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Summary of Significant Accounting Policies

12 Months Ended

Dec. 31, 2025

Summary of Significant Accounting Policies

Use of Estimates

The preparation of financial statements in conformity with accounting principles generally accepted in the United States (“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 periods.

Estimates and assumptions by management affect the Company’s revenue recognition, the net realizable value of inventory, valuations and purchase price allocations related to business combinations, contingent consideration obligations, assessments of intangible assets for impairment, intangible asset amortization methods and periods, tax reserves and recoverability of the Company’s net deferred tax assets and related valuation allowance.

Although the Company regularly assesses these estimates, actual results could differ materially from these estimates. Changes in estimates are recorded in the period in which they become known. The Company bases its estimates on historical experience and various other assumptions that it believes to be reasonable under the circumstances.

Basis of Presentation

The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All significant intercompany accounts and transactions have been eliminated in consolidation.

Foreign Currency

The Company translates the assets and liabilities of its foreign subsidiaries at rates in effect at the end of the reporting period. Revenues and expenses are translated at average rates in effect during the reporting period. Intercompany loans determined to be permanent are translated at each period end and included in accumulated other comprehensive income or loss on the consolidated balance sheets. Intercompany loans with foreign subsidiaries determined to be repayable are remeasured at each period end and included in other income or expense, net on the consolidated statements of comprehensive income (loss) or loss. Exchange gains or losses resulting from the revaluation between the transactional currency and the functional currency are included in other income or expense, net.

Revenue Recognition

The Company generates revenue from the sale of bioprocessing products, equipment devices, and related consumables used with these equipment devices to customers in the life sciences and biopharmaceutical industries. Under Accounting Standard Codification (“ASC”) 606, “Revenue from Contracts with Customers,” revenue is recognized when, or as, obligations under the terms of a contract are satisfied, which occurs when control of the promised products or services is transferred to customers. Revenue is measured as the amount of consideration the Company expects to receive in exchange for transferring products or services to a customer (“transaction price”). To the extent the transaction price includes variable consideration, such as rebates, the Company estimates the amount of variable consideration that should be included in the transaction price utilizing the expected value method or the most likely amount method, depending on the facts and circumstances relative to the contract. Variable consideration is included in the transaction price if, in the Company’s judgment, it is probable that a significant future reversal of cumulative revenue under the contract will not occur.

Estimates of variable consideration and determination of whether to include estimated amounts in the transaction price are based largely on an assessment of the Company’s anticipated performance and all information (historical, current and forecasted) that is reasonably available. Sales, value add, and other taxes collected on behalf of third parties are excluded from revenue.

When determining the transaction price of a contract, an adjustment is made if payment from a customer occurs either significantly before or significantly after performance, resulting in a significant financing component. The Company does not assess whether a significant financing component exists if the period between when the Company performs its obligations under the contract and when the customer pays is one year or less. None of the Company’s contracts contained a significant financing component as of December 31, 2025.

The Company recognizes product revenue under the terms of each customer agreement upon transfer of control to the customer, which occurs at a point in time. Shipping and handling fees are recorded as a component of product revenue, with the associated costs recorded as a component of cost of goods sold.

Risks and Uncertainties

The Company evaluates its operations periodically to determine if any risks and uncertainties exist that could impact its operations in the near term. The Company does not believe that there are any significant risks that have not already been disclosed in the consolidated financial statements. A loss of certain suppliers could temporarily disrupt operations, although alternate sources of supply exist for these items. The Company has mitigated these risks by working closely with key suppliers, identifying alternate sources and developing contingency plans.

Cash and Cash Equivalents

The Company considers all highly liquid investments with an original maturity of three months or less to be a cash equivalent. The Company’s cash equivalents consist primarily of money market mutual funds, including government and prime funds, are carried at cost, which approximates fair value.

Marketable Securities

The Company’s investments in marketable securities are classified as available-for-sale. Management determines the appropriate classification of securities at the time of purchase based upon management's intent with regards to such investment and reevaluates such designation as of each balance sheet date. The available-for-sale securities consist of U.S. treasury bills, which are recorded at fair value with unrealized gains and losses recorded as a component of accumulated other comprehensive income or loss in stockholders’ equity on the consolidated balance sheets.

To the extent the amortized cost basis exceeds the fair value, management assesses the security for impairment or credit loss. The Company's investment policy requires that it only invest in high-rated securities and limits its exposure to any single-user to mitigate the risk of credit loss.

Fair Value Measurement

The Company uses various valuation approaches in determining the fair value of its assets and liabilities. The Company employs a hierarchy for inputs used in measuring fair value that maximizes the use of observable inputs and minimizes the use of unobservable inputs by requiring that observable inputs be used when available. Observable inputs are inputs that market participants would use in pricing the asset or liability based on market data obtained from sources independent of the Company. Unobservable inputs are inputs that reflect the Company’s assumptions about the inputs that market participants would use in pricing the asset or liability and are developed based on the best information available in the circumstances. The fair value hierarchy is broken down into three levels based on the source of inputs as follows:


Level 1 –	Valuations based on unadjusted quoted prices in active markets for identical assets or liabilities that the Company has the ability to access.

Level 2 –	Valuations based on quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities.

Level 3 –	Valuations based on inputs that are unobservable and significant to the overall fair value measurement.

The availability of observable inputs can vary among the various types of financial assets and liabilities. To the extent that the valuation is based on models or inputs that are less observable or unobservable in the market, the determination of fair value requires more judgment. In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, for financial statement disclosure purposes, the level in the fair value hierarchy within which the fair value measurement is categorized is based on the lowest level input that is significant to the overall fair value measurement.

Convertible Instruments

The Company evaluates the embedded conversion feature within its convertible debt instruments under ASC 815, “Derivatives and Hedging.” The Company refers to ASC 815-15 and ASC 815-40 to determine if the conversion feature meets the definition of a derivative and, if so, whether to bifurcate the conversion feature and account for it as a separate derivative liability. Based on the Company’s analysis, the 1.00% Convertible Senior Notes due 2028 (the “2023 Notes”) do not have an embedded conversion feature requiring bifurcation under ASC 815-15 and thus are accounted for as a single unit of account, a liability under ASC 470, “Debt.” For further detail on the 2023 Notes, see Note 13, “Convertible Senior Notes.”

Inventories

Inventories relate to the Company’s bioprocessing business. The Company values inventory at cost or, if lower, net realizable value, using the first-in, first-out method. The Company reviews its inventory at least quarterly and records a provision for excess and obsolete inventory based primarily on historical consumption patterns, its estimates of expected future sales volume and expiration dates of raw materials, work-in-process and finished products. The Company writes down inventory that has become obsolete, inventory that has a cost basis in excess of its expected net realizable value, and inventory in excess of expected requirements to cost of goods sold. Manufacturing of bioprocessing finished goods is done to order and tested for quality specifications prior to shipment.

A change in the estimated timing or amount of demand for the Company’s products could result in additional provisions for excess inventory quantities on hand. In addition, unexpected quality failures could have a significant impact on the value of inventory and reported operating results. Work-in-process and finished products inventories consist of material, labor, outside processing costs and manufacturing overhead.

Lease Accounting

In accordance with ASC 842, the Company determines whether an arrangement contains a lease at inception. If a lease is identified in an arrangement, the Company recognizes a right-of-use asset and liability on its consolidated balance sheets and determines whether the lease should be classified as a finance or operating lease. Finance leases are immaterial to the Company’s consolidated financial statements. The Company does not recognize assets or liabilities for leases with lease terms of less than 12 months.

Right of use lease assets and liabilities are recognized at the lease commencement date based on the present value of the lease payments over the lease term using the discount rate implicit in the lease. If the rate implicit is not readily determinable, the Company utilizes its incremental borrowing rate at the lease commencement date. Operating lease assets are further adjusted for prepaid or accrued lease payments. Operating lease payments are expensed using the straight-line method as an operating expense over the lease term.

The Company does not separate lease and non-lease components when determining which lease payments to include in the calculation of its lease assets and liabilities. Variable lease payments are expensed as incurred. If a lease includes an option to extend or terminate the lease, the Company reflects the option in the lease term if it is reasonably certain it will exercise the option.

Certain of the Company’s operating leases where the Company is the lessee provide for minimum annual payments that increase over the life of the lease. Some of these leases include obligations to pay for other services, such as operations and maintenance. For leases of property, the Company accounts for these other services as a component of the lease. The aggregate minimum annual payments are expensed on the straight-line basis beginning when the Company takes possession of the property and extending over the term of the related lease, including renewal options when the exercise of the option is reasonably certain as an economic penalty may be incurred if the option is not exercised.

Income Taxes

Deferred taxes are determined based on the difference between the consolidated financial statements and tax basis of assets and liabilities using enacted tax rates in effect in the years in which the differences are expected to reverse. Valuation allowances are provided, if, based upon the weight of available evidence, it is more likely than not that some or all of the deferred tax assets will not be realized. The Company accounts for uncertain tax positions using a “more-likely-than-not” threshold for recognizing and resolving uncertain tax positions. The evaluation of uncertain tax positions is based on factors including, but not limited to, changes in tax law, the measurement of tax positions taken or expected to be taken in tax returns, the effective settlement of matters subject to audit, new audit activity and changes in facts or circumstances related to a tax position. The Company evaluates this tax position on a quarterly basis. The Company also accrues for potential interest and penalties related to unrecognized tax benefits in income tax expense. The Company is required to provide for tax on Global Intangible Low-Taxed Income (“GILTI”) earned by certain foreign subsidiaries. The Company has adopted an accounting policy to provide for the tax expense related to GILTI in the year the tax is incurred as a period expense.

Property, Plant & Equipment

Property, plant & equipment is recorded at cost less allowances for depreciation. Depreciation is calculated using the straight-line method over the estimated useful life of the asset as follows:


Classification		Estimated Useful Life
Buildings		Thirty years
Leasehold improvements		Shorter of the term of the lease or estimated useful life
Equipment		Three to twelve years
Furniture, fixtures and office equipment		Three to eight years
Computer hardware and software		Three to seven years or estimated useful life
Vehicles		Five years

Upon disposal of property, plant & equipment, the cost of the asset and the accumulated depreciation are removed from the accounts and the resulting gain or loss is reflected in the consolidated statements of comprehensive income or loss. Fully depreciated assets are not removed from the accounts until they are physically disposed of.

Certain systems development costs related to the purchase, development and installation of computer software developed or obtained for internal use are capitalized and depreciated over the estimated useful life of the related project. Costs incurred prior to the development stage, as well as maintenance, training costs, and general and administrative expenses are expensed as incurred.

Earnings (Loss) Per Share

The Company reports earnings or loss per share in accordance with ASC 260, “Earnings Per Share,” which establishes standards for computing and presenting earnings or loss per share. Basic earnings or loss per share is computed by dividing net income or loss available to common shareholders by the weighted average number of common shares outstanding during the period. Diluted earnings or loss per share is computed by dividing net income or loss available to common shareholders by the weighted-average number of common shares and dilutive common share equivalents outstanding during the period. Potential common share equivalents consist of restricted stock awards (including performance stock units) and the incremental common shares issuable upon the exercise of stock options, stock issuable upon conversion of convertible debt securities and certain contingent consideration earnouts. The dilutive effects of restricted stock awards and stock options are reflected in diluted earnings or loss per share by application of the treasury stock method. The dilutive effect of shares issuable upon conversion of the convertible debt securities are included in the calculation of diluted earnings or loss per share under the if-converted method, while contingent consideration is considered dilutive when the conditions for issuance are met at the end of the reporting period.

In periods where the Company is in a net loss position, diluted loss per share is the same as basic loss per share, as the effects of common stock equivalents outstanding, shares issuable upon conversion of convertible debt securities and shares issuable from certain contingent consideration earnouts, are antidilutive and therefore excluded from the calculation of diluted loss per share.

A reconciliation of basic and diluted weighted average share outstanding is as follows:


	Year Ended December 31,
	2025		2024			2023
	(Amounts in thousands, except per share data)
Numerator:
Net income (loss)	$	48,894	$	(25,514	)	$	35,596

Denominator:
Weighted average shares used in computing net income (loss) per share – basic		56,234		55,937			55,720
Effect of dilutive shares:
Options and stock units		314		—			457
Performance stock units		13		—			11
Convertible senior notes		—		—			181
Contingent consideration		—		—			8
Dilutive potential common shares		327		—			657
Denominator for diluted earnings (loss) per share - adjusted weighted average shares used in computing earnings (loss) per share - diluted		56,561		55,937			56,377

Earnings (loss) per share:
Basic	$	0.87	$	(0.46	)	$	0.64
Diluted	$	0.86	$	(0.46	)	$	0.63

The Company has excluded the following potential common shares from the computation of diluted earnings or loss per share, as the inclusion would be anti-dilutive:


	Year Ended December 31,
	2025		2024		2023
	(Amounts in thousands)
Options and stock units (1)		449,732		422,130		306,849
Total		449,732		422,130		306,849

(1) Inclusive of performance stock units.

Potentially dilutive shares from the Company’s 2023 Notes were excluded from the calculation of diluted earnings (loss) per share during the years ended December 31, 2025 and 2024, as the inclusion would be anti-dilutive.

Segment Reporting

The Company operates under one reportable segment. The Company’s chief operating decision maker (“CODM”), is the Chief Executive Officer (“CEO”). The Company views its operations, makes decisions regarding how to allocate resources and manages its business as one reportable segment and one reporting unit. The CODM reviews financial information presented on a consolidated basis for purposes of allocating resources and assessing financial performance. Net income or net loss as reported on the consolidated statement of comprehensive income or loss is the measure of segment profit or loss used by the CODM in allocating resources and assessing performance.

The following table presents the Company’s significant segment expenses which are regularly provided to the CODM for the one reportable segment:


	Year Ended December 31,
	2025		2024			2023
	(Amounts in thousands)
Total revenue	$	738,256	$	634,439		$	632,362
Costs and operating expenses:
Cost of goods sold		352,011		359,794			353,922
Research and development		54,177		43,200			42,722
Sales and marketing		105,320		92,009			78,483
General and administrative		171,581		174,550			109,532
Total costs and operating expenses		683,089		669,553			584,659
Other income, net		7,216		8,079			9,004
Income tax provision (benefit)		13,489		(1,521	)		21,111
Net income (loss)	$	48,894	$	(25,514	)	$	35,596

The following table represents product revenues by product line:


	Year Ended December 31,
	2025		2024		2023
	(Amounts in thousands)
Filtration products	$	402,792	$	372,963	$	341,379
Chromatography products		153,176		122,810		126,629
Process analytics products		81,237		59,301		56,820
Proteins products		97,435		74,425		103,463
Other		3,320		4,679		3,688
Total product revenue	$	737,960	$	634,178	$	631,979

The following table represents the Company’s total revenue by geographic area, based on the location of the customer:


	Year Ended December 31,
	2025			2024			2023
Revenue by customers' geographic locations:
North America		49	%		50	%		44	%
Europe		34	%		34	%		36	%
Asia Pacific ("APAC") & Rest of World (1)		17	%		16	%		20	%
Total revenue		100	%		100	%		100	%

(1) Rest of the world consists of countries in Central and South America and Africa.

During the years ended December 31, 2025, 2024 and 2023, no single country other than the United States accounted for more than 10% of total revenues.

The following table represents the Company’s total assets for the periods presented:


	December 31,
	2025		2024
	(Amounts in thousands)
Total assets by geographic locations:
North America	$	2,340,178	$	2,305,538
Europe		489,927		410,284
APAC		119,594		113,844
Total assets by geographic location	$	2,949,699	$	2,829,666

The following table represents the Company’s long-lived assets for the periods presented:


	December 31,
	2025		2024
	(Amounts in thousands)
Long-lived assets by geographic location
North America	$	257,408	$	284,868
Europe		47,393		45,650
APAC		6,264		3,466
Total assets by geographic location	$	311,065	$	333,984

Long-lived assets consist of property, plant and equipment, net, operating lease right of use assets and other noncurrent assets. As of December 31, 2025 and 2024, no single country other than the United States accounted for more than 10% of total assets or total long-lived assets.

Concentrations of Credit Risk and Significant Customers

Financial instruments that subject the Company to significant concentrations of credit risk primarily consist of cash and cash equivalents, marketable securities and accounts receivable. The Company's investment policy requires that it only invest in highly-rated securities and limits its exposure to any single-issuer to mitigate the risk of credit loss.

The Company’s expected loss allowance methodology for accounts receivable is developed using historical collection experience, current and future economic and market conditions and a review of the current status of customers' trade accounts receivable. The Company’s expected loss allowance and changes in the allowance period over period have not been historically material. Concentration of credit risk with respect to accounts receivable is limited to customers to whom the Company makes significant sales. To control credit risk, the Company performs regular credit evaluations of its customers’ financial condition.

There was no revenue from a specific customer that represented 10% or more of the Company's total revenue for the years ended December 31, 2025, 2024 or 2023. No accounts receivable balance from a specific customer represented 10% or more of the Company's total trade accounts receivable at December 31, 2025 and 2024.

Business Combinations, Goodwill and Intangible Assets

Business Combinations

Total consideration transferred for acquisitions is allocated to the tangible and intangible assets acquired and liabilities assumed, if any, based on their fair values at the dates of acquisition. This purchase price allocation process requires management to make significant estimates and assumptions with respect to intangible assets. The fair value of identifiable intangible assets is based on detailed valuations that use information and assumptions determined by management. Any excess of purchase price over the fair value of the net tangible and intangible assets acquired is allocated to goodwill. While the Company uses its best estimates and assumptions to value assets acquired and liabilities assumed at the acquisition date as well as any contingent consideration, where applicable, the Company’s estimates are inherently uncertain and subject to refinement. As a result, during the measurement period, which may be up to one year from the acquisition date, the Company records adjustments to the assets acquired and liabilities assumed with the corresponding offset to goodwill. Upon conclusion of the measurement period or final determination of the values of assets acquired or liabilities assumed, whichever comes first, any subsequent adjustments are recorded to the Company’s consolidated statements of comprehensive income or loss.

The fair value of contingent consideration includes estimates and judgments made by management regarding the probability that future contingent payments will be made. Management updates these estimates and the related fair value of contingent consideration at each reporting period. These changes in the fair value of contingent consideration are recorded to contingent consideration in the Company’s condensed consolidated statements of comprehensive income or loss.

The Company typically uses the income approach to determine the fair value of certain identifiable intangible assets including customer relationships and developed technology. This approach determines fair value by estimating after-tax cash flows attributable to these assets over their respective useful lives and then discounting these after-tax cash flows back to a present value. The Company bases its assumptions on estimates of future cash flows, expected growth rates, expected trends in technology, etc.

Discount rates used to arrive at a present value as of the date of acquisition are based on the time value of money and certain industry-specific risk factors. The Company believes the estimated purchased customer relationships, developed technologies, trademark/tradename and other intangible assets identified in its acquisitions represent the fair value at the date of acquisition, and do not exceed the amount a third-party would pay for such assets.

Goodwill

Goodwill is not amortized and is tested for impairment at least annually at the reporting unit level. The Company operates as one reporting unit as of the goodwill impairment measurement date of October 1, 2025. The qualitative assessment of the Company’s one reporting unit indicated there were no indications of impairment and it was not more likely than not that its fair value was less than its carrying amount. If an event occurs or circumstances change that would more likely than not reduce the fair value of its reporting unit below its carrying value, the Company will evaluate its goodwill for impairment between annual tests. There was no impairment to goodwill and therefore no impairment charge recorded for the periods presented.

Intangible Assets

Intangible assets with a definite life are amortized over their useful lives using the straight-line method and the amortization expense is recorded within cost of goods sold, research and development (“R&D”) and selling, general and administrative expense in the consolidated statements of comprehensive income or loss. Intangible assets and their related useful lives are reviewed at least annually to determine if any adverse conditions existed that would indicate the carrying value of these assets may not be recoverable. More frequent impairment assessments are conducted if certain conditions exist, including a change in the competitive landscape, any internal decisions to pursue new or different technology strategies, a loss of a significant customer, or a significant change in the marketplace, including changes in the prices paid for the Company’s products or changes in the size of the market for the Company’s products. If impairment indicators are present, the Company determines whether the underlying intangible asset is recoverable through estimated future undiscounted cash flows. If the asset is not found to be recoverable, it is written down to the estimated fair value of the asset based on the sum of the future discounted cash flows expected to result from the use and disposition of the asset. If the estimate of an intangible asset’s remaining useful life is changed, the remaining carrying amount of the intangible asset is amortized prospectively over the revised remaining useful life. The Company continues to believe that its definite-lived intangible assets are recoverable at December 31, 2025.

Indefinite-lived intangible assets are reviewed for impairment at least annually. There has been no impairment of our intangible assets for the periods presented.

Stock Based Compensation

The Company measures stock-based compensation cost at the grant date based on the estimated fair value of the award and recognizes it as an expense over the employee’s requisite service period on a straight-line basis. The Company uses the Black-Scholes option pricing model to calculate the fair value of share-based option awards on the grant date and the closing price of the Company’s common stock on the date of grant for share units.

The amount of stock-based compensation expense recognized during a period is based on the portion of the awards that are expected to vest. Forfeitures are estimated at the time of grant and revised, if necessary, in subsequent periods if actual forfeitures differ from those estimates.

The Company recognizes expense on performance-based awards over the vesting period based on the probability that the internal performance metrics will be achieved. Management evaluates whether the achievement of a performance-based metrics are probable as of the reporting date.

Recent Accounting Standards Updates

We consider the applicability and impact of all Accounting Standards Updates (“ASU”) issued by the Financial Accounting Standards Board (“FASB”) and other accounting guidance on the Company’s consolidated financial statements. Updates not listed below were assessed and determined to be either not applicable or are expected to have minimal impact on the Company’s consolidated financial position or results of operations.

Recently Issued Accounting Guidance – Adopted During the Fiscal Year

In December 2023, the FASB issued ASU 2023-09, “Income Taxes (Topic 740) - Improvements to Income Tax Disclosures” to enhance the transparency and decision usefulness of income tax disclosures by requiring consistent categories and greater disaggregation of information in the rate reconciliation and income taxes paid disaggregated by jurisdiction. The Company adopted

ASU 2023-09 effective January 1, 2025 on a prospective basis. The adoption of this guidance did not have a material impact on the Company’s consolidated financial statements and disclosures. Refer to Note 10, “Income Taxes”, for further detail.

Recently Issued Accounting Guidance – Not Yet Adopted

In November 2024, the FASB issued ASU 2024-03, “Income Statement - Reporting Comprehensive Income - Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses”, which requires disclosure of specific expense categories in the notes to the financial statements. This includes: (i) amounts of purchased inventory, employee compensation, depreciation, amortization and other related costs and expenses; (ii) an explanation of costs and expenses that are not disaggregated on a quantitative basis; and (iii) the definition and total amount of selling expenses. The amendment is effective for annual reporting periods beginning after December 15, 2026, with early adoption permitted, and interim reporting periods beginning after December 15, 2027. The amendment should be applied prospectively to financial reporting periods after the effective date or retrospectively to any or all prior periods presented in the financial statements. The Company is currently evaluating the impact that the adoption of this standard will have on its consolidated financial statements and related disclosures.