Summary of Significant Accounting Policies | 2. Summary of Significant Accounting Policies There have been no material changes to the Company’s significant accounting policies from those described in the notes to the audited consolidated financial statements of the Company contained in the Annual Report. Risks and Uncertainties Use of Estimates The preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. On an ongoing basis, the Company evaluates its estimates, including those related to the valuation of share-based awards and MDS, the discount rate used in estimating the present value of the right-of-use (ROU) Due to recent disruptions in access to bank deposits and lending commitments associated with bank failures, the COVID-19 no Concentrations of Credit Risk Financial instruments that potentially subject the Company to significant concentrations of credit risk consist primarily of cash and cash equivalents, restricted cash, MDS, and accounts receivable which are generally not collateralized. Deposits in the Company’s checking and money market accounts are maintained in federally insured financial institutions and are subject to federally insured limits or limits set by the Securities Investor Protection Corporation. In addition, the Company maintains cash and cash equivalents in foreign bank accounts, which are not federally insured. The Company attempts to minimize credit risk associated with its cash and cash equivalents by periodically evaluating the credit quality of its primary financial institutions. The Company’s investment portfolio is maintained in accordance with its investment policy, which is designed to preserve capital, safeguard funds and limit exposure to risk. While the Company maintains cash deposits in Federal Deposit Insurance Corporation insured financial institutions in excess of federally insured limits, it does not believe that it is exposed to significant credit risk due to the financial position of the depository institutions in which those deposits are held. The Company has not experienced any losses on such accounts. During the three months ended June 30, 2023 and 2022, revenues from the Company’s top customer represented 98.0% and 97.3% of total revenues, respectively. During the six months ended June 30, 2023, revenues from the Company’s top customer represented 95.9% of total revenues. During the six months ended June 30, 2022, revenues from the Company’s top two customers represented 85.3% and 12.9% of total revenues, respectively. As of June 30, 2023, billed accounts receivable for the top two customers represented 86.2% and 13.8% of total billed receivables, respectively. As of June 30, 2022, billed accounts receivable for the top two customers represented 53.2% and 43.4% of total billed receivables, respectively. Cash, Cash Equivalents and Restricted Cash Cash and cash equivalents consist of readily available cash in checking accounts, U.S. government securities, certificates of deposit, money market funds and other MDS with original maturities of three months or less. The following table provides a reconciliation of cash, cash equivalents and restricted cash, reported within the condensed consolidated statements of cash flows (in thousands): For the Six Months 2023 2022 Cash and cash equivalents $ 228,265 $ 65,642 Restricted cash 665 831 Total cash, cash equivalents, and restricted cash presented in the condensed consolidated statements of cash flows $ 228,930 $ 66,473 As of June 30, 2023 and 2022, the Company’s restricted cash consists of cash related to the Company’s clinical trials. Accounts Receivable, Net Accounts receivable, net, are recorded net of any allowance for current expected credit losses measured based on historical experience, current conditions, and reasonable and supportable forecasts. As of June 30, 2023 and December 31, 2022, the Company has determined an allowance for expected credit losses is not material. Intangible Assets, Net The Company records its intangible assets based on their fair values at the date of acquisition. The Company’s finite lived intangible assets related to acquired technologies has estimated remaining useful lives between approximately two and a half three Impairment losses on finite-lived intangible assets are recorded when indicators of impairment are present and the undiscounted cash flows estimated to be generated by those assets are less than the assets’ carrying amount. If such assets are considered impaired, the impairment to be recognized is measured by the amount by which the carrying amount of the assets exceeds the estimated fair value of the assets. In the first quarter of 2022, the Company received a Notice of Termination of Collaboration and License agreement (Relaxin) between Bristol-Myers Squibb Company (BMS) and the Company (the Relaxin Agreement) from BMS to be effective three months from receipt of the notification. Due to this termination notice and the Company’s determination that the asset had no alternative future use, the Company concluded the net carrying value of the BMS Relaxin intangible asset was greater than its estimated fair value and therefore recorded an impairment charge of $2.5 million. In the second quarter of 2022, the Company received verbal notification from BMS of its intent to terminate the Collaboration and License Agreement (FGF-21) FGF-21 FGF-21 The Company’s intangible assets also include acquired in-process While the Company’s current and historical operating losses and negative cash flows are possible indicators of impairment, management believes future cash flows to be generated by its remaining long-lived assets support the carrying value. There were no impairment charges recognized during the three and six months ended June 30, 2023. Net Loss Per Share Attributable to Ambrx Biopharma Inc Ordinary Shareholders Basic net loss per ordinary share is calculated by dividing the net loss attributable to ordinary Ambrx shareholders by the weighted-average number of ordinary shares outstanding during the period, without consideration for potentially dilutive securities. Diluted net loss per share is computed by dividing the net loss attributable to ordinary shareholders by the weighted-average number of ordinary shares and potentially dilutive securities outstanding for the period determined using the treasury-stock and if-converted methods. For purposes of the diluted net loss per share calculation, potentially dilutive securities are excluded from the calculation of diluted net loss per share because their effect was anti-dilutive and therefore, basic and diluted net loss per share were the same for all periods presented. Potentially dilutive securities are excluded from the calculation of diluted net loss per share as their effect is anti-dilutive. For the periods presented, the following table presents potentially dilutive securities, excluded from the computation of diluted net loss per ordinary share: Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 Outstanding stock options 45,302,442 39,829,831 45,302,442 39,829,831 Outstanding RSUs 4,090,000 — 4,090,000 — Total 49,392,442 39,829,831 49,392,442 39,829,831 Share-Based Compensation The Company accounts for share-based compensation under the provisions of ASC Topic 718, Compensation—Stock Compensation Note 11—Share-Based Compensation Recent Accounting Pronouncements From time to time, new accounting pronouncements are issued by the Financial Accounting Standards Board or other standards setting bodies that are adopted as of the specified effective date. The Company believes the impact of recently issued standards and any issued but not yet effective standards will not have a material impact on its condensed consolidated financial statements upon adoption. | 2. Summary of Significant Accounting Policies Use of Estimates The preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. On an ongoing basis, the Company evaluates its estimates, including those related to the valuation of share-based awards, MDS, and other fair value measurements, the discount rate used in estimating the present value of the right-of-use (ROU) assessed each reporting period and updated to reflect current information. As Due to the recent disruption in access to bank deposits and lending commitments due to bank failures, the COVID-19 Segment Reporting Operating segments are identified as components of an enterprise about which separate discrete financial information is available for evaluation by the chief operating decision-maker, who is the Chief Executive Officer of the Company, in making decisions regarding resource allocation and assessing performance. The Company views its operations and manages its business in one operating segment. Risk and Uncertainties Since December 2019, COVID-19, The full extent to which the COVID-19 COVID-19 COVID-19, Concentrations of Credit Risk Financial instruments that potentially subject the Company to significant concentrations of credit risk consist primarily of cash and cash equivalents, restricted cash, MDS, and accounts receivable which are generally not collateralized. Deposits in the Company’s checking and money market accounts are maintained in federally insured financial institutions and are subject to federally insured limits or limits set by the Securities Investor Protection Corporation. In addition, the Company maintains cash and cash equivalents in foreign bank accounts, which are not federally insured. The Company attempts to minimize credit risk associated with its cash and cash equivalents by periodically evaluating the credit quality of its primary financial institutions. The Company’s investment portfolio is maintained in accordance with its investment policy, which is designed to preserve capital, safeguard funds and limit exposure to risk. While the Company maintains cash deposits in FDIC insured financial institutions in excess of federally insured limits, it does not believe that it is exposed to significant credit risk due to the financial position of the depository institutions in which those deposits are held. The Company has not experienced any losses on such accounts. During the year ended December 31, 2022, revenues from the Company’s top two customers represented 65.9% and 25.6% of total revenues, respectively. During the year ended December 31, 2021, revenues from the Company’s top two customers represented 56.8% and 35.8% of total revenues, respectively. As of December 31, 2022, billed accounts receivable for two customers represented 78.4% and 11.8% of total billed receivables, respectively. As of December 31, 2021, billed accounts receivable for two customers represented 74.6% and 21.3% of total billed receivables, respectively. Cash, Cash Equivalents and Restricted Cash Cash and cash equivalents consist of readily available cash in checking accounts, money market funds and other MDS with original maturities of three months or less. The following table provides a reconciliation of cash, cash equivalents and restricted cash, reported within the consolidated statements of cash flows for the years ended December 31, (in thousands): 2022 2021 Cash and cash equivalents $ 55,610 $ 170,064 Restricted cash 831 842 Total cash, cash equivalents, and restricted cash presented in the consolidated statements of cash flows $ 56,441 $ 170,906 As of December 31, 2022 and 2021, the Company’s restricted cash consists of cash related to the Company’s clinical trials. Accounts Receivable, Net Accounts receivable, net, are recorded net of any allowance for current expected credit losses measured based on historical experience, current conditions, and reasonable and supportable forecasts. As of December 31, 2022 and 2021, the Company has determined an allowance for expected credit losses is not material. Contract Balances The timing of revenue recognition, billings and cash collections results in billed accounts receivable, unbilled receivables (contract assets) and deferred revenue (contract liabilities) on the consolidated balance sheet, recorded on a contract-by-contract The majority of the Company’s contract amounts are invoiced as work progresses in accordance with agreed-upon contractual terms, either at periodic intervals or upon achievement of contractual milestones. Billing sometimes occurs subsequent to revenue recognition, resulting in contract assets. These contract assets are referred to as unbilled receivables and are reported within prepaid expenses and other current assets on the consolidated balance sheets. Unbilled receivables are transferred to accounts receivables, net, when the Company’s right of receipt becomes unconditional. Contract liabilities from the Company’s R&D agreements (R&D Agreements) arise when amounts invoiced to customers exceed revenues recognized based upon measure of progress achieved. Contract liabilities additionally include advanced payments from customers on certain contracts. Contract liabilities decrease as the Company recognizes revenue from the satisfaction of the related performance obligation. Contract liabilities are included in deferred revenue, current portion and deferred revenue, net of current portion, on the consolidated balance sheets. Marketable Debt Securities, Available-for-Sale The Company’s MDS portfolio, which is classified as available-for-sale, liquidity, with acceptable levels of risk. The investment policy limits interest-bearing security investments to certain types of debt and money market instruments issued by institutions with investment grade credit ratings, and it places restrictions on maturities and concentrations by asset class and issuer. MDS are classified as either current or non-current non-current The Company’s MDS are stated at fair value, with unrealized gains and losses, net of tax, if any, reported in accumulated other comprehensive loss in the consolidated balance sheets, until disposition or maturity. Dividend and interest income, amortization/accretion of premiums and discounts, and realized gains and losses, which are determined using the specific identification method, are recognized in investment income, net, in the consolidated statements of operations and comprehensive loss. MDS are subject to a periodic impairment review. If the Company does not intend to sell and it is not more likely than not that it will be required to sell the security prior to recovery of its amortized cost basis, the Company will determine whether a decline in fair value below the amortized cost basis is due to credit-related factors. The credit loss is measured as the amount by which the debt security’s amortized cost basis exceeds the estimate of the present value of cash flows expected to be collected, up to the difference between the amortized cost basis and the fair value. Impairment is assessed at the individual security level. Credit-related impairment is recognized as an allowance in the consolidated balance sheets with a corresponding adjustment to investment income, net, in the consolidated statements of operations and comprehensive loss. Any impairment that is not credit-related is recognized in accumulated other comprehensive loss in the consolidated balance sheets. The Company does not separately measure an allowance for credit losses on accrued interest receivables on its MDS. The Company writes off accrued interest receivables by reversing interest income in the period deemed uncollectible in investment income, net, in the Company’s consolidated statements of operations and comprehensive loss. Any accrued interest receivable on MDS is recorded in prepaid expenses and other current assets in the consolidated balance sheets. Property and Equipment, Net Property and equipment is recorded at cost and depreciated over the estimated useful lives of the assets using the straight-line method. Leasehold improvements are stated at cost and are amortized on a straight-line basis over the lesser of the remaining term of the related lease or the estimated useful lives of the assets. Repairs and maintenance costs are charged to expense as incurred and improvements and betterments are capitalized. Depreciation is calculated over their estimated useful lives as follows: Laboratory equipment 5 years Computer, software and office equipment 3 - 8 years Furniture and fixtures 5 years The useful lives of the Company’s assets are reviewed annually. When assets are retired or otherwise disposed of, the cost and accumulated depreciation are removed from the consolidated balance sheets and any resulting gain or loss is reflected in the consolidated statements of operations and comprehensive loss in the period realized. Intangible Assets, Net The Company records its intangible assets based on their fair values at the date of acquisition. The Company’s finite lived intangible assets related to acquired technologies has estimated remaining useful lives between three four Impairment losses on finite-lived intangible assets are recorded when indicators of impairment are present and the undiscounted cash flows estimated to be generated by those assets are less than the assets’ carrying amount. If such assets are considered impaired, the impairment to be recognized is measured by the amount by which the carrying amount of the assets exceeds the estimated fair value of the assets. During the fourth quarter of 2021, the Company determined the estimated undiscounted future cash flows of one of its acquired technology intangible assets was less than its carrying value and therefore recorded an impairment charge of $0.5 million. In the first quarter of 2022, the Company received a Notice of Termination of Collaboration and License agreement (Relaxin) between Bristol-Myers Squibb Company (BMS) and the Company (the Relaxin Agreement) from BMS to be effective three months from receipt of the notification. Due to this termination notice and the Company’s determination that the asset had no alternative future use, the Company concluded the net carrying value of the BMS Relaxin intangible asset was greater than its estimated fair value and therefore recorded an impairment charge of $2.5 million. In the second quarter of 2022, the Company received verbal notification from BMS of its intent to terminate the Collaboration and License Agreement (FGF-21) FGF-21 FGF-21 The Company’s intangible assets also include acquired in-process The Company’s annual impairment test for the years ended December 31, 2022 and 2021, performed in the fourth quarter, did not result in additional impairment losses related to its intangible assets. While the Company’s current and historical operating losses and negative cash flows are possible indicators of impairment, management believes future cash flows to be generated by its remaining long-lived assets support the carrying value. Fair Value of Financial Instruments The Company’s financial instruments consist primarily of cash and cash equivalents, MDS, accounts receivable, accounts payable and accrued liabilities. The carrying amounts of cash and cash equivalents, accounts receivable, accounts payable and accrued liabilities are considered to be representative of their respective fair values because of the relatively short-term nature of those instruments. The accounting guidance defines fair value, establishes a consistent framework for measuring fair value and expands disclosure for each major asset and liability category measured at fair value on either a recurring or nonrecurring basis. Fair value is defined as an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. As such, fair value is a market-based measurement that should be determined based on assumptions that market participants would use in pricing an asset or liability. As a basis for considering such assumptions, the accounting guidance establishes a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value as follows: Level 1: Level 2: Level 3: Assets and liabilities are classified based on the lowest level of input that is significant to the fair value measurements. The Company reviews the fair value hierarchy classification on a quarterly basis. Clinical Trial Accruals As part of the process of preparing the consolidated financial statements, the Company is required to estimate expenses resulting from obligations under contracts with vendors, clinical research organizations, consultants and under clinical site agreements relating to conducting clinical trials. The financial terms of these contracts vary and may result in payment flows that do not match the periods over which materials or services are provided under such contracts. The Company’s objective is to reflect the appropriate clinical trial expenses in its consolidated financial statements by recording those expenses in the period in which services are performed and efforts are expended. The Company accounts for these expenses according to the progress of the clinical trial as measured by patient progression and the timing of various aspects of the clinical trial. Management determines accrual estimates, as of each balance sheet date, through discussions with applicable personnel and outside service providers as to the progress of clinical trials. During a clinical trial, the Company adjusts its expense recognition if actual results differ from previous estimates. Leases The Company determines if an arrangement is a lease at the inception of the contract. The asset component of the Company’s operating leases is recorded as a ROU asset and the liability component is recorded as current portion of operating lease liabilities and operating lease liabilities, net of current portion, in the consolidated balance sheets. At the commencement, reassessment or modification date, the cost of the ROU asset includes all the following, if any: the amount of the initial measurement of the lease liability, any lease payments made to the lessor at or before the commencement date minus any lease incentive received and any initial direct costs incurred by the lessee. Operating lease liabilities are recognized based on the present value of lease payments over the lease term at the commencement date. The Company uses an incremental borrowing rate based on the information available at commencement date in determining the present value of lease payments if an implicit rate of return is not provided within the lease contract. When evaluating its incremental borrowing rate, management considers its borrowing rate on external collateralized debt with a term commensurate with the lease term, if any, or in the absence of external debt, the average incremental borrowing rate of its peer group. These amounts are estimated at the inception of or upon reassessment of a lease arrangement. Lease cost is recognized on a straight-line basis over the lease term, and includes amounts related to short-term leases. Variable lease costs, such as common area maintenance, real estate taxes and management fees which do not depend on an index or rate are recognized as incurred. Short-term leases of 12 months or less are expensed as incurred, which approximates the straight-line basis due to the short-term nature of the leases. The Company has elected not to separate lease and non-lease ROU assets and operating lease liabilities are remeasured upon lease reassessment using the present value of remaining lease payments and estimated incremental borrowing rates. The Company reviews any changes to its lease agreements for potential modifications and/or indicators of impairment of the respective ROU asset. Revenue Recognition The Company determines revenue recognition for arrangements within the scope of ASC Topic 606, Revenue from Contracts with Customers The terms of the Company’s R&D Agreements include upfront fees, R&D funding or reimbursements, milestone and other contingent payments for the achievement of defined objectives and certain preclinical, clinical, regulatory and sales-based events, as well as royalties on sales of commercialized products. Agreements with certain upfront payments may require deferral of revenue recognition to a future period until the Company performs the obligations under these agreements. The Company uses the most likely amount method to estimate variable consideration for event-based milestones and other contingent payments and have been fully constrained given the degree of uncertainty around the occurrence of such events. The Company continues to re-evaluate The Company is required to adjust the transaction price for the effects of the time value of money if the timing of payments agreed to by the parties to the contract, explicitly or implicitly, provides the Company or its customer with a significant benefit of financing the transfer of goods or services. The Company concluded that its contracts with the customers do not contain a significant financing component because the payment structure of the R&D Agreements arises from reasons other than providing a significant benefit of financing. Taxes assessed by a governmental authority that are both imposed on and concurrent with a specific revenue-producing transaction, that are collected by the Company from a customer, are excluded from revenues. R&D Agreements The Company analyzes its R&D Agreements to assess whether they are within the scope of ASC Topic 808, Collaborative Arrangements significant risks and rewards dependent on the commercial success of such activities. This assessment is performed at contract inception and again, if changes in either the roles of the participants in the arrangement or the participants’ exposure to significant risks and rewards dependent on the ultimate commercial success of the arrangement are identified. For each of the periods presented, the Company determined that its contracts with customers do not fall within the guidance in ASC 808 as the Company is not exposed to significant risks that are dependent on commercial success of the collaborative activity. License Fees As part of the R&D Agreements, the Company licenses its intellectual property to customers for fees, which many times includes the receipt of upfront fees. If a license to the Company’s intellectual property is determined to be distinct from the other promises or performance obligations identified in the agreement, the Company recognizes revenue from non-refundable, In assessing whether a promise or performance obligation is distinct from the other promises, the Company considers factors such as the research, development, manufacturing and commercialization capabilities of the licensee and the availability of the associated expertise in the general marketplace. In addition, the Company considers whether the licensee can benefit from a promise for its intended purpose without the receipt of the remaining promise, whether the value of the promise is dependent on the unsatisfied promise, whether there are other vendors that could provide the remaining promise, and whether it is separately identifiable from the remaining promise. For licenses that are combined with other promises, the Company utilizes judgment to assess the nature of the combined performance obligation to determine whether the combined performance obligation is satisfied over time or at a point in time and, if over time, the appropriate method of measuring progress for purposes of recognizing revenue. For those license related performance obligations that are satisfied over time, the Company measures progress through actual effort, including hours incurred, and an estimation of time to completion based on the budget and research workplan. Typical agreements require the transfer of knowledge so the customer can effectively use the license and the Company believes these measurements accurately represent the transfer of knowledge through its clinical research services. The Company evaluates the measure of progress each reporting period and, if circumstances change over time, the Company will update its measure of progress to reflect any changes in the outcome of the performance obligation and, therefore, adjust the measure of performance and related revenue recognition. The measure of progress, and thereby periods over which revenue should be recognized, is subject to estimates by management and may change over the course of the agreement. Such a change could have a material impact on the amount of revenues the Company records in future periods. During the second half of 2021, the Company re-evaluated re-evaluation, catch-up Reimbursements As part of the R&D Agreements where the Company only provides R&D services, the Company is reimbursed by the customer for certain costs incurred as agreed to in the research plan. The Company elected the practical expedient for certain R&D reimbursements which allows it to recognize revenue in the amount for which the Company has a right to invoice if its right to consideration is an amount corresponding directly to the value of completed performance to date. The Company estimates variable consideration, if any, at contract inception and each reporting period, to determine if there were any changes in the transaction price. The transaction price will be adjusted to the extent the risk of significant revenue reversal in the amount of cumulative revenue recognized will not occur when the uncertainty associated with the milestones are subsequently resolved. Any such adjustments are recorded on a cumulative catch-up Milestones and Other Contingent Payments At the inception of each R&D Agreement that includes milestones and other contingent payments, the Company evaluates whether the milestones or other contingent payments are considered probable of being achieved and estimates the amount to be included in the initial transaction price using the most likely amount method. If it is probable that a significant revenue reversal would not occur, the associated value is included in the transaction price. Milestones or other contingent payments are only included in the transaction price to the extent the risk of a significant revenue reversal in the amount of cumulative revenue recognized will not occur when the uncertainty associated with the milestones are subsequently resolved. The Company evaluates factors such as the scientific, clinical, regulatory, commercial, and other risks that must be overcome to achieve the particular contingency in making this assessment. There is considerable judgment involved in determining whether it is probable that a significant revenue reversal would not occur. At the end of each subsequent reporting period, the Company reevaluates catch-up Sales-Based Milestones and Royalties on Sales of Commercialized Products For R&D Agreements that include sales-based milestone payments and royalties which are the result of a customer-vendor relationship and for which the license is deemed to be the predominant item to which the royalties relate, the Company recognizes revenue at the later of (i) when the related sales occur, or (ii) when the performance obligation to which some or all of the royalty has been allocated has been satisfied or partially satisfied. R&D Services Promises under the Company’s R&D Agreements may include R&D services to be performed by the Company on behalf of the counterparty. If these services are determined to be distinct from the other promises or performance obligations identified in the arrangement, the Company recognizes the transaction price allocated to these services as revenue over time based on an appropriate measure of progress of the performance. If these services are determined not to be distinct from the other promises or performance obligations identified in the arrangement, the Company recognizes the transaction price allocated to the combined performance obligation as the related performance obligation is satisfied. For those R&D services that are satisfied over time, the Company, measures progress through actual effort, including hours incurred, and an estimation of time to completion based on the budget and research workplan. Typical agreements require the transfer of knowledge and development of drug products and the Company believes these measurements accurately represent the transfer of clinical research services. Customer Options If an arrangement contains customer options, the Company evaluates whether the options are material rights because they allow the customer to acquire additional goods or services for free or at a discount incremental to the range of discounts typically given to a similar class of customers. If the customer options are determined to represent a material right, the material right is recognized as a separate performance obligation at the outset of the arrangement. The Company allocates the transaction price to material rights based on the relative stand-alone selling price, which is determined based on the identified discount and the probability that the customer will exercise the option. Amounts allocated to a material right are not recognized as revenue until, at the earliest, the future goods or services are transferred or upon expiration of the option. If the options are deemed not to be a material Research and Development Expense R&D expenses consist primarily of costs incurred in connection with the development of the Company’s technology platform, product candidates, discovery efforts and preclinical and clinical development of its product candidates. The Company’s research and development expenses include third-party costs with contract research organizations, contract manufacturing organizations and others conducting R&D activities and clinical trials on the Company’s behalf, manufacturing costs, outside consultant costs, laboratory supply and clinical trial material costs, and license payments for intellectual property used in R&D activities. The Company’s R&D expenses also include personnel costs, such as salaries, benefits, and other employee related costs, including share-based compensation, for personnel engaged in the Company’s R&D functions, amortization of finite-lived intangible assets, facility and equipment related costs, which include depreciation and amortization costs and expenses for rent and maintenance of facilities and other operating costs if specifically identifiable to R&D activities. General and Administrative Expense General and administrative (G&A) expenses include personnel costs, such as salaries and other related costs, including share-based compensation, for personnel in the Company’s executive, finance, business development, information technology, human resources, operations and administrative functions. G&A expenses also include legal fees relating to intellectual property and corporate matters, professional fees for accounting, auditing, tax and consulting services, insurance costs, travel expenses, facilities-related costs, which include depreciation costs and expenses for rent and maintenance of facilities, and other operating costs that are not specifically attributable to research activities. Patent Expenses The Company expenses all patent costs as incurred in connection with patent applications, including direct application fees, and the legal and consulting expenses related to making such applications, and such costs are included in G&A expenses in the consolidated statements of operations and comprehensive loss. Share-Based Compensation The Company accounts for share-based compensation under the provisions of ASC Topic 718, Compensation—Stock Compensation The Company recognizes share-based compensation expense on a straight-line basis based upon the grant date fair value. For awards whose vesting is based upon satisfaction of both a requisite service period and a performance criterion, the Company records share-based compensation expense on a straight-line basis until the earlier of the completion of the explicit service period or the achievement of the performance criteria. Performance criteria for awards subject to regulatory approval do not become probable of occurrence until the board of director’s reviews and approves the satisfaction of the performance criteria. The Company recognizes the effect of forfeitures in compensation cost in the period that the award was forfeited. See Note 11—Share-Based Compensation Income Taxes The Company uses the asset and liability method of accounting for income taxes. Under this method, deferred tax assets and liabilities are determined based on the difference between the financial reporting and the tax reporting basis of assets and liabilities and are measured using the enacted tax rates and laws that are expected to be in effect when the differences are expected to reverse. The Company provides a valuation allowance against net deferred tax assets unless, based upon the available evidence, it is more likely than not that the deferred tax assets will be realized. When the Company establishes or reduces the valuation allowance against its deferred tax assets, its provision for income taxes will increase or decrease, respectively, in the period such determination is made. The accounting guidance for uncertainty in income taxes prescribes a recognition threshold and measurement attribute criteria for the financial statement recognition and measurement of tax positions taken or expected to be taken in a tax return. For those benefits to be recognized, a tax position must be more likely than not to be sustained upon examination by taxing authorities based on the technical merits of the position. Interest and penalties, if any, related to unrecognized income tax positions are recognized in provision for income taxes, in the consolidated statements of operations and comprehensive loss. Net Loss Per Share Attributable to Ambrx Biopharma Inc Ordinary Shareholders Basic net loss per ordinary share is calculated by dividing the net loss attributable to ordinary Ambrx shareholders by the weighted-average number of ordinary shares outstanding during the period, without consideration for potentially dilutive securities. Diluted net loss per share is computed by dividing the net loss attributable to ordinary shareholders by the weighted-average number of ordinary shares and potentially dilutive securities outstanding for the period determined using the treasury-stock and if-converted Potentially dilutive securities excluded from the calculation of diluted net loss per share included options to purchase 39,116,174 and 34,200,976 ordinary shares for the years ended December 31, 2022 and 2021, respectively. Foreign Currency The functional currency of Ambrx HK, Ambrx US and Ambrx AU is the U.S. dollar. Through June 30, 2021, the functional currency for Ambrx Shanghai was the Chinese Renminbi. The financial statements of Ambrx Shanghai were translated into U.S. dollars using exchange rates in effect at each period-end The adjustment resulting from translating the financial statements of the Company’s then majority-owned subsidiary was reflected in accumulated other comprehensive loss in the Company’s consolidated balance sheets. Foreign currency transaction gains and losses are reported as other income (expense), net, in the consolidated statements of operations and comprehensive loss. Foreign currency transaction gains and losses during the years ended December 31, 2022 and 2021, were not material. Noncontrolling Interests Through March 31, 2021, revenues, expenses, gains, losses, net loss and other comprehensive loss were reported in the consolidated financial statements at the consolidated amounts, which included the amounts attributable to both the controlling and redeemable noncontrolling interests. Prior to March 2021, the Company’s noncontrolling interest was redeemable and classified outside of permanent equity because upon certain contingent events not being solely within the Company’s control it may be required to purchase the Company’s RNCI. In March 2021, upon execution of the Reorganization agreements, the Company’s noncontrollin |