Description of Organization and Business Operations and Liquidity | Note 1 — Description of Organization and Business Operations and Liquidity Phoenix Biotech Acquisition Corp. (the “Company”) was incorporated in Delaware on June 8, 2021. The Company was formed for the purpose of effecting a merger, capital stock exchange, asset acquisition, stock purchase, reorganization, or similar business combination with one or more businesses (a “business combination”). The Company is not limited to a particular industry or geographic region for purposes of consummating a business combination. The Company is an early stage and emerging growth company and, as such, the Company is subject to all of the risks associated with early stage and emerging growth companies. As of December 31, 2023, the Company had not commenced any operations. All activity through December 31, 2023 relates to the Company’s formation and initial public offering (“IPO”), which is described below and, since the offering, the search for a prospective initial business combination. The Company will not generate any operating revenues until after the completion of its initial business combination, at the earliest. The Company generates non-operating income in the form of interest income earned on investments from the proceeds derived from the IPO and placed in the Trust Account (defined below). The registration statement for the Company’s IPO was declared effective on October 5, 2021. On October 8, 2021, the Company consummated the IPO of 15,500,000 units (“Units”) (with respect to the Class A common stock included in the Units being offered (the “Public Shares”)) at $10.00 per Unit generating gross proceeds of $155,000,000, which is discussed in Note 3. The Company has selected December 31 as its fiscal year end. Simultaneously with the closing of the IPO, the Company consummated the sale of 845,000 units (“Private Placement Units”) (with respect to the Class A common stock included in the Private Placement Units offered, the “Private Placement Shares”) at a price of $10.00 per Private Placement Unit in a private placement to the Company’s sponsor, Phoenix Biotech Sponsor, LLC (the “Sponsor”), Cantor Fitzgerald & Co. (“Cantor”) and Cohen & Company Capital Markets, a division of J.V.B. Financial Group, LLC (“CCM”), generating gross proceeds of $8,450,000, which is described in Note 4. Simultaneously with the closing of the IPO, the Company consummated the sale of 2,000,000 additional Units upon receiving notice of the underwriter’s election to partially exercise its overallotment option (“Overallotment Units”), generating additional gross proceeds of $20,000,000 and incurring additional offering costs of $1,400,000 in underwriting fees, all of which are deferred until the completion of the Company’s initial business combination. Simultaneously with the exercise of the overallotment, the Company consummated the Private Placement of an additional 40,000 Private Placement Units to the Sponsor and CCM, generating gross proceeds of $400,000. Offering costs for the IPO and exercise of the overallotment option amounted to $12,729,318, consisting of $2,635,000 of underwriting fees, $9,150,000 of deferred underwriting fees payable (which are held in the Trust Account (defined below)) and $944,318 of other costs. As described in Note 6, the $9,150,000 of deferred underwriting fees payable is contingent upon the consummation of a business combination by January 8, 2024, subject to the terms of the underwriting agreement. Following the closing of the IPO, $178,500,000 ($10.20 per Unit) from the net proceeds of the sale of the Units in the IPO, the Overallotment Units and the Private Placement Units was placed in a trust account (“Trust Account”) and invested in U.S. government securities, within the meaning set forth in Section 2(a)(16) of the Investment Company Act of 1940, as amended (the “Investment Company Act”), with a maturity of 185 days or less or in money market funds meeting the conditions of the Investment Company Act, as determined by the Company, until the earlier of: (i) the completion of a business combination and (ii) the distribution of the Trust Account, as described below. The Company’s management has broad discretion with respect to the specific application of the net proceeds of the IPO and the sale of the Private Placement Units, although substantially all of the net proceeds are intended to be applied generally toward consummating a business combination. There is no assurance that the Company will be able to complete a business combination successfully. The Company must complete one or more initial business combinations having an aggregate fair market value of at least 80% of the assets held in the Trust Account (excluding the deferred underwriting commissions and taxes payable on income earned on the Trust Account) at the time of the agreement to enter into the initial business combination. However, the Company will only complete a business combination if the post-transaction company owns or acquires 50% or more of the outstanding voting securities of the target or otherwise acquires a controlling interest in the target sufficient for it not to be required to register as an investment company under the Investment Company Act. There is no assurance the Company will be able to successfully effect a business combination. The Company will provide the holders of the outstanding Public Shares (the “Public Stockholders”) with the opportunity to redeem all or a portion of their Public Shares upon the completion of a business combination either (i) in connection with a stockholder meeting called to approve the business combination or (ii) by means of a tender offer. The decision as to whether the Company will seek stockholder approval of a business combination or conduct a tender offer will be made by the Company. The Public Stockholders will be entitled to redeem their Public Shares for a pro rata portion of the amount then in the Trust Account (initially $10.20 per Public Share, plus any pro rata interest then in the Trust Account, net of taxes payable). There will be no redemption rights with respect to the Company’s warrants. All of the Public Shares contain a redemption feature which allows for the redemption of such Public Shares in connection with the Company’s liquidation, if there is a stockholder vote or tender offer in connection with the Company’s business combination and in connection with certain amendments to the Company’s amended and restated certificate of incorporation (the “Charter”). In accordance with the rules of the U.S. Securities and Exchange Commission (the “SEC”) and its guidance on redeemable equity instruments, which has been codified in Accounting Standards Codification (“ASC”) 480-10-S99, redemption provisions not solely within the control of a company require common stock subject to redemption to be classified outside of permanent equity. Given that the Public Shares were issued with other freestanding instruments (i.e., public warrants), the initial carrying value of Class A common stock classified as temporary equity will be the allocated proceeds determined in accordance with ASC 470-20. The Class A common stock is subject to ASC 480-10-S99. If it is probable that the equity instrument will become redeemable, the Company has the option to either (i) accrete changes in the redemption value over the period from the date of issuance (or from the date that it becomes probable that the instrument will become redeemable, if later) to the earliest redemption date of the instrument or (ii) recognize changes in the redemption value immediately as they occur and adjust the carrying amount of the instrument to equal the redemption value at the end of each reporting period. The Company has elected to recognize the changes immediately. The accretion or remeasurement will be treated as a deemed dividend (i.e., a reduction to retained earnings, or in the absence of retained earnings, additional paid-in capital). While redemptions cannot cause the Company’s net tangible assets to fall below $5,000,001, the Public Shares are redeemable and are classified as such on the balance sheet until such date that a redemption event takes place. Redemptions of the Company’s Public Shares may be subject to the satisfaction of conditions, including minimum cash conditions, pursuant to an agreement relating to a business combination. If the Company seeks stockholder approval of the business combination, the Company will proceed with a business combination if a majority of the shares voted are voted in favor of the business combination, or such other vote as required by law or stock exchange rule. If a stockholder vote is not required by applicable law or stock exchange listing requirements and the Company does not decide to hold a stockholder vote for business or other reasons, the Company will, pursuant to its Charter, conduct the redemptions pursuant to the tender offer rules of the SEC and file tender offer documents with the SEC prior to completing a business combination. If, however, stockholder approval of the transaction is required by applicable law or stock exchange listing requirements, or the Company decides to obtain stockholder approval for business or other reasons, the Company will offer to redeem shares in conjunction with a proxy solicitation pursuant to the proxy rules and not pursuant to the tender offer rules. If the Company seeks stockholder approval in connection with a business combination, the Sponsor has agreed to vote its Founder Shares (as defined in Note 5), Private Placement Shares and any Public Shares purchased during or after the IPO in favor of approving a business combination. Additionally, each Public Stockholder may elect to redeem their Public Shares without voting, and if they do vote, irrespective of whether they vote for or against the proposed transaction. Notwithstanding the foregoing, the Charter provides that a Public Stockholder, together with any affiliate of such stockholder or any other person with whom such stockholder is acting in concert or as a “group” (as defined under Section 13 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”)), will be restricted from redeeming its shares with respect to more than an aggregate of 20% or more of the Class A common stock sold in the IPO, without the prior consent of the Company. The Company’s Sponsor, officers and directors (the “Initial Stockholders”) have agreed not to propose an amendment to the Charter that would affect the substance or timing of the Company’s obligation to redeem 100% of its Public Shares if the Company does not complete a business combination within the business combination period, unless the Company provides the Public Stockholders with the opportunity to redeem their shares of Class A common stock in conjunction with any such amendment. On December 16, 2022, the Company held a special meeting of its stockholders (the “First Special Meeting”). At the Special Meeting, the Company’s stockholders approved an amendment (the “First IMTA Amendment”) to the Company’s Investment Management Trust Agreement (the “IMTA”), dated October 5, 2021, with Continental Stock Transfer & Trust Company (“CST”), as trustee, and an amendment to the Company’s Charter (the “First Charter Amendment”), to extend the business combination period up to three times for three months each time (the “First Extension”). In connection with the First Special Meeting, the Sponsor agreed that if the First Charter Amendment and the First IMTA Amendment were approved at the First Special Meeting, the Sponsor, or one or more of its affiliates, members or third-party designees (in such capacity, the “Lender”), would lend to the Company up to $1,500,000 to be deposited into the Trust Account established in connection with the IPO. Accordingly, on December 20, 2022, the Company issued an unsecured promissory note in the principal amount of $1,500,000 (the “Promissory Note”) to the Lender, pursuant to which the Lender agreed to loan to the Company up to $1,500,000 in connection with the extension of the date by which the Company has to consummate an initial Business Combination. In connection with the approval of the Extension, holders of 16,211,702 Public Shares exercised redemption rights. As a result, following the satisfaction of such redemptions, as of December 31, 2022, the Company had 2,173,298 shares of Class A common stock outstanding, of which (i) 1,288,298 were Public Shares, which were entitled to receive a pro rata portion of the remaining funds in the Trust Account in connection with its initial Business Combination, a liquidation or certain other events, and (ii) 885,000 were Private Placement Shares, which did not have redemption rights. On March 31, 2023, May 8, 2023 and June 30, 2023, the Company deposited $100,000, $125,000 and $150,000 into the Trust Account in connection with the First Extension. On July 7, 2023, the Company held a special meeting of its stockholders (the “Second Special Meeting”). At the Second Special Meeting, the Company’s stockholders approved an amendment to the IMTA, as amended by the IMTA Amendment (the “Second IMTA Amendment”), and an amendment to the Company’s Charter, as amended by the Charter Amendment (the “Second Charter Amendment”), to extend the business combination period for up to six times for one month each time (the “Second Extension”). On July 7, 2023, July 28, 2023, September 1, 2023, October 4, 2023, November 2, 2023 and November 30, 2023, the Company deposited $37,052, $8,846, $22,949, $22,949, $22,949 and $22,949 into the Trust Account in connection with the Second Extension. As a result of the deposits described above, such payments and accrual of interest, the balance in the Trust Account as of December 31, 2023 is approximately $8.4 million. If the Company is unable to complete a business combination by January 8, 2024 (as extended) (the “business combination period”), the Company will (i) cease all operations except for the purpose of winding up, (ii) as promptly as reasonably possible but not more than ten business days thereafter, redeem the Public Shares, at a per-share price, payable in cash, equal to the aggregate amount then on deposit in the Trust Account including interest earned on the funds held in the Trust Account and not previously released to us to pay the Company’s franchise and income taxes (less up to $100,000 of interest to pay dissolution expenses), divided by the number of then outstanding Public Shares, which redemption will completely extinguish Public Stockholders’ rights as stockholders (including the right to receive further liquidating distributions, if any), subject to applicable law, and (iii) as promptly as reasonably possible following such redemption, subject to the approval of the Company’s remaining stockholders and the Company’s board of directors, dissolve and liquidate, subject in each case to the Company’s obligations under Delaware law to provide for claims of creditors and the requirements of other applicable law. The Initial Stockholders have agreed to waive their liquidation rights with respect to the Founder Shares and Private Placement Shares if the Company fails to complete a business combination within the business combination period. However, if the Initial Stockholders should acquire Public Shares in or after the IPO, they will be entitled to liquidating distributions from the Trust Account with respect to such Public Shares if the Company fails to complete a business combination within the business combination period. The underwriter has agreed to waive its rights to the deferred underwriting commission (see Note 6) held in the Trust Account in the event the Company does not complete a business combination within the business combination period, and, in such event, such amounts will be included with the other funds held in the Trust Account that will be available to fund the redemption of the Public Shares. In the event of such distribution, it is possible that the per share value of the residual assets remaining available for distribution (including Trust Account assets) will be only $10.20 per share held in the Trust Account. In order to protect the amounts held in the Trust Account, the Sponsor has agreed to be liable to the Company if and to the extent any claims by a vendor for services rendered or products sold to the Company, or a prospective target business with which the Company has discussed entering into a transaction agreement, reduce the amount of funds in the Trust Account. This liability will not apply with respect to any claims by a third party who executed a waiver of any right, title, interest or claim of any kind in or to any monies held in the Trust Account or to any claims under the Company’s indemnity of the underwriter of the IPO against certain liabilities, including liabilities under the Securities Act of 1933, as amended (the “Securities Act”). Moreover, in the event that an executed waiver is deemed to be unenforceable against a third party, the Sponsor will not be responsible to the extent of any liability for such third-party claims. The Company will seek to reduce the possibility that the Sponsor will have to indemnify the Trust Account due to claims of creditors by endeavoring to have all vendors, service providers (except the Company’s independent registered public accounting firm), prospective target businesses or other entities with which the Company does business, execute agreements waiving any right, title, interest or claim of any kind in or to monies held in the Trust Account. Business Combination Agreement with CERo Therapeutics, Inc. (“CERo”) On June 4, 2023, the Company entered into a business combination agreement and plan of reorganization (the “Business Combination Agreement”), by and among the Company, PBCE Merger Sub, Inc., a Delaware corporation (“Merger Sub”), and CERo. Immediately after the merger, the Company changed its name from Phoenix Biotech Acquisition Corporation to CERo Therapeutics Holdings, Inc. At the effective time (the “Effective Time”) of the of the merger between Merger Sub and CERo (the “Business Combination”), (i) each outstanding share of CERo common stock, par value $0.0001 per share (the “CERo common stock”), will be cancelled and converted into (a) the right to receive a number of shares of Class A common stock, par value $0.0001 per share (“Class A common stock”), equal to $50,000,000, minus divided divided multiplied dividing multiplied divided multiplied divided NASDAQ Notice On April 3, 2023, the Company received a letter (the “Letter”) from the staff at The Nasdaq Global Market (“Nasdaq”) notifying the Company that, for the 30 consecutive trading days prior to the date of the Letter, the Company’s common stock had traded at a value below the minimum $50,000,000 “Market Value of Listed Securities” (“MVLS”) requirement set forth in Nasdaq Listing Rule 5450(b)(2)(A), which is required for continued listing of the Company’s common stock on Nasdaq. The Letter is only a notification of deficiency, not of imminent delisting, and has no current effect on the listing or trading of the Company’s securities on Nasdaq. In order to bring the Company into compliance with the MVLS requirement, on July 3, 2023, the Sponsor elected to effect the Conversion. As of the date hereof, there are 6,246,207 shares of Class A common stock and no shares of Class B common stock issued and outstanding and entitled to vote. On September 7, 2023, the Company received a written notice (the “Notice”) from the Nasdaq Listing Qualifications Department of Nasdaq indicating that the Company was not in compliance with Listing Rule 5450(a)(2), which requires the Company to have at least 400 public holders for continued listing on the Nasdaq Global Market (the “Minimum Public Holders Rule”). The Notice is only a notification of deficiency, not of imminent delisting, and has no current effect on the listing or trading of the Company’s securities on Nasdaq Global Market. The Notice states that the Company has 45 calendar days to submit a plan to regain compliance with the Minimum Public Holders Rule. The Company has submitted a plan to regain compliance with the Minimum Public Holders Rule. If Nasdaq accepts the Company’s plan, Nasdaq may grant the Company an extension of up to 180 calendar days from the date of the Notice to evidence compliance with the Minimum Public Holders Rule. If Nasdaq does not accept the Company’s plan, the Company will have the opportunity to appeal the decision in front of a Nasdaq Hearings Panel. The MVLS deficiency was cured by the conversion of the Class B common stock into Class A common stock because the Class A common stock held by Sponsor count towards satisfying such requirement. The Company submitted a “plan of compliance” to NASDAQ indicating that the Company was aiming to be able to cure the deficiency upon closing of the Business Combination. Nasdaq has not responded. Inflation Reduction Act of 2022 (the “IR Act”) On August 16, 2022, the Inflation Reduction Act of 2022 (the “IR Act”) was signed into federal law. The IR Act provides for, among other things, a new U.S. federal 1% excise tax on certain repurchases of stock by publicly traded U.S. domestic corporations and certain U.S. domestic subsidiaries of publicly traded foreign corporations occurring on or after January 1, 2023. The excise tax is imposed on the repurchasing corporation itself, not its stockholders from which shares are repurchased. The amount of the excise tax is generally 1% of the fair market value of the shares repurchased at the time of the repurchase. However, for purposes of calculating the excise tax, repurchasing corporations are permitted to net the fair market value of certain new stock issuances against the fair market value of stock repurchases during the same taxable year. In addition, certain exceptions apply to the excise tax. The U.S. Department of the Treasury (the “Treasury”) has been given authority to provide regulations and other guidance to carry out and prevent the abuse or avoidance of the excise tax. Any redemption or other repurchase that occurs after December 31, 2022, in connection with a business combination, extension vote or otherwise, may be subject to the excise tax. Whether and to what extent the Company would be subject to the excise tax in connection with a business combination, extension vote or otherwise would depend on a number of factors, including (i) the fair market value of the redemptions and repurchases in connection with the business combination, extension or otherwise, (ii) the structure of a business combination, (iii) the nature and amount of any “PIPE” or other equity issuances in connection with a business combination (or otherwise issued not in connection with a business combination but issued within the same taxable year of a business combination) and (iv) the content of regulations and other guidance from the Treasury. In addition, because the excise tax would be payable by the Company and not by the redeeming holder, the mechanics of any required payment of the excise tax have not been determined. The foregoing could cause a reduction in the cash available on hand to complete a business combination and in the Company’s ability to complete a business combination. On July 17, 2023, the Company redeemed 523,341 shares of Class A common stock tendered for redemption by the Public Stockholders for a total redemption amount of $5,638,879 in connection with the implementation of the Extension. The Company evaluated the classification and accounting of the stock redemption under ASC 450, “Contingencies” to determine whether the Company should currently recognize an excise tax obligation associated therewith. ASC 450 states that when a loss contingency exists the likelihood that the future event(s) will confirm the loss or impairment of an asset, or the incurrence of a liability can range from probable to remote. Contingent liability must be reviewed at each reporting period to determine appropriate treatment. The Company evaluated whether a United States excise tax obligation should be recognized currently related to the stock redemption and concluded that this obligation should be recognized. As of December 31, 2023, the Company recorded $56,389 of excise tax liability calculated as 1% of shares redeemed on July 17, 2023. Any reduction to this liability resulting from either a subsequent stock issuance or an event giving rise to an exception that occurs within this tax year, will be recognized in the period (including an interim period) that such stock issuance or event giving rise to an exception occurs. Liquidity and Going Concern As of December 31, 2023, the Company had $96,873 in its operating bank accounts, $8,436,311 in marketable securities held in the Trust Account to be used for a business combination or to repurchase or redeem its Public Shares in connection therewith and a working capital deficit of $5,049,122. On May 9, 2023, the Company received a notice from the IRS stating an additional $182,308 of federal income taxes were due by May 22, 2023. The Company made this payment on June 23, 2023. The accompanying financial statements have been prepared assuming that the Company will continue as a going concern, which contemplates the realization of assets and satisfaction of liabilities in the normal course of business. The Company’s ability to continue as a going concern is dependent on its ability to raise additional capital to fund its research and development (“R&D”) activities and meet its obligations on a timely basis. Since inception, the Company has incurred net losses and operating cash flow deficits, resulting in an accumulated deficit of $14.2 million as of December 31, 2023. On February 14, 2024, the Company acquired the assets of CERo Therapeutics, Inc., closed a private placement with gross proceeds of $9.98 million, and assumed the R&D operations of CERo Therapeutics. Additional funds are necessary to maintain current operations and to continue R&D activities. However, there can be no assurance that sufficient funding will be available to allow the Company to successfully continue its R&D activities and planned regulatory filings with the Food and Drug Administration (“FDA”). If the Company is unable to obtain necessary funds, significant reductions in spending and the delay or cancellation of planned activities may be necessary. These actions would have a material adverse effect on the Company’s business, results of operations, and prospects. These conditions raise substantial doubt about the Company’s ability to continue as a going concern within one year from the date these financial statements are issued. The accompanying financial statements do not include any adjustments relating to the recoverability and classification of recorded asset amounts or the amounts and classification of liabilities that might result from the outcome of this uncertainty. |