| Summary of Significant Accounting Policies | Summary of Significant Accounting Policies Basis of Presentation The Company has prepared the accompanying financial statements in conformity with U.S. GAAP. The Company’s consolidated financial statements reflect the operations of the Company and its wholly owned subsidiary. All intercompany accounts and transactions have been eliminated in consolidation. Use of Estimates The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Significant estimates in the financial statements include stock-based compensation costs, right-of-use assets, accruals for research and development activities, contingent earnout liability, revenue interest liability, derivative liabilities, fair value of common stock warrants and income taxes. The Company evaluates its estimates and assumptions on an ongoing basis using historical experience and other factors and adjusts those estimates and assumptions when facts and circumstances dictate. Actual results could differ from those estimates. Reclassifications Certain prior year amounts have been reclassified to conform to the current year presentation. None of these reclassifications had a material impact on the Company’s consolidated financial statements. Segments The Company operates and manages its business as one reportable and operating segment. The Company is developing proprietary, bioengineered, acellular human tissues, advanced tissue constructs and organ systems that are designed to be used in the treatment of diseases and conditions across a range of anatomic locations in multiple therapeutic areas. The Company’s chief executive officer, who is the chief operating decision maker, reviews financial information on an aggregate basis for purposes of evaluating financial performance and allocating resources. Comprehensive Loss Comprehensive loss includes net loss as well as other changes in stockholders’ equity that result from transactions and economic events other than those with stockholders. There was no difference between net loss and comprehensive loss for the years ended December 31, 2023 and 2022. Cash and Cash Equivalents The Company considers all short-term, highly liquid investments, including certificates of deposit (“CDs”) purchased with an original maturity of three months or less at the date of purchase, to be cash equivalents. Cash deposits are held with financial institutions with investment-grade ratings in the U.S. Cash deposits typically exceed federally insured limits. As of December 31, 2023, cash and cash equivalents consisted of cash on deposit with banks denominated in U.S. dollars and investments in money market funds. As of December 31, 2022, cash and cash equivalents consisted of cash on deposit with banks denominated in U.S. dollars, investments in money market funds, and CDs maturing within three months of their purchase date. Restricted Cash The Company classifies as restricted cash all cash pledged as collateral to secure long-term obligations and all cash whose use is otherwise limited by contractual provisions. As of December 31, 2023 , restricted cash consisted of $0.2 million in funds maintained in a separate deposit account to secure a letter of credit for the benefit of the lessor of the Company’s headquarters lease, and $0.1 million in cash balances held as collateral for the Company’s employee credit card program. There was no restricted cash as of December 31, 2022 . The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the consolidated balance sheets to the total of the amounts shown in the consolidated statements of cash flows as of December 31, 2023 and 2022 . As of December 31, ($ in thousands) 2023 2022 Cash and cash equivalents $ 80,448 $ 149,772 Restricted cash included in prepaid expenses and other current assets 144 — Restricted cash included in other long-term assets 209 — Total cash, cash equivalents and restricted cash $ 80,801 $ 149,772 Short-term Investments The Company classifies its certificates of deposit as cash and cash equivalents or short-term investments and reassesses the appropriateness of the classification of its investments at the end of each reporting period. Certificates of deposit held for investment with an original maturity greater than three months are carried at amortized cost and reported as short-term investments on the consolidated balance sheets. The type of certificates of deposit that the Company invests in are not considered debt securities under Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) 320, Investments - Debt Securities. As of December 31, 2022, the Company had approximately $10.1 million in CDs. These cash deposits were deposited at a bank that is a member of the Certificate of Deposit Account Registry Service (“CDARS”), in which large deposits are divided into smaller amounts and placed with other Federal Deposit Insurance Corporation (“FDIC”) insured banks which are also members of the CDARS network. Those members issue CDs in amounts under $250,000, so that the entire deposit balance is eligible for FDIC insurance. As of December 31, 2022, the Company classified $8.0 million of its CDs as cash and cash equivalents and $2.1 million of its CDs as short-term investments on its consolidated balance sheets. The Company did not have any CDs as of December 31, 2023. Employee Retention Credit The Coronavirus Aid, Relief, and Economic Security Act (the “CARES Act”) provided refundable employee retention credits, which could be used to offset payroll tax liabilities. Under the provisions of the extension of the CARES Act, the Company qualified for the employee retention credit for the first three quarters of 2021, and the Company applied for the credit in February 2023. As there is no authoritative guidance under U.S. GAAP for accounting for grants to for-profit business entities, the Company accounted for the grant by applying Accounting Standards Codification (“ASC”) 450, Contingencies . The Company received an employee retention credit of $3.1 million in July 2023, and recognized the credit as income during the second quarter of 2023 after the Company received notices from the Internal Revenue Service, (the “IRS”), specifying the amount of the credit receivable, and all uncertainties were resolved regarding receipt of the credit. The Company recognized the credit as a component of other income (expense), net on the consolidated statement of operations and comprehensive loss during the year ended December 31, 2023 . Revenue Interest Liability On May 12, 2023, Humacyte, Inc. and Global entered into a Revenue Interest Purchase Agreement (the “Purchase Agreement”) with two purchasers, both affiliates of Oberland Capital Management LLC (the “Purchasers”), and another affiliate of Oberland, as agent for the Purchasers (the “Agent”). The revenue interest liability associated with the Purchase Agreement is presented net of a debt discount comprised of issuance costs, transaction costs, the fair value of a freestanding option agreement related to the Purchase Agreement, and the fair value of embedded derivatives requiring bifurcation on the consolidated balance sheets. The Company imputes interest expense associated with this liability using the effective interest rate method. The effective interest rate is calculated based on the rate that would enable the debt to be repaid in full over the anticipated life of the arrangement. The interest rate on the liability may vary during the term of the agreement depending on a number of factors, including the level and expected timing of forecasted net sales. If the level and timing of any forecasted net sales and related payments change, the Company will prospectively adjust the effective interest and the related amortization of the liability and related issuance costs on a quarterly basis. Contingent Derivative Liability The Purchase Agreement contains certain features that meet the definition of embedded derivatives requiring bifurcation as a separate compound financial instrument apart from the Revenue Interest Liability. The contingent derivative liability related to the Put Option, as defined in Note 6 — Revenue Interest Purchase Agreement, was initially measured at fair value upon issuance and is subject to remeasurement at each reporting period with changes in fair value recognized as other income (expense) in the consolidated statements of operations and comprehensive loss, classified in change in fair value of derivative liabilities. JDRF Award On April 1, 2023, the Company entered into an Industry Discovery and Development Partnership Agreement with JDRF International (“JDRF,” and such agreement, the “JDRF Agreement”) to further develop and perform preclinical testing of the Company’s Biovascular Pancreas (“BVP”), a product candidate designed to deliver insulin-producing islets using the HAV as a means of treating patients with type 1 diabetes. According to the terms of the JDRF Agreement, JDRF will provide funding up to $0.8 million (“JDRF Award”) based on the achievement of certain research and development milestones related to the BVP. The JDRF Agreement refers to the total cumulative payments the Company has received from JDRF as of any point in time as the “Actual Award.” The Company received the first milestone payment of $80 thousand in April 2023 upon execution of the JDRF Agreement. The Company determined that the JDRF Actual Award payments are to be classified as long-term debt under ASC 470, Debt in the consolidated balance sheets. The JDRF liability related to the Actual Award payments is reported at amortized cost, and as of December 31, 2023 the carrying value is $69 thousand and is included in other long-term liabilities in the consolidated balance sheet. In the event of a license, sale or transfer of the Company’s rights to the product’s technology identified in the JDRF Agreement or a change of control transaction, the Company is obligated to pay JDRF a payment equal to 10% of any license or purchase price payments received by the Company up to an amount equal to four times the Actual Award (the “Royalty Cap”), less any previous royalty payments paid towards the Royalty Cap (the “Disposition Payment”). The derivative liability related to the Disposition Payment, was initially measured at fair value upon issuance and is subject to remeasurement at each reporting period with changes in fair value recognized as other income (expense) in the consolidated statements of operations and comprehensive loss, classified in change in fair value of derivative liabilities. Revenue Recognition The Company’s revenues generally consist of grant revenues, including revenues generated under government and other awarded grants. Grant Revenue The Company generates revenue primarily from government and other awarded grants that reimburse the Company for certain allowable costs related to research and development efforts. In August 2017, the Department of Defense (“DoD”) granted the Company a cash award for work to support human tissue engineered blood vessels for vascular reconstruction in the injured warfighter. The final amount awarded to the Company totaled $6.8 million and the program ended in November 2022. Based on the terms of the research project award agreement associated with the DoD grant, allowable costs were reimbursed to the Company based on the percentage of completion of project milestones in accordance with milestone payment schedules set forth in the agreement. During the year ended December 31, 2022, the Company recognized revenue of $1.6 million, for reimbursement of certain allowable costs related to this grant. Revenue related to the DoD grant is included in grant revenue in the Company’s consolidated statements of operations and comprehensive loss. The Company has determined that the grant was not within the scope of ASC 606 as it did not meet the definition of a contract with a customer. The Company concluded that the grant met the definition of a contribution and was a nonexchange transaction and applied the contribution accounting model in Subtopic 958-605, Not-for-Profit-Entities-Revenue Recognition by analogy. The Company recognizes funding received from grants as revenue, rather than as a reduction of research and development expenses, because the Company is the principal in conducting the research and development activities and these grants are central to the Company’s ongoing operations. The Company recognizes revenue only after the qualifying expenses related to the grants have been incurred and it is reasonably assured that the expenses will be reimbursed and the revenue will be collectible. The related costs incurred are included in research and development expense in the Company’s consolidated statements of operations and comprehensive loss. Revenue from Customers Under ASC 606, revenue is recognized when a customer obtains control of promised goods or services and is recognized in an amount that reflects the consideration that an entity expects to receive in exchange for those goods or services. To determine revenue recognition for arrangements that an entity determines are within the scope of ASC 606, the entity performs the following five steps: (i) identify the contract(s) with a customer; (ii) identify the performance obligations in the contract; (iii) determine the transaction price; (iv) allocate the transaction price to the performance obligations in the contract; and (v) recognize revenue when (or as) the entity satisfies a performance obligation. ASC 606 also impacts certain other areas, such as the accounting for costs to obtain or fulfill a contract. In addition, ASC 606 requires disclosure of the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers. For contracts where the period between when the Company transfers a promised good or service to the customer and when the customer pays is one year or less, the Company has elected the practical expedient to not adjust the promised amount of consideration for the effects of a significant financing component. Concentration of Credit Risk Financial instruments which potentially subject the Company to concentrations of credit risk consist principally of cash and cash equivalents and short-term investments consisting of CDs. Total cash balances exceeded insured balances by the FDIC as of December 31, 2023 and 2022. The Company has cash equivalents that are invested in highly rated money market funds that are invested only in obligations of the U.S. government and its agencies. During the year ended December 31, 2022 , 100% of the Company’s total revenue related to the award it received from the DoD in August 2017. As of December 31, 2022 , 100% of the Company’s accounts receivable related to the DoD grant. Net Loss per Share Attributable to Common Stockholders Basic net loss per share attributable to common stockholders is computed by dividing net loss attributable to common stockholders by the weighted-average number of common shares outstanding during the period without consideration of potentially dilutive Common Stock. Diluted net loss per share attributable to common stockholders reflects the potential dilution that could occur if securities or other contracts to issue Common Stock were exercised or converted into Common Stock or resulted in the issuance of Common Stock that then shared in the earnings of the Company unless inclusion of such shares would be anti-dilutive. As the Company has incurred losses for the years ended December 31, 2023 and 2022, basic and diluted net loss per share is the same for each period. The following potential shares of Common Stock were excluded from the computation of diluted net loss per share for each period because including them would have had an antidilutive effect: Year Ended December 31, 2023 2022 Exercise of options under stock plan 11,919,421 7,203,874 Warrants to purchase common stock 5,588,506 5,588,506 The 15,000,000 Contingent Earnout Shares (defined below) are excluded from the anti-dilutive table for all periods presented, as such shares are contingently issuable until the share price of the Company exceeds specified thresholds that have not yet been achieved, or upon the occurrence of a change in control. The Option Agreement, as defined in Note 6 — Revenue Interest Purchase Agreement, is excluded from the anti-dilutive table for the year ended December 31, 2023 , based on the Company’s assumption that the Option Agreement will not be exercised unless the Company’s stock price exceeds $7.50 per share, the minimum purchase price under the Option Agreement. Fair Value of Financial Instruments Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in the principal or most advantageous market in an orderly transaction between market participants at the measurement date. ASC 820, Fair Value Measurement and Disclosures , establishes a hierarchy whereby inputs to valuation techniques used in measuring fair value are prioritized, or the fair value hierarchy. There are three levels to the fair value hierarchy based on reliability of inputs, as follows: • Level 1 — Observable inputs that reflect unadjusted quoted prices for identical assets or liabilities in active markets. • Level 2 — Inputs other than quoted prices included in Level 1 that are observable for the asset or liability, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. • Level 3 — Unobservable inputs in which little or no market data exists, therefore requiring the Company to develop its own assumptions. The Company evaluates assets and liabilities subject to fair value measurements on a recurring basis to determine the appropriate level at which to classify them for each reporting period, utilizing valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs to the extent possible. The determination requires significant judgments to be made by the Company. Property and Equipment, Net Property and equipment, net are recorded at cost less accumulated depreciation. Expenditures for major additions and improvements are capitalized and minor replacements, maintenance, and repairs are charged to expense as incurred. When property and equipment are retired or otherwise disposed of, the cost and accumulated depreciation are removed from the balance sheet accounts and any resulting gain or loss is included in the results of operations for the respective period. Depreciation is calculated using the straight-line method over the estimated useful lives of the related assets. The estimated useful lives for significant asset categories are as follows: Property and equipment Estimated Useful Scientific equipment 5 – 7 Computer equipment 5 Software 3 Furniture and fixtures 5 – 7 Leasehold improvements Lesser of useful life or life of lease Construction in progress N/A Impairment of Long-Lived Assets The Company reviews the carrying value of property and equipment for indicators of possible impairment whenever events and circumstances indicate that the carrying value of an asset or asset group may not be recoverable from the estimated future net undiscounted cash flows expected to result from its use and eventual disposition. In cases where estimated future net undiscounted cash flows are less than the carrying value, an impairment loss is recognized equal to an amount by which the carrying value exceeds the fair value of the asset or asset group. The factors considered by management in performing this assessment include current operating results, trends and prospects, the manner in which the property is used, and the effects of obsolescence, demand, competition, and other economic factors. Based on this assessment, during the years ended December 31, 2023 and 2022, respectively, the Company concluded there were no such events or changes in circumstances requiring review of the carrying amount of the Company’s long-lived assets and there was no impairment during the years ended December 31, 2023 and 2022. Income Taxes Income taxes are computed using the asset and liability approach that requires the recognition of deferred tax assets and liabilities for the expected future tax consequences of events that have been recognized in the Company’s financial statements. In estimating future tax consequences, the Company considers all expected future events other than enactment of changes in tax laws or rates. A valuation allowance is recorded, if necessary, to reduce net deferred tax assets to their realizable values if management does not believe it is more likely than not that the net deferred tax assets will be realized. As of December 31, 2023 and 2022, the Company has recorded a full valuation allowance against its deferred tax assets. The Company applies the accounting guidance for uncertainties in income taxes, which prescribes a recognition threshold and measurement process for recording uncertain tax positions taken, or expected to be taken, in a tax return in the financial statements. Additionally, the guidance also prescribes the treatment for derecognition, classification, accounting in interim periods and disclosure requirements for uncertain tax positions. The Company accrues for the estimated amount of taxes for uncertain tax positions if it is more likely than not that the Company would be required to pay such additional taxes. The Company recognizes the benefit of an income tax position only if it is more likely than not (greater than 50%) that the tax position will be sustained upon tax examination, based solely on the technical merits of the tax position. Otherwise, no benefit can be recognized. Assessing an uncertain tax position begins with the initial determination of the sustainability of the position and is measured at the largest amount of benefit that is greater than 50% likely of being realized upon ultimate settlement. As of each balance sheet date, unresolved uncertain tax positions must be reassessed. Additionally, the Company must accrue interest and related penalties, if applicable, on all tax exposures for which reserves have been established consistent with jurisdictional tax laws. The Company has analyzed its filing positions in all significant Federal and state jurisdictions where it is required to file income tax returns, as well as open tax years in these jurisdictions. As of December 31, 2023 and 2022, the Company has determined that no uncertain tax positions would have a material impact on the financials statements of the Company. The Company is no longer subject to Federal, state, and local tax examinations by tax authorities for years before 2020 although carry-forward attributes that were generated prior to 2020 may still be adjusted upon examination by the taxing authorities if they either have been or will be used in a future period. No income tax returns are currently under examination by taxing authorities. As of December 31, 2023 and 2022, the Company had not recorded any amounts for unrecognized tax benefits. The Company’s policy is to recognize interest and penalties related to uncertain tax positions in the provision for income taxes. As of December 31, 2023 and 2022, the Company had no accrued interest or penalties related to uncertain tax positions, and no amounts had been recognized in the Company’s statements of operations and comprehensive loss. Intellectual Property The Company seeks to protect its intellectual property by filing patent applications in the United States and abroad related to novel technologies and product candidates that it views as important to its business. The patent positions of biotechnology companies generally, including the Company’s patent positions, is highly uncertain and involves complex legal and factual questions for which legal principles remain unresolved. Patent costs have been expensed as incurred as general and administrative expense. Research and Development The Company expenses research and development costs as operating expenses as incurred. Research and development expenses consist primarily of: • salaries and related overhead expenses for personnel in research and development functions, including stock-based compensation and benefits; • fees paid to consultants and CROs, including in connection with clinical trials, and other related clinical trial fees, such as for investigator grants, patient screening, laboratory work and statistical compilation and analysis; allocation of facility lease and maintenance costs; • depreciation of leasehold improvements, laboratory equipment and computers; • costs related to purchasing raw materials for and producing product candidates for clinical trials; • costs related to compliance with regulatory requirements; • costs related to the manufacturing scale-out initiative; and • license fees related to in-licensed technologies. Accrued Research and Development The Company has entered into various agreements with CROs, which conduct preclinical studies and clinical trials. The Company’s research and development accruals are estimated based on the level of services performed, progress of the studies, including the phase or completion of events, and contracted costs. The estimated costs of research and development provided, but not yet invoiced, are included in accrued expenses on the balance sheet. If the actual timing of the performance of services or the level of effort varies from the original estimates, the Company will adjust the accrual accordingly. Payments made under these arrangements in advance of the performance of the related services are recorded as prepaid expenses and other current assets until the services are rendered. Stock-Based Compensation The Company accounts for stock-based compensation for employees and non-employees measured at grant date, based on the fair value of the award. The Company measures the fair value of awards granted using the Black-Scholes option pricing model and recognizes the expense over the requisite service period using the straight-line method. Option valuation models, including the Black-Scholes option-pricing model, require the input of highly subjective assumptions, and changes in the assumptions used can materially affect the grant-date fair value of an award. These assumptions include the risk-free rate of interest, expected dividend yield, expected volatility, the expected term of the award, and the fair value of the underlying Common Stock on the date of grant. Forfeitures are accounted for as they occur. Common Stock Warrants In connection with the Merger, the Company assumed 5,000,000 publicly-traded warrants (“Public Warrants”) and 177,500 private placement warrants issued to AHAC Sponsor LLC (the “Sponsor”), Oppenheimer & Co. Inc. and Northland Securities, Inc, in connection with AHAC’s initial public offering (“Private Placement Warrants” and, together with the Public Warrants, the “Common Stock Warrants”). The Common Stock Warrants entitle the holder to purchase one share of the Company’s Common Stock, at an exercise price of $11.50 per share. The Public Warrants are publicly traded and are exercisable for cash unless certain conditions occur, such as the failure to have an effective registration statement related to the shares issuable upon exercise or redemption by the Company under certain conditions, at which time the warrants may be eligible for a cashless exercise. The Private Placement Warrants are non-redeemable for cash so long as they are held by the initial purchasers or their permitted transferees. If the Private Placement Warrants are held by someone other than the initial purchasers or their permitted transferees, the Private Placement Warrants are redeemable by the Company and exercisable by such holders on the same basis as the Public Warrants. The Company evaluated the Common Stock Warrants to determine the appropriate financial statement classification upon the consummation of the Merger. The Common Stock Warrants are not mandatorily redeemable and are considered to be freestanding instruments as they are separately exercisable into common shares. As such, the Common Stock Warrants were not classified as liabilities under FASB ASC Topic 480, Distinguishing Liabilities from Equity (“ASC 480”). The Company then evaluated the Common Stock Warrants under FASB ASC Topic 815, Derivatives and Hedging . The agreement governing the Common Stock Warrants includes a provision (“Replacement of Securities Upon Reorganization”), the application of which could result in a different settlement value for the Private Placement Warrants depending on their holder. Because the holder of an instrument is not an input into the pricing of a fixed-for-fixed option on the Company’s ordinary shares, the Private Placement Warrants are not considered to be “indexed to the Company’s own stock” and therefore are not classified in stockholders’ equity. As the Private Placement Warrants meet the definition of a derivative, the Company recorded these warrants as liabilities on the consolidated balance sheet at fair value, with subsequent changes in their respective fair values recognized in the consolidated statements of operations and comprehensive loss at each reporting date. The Public Warrants are considered to be “indexed to the Company’s own stock”. The agreement provides that in the event of a tender or exchange offer made to and accepted by holders of more than 50% of the outstanding shares of the Company’s common shares, all holders of the Common Stock Warrants (both the Public Warrants and the Private Placement Warrants) would be entitled to receive cash for all of their Common Stock Warrants. As the Company has a single class of common stock, a qualifying cash tender offer of more than 50% of the Company’s common stock will always result in a change-in-control and would not preclude permanent equity classification of the Public Warrants. Based on this evaluation, the Company concluded that the Public Warrants meet the criteria to be classified within stockholders’ equity. Contingent Earnout Liability Pursuant to the Merger Agreement, following the closing of the Merger (the “Closing”), Legacy Humacyte equity holders are entitled to receive additional merger consideration of up to 15,000,000 shares of the Company’s Common Stock (the “Contingent Earnout Shares”), comprised of two separate tranches of 7,500,000 shares per tranche, for no consideration upon the occurrence of certain triggering events, including a change of control event that is not solely indexed to the Common Stock. In accordance with ASC 815-40, as the earnout shares were not indexed to the common stock, they were accounted for as a liability (“Contingent Earnout Liability”) at the Reverse Recapitalization date and subsequently remeasured at each reporting date with changes in fair value recorded as a component of other income (expense), net in the consolidated statements of operations and comprehensive loss. The estimated fair value of the Contingent Earnout Liability was determined using a Monte Carlo simulation using a distribution of potential outcomes on a monthly basis over a 10-year period prioritizing the most reliable information available. The assumptions utilized in the calculation were based on the achievement of certain stock price milestones, including the current Common Stock price, expected volatility, risk-free rate, expected term and expected dividend yield. The Contingent Earnout Shares are categorized as a Level 3 fair value measurement (see “Fair Value of Financial Instruments” accounting policy described above) because the Company estimated projections over a 10-year period utilizing unobservable inputs. Contingent earnout payments involve certain assumptions requiring significant judgment and actual results can differ from assumed and estimated amounts. Leases The Company accounts for its leases under ASC 842, Leases . The Company determines if an arrangement is or contains a lease and the classification of that lease at inception of a contract. The Company’s operating lease assets are included in “other long |
