EXHIBIT 3.1

SONNET BIOTHERAPEUTICS HOLDINGS, Inc.

CERTIFICATE OF DESIGNATION OF PREFERENCES,

RIGHTS AND LIMITATIONS

OF

SERIES 5 CONVERTIBLE PREFERRED STOCK

PURSUANT TO SECTION 151 OF THE

delaware GENERAL CORPORATION LAW

The undersigned, Raghu Rao, does hereby certify that:

1. The undersigned is the Interim Chief Executive Officer of Sonnet BioTherapeutics Holdings, Inc., a Delaware corporation (the “Corporation”).

2. The Corporation is authorized to issue 5,000,000 shares of preferred stock, $0.0001 par value per share.

3. On July 11, 2025, the following resolutions were duly adopted by the board of directors of the Corporation (the “Board of Directors”):

WHEREAS, the Corporation’s Certificate of Incorporation, as amended, authorizes the issuance of 5,000,000 shares of undesignated preferred stock, $0.0001 par value per share, issuable from time to time in one or more series; and

WHEREAS, the Board of Directors is authorized to divide the preferred stock into any number of series, fix the number of shares constituting such series and the designation of such series, and the powers (including voting powers, if any), preferences and relative, participating, optional and other special rights, if any, and any qualifications, limitations or restrictions thereof, of the shares of such series; and

WHEREAS, it is the desire of the Board of Directors, pursuant to its authority as aforesaid, to fix the designation and number of a series of the preferred stock and to determine the designation, relative rights, preferences and limitations thereof, which shall consist of 7,500 shares of the preferred stock which the Corporation has the authority to issue, as follows:

NOW, THEREFORE, BE IT RESOLVED, that the Board of Directors does hereby provide for the issuance of a series of preferred stock for cash or exchange of other securities, rights or property and does hereby fix and determine the powers, designations, rights, preferences, restrictions and other matters relating to such series of preferred stock as follows: 

TERMS OF PREFERRED STOCK

Section 1.   Definitions. For the purposes hereof, the following terms shall have the following meanings:

“Affiliate” means any Person that, directly or indirectly through one or more intermediaries, controls or is controlled by or is under common control with a Person as such terms are used in and construed under Rule 405 under the Securities Act.

“Alternate Consideration” shall have the meaning set forth in Section 7(d).

“Beneficial Ownership Limitation” shall have the meaning set forth in Section 6(d).

“Business Day” means any day other than Saturday, Sunday or other day on which commercial banks in The City of New York are authorized or required by law to remain closed; provided, however, for clarification, commercial banks shall not be deemed to be authorized or required by law to remain closed due to “stay at home”, “shelter-in-place”, “non-essential employee” or any other similar orders or restrictions or the closure of any physical branch locations at the direction of any governmental authority so long as the electronic funds transfer systems (including for wire transfers) of commercial banks in The City of New York are generally open for use by customers on such day.

“Buy-In” shall have the meaning set forth in Section 6(b)(ii).

“Buy-In Adjustment Amount” shall have the meaning set forth in Section 6(b)(ii).

“Commission” means the United States Securities and Exchange Commission.

“Common Stock” means the Corporation’s common stock, par value $0.0001 per share, and stock of any other class of securities into which such securities may hereafter be reclassified or changed.

“Common Stock Equivalents” means any securities of the Corporation or the Subsidiaries which would entitle the holder thereof to acquire at any time Common Stock, including, without limitation, any debt, preferred stock, right, option, warrant or other instrument that is at any time convertible into or exercisable or exchangeable for, or otherwise entitles the holder thereof to receive, Common Stock.

“Covering Shares” shall have the meaning set forth in Section 6(b)(ii).

“Conversion Amount” means the sum of the Stated Value at issue.

“Conversion Date” shall have the meaning set forth in Section 6(a).

“Conversion Price” shall have the meaning set forth in Section 6(b).

“Conversion Shares” means, collectively, (i) the shares of Common Stock issuable upon conversion of the shares of Preferred Stock in accordance with the terms hereof and (ii) any capital stock or other securities into which such shares of Common Stock are changed and any capital stock or other securities resulting from or compromising a reclassification, combination or subdivision of, or a stock dividend on, any such shares of Common Stock.

“Exchange Act” means the Securities Exchange Act of 1934, as amended, and the rules and regulations promulgated thereunder.

“Fundamental Transaction” shall have the meaning set forth in Section 7(d).

“Holder” shall have the meaning set forth in Section 2.

“Junior Securities” means, collectively, the Common Stock and any other class of securities that is specifically designated as junior to the Series 5 Preferred Stock.

“Liquidation” shall have the meaning set forth in Section 5.

“Notice of Conversion” shall have the meaning set forth in Section 6(a).

“Original Issue Date” means the date of the first issuance of any shares of the Preferred Stock regardless of the number of transfers of any particular shares of Preferred Stock and regardless of the number of certificates, if any, which may be issued to evidence such Preferred Stock.

“Person” means an individual or corporation, partnership, trust, incorporated or unincorporated association, joint venture, limited liability company, joint stock company, government (or an agency or subdivision thereof) or other entity of any kind.

“Preferred Stock” shall have the meaning set forth in Section 2.

“Purchase Agreement” means the Securities Purchase Agreement, dated as of July 11, 2025, among the Corporation and the original Holders, as amended, modified or supplemented from time to time in accordance with its terms.

“Securities Act” means the Securities Act of 1933, as amended, and the rules and regulations promulgated thereunder.

“Share Delivery Date” shall have the meaning set forth in Section 6(c).

“Stated Value” shall have the meaning set forth in Section 2.

“Stockholder Approval” means such stockholder approval as may be required by the applicable rules and regulations of the Nasdaq Stock Market (or any successor entity) with regard to the issuance of the Preferred Stock and related Warrants, and such other proposals as reasonably determined by the Company and the Holders.

“Stockholder Approval Date” means the Trading Day that Stockholder Approval is received and deemed effective under Delaware law.

“Successor Entity” shall have the meaning set forth in Section 7(d).

“Trading Day” means a day on which the principal Trading Market is open for trading.

“Trading Market” means any of the following markets or exchanges on which the Common Stock is listed or quoted for trading on the date in question: the NYSE American, the Nasdaq Capital Market, the Nasdaq Global Market, the Nasdaq Global Select Market, the New York Stock Exchange, the Pink Open Market, OTCQB or OTCQX (or any successors to any of the foregoing).

“Transfer Agent” means Securities Transfer Corporation, the current transfer agent of the Corporation and any successor transfer agent of the Corporation.

“Warrants” means, collectively, the Common Stock purchase warrants issued in accordance with Section 2.2 of the Purchase Agreement.

Section 2. Designation, Amount and Par Value. The series of preferred stock shall be designated as Series 5 Convertible Preferred Stock (the “Preferred Stock”) and the number of shares so designated shall be 7,500 (which shall not be subject to increase without the written consent of the holders of a majority of the then outstanding shares of the Preferred Stock voting as a separate class (each, a “Holder” and collectively, the “Holders”)). Each share of Preferred Stock shall have a par value of $0.0001 per share and a stated value equal to $1,000 (the “Stated Value”).

Section 3. Dividends.

3.1 Holders of record as they appear on the books of the Corporation on the fifteenth (15^th) day (a “Preferential Dividend Record Date”) immediately preceding the applicable Preferential Dividend Payment Date (as defined below) shall be entitled to receive, and the Corporation shall pay, out of funds or property legally available therefor under Delaware law, cumulative dividends (“Preferential Dividends”) at the rate per share of 6.0% per annum (as a percentage of the Stated Value per share) (the “Preferential Dividend Rate”) computed on the basis of a 360-day year and twelve 30-day months, and shall be payable quarterly in arrears for the previous calendar quarter on March 15, June 15, September 15 and December 15 of each year, beginning on the first such date after the date hereof (if any Preferential Dividend Payment Date is not a Business Day, the applicable payment shall be due on the next succeeding Business Day) (each such date, a “Preferential Dividend Payment Date”). The Preferential Dividends shall be mandatorily paid, in accordance with Section 3.2, by the Corporation to the fullest extent permitted by applicable law and out of funds lawfully available therefor. Preferential Dividends on the Preferred Stock shall commence accruing on the issuance date of such Preferred Stock.

3.2 Preferential Dividends shall be payable quarterly in arrears for the previous calendar quarter at the election of the Corporation, either (i) in cash out of funds or property legally available therefor under Delaware law, (ii) in shares of Common Stock (subject to the limitations set forth in Section 6(d)) determined by dividing the dollar amount of the Preferential Dividends by the Conversion Price, or (iii) accrue and compound, in an amount equal to the Preferential Dividend Rate multiplied by the Stated Value, before any dividends shall be declared, set apart for or paid upon the Common Stock or any other any class of stock ranking as to dividends, redemption or distribution of assets upon a Liquidation (as defined in Section 5) junior to the Preferred Stock. As of 5:00 p.m., New York City time (the “Close of Business”) on each Preferential Dividend Payment Date, the dollar amount of the Preferential Dividends (regardless of whether or not declared) that have accumulated on the Preferred Stock for the previous calendar quarter will automatically without any further action by the Corporation or the Holders be added, effective immediately before the Close of Business on the related Preferential Dividend Payment Date, to the Stated Value of each share of Preferred Stock outstanding as of such time; provided, however, that such addition shall not occur nor be required if as of the Close of Business on such Preferential Dividend Payment Date, the Corporation, in its sole and absolute discretion, has settled the full amount of such Preferential Dividends in cash or shares of Common Stock pursuant to this Section 3.2.

3.3 In the event that the Business Combination Agreement (as defined in the Purchase Agreement) is terminated for any reason, the Preferential Dividend Rate shall increase 600 basis points in the event that the Exchange Cap remains in place on the dates representing the sixth (6^th) month and twelfth (12^th) month anniversary of such termination date; provided, however, that in no event shall the Preferential Dividend Rate (i) exceed eighteen percent (18%) and (ii) the Preferential Dividend Rate shall be reset to 6.0% upon Stockholder Approval.

3.4 Except for stock dividends or distributions for which adjustments are to be made pursuant to Section 7, Holders shall be entitled to receive, and the Corporation shall pay, dividends on shares of Preferred Stock equal (on an as-if-converted-to-Common-Stock basis, disregarding for such purpose any conversion limitations hereunder) to and in the same form as dividends actually paid on shares of the Common Stock when, as and if such dividends are paid on shares of the Common Stock. The Corporation shall not pay any dividends on the Common Stock unless the Corporation simultaneously complies with this provision.

Section 4. Voting Rights.

4.1 Except as otherwise provided herein or as otherwise required by the Delaware General Corporation Law, the Preferred Stock shall have no voting rights. However, as long as any shares of Preferred Stock are outstanding, the Corporation shall not, without the affirmative vote or written approval, agreement or waiver of the Holders of a majority of the then outstanding shares of the Preferred Stock, voting as a separate class, (a) alter or change the powers, preferences or rights given to the Preferred Stock in this Certificate of Designation, (b) increase the number of authorized shares of Preferred Stock, (c) authorize or issue an additional class or series of capital stock that ranks pari passu with or senior to the Preferred Stock with respect to the payment of dividends, rights of redemption or the distribution of assets on liquidation, (d) redeem, purchase or otherwise acquire or pay or declare any dividend or other distribution on (or pay into or set aside for a sinking fund for any such purpose) any capital stock of the Corporation; provided, that this restriction shall not apply to (i) the redemption or repurchase of or the payment of dividends on shares of Preferred Stock pursuant hereto or (ii) the declaration or payment of any dividend or distribution payable on the Common Stock in shares of Common Stock, or (e) enter into any agreement with respect to any of the foregoing.

4.2 Any vote or written approval, agreement or waiver required or permitted under Section 4.1 may be taken at a meeting of the Holders or through a written consent executed by the requisite number of Holders.

Section 5. Liquidation. Upon any liquidation, dissolution or winding-up of the Corporation, whether voluntary or involuntary (a “Liquidation”), the Holders shall be entitled to receive out of the assets available for distribution to stockholders, for all shares of Preferred Stock held by them, (i) after and subject to the payment in full of all amounts required to be distributed to the holders of another class or series of stock of the Corporation ranking on liquidation prior and in preference to the Preferred Stock, (ii) ratably with any class or series of stock designated as ranking on liquidation on parity with the Preferred Stock and (iii) in preference and priority to the holders of the shares of Junior Securities, an amount equal to 100% of the Stated Value, plus all unpaid accrued and accumulated Preferential Dividends on all such shares (whether or not declared), and no more, in proportion to the full and preferential amount that all shares of the Preferred Stock are entitled to receive. The Corporation shall mail written notice of any such Liquidation not less than 20 days prior to the payment date stated therein, to each Holder. If the assets of the Corporation shall be insufficient to pay in full such amounts, then the entire assets to be distributed to the holders of Series 5 Preferred Stock shall be ratably distributed among the Holders in accordance with the respective amounts that would be payable on such shares if all amounts payable thereon were paid in full.

Section 6. Conversion.

a) Conversions at Option of Holder. Each share of Preferred Stock shall be convertible, at any time and from time to time from and after the Original Issue Date, at the option of the Holder thereof, into that number of shares of Common Stock (subject to the limitations set forth in Section 6(e)) determined by dividing the Stated Value of such share of Preferred Stock plus all unpaid accrued and accumulated Preferential Dividends on such share (whether or not declared) by the Conversion Price (as defined below). Notwithstanding the foregoing, the Preferred Stock shall only be convertible into up to an aggregate of 666,212 shares of Common Stock until the time Stockholder Approval is obtained and such aggregate amount shall include any shares of Common Stock issuable upon the exercise of the Warrants issued pursuant to the Purchase Agreement (the “Issuable Maximum”), subject to adjustment for reverse and forward stock splits, stock dividends, stock combinations and other similar transactions of the Common Stock that occur after the date of the Purchase Agreement. For the avoidance of doubt, if the Company has not obtained the Stockholder Approval, then the Company may not issue upon conversion of the Preferred Stock a number of shares of Common Stock, which, when aggregated with any shares of Common Stock issued (i) pursuant to the exercise of the Warrants issued pursuant to the Purchase Agreement and (ii) upon prior conversion of Preferred Stock, would exceed 666,212 subject to adjustment for reverse and forward stock splits, stock dividends, stock combinations and other similar transactions of the Common Stock that occur after the date of the Purchase Agreement. Each Holder shall be entitled to a portion of the Issuable Maximum equal to the quotient obtained by dividing (x) the Stated Value of such Holder’s Preferred Stock by (y) the aggregate Stated Value of the outstanding shares of Preferred Stock on the Original Issue Date. Holders shall effect conversions by providing the Corporation with the form of conversion notice attached hereto as Annex A (a “Notice of Conversion”). Each Notice of Conversion shall specify the number of shares of Preferred Stock to be converted, the number of shares of Preferred Stock owned prior to the conversion at issue, the number of shares of Preferred Stock owned subsequent to the conversion at issue and the date on which such conversion is to be effected, which date may not be prior to the date the applicable Holder delivers by email such Notice of Conversion to the Corporation (such date, the “Conversion Date”). If no Conversion Date is specified in a Notice of Conversion, the Conversion Date shall be the date that such Notice of Conversion to the Corporation is deemed delivered hereunder. No ink-original Notice of Conversion shall be required, nor shall any medallion guarantee (or other type of guarantee or notarization) of any Notice of Conversion form be required. The calculations and entries set forth in the Notice of Conversion shall control in the absence of manifest or mathematical error. From and after the Conversion Date, until presented for transfer or exchange, certificates that previously represented shares of Preferred Stock, if any, shall represent, in lieu of the number of shares of Preferred Stock previously represented by such certificate, the number of shares of Preferred Stock, if any, previously represented by such certificate that were not converted pursuant to the Notice of Conversion, plus the number of shares of Conversion Shares into which the shares of Preferred Stock previously represented by such certificate were converted. To effect conversions of shares of Preferred Stock, a Holder shall not be required to surrender the certificate(s), if any, representing the shares of Preferred Stock to the Corporation unless all of the shares of Preferred Stock represented thereby are so converted, in which case such Holder shall deliver the certificate, if any, representing such shares of Preferred Stock promptly following the Conversion Date at issue. Shares of Preferred Stock converted into Common Stock in accordance with the terms hereof shall be canceled and shall not be reissued as shares of Preferred Stock and shall automatically and without further action by the Corporation be retired and restored to the status of authorized but unissued shares of preferred stock of the Corporation.

b) Automatic Conversion. Immediately prior to the closing of the transactions contemplated by the Business Combination Agreement (as defined in the Purchase Agreement), each outstanding share of the Preferred Stock shall, without any further action by the Corporation or the Holders, automatically convert into the number of shares of Common Stock determined by dividing the Stated Value of such share of Preferred Stock plus all unpaid accrued and accumulated Preferential Dividends on such share (whether or not declared) by the Conversion Price. Any limitations provided in Section 6(e) shall have no effect on any conversion contemplated by this Section 6(b).

c) Conversion Price. The conversion price for the Preferred Stock shall equal $1.25, subject to adjustment herein (the “Conversion Price”).

d) Mechanics of Conversion

i. Delivery of Conversion Shares Upon Conversion. Not later than the earlier of (i) two (2) Trading Days and (ii) the number of Trading Days comprising the Standard Settlement Period (as defined below) after each Conversion Date (the “Share Delivery Date”), the Corporation shall deliver, or cause to be delivered, to the converting Holder the number of Conversion Shares being acquired upon the conversion of the Preferred Stock. As used herein, “Standard Settlement Period” means the standard settlement period, expressed in a number of Trading Days, on the Corporation’s primary Trading Market with respect to the Common Stock as in effect on the date of delivery of the Notice of Conversion.

ii. Failure to Deliver Conversion Shares; Buy-In. If, in the case of any Notice of Conversion, such Conversion Shares are not delivered to or as directed by the applicable Holder by the Share Delivery Date, the Holder shall, to the fullest extent permitted by law, be entitled to elect by written notice to the Corporation at any time on or before its receipt of such Conversion Shares, to rescind such Conversion, in which event the Corporation shall promptly return to the Holder any original Preferred Stock certificate delivered to the Corporation and the Holder shall promptly return to the Corporation the Conversion Shares issued to such Holder pursuant to the rescinded Notice of Conversion. If, by the Share Delivery Date, the Corporation fails for any reason to deliver the shares of Common Stock issuable upon conversion of the Preferred Stock, as set forth in the Conversion Notice, and after such Share Delivery Date, the converting Holder purchases, in an arm’s length open market transaction or otherwise, shares of Common Stock (the “Covering Shares”) in order to make delivery in satisfaction of a sale of Common Stock by the converting Holder (the “Sold Shares”), which delivery such converting Holder anticipated to make using the shares to be issued upon such conversion (a “Buy-In”), the converting Holder shall have the right to require the Corporation to pay to the converting Holder the Buy-In Adjustment Amount. The Corporation shall pay the Buy-In Adjustment Amount to the converting Holder in immediately available funds immediately upon demand by the converting holder. The term “Buy-In Adjustment Amount” means the amount equal to the excess, if any, of (i) the converting Holder’s total purchase price (including brokerage commissions, if any) for the Covering Shares associated with a Buy-In, over (ii) the net proceeds (after brokerage commissions, if any) received by the converting holder from the sale of the Sold Shares. By way of illustration and not in limitation of the foregoing, if the converting Holder purchases shares of Common Stock having a total purchase price (including brokerage commissions) of $11,000 to cover a Buy-In, with respect to shares of Common Stock it sold for net proceeds of $10,000, the Buy-In Adjustment Amount which the Corporation will be required to pay to the converting Holder will be $1,000. The converting Holder shall provide the Corporation written notice indicating the amounts payable to such Holder in respect of the Buy-In and, upon request of the Corporation, evidence of the amount of such loss. 

iii. Obligation Absolute. The Corporation’s obligation to issue and deliver the Conversion Shares upon conversion of Preferred Stock in accordance with the terms hereof are absolute and unconditional, irrespective of any action or inaction by a Holder to enforce the same, any waiver or consent with respect to any provision hereof, the recovery of any judgment against any Person or any action to enforce the same, or any setoff, counterclaim, recoupment, limitation or termination, or any breach or alleged breach by such Holder or any other Person of any obligation to the Corporation or any violation or alleged violation of law by such Holder or any other person, and irrespective of any other circumstance which might otherwise limit such obligation of the Corporation to such Holder in connection with the issuance of such Conversion Shares; provided, however, that such delivery shall not operate as a waiver by the Corporation of any such action that the Corporation may have against such Holder.

iv. Reservation of Shares Issuable Upon Conversion. The Corporation covenants that it will at all times reserve and keep available out of its authorized and unissued shares of Common Stock for the sole purpose of issuance upon conversion of the Preferred Stock as herein provided, free from preemptive rights or any other actual contingent purchase rights of Persons other than the Holder (and the other Holders), not less than such aggregate number of shares of the Common Stock as shall (subject to the terms and conditions set forth in the Purchase Agreement) be issuable (taking into account the adjustments and restrictions of Section 7) upon the conversion of the then outstanding shares of Preferred Stock. The Corporation covenants that all shares of Common Stock that shall be so issuable shall, upon issue, be duly authorized, validly issued, fully paid and nonassessable.

vi. Fractional Shares. No fractional shares or scrip representing fractional shares shall be issued upon the conversion of the Preferred Stock. As to any fraction of a share of Common Stock which the Holder would otherwise be entitled to upon such conversion, the Corporation shall at its election, either pay a cash adjustment in respect of such final fraction in an amount equal to such fraction multiplied by the Conversion Price or round up to the next whole share. Notwithstanding anything to the contrary contained herein, but consistent with the provisions of this subsection with respect to fractional Conversion Shares, nothing shall prevent any Holder from converting fractional shares of Preferred Stock.

vii. Transfer Taxes and Expenses. The issuance of Conversion Shares on conversion of the Preferred Stock shall be made without charge to any Holder for any documentary stamp or similar taxes that may be payable in respect of the issue or delivery of such Conversion Shares, provided that the Corporation shall not be required to pay any tax that may be payable in respect of any transfer involved in the issuance and delivery of any such Conversion Shares upon conversion in a name other than that of the Holder of such shares of Preferred Stock and the Corporation shall not be required to issue or deliver such Conversion Shares unless or until the Person or Persons requesting the issuance thereof shall have paid to the Corporation the amount of such tax or shall have established to the satisfaction of the Corporation that such tax has been paid.

e) Beneficial Ownership Limitation. Notwithstanding anything to the contrary set forth herein, the Corporation shall not effect any conversion of the Preferred Stock, and a Holder shall not have the right to convert any portion of the Preferred Stock, to the extent that, after giving effect to the conversion set forth on the applicable Notice of Conversion, such Holder (together with such Holder’s Affiliates, and any Persons acting as a group together with such Holder or any of such Holder’s Affiliates (such Persons, “Attribution Parties”)) would beneficially own in excess of the Beneficial Ownership Limitation (as defined below). For purposes of the foregoing sentence, the number of shares of Common Stock beneficially owned by such Holder and its Affiliates and Attribution Parties shall include the number of shares of Common Stock issuable upon conversion of the Preferred Stock with respect to which such determination is being made, but shall exclude the number of shares of Common Stock which are issuable upon (i) conversion of the remaining, unconverted Preferred Stock beneficially owned by such Holder or any of its Affiliates or Attribution Parties and (ii) exercise or conversion of the unexercised or unconverted portion of any other securities of the Corporation subject to a limitation on conversion or exercise analogous to the limitation contained herein (including, without limitation, the Preferred Stock) beneficially owned by such Holder or any of its Affiliates or Attribution Parties. Except as set forth in the preceding sentence, for purposes of this Section 6(d), beneficial ownership shall be calculated in accordance with Section 13(d) of the Exchange Act and the rules and regulations promulgated thereunder. To the extent that the limitation contained in this Section 6(d) applies, the determination of whether the Preferred Stock is convertible (in relation to other securities owned by such Holder together with any Affiliates and Attribution Parties) and of how many shares of Preferred Stock are convertible shall be in the sole discretion of such Holder, and the submission of a Notice of Conversion shall be deemed to be such Holder’s determination of whether the shares of Preferred Stock may be converted (in relation to other securities owned by such Holder together with any Affiliates and Attribution Parties) and how many shares of the Preferred Stock are convertible, in each case subject to the Beneficial Ownership Limitation. To ensure compliance with this restriction, each Holder will be deemed to represent to the Corporation each time it delivers a Notice of Conversion that such Notice of Conversion has not violated the restrictions set forth in this paragraph and the Corporation shall have no obligation to verify or confirm the accuracy of such determination. In addition, a determination as to any group status as contemplated above shall be determined in accordance with Section 13(d) of the Exchange Act and the rules and regulations promulgated thereunder. The Holder understands and acknowledges that the Corporation is not representing to the Holder that the calculations and determinations set forth in this Section 6(d) are in compliance with Section 13(d) of the Exchange Act and the Holder is solely responsible for any schedules required to be filed in accordance therewith. For purposes of this Section 6(d), in determining the number of outstanding shares of Common Stock, a Holder may rely on the number of outstanding shares of Common Stock as stated in the most recent of the following: (i) the Corporation’s most recent periodic or annual report filed with the Commission, as the case may be, (ii) a more recent public announcement by the Corporation or (iii) a more recent written notice by the Corporation or the Transfer Agent setting forth the number of shares of Common Stock outstanding. Upon the written or oral request (which may be via email) of a Holder, the Corporation shall within one Trading Day confirm orally and in writing to such Holder the number of shares of Common Stock then outstanding. In any case, the number of outstanding shares of Common Stock shall be determined after giving effect to the conversion or exercise of securities of the Corporation, including the Preferred Stock, by such Holder or its Affiliates or Attribution Parties since the date as of which such number of outstanding shares of Common Stock was reported. The “Beneficial Ownership Limitation” shall be 4.99% (or, upon election by a Holder prior to the issuance of any shares of Preferred Stock, 9.99%) of the number of shares of the Common Stock outstanding immediately after giving effect to the issuance of shares of Common Stock issuable upon conversion of Preferred Stock held by the applicable Holder. A Holder, upon notice to the Corporation submitted in writing (which may be via email) to the Secretary of the Corporation, may increase or decrease the Beneficial Ownership Limitation provisions of this Section 6(d) applicable to its Preferred Stock provided that the Beneficial Ownership Limitation in no event exceeds 19.99% of the number of shares of the Common Stock outstanding immediately after giving effect to the issuance of shares of Common Stock upon conversion of the Preferred Stock held by the Holder (the “Exchange Cap”) and the provisions of this Section 6(d) shall continue to apply. Any such increase in the Beneficial Ownership Limitation will not be effective until the 61^st day after such notice is delivered to the Corporation and shall only apply to such Holder and no other Holder. The Beneficial Ownership Limitation shall not be waived by the Corporation or the Holder. The provisions of this paragraph shall be construed and implemented in a manner otherwise than in strict conformity with the terms of this Section 6(d) to correct this paragraph (or any portion hereof) which may be defective or inconsistent with the intended Beneficial Ownership Limitation contained herein or to make changes or supplements necessary or desirable to properly give effect to such limitation. The limitations contained in this paragraph shall apply to a successor holder of Preferred Stock.

Section 7. Certain Adjustments.

a) Stock Dividends and Stock Splits. If the Corporation, at any time while the Preferred Stock is outstanding: (i) pays a stock dividend or otherwise makes a distribution or distributions payable in shares of Common Stock on shares of Common Stock or any other Common Stock Equivalents (which, for avoidance of doubt, shall not include any shares of Common Stock issued by the Corporation upon conversion of, or payment of a dividend on, the Preferred Stock), (ii) subdivides outstanding shares of Common Stock into a larger number of shares, (iii) combines (including by way of a reverse stock split) outstanding shares of Common Stock into a smaller number of shares, or (iv) issues, in the event of a reclassification of shares of the Common Stock, any shares of capital stock of the Corporation, then the Conversion Price shall be multiplied by a fraction of which the numerator shall be the number of shares of Common Stock (excluding any treasury shares of the Corporation) outstanding immediately before such event, and of which the denominator shall be the number of shares of Common Stock outstanding immediately after such event. Any adjustment made pursuant to this Section 7(a) shall become effective immediately after the record date for the determination of stockholders entitled to receive such dividend or distribution and shall become effective immediately after the effective date in the case of a subdivision, combination or re-classification.

b) Subsequent Rights Offerings. In addition to any adjustments pursuant to Section 7(a) above, if at any time the Corporation grants, issues or sells any Common Stock Equivalents or rights to purchase stock, warrants, securities or other property pro rata to the record holders of any class of shares of Common Stock (the “Purchase Rights”), then each Holder will be entitled to acquire, upon the terms applicable to such Purchase Rights, the aggregate Purchase Rights which the Holder could have acquired if the Holder had held the number of shares of Common Stock acquirable upon complete conversion of such Holder’s Preferred Stock (without regard to any limitations on conversion hereof, including without limitation, the Beneficial Ownership Limitation) immediately before the date on which a record is taken for the grant, issuance or sale of such Purchase Rights, or, if no such record is taken, the date as of which the record holders of shares of Common Stock are to be determined for the grant, issue or sale of such Purchase Rights (provided, however, to the extent that the Holder’s right to participate in any such Purchase Right would result in the Holder exceeding the Beneficial Ownership Limitation, then the Holder shall not be entitled to participate in such Purchase Right to such extent (or beneficial ownership of such shares of Common Stock as a result of such Purchase Right to such extent) and such Purchase Right to such extent shall be held in abeyance for the Holder until such time, if ever, as its right thereto would not result in the Holder exceeding the Beneficial Ownership Limitation).

c) Pro Rata Distributions. During such time as the Preferred Stock is outstanding, if the Corporation declares or makes any dividend or other distribution of its assets (or rights to acquire its assets) to holders of shares of Common Stock, by way of return of capital or otherwise (including, without limitation, any distribution of cash, stock or other securities, property or options by way of a dividend, spin off, reclassification, corporate rearrangement, scheme of arrangement or other similar transaction (other than any dividend or distribution as to which an adjustment was effected pursuant to Section 7(a)) (a “Distribution”), then, in each such case, each Holder shall be entitled to participate in such Distribution to the same extent that the Holder would have participated therein if the Holder had held the number of shares of Common Stock acquirable upon complete conversion of the Preferred Stock (without regard to any limitations on conversion hereof, including without limitation, the Beneficial Ownership Limitation) immediately before the date of which a record is taken for such Distribution, or, if no such record is taken, the date as of which the record holders of shares of Common Stock are to be determined for the participation in such Distribution (provided, however, to the extent that the Holder’s right to participate in any such Distribution would result in the Holder exceeding the Beneficial Ownership Limitation, then the Holder shall not be entitled to participate in such Distribution to such extent (or in the beneficial ownership of any shares of Common Stock as a result of such Distribution to such extent) and the portion of such Distribution shall be held in abeyance for the benefit of the Holder until such time, if ever, as its right thereto would not result in the Holder exceeding the Beneficial Ownership Limitation).

d) Fundamental Transaction. If, at any time while the Preferred Stock is outstanding, (i) the Corporation, directly or indirectly, in one or more related transactions effects any merger or consolidation of the Corporation with or into another Person, (ii) the Corporation (and all of its Subsidiaries, taken as a whole), directly or indirectly, effects any sale, lease, license, assignment, transfer, conveyance or other disposition of all or substantially all of its assets in one or a series of related transactions, (iii) any, direct or indirect, purchase offer, tender offer or exchange offer (whether by the Corporation or another Person) is completed pursuant to which holders of Common Stock are permitted to sell, tender or exchange their shares for other securities, cash or property and has been accepted by the holders of 50% or more of the outstanding Common Stock, (iv) the Corporation, directly or indirectly, in one or more related transactions effects any reclassification, reorganization or recapitalization of the Common Stock or any compulsory share exchange pursuant to which the Common Stock is effectively converted into or exchanged for other securities, cash or property, or (v) the Corporation, directly or indirectly, in one or more related transactions consummates a stock or share purchase agreement or other business combination (including, without limitation, a reorganization, recapitalization, spin-off or scheme of arrangement) with another Person whereby such other Person acquires more than 50% of the outstanding shares of Common Stock (not including any shares of Common Stock held by the other Person or other Persons making or party to, or associated or affiliated with the other Persons making or party to, such stock or share purchase agreement or other business combination) (each a “Fundamental Transaction”), then, upon any subsequent conversion of the Preferred Stock, the Holder shall have the right to receive, for each Conversion Share that would have been issuable upon such conversion immediately prior to the occurrence of such Fundamental Transaction (without regard to any limitation in Section 6(d) on the conversion of the Preferred Stock), the number of shares of Common Stock of the successor or acquiring corporation or of the Corporation, if it is the surviving corporation, and any additional or other consideration (the “Alternate Consideration”) receivable as a result of such Fundamental Transaction by a holder of the number of shares of Common Stock for which the Preferred Stock is convertible immediately prior to such Fundamental Transaction (without regard to any limitation in Section 6(d) on the conversion of the Preferred Stock). For purposes of any such conversion, the determination of the Conversion Price shall be appropriately adjusted to apply to such Alternate Consideration based on the amount of Alternate Consideration issuable in respect of one share of Common Stock in such Fundamental Transaction, and the Corporation shall apportion the Conversion Price among the Alternate Consideration in a reasonable manner reflecting the relative value of any different components of the Alternate Consideration. If holders of Common Stock are given any choice as to the securities, cash or property to be received in a Fundamental Transaction, then the Holder shall be given the same choice as to the Alternate Consideration it receives upon any conversion of the Preferred Stock following such Fundamental Transaction. Notwithstanding anything herein to the contrary, the foregoing provisions of this Section 7(d) shall not apply to the transactions contemplated by the Business Combination Agreement (as defined in the Purchase Agreement).

e) Calculations. All calculations under this Section 7 shall be made to the nearest cent or the nearest 1/100th of a share, as the case may be. For purposes of this Section 7, the number of shares of Common Stock deemed to be issued and outstanding as of a given date shall be the sum of the number of shares of Common Stock (excluding any treasury shares of the Corporation) issued and outstanding.

f) Notice to the Holders.

i. Adjustment to Conversion Price. Whenever the Conversion Price is adjusted pursuant to any provision of this Section 7, the Corporation shall promptly deliver to each Holder by email a notice setting forth the Conversion Price after such adjustment and setting forth a brief statement of the facts requiring such adjustment, provided that the failure to deliver such notice or any defect therein or in the delivery thereof shall not affect the validity of the adjustment required to be specified in such notice.

ii. Notice to Allow Conversion by Holder. If (A) the Corporation shall declare a dividend (or any other distribution in whatever form) on the Common Stock, (B) the Corporation shall declare a special nonrecurring cash dividend on the Common Stock or shall repurchase the Common Stock, (C) the Corporation shall authorize the granting to all holders of the Common Stock in their capacities as such rights or warrants to subscribe for or purchase any shares of capital stock of any class or of any rights, (D) the approval of any stockholders of the Corporation shall be required in connection with any reclassification of the Common Stock, any consolidation or merger to which the Corporation is a party, any sale or transfer of all or substantially all of the assets of the Corporation (and all of its Subsidiaries, taken as a whole), or any compulsory share exchange whereby the Common Stock is converted into other securities, cash or property or (E) the Corporation shall authorize the voluntary or involuntary dissolution, liquidation or winding up of the affairs of the Corporation, then, in each case, the Corporation shall email to each Holder at its last email address as it shall appear upon the stock ledger of the Corporation, at least ten (10) calendar days prior to the applicable record or effective date hereinafter specified, a notice stating (x) the date on which a record is to be taken for the purpose of such dividend, distribution, redemption, rights or warrants, or if a record is not to be taken, the date as of which the holders of the Common Stock of record to be entitled to such dividend, distributions, redemption, rights or warrants are to be determined or (y) the date on which such reclassification, consolidation, merger, sale, transfer or share exchange is expected to become effective or close, and the date as of which it is expected that holders of the Common Stock shall be entitled to exchange their shares of the Common Stock for securities, cash or other property deliverable upon such reclassification, consolidation, merger, sale, transfer or share exchange, provided that the failure to deliver such notice or any defect therein or in the delivery thereof shall not affect the validity of the corporate action required to be specified in such notice. The Holder shall remain entitled to convert its Preferred Stock (or any part hereof) during the 10-day period commencing on the date of such notice through the effective date of the event triggering such notice except as may otherwise be expressly set forth herein.

Section 8. Miscellaneous.

a) Notices. Any and all notices or other communications or deliveries to be provided by the Holders hereunder including, without limitation, any Notice of Conversion, shall be in writing and delivered personally, by e-mail, or sent by a nationally recognized overnight courier service, addressed to the Corporation, 100 Overlook Center, Suite 102, Princeton, New Jersey 08540, Attention: Chief Executive Officer, or such other e-mail address or address as the Corporation may specify for such purposes by notice to the Holders delivered in accordance with this Section 8. Any and all notices or other communications or deliveries to be provided by the Corporation hereunder shall be in writing and delivered personally, by e-mail, or sent by a nationally recognized overnight courier service addressed to each Holder at the e-mail address or address of such Holder appearing on the books of the Corporation, or if no such e-mail address or address appears on the books of the Corporation, at the principal place of business of such Holder, as set forth in the Purchase Agreement. Any notice or other communication or deliveries hereunder shall be deemed given and effective on the earliest of (i) the time of transmission, if such notice or communication is delivered via e-mail at the e-mail address set forth in this Section 8 prior to 5:30 p.m. (New York City time) on any date, (ii) the next Trading Day after the time of transmission, if such notice or communication is delivered via e-mail to raghurao@sonnetbio.com and dongriffith@sonnetbio.com on a day that is not a Trading Day or later than 5:30 p.m. (New York City time) on any Trading Day, (iii) the second Trading Day following the date of mailing, if sent by U.S. nationally recognized overnight courier service, or (iv) upon actual receipt by the party to whom such notice is required to be given.

b) Lost or Mutilated Preferred Stock Certificate. If a Holder’s Preferred Stock certificate shall be mutilated, lost, stolen or destroyed, the Corporation shall execute and deliver, in exchange and substitution for and upon cancellation of a mutilated certificate, or in lieu of or in substitution for a lost, stolen or destroyed certificate, uncertificated shares or a new certificate for the shares of Preferred Stock represented by the certificate so mutilated, lost, stolen or destroyed, but only upon receipt of evidence of such loss, theft or destruction of such certificate, and of the ownership thereof reasonably satisfactory to the Corporation (which shall not include the requirement of posting of any bond).

c) Governing Law. All questions concerning the construction, validity, enforcement and interpretation of this Certificate of Designation shall be governed by and construed and enforced in accordance with the internal laws of the State of Delaware, without regard to the principles of conflict of laws thereof.

d) Waiver. Any waiver by the Corporation or a Holder of any provision of this Certificate of Designation or any breach thereof shall not operate as or be construed to be a waiver of any other provision of this Certificate of Designation or any breach thereof or a waiver by any other Holders. The failure of the Corporation or a Holder to insist upon strict adherence to any term of this Certificate of Designation on one or more occasions shall not be considered a waiver or deprive that party (or any other Holder) of the right thereafter to insist upon strict adherence to that term or any other term of this Certificate of Designation on any other occasion. Any waiver by the Corporation or a Holder must be in writing.

e) Severability. If any provision of this Certificate of Designation is invalid, illegal or unenforceable, the balance of this Certificate of Designation shall remain in effect, and if any provision is inapplicable to any Person or circumstance, it shall nevertheless remain applicable to all other Persons and circumstances. If it shall be found that any interest or other amount deemed interest due hereunder violates the applicable law governing usury, the applicable rate of interest due hereunder shall automatically be lowered to equal the maximum rate of interest permitted under applicable law.

f) Next Business Day. Whenever any payment or other obligation hereunder shall be due on a day other than a Business Day, such payment shall be made on the next succeeding Business Day.

g) Headings. The headings contained herein are for convenience only, do not constitute a part of this Certificate of Designation and shall not be deemed to limit or affect any of the provisions hereof.

h) Status of Converted or Preferred Stock. Shares of Preferred Stock may only be issued pursuant to the Purchase Agreement. If any shares of Preferred Stock shall be converted or reacquired by the Corporation, such shares may not be reissued as Preferred Stock and shall automatically be retired and shall resume the status of authorized but unissued shares of preferred stock and shall no longer be designated as Preferred Stock.

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RESOLVED, FURTHER, that the Chairman, the Chief Executive Officer or any interim chief executive officer, the Chief Financial Officer, the president or any vice-president, and the secretary or any assistant secretary, of the Corporation be and they hereby are authorized and directed to prepare and file this Certificate of Designation of Preferences, Rights and Limitations in accordance with the foregoing resolution and the provisions of Delaware law.

IN WITNESS WHEREOF, the undersigned has executed this Certificate this 11^th day of July, 2025.

ANNEX A

NOTICE OF CONVERSION

(To be Executed by the Registered Holder in order to Convert Shares of Preferred Stock)

The undersigned hereby elects to convert the number of shares of Series 5 Convertible Preferred Stock indicated below into shares of common stock, par value $0.0001 per share (the “Common Stock”), of Sonnet BioTherapeutics Holdings, Inc., a Delaware corporation (the “Corporation”), according to the conditions hereof, as of the date written below. If shares of Common Stock are to be issued in the name of a Person other than the undersigned, the undersigned will pay all transfer taxes payable with respect thereto and is delivering herewith such certificates and opinions as may be required by the Corporation in accordance with the Purchase Agreement. No fee will be charged to the Holders for any conversion, except for any such transfer taxes.

Conversion calculations:

Date to Effect Conversion: _________________________

Number of shares of Preferred Stock owned prior to Conversion: _________________________

Number of shares of Preferred Stock to be Converted: _________________________

Stated Value of shares of Preferred Stock to be Converted: _________________________

Number of shares of Common Stock to be Issued: _________________________

Applicable Conversion Price: _________________________

Number of shares of Preferred Stock subsequent to Conversion: _________________________

Address for Delivery: _________________________

or

DWAC Instructions:

Broker no: ________________

Account no: _______________