstanding voting stock of the corporation.

We entered into a stockholders agreement in April 2015 for the benefit of the holders of any of our securities entitled to vote for members of the Board providing that in the event that we are no longer required to file annual and quarterly reports with the SEC, we will provide, as soon as reasonably practicable, comparable audited reports on an annual basis, unaudited reports on a quarterly basis (which annual and quarterly reports shall contain substantially similar descriptions of business and management discussion and analysis provisions as are then required to be included in relevant filings with the SEC), and earnings releases on a quarterly basis, made available to such holders through a secure website and subject to a standard click-through access and confidentiality agreement.

The Company and certain of our stockholders (the “Rights Holders”), including affiliates of ZCOF and Whitebox Advisors, LLC (“Whitebox”), are parties to the Registration Rights Agreement providing the Rights Holders with certain registration rights.

Pursuant to the Registration Rights Agreement, among other things, any Rights Holder or group of Rights Holders that, together with its or their affiliates, holds more than fifteen percent (15%) of the Registrable Shares (as defined in the Registration Rights Agreement), will have the right to require the Company to file with the SEC, a

registration statement on Form S-1 or S-3, or any other appropriate form under the Securities Act or the Exchange Act for a public offering of all or part of its Registrable Shares (a “Demand Registration”) by delivery of written notice to the Company (a “Demand Request”).

Within 90 days after receiving the Demand Request, we are required to file with the SEC the registration statement, on any form for which we then qualify and which is available for the sale of the Registrable Shares in accordance with the intended methods of distribution thereof, with respect to the Demand Registration. We are required to use commercially reasonable efforts to cause the registration statement to be declared effective as soon as practicable after such filing. We will not be obligated (i) to effect a Demand Registration within ninety (90) days after the effective date of a previous Demand Registration, other than for a shelf registration, or (ii) to effect a Demand Registration unless the Demand Request is for a number of Registrable Shares with an expected market value that is equal to at least (x) $15 million as of the date of such Demand Request or is for one hundred percent of the demanding holders’ Registrable Shares with respect to any demand registration made on Form S-1 or (y) $5 million as of the date of such Demand Request with respect to any Demand Registration made on Form S-3.

Upon receipt of any Demand Request, we are required to give written notice, within ten (10) days of such Demand Request, to all other holders of Registrable Shares, who will have the right to elect to include in any subsequent Demand Registration such portion of their Registrable Shares as they may request, subject to certain exceptions.

In addition, subject to certain exceptions, if we propose to register any class of our common stock for sale to the public, we are required, subject to certain conditions, to include all Registrable Shares with respect to which the Company has received written requests for inclusion.

The rights of a holder of Registrable Shares may be transferred, assigned or otherwise conveyed to any transferee or assignee of such Registrable Shares, subject to applicable state and federal securities laws and regulations and the Certificate of Incorporation. We will be responsible for expenses relating to the registrations contemplated by the Registration Rights Agreement.

The registration rights granted in the Registration Rights Agreement are subject to customary indemnification and contribution provisions, as well as customary restrictions such as suspension periods and, if a registration is for an underwritten offering, limitations on the number of shares to be included in the underwritten offering imposed by the managing underwriter.

Pursuant to the Registration Rights Agreement, a registration statement relating to resales by affiliates of ZCOF and Whitebox of the shares received by them in connection with our emergence from bankruptcy on August 31, 2012 was declared effective by the SEC on June 23, 2015.

In connection with the closing of the Convertible Notes Offering, we entered into a registration rights agreement with the initial purchasers under which we agreed for the benefit of the holders of the Convertible Notes and any shares of our common stock issuable upon conversion of the Convertible Notes or in respect of any make-whole premium that we will, at our cost, file a shelf registration statement covering resales of any shares of our common stock issuable upon conversion of the Convertible Notes and in respect of any make-whole premium.

The registration statement required by the terms of the Convertible Notes Registration Rights Agreement was declared effective by the SEC on November 30, 2016.

We may suspend the effectiveness of the shelf registration statement or the use of the prospectus that is part of the shelf registration statement during specified periods under certain circumstances relating to pending corporate developments, public filings with the SEC and similar events. We need not specify the nature of the event giving rise to a suspension in any suspension notice to holders of the Convertible Notes. Each holder, by its acceptance of

the Convertible Notes, agrees to hold any such suspension notice in response to a notice of a proposed sale in confidence. Except in the case of a suspension period as the result of the filing of a post-effective amendment solely to add additional selling security holders, any suspension period may not exceed an aggregate of 30 days in any 90-day period or 60 days in any 360-day period. However, if the disclosure relates to a proposed or pending material business transaction, the disclosure of which the Board determines in good faith would be reasonably likely to impede our ability to consummate such transaction, or would otherwise be seriously detrimental to us and our subsidiaries taken as a whole, we may extend the suspension period from 30 days to 45 days in any 90-day period or from 60 days to 90 days in any 360-day period.

If a registration default occurs, predetermined liquidated damages will accrue on the Convertible Notes, from, and including, the day following such registration default to, but excluding, the earlier of (1) the day on which such registration default has been cured and (2) the date the registration statement is no longer required to be kept effective for our common stock. The liquidated damages will be paid to those entitled to interest payments on such dates semiannually in arrears on each June 15 and December 15 and will accrue at a rate per year equal to:

We will not pay liquidated damages on any Convertible Note after it has been converted into shares of our common stock. If a Convertible Note ceases to be outstanding during a registration default (as a result of the holder exercising its conversion rights or otherwise), we will prorate the liquidated damages to be paid with respect to that Convertible Note.

In no event will liquidated damages exceed 0.50% per year. If a holder converts some or all of its Convertible Notes and we issue any shares of our common stock to satisfy all or any portion of our conversion obligation or if we issue any shares of our common stock in respect of any make-whole premium, in each case, when there exists a registration default, such holder will not be entitled to receive liquidated damages on such common stock, and we will instead increase the conversion rate or the amount of such make-whole premium, as the case may be, by 3% for each $1,000 principal amount of Convertible Notes. If a registration default occurs after a holder has converted its Convertible Notes into shares of our common stock or after we have issued shares of our common stock in respect of any make-whole premium, such holder will not be entitled to any compensation with respect to such common stock. Other than our obligations to pay liquidated damages, we will not have any liability for damages with respect to a registration default on any registrable securities.

In connection with the issuance of the Bridge Notes, we entered into the Bridge Notes Registration Rights Agreement with the purchasers of the Bridge Notes (the “Bridge Notes Purchasers”). The Bridge Notes Registration Rights Agreement required us (i) to file, no later November 11, 2016, with the SEC a shelf registration statement covering resales of the shares of our common stock, if any, issuable upon (1) conversion of the Bridge Notes, (2) exercise of subscription rights by any Bridge Note Purchaser or its affiliates pursuant to our 2016 subscription rights offering, and (3) a stock dividend or stock split or in connection with any combination of shares, recapitalization, merger, consolidation or other reorganization, other than shares freely tradeable without any limitations or restrictions under the Securities Act, (ii) to use our commercially reasonable efforts to cause such shelf registration statement to be declared effective by the SEC no later than (A) January 6, 2017 or (B) if earlier, five business days after the date on which the SEC informs us that it will not review the shelf registration statement, and (iii) to use our commercially reasonable efforts to keep such shelf registration statement effective until the earlier of (A) the date on which all of such shares have been sold, (B) the date on which such shares may be sold without volume restrictions under Rule 144 of the Securities Act, or (C) the third anniversary of the effective date of such shelf registration statement.

If we do not fulfill our obligations under the Bridge Notes Registration Rights Agreement with respect to the filing deadline, effectiveness deadline or effectiveness period of a registration statement, we will be required to pay the holders of the Bridge Notes liquidated damages in an amount in cash equal to 1.00% of such holder’s “Allocated Purchase Price,” which is the amount effectively paid by such holder for the common stock acquired upon conversion of the Bridge Notes, per calendar month or portion thereof prior to the cure of such event of default. The maximum payment of liquidated damages to any such holder associated with all events of default will not exceed 5.00% of such holder’s Allocated Purchase Price.

The registration statement required by the terms of the Bridge Notes Registration Rights Agreement was declared effective by the SEC on December 21, 2016.

Our common stock is quoted on the NYSE under the symbol “PARR.”

American Stock Transfer & Trust Company is the transfer agent and registrar for our common stock.