EXAGEN INC.

Previous wording

You should read the following discussion of our financial condition and results of operations in conjunction with the financial statements and the notes thereto included elsewhere in this Annual Report. Some of the information contained in this discussion and analysis or set forth elsewhere in this Annual Report, including information with respect to our plans and strategy for our business and financial performance, includes forward-looking statements that are based on current beliefs, plans and expectations and involve risks, uncertainties and assumptions. You should read the "Special note regarding forward-looking statements" and "Risk Factors" section of this Annual Report for a discussion of important factors that could cause our actual results to differ materially from the results described in or implied by the forward-looking statements contained in the following discussion and analysis.

Current wording

You should read the following discussion of our financial condition and results of operations in conjunction with the financial statements and the notes thereto included elsewhere in this Annual Report. Some of the information contained in this discussion and analysis or set forth elsewhere in this Annual Report, including information with respect to our plans and strategy for our business and financial performance, includes forward-looking statements that are based on current beliefs, plans and expectations and involve risks, uncertainties and assumptions. You should read the "Cautionary Statement Regarding Forward-Looking Statements" and "Risk Factors" section of this Annual Report for a discussion of important factors that could cause our actual results to differ materially from the results described in or implied by the forward-looking statements contained in the following discussion and analysis.

Previous wording

Our tests are used in a variety of clinical settings to provide clarity in autoimmune disease decision-making with the goal of improving patients' clinical outcomes. We commercially launched our flagship testing product, AVISE® CTD, in 2012. AVISE® CTD enables differential diagnosis for patients presenting with symptoms indicative of a wide variety of CDTs and other related diseases with overlapping symptoms. Traditional screening methods often lack accuracy, resulting in repeat testing and delayed diagnosis. With significant increases in autoimmune incidence in recent years, AVISE® CTD provides unique biomarkers that empower clinicians to confidently and quickly diagnose various CTDs. Beginning in late 2022, we revitalized our organization with the addition of key members to our senior leadership team, including our Chief Executive Officer, Chief Financial Officer, Vice President of Sales, Chief Medical Officer, and Medical and Laboratory Director. By leveraging our team’s extensive experience to create clinically distinct solutions that improve patient lives, wehave created a strong foundation for growth andbelieve that we are well-positionedto positively impact patient care and address unmet clinical needs in autoimmune disease. We strive to become a partner of choice for doctors, hospitals, healthcare systems, and payors.

Current wording

Our tests are used in a variety of clinical settings to provide clarity in autoimmune disease decision-making with the goal of improving patients' clinical outcomes. We commercially launched our flagship testing product, AVISE® CTD, in 2012. AVISE® CTD enables differential diagnosis for patients presenting with symptoms indicative of a wide variety of CDTs and other related diseases with overlapping symptoms. Traditional screening methods often lack accuracy, resulting in repeat testing and delayed diagnosis. With significant increases in autoimmune incidence in recent years, AVISE® CTD provides unique biomarkers that empower clinicians to confidently and quickly diagnose various CTDs.

Previous wording

Under the leadership of our Chief Executive Officer, John Aballi, who joined Exagen in October 2022, we are executing an operational turnaround of the business, resulting in a return to revenue growth and gross margin expansion while significantly reducing operating expenses and cash burn.

Current wording

Under the leadership of our Chief Executive Officer, John Aballi, who joined Exagen in October 2022, we have executed an operational turnaround of the business, resulting in a return to revenue growth and gross margin expansion while significantly reducing operating expenses and cash burn.

Previous wording

Since launching AVISE® CTD, we have produced an extensive body of peer-reviewed literature supporting the test’s clinical validity and utility, demonstrating the importance of AVISE® CTD in patient care. Revenue from this product comprised 91% and 88% of our revenue for the years ended December 31, 2024 and 2023, respectively.

Current wording

Since launching AVISE® CTD, we have produced an extensive body of peer-reviewed literature supporting the test’s clinical validity and utility, demonstrating the importance of AVISE® CTD in patient care. Revenue from this product comprised 91% of our revenue for each of the years ended December 31, 2025 and 2024.

Previous wording

We market our AVISE® testing products using our specialized sales force covering 40 territories in the United States. Many diagnostic sales forces are trained only to understand the comparative benefits of the tests they promote. In contrast, the specialized backgrounds of our sales personnel, coupled with our comprehensive training, enables our sales representatives to interpret results from our de-identified patient test reports and provide unique insights in a highly tailored discussion with rheumatologists. We believe our focus on and experience in the field of rheumatology, combined with our commitment to excellent customer service and support, position us very well to respond to the needs of rheumatologists and the patients they serve.

Current wording

We market our AVISE® testing products using our specialized sales force covering 45 territories in the United States. Many diagnostic sales forces are trained only to understand the comparative benefits of the tests they promote. In contrast, the specialized backgrounds of our sales personnel, coupled with our comprehensive training, enables our sales representatives to interpret results from our de-identified patient test reports and provide unique insights in a highly tailored discussion with rheumatologists. We believe our focus on and experience in the field of rheumatology, combined with our commitment to excellent customer service and support, position us very well to respond to the needs of rheumatologists and the patients they serve.

Previous wording

▪Commercial Launch of AVISE® CTD Enhancements. Our flagship product, AVISE® CTD, enables clinicians to more effectively diagnose complex autoimmune conditions such as lupus, rheumatoid arthritis, and Sjögren’s syndrome earlier and with greater accuracy, as compared to the current standard of care. Our laboratory specializes in the testing of rheumatic diseases, delivering precise and timely results, supported by a full suite of AVISE®-branded tests for disease diagnosis, prognosis, and monitoring. With a focus on research, innovation, education, and patient-centered care, we are dedicated to addressing the ongoing challenges of autoimmune disease management.

Current wording

▪Commercial Launch of AVISE® CTD Enhancements. Our flagship product, AVISE® CTD, enables clinicians to more effectively diagnose complex autoimmune conditions such as SLE, RA, and Sjögren’s syndrome earlier and with greater accuracy, in each case, as compared to the current standard of care. Our laboratory specializes in the testing of rheumatic diseases, delivering precise and timely results, supported by a full suite of AVISE®-branded tests for disease diagnosis, prognosis, and monitoring. With a focus on research, innovation, education, and patient-centered care, we are dedicated to addressing the ongoing challenges of autoimmune disease management.

Previous wording

In January 2025, we announced conditional approval by NYSDOH and commercial launch of our new SLE and RA biomarker assays on the AVISE® CTD platform. Collectively, we believe these new biomarkers will further improve the clinical utility of AVISE® CTD, providing clinicians with the information they need to definitively diagnose patients and shorten their autoimmune diagnostic journeys. We expect the addition of these new biomarkers will drive gains in our AVISE® CTD average selling price, gross margin expansion and increase demand while positioning us for profitability.

Current wording

In January 2025, we announced conditional approval by NYSDOH and commercial launch of our new SLE and RA biomarker assays on the AVISE® CTD platform. Collectively, we believe these new biomarkers will further improve the clinical utility of AVISE® CTD, providing clinicians with the information they need to definitively diagnose patients and shorten their autoimmune diagnostic journeys. We expect the addition of these new biomarkers will continue to drive gains in our AVISE® CTD average selling price, gross margin expansion and increase demand while positioning us for profitability.

Previous wording

▪Reimbursement for Our Testing Products. Our revenue depends on achieving broad coverage and reimbursement for our tests from third-party payors, including both commercial payors and government payors. Payment from third-party payors differs depending on whether we are considered a "participating provider" (have entered into a contract with the payors as a participating provider) or a "non-participating provider" (do not have a contract and are considered a "non-participating provider"). Payors will often reimburse non-participating providers at a lower amount than participating providers, if at all. We have received a substantial portion of our revenue from a limited number of commercial payors, most of which have not contracted with us to be a participating provider. Historically, we have experienced situations where commercial payors proactively reduced the amounts they were willing to reimburse for our tests, and in other situations, commercial payors have determined that the amounts they previously paid were too high and have sought to recover those perceived excess payments by deducting such amounts from payments otherwise being made. When we contract to serve as a participating provider, reimbursements are made pursuant to a negotiated fee schedule and are limited to only covered indications. If we are not able to obtain or maintain coverage and adequate reimbursement from third-party payors, we may not be able to effectively increase our testing volume and revenue as expected. Additionally, changes in our estimated reimbursements for tests performed in prior periods can positively or negatively impact our revenue in the current period and cause our financial results to fluctuate. In addition, in connection with our revenue cycle management initiatives, we held claims in the first half of the year which resulted in increases in our accounts receivable and an accelerated decrease in our cash in the first half of the year. As expected, this trend reversed in the second half of the year, as cash was collected on billed tests.

Current wording

▪Reimbursement for Our Testing Products. Our revenue depends on achieving broad coverage and reimbursement for our tests from third-party payors, including both commercial payors and government payors. Payment from third-party payors differs depending on whether we are considered a "participating provider" (have entered into a contract with the payors as a participating provider) or a "non-participating provider" (do not have a contract and are considered a "non-participating provider"). Payors will often reimburse non-participating providers at a lower amount than participating providers, if at all. We have received a substantial portion of our revenue from a limited number of commercial payors, most of which have not contracted with us to be a participating provider. Historically, we have experienced situations where commercial payors proactively reduced the amounts they were willing to reimburse for our tests, and in other situations, commercial payors have determined that the amounts they previously paid were too high and have sought to recover those perceived excess payments by deducting such amounts from payments otherwise being made. When we contract to serve as a participating provider, reimbursements are made pursuant to a negotiated fee schedule and are limited to only covered indications. If we are not able to obtain or maintain coverage and adequate reimbursement from third-party payors, we may not be able to effectively increase our testing volume and revenue as expected. Additionally, changes in our estimated reimbursements for tests performed in prior periods can positively or negatively impact our revenue in the current period and cause our financial results to fluctuate. In addition, in connection with our revenue cycle management initiatives, we have in the past and continue to hold claims in the first half of the fiscal year, which typically results in increases in our accounts receivable and an accelerated decrease in our cash in the same period, with the trend subsequently reversed in the second half of the fiscal year as cash is collected on billed tests.

Previous wording

▪Expanding Adoption of AVISE® CTD. Since the launch of AVISE® CTD in 2012 and through December 31, 2024, we have delivered approximately 1,009,812 of these tests. 122,883 AVISE® CTD tests were delivered in the year ended December 31, 2024, representing approximately 11% decline over the same period in 2023. The number of ordering healthcare providers in the quarter ended December 31, 2024 was 2,370, representing an approximate 1% decrease over the same period in 2023. Revenue growth for our testing products will depend, in part, on our ability to continue to expand our base of ordering healthcare providers and increase our penetration with existing healthcare providers.

Current wording

▪Expanding Adoption of AVISE® CTD. Since the launch of AVISE® CTD in 2012 and through December 31, 2025, we have delivered over one million of these tests. During the year ended December 31, 2025, the number of AVISE® CTD tests delivered increased by approximately 11% over the same period in 2024. Revenue growth for our testing products will depend, in part, on our ability to continue to expand our base of ordering healthcare providers and increase our penetration with existing healthcare providers and on the success of the T-Cell Biomarkers and RA Sub-Profile Biomarkers, which we added to our AVISE® CTD tests in January 2025.

Previous wording

▪Deliver Sustainable Profitable Growth. We seek to establish a solid foundation for growth and path to sustained profitability through continued gross margin enhancements and improved operating expense efficiencies through the implementation of certain internal initiatives, such as leveraging validation, utility and reimbursement-oriented clinical studies to facilitate payor coverage of our testing products. We center our efforts around long-term reimbursement and ASP growth. This strategy includes optimizing revenue cycle practices, focusing managed care efforts on medical policy expansion and continuing to educate insurance payors on the published, real-world evidence of the clinical utility of our testing products, demonstrating healthcare cost savings and reductions in time to diagnosis.

Current wording

▪Deliver Sustainable Profitable Growth. We seek to establish a solid foundation for growth and a path to sustained profitability through continued gross margin enhancements and improved operating expense efficiencies through the implementation of certain internal initiatives, such as leveraging validation, utility and reimbursement-oriented clinical studies to facilitate payor coverage of our testing products. We center our efforts around long-term reimbursement and ASP growth. This strategy includes optimizing revenue cycle practices, focusing managed care efforts on medical policy expansion and continuing to educate insurance payors on the published, real-world evidence of the clinical utility of our testing products, demonstrating healthcare cost savings and reductions in time to diagnosis.

Previous wording

While each of these areas present significant opportunities for us, they also pose significant risks and challenges that we must address. We discuss many of these risks, uncertainties and other factors in the section entitled "Risk Factors."

Current wording

While each of these areas present significant opportunities for us, they also pose significant risks and challenges that we must address. We discuss many of these risks, uncertainties and other factors that may affect our performance in the section entitled "Risk Factors."

Previous wording

To date, we have derived nearly all of our revenue from the sale of our testing products, most of which is attributable to our AVISE® CTD test. Revenue from the sale of our AVISE® CTD test comprised 91% and 88% of our revenue for the years ended December 31, 2024 and 2023, respectively. We primarily market our testing products to rheumatologists and their physician assistants in the United States. The healthcare professionals who order our testing products, and to whom results are reported, are generally not responsible for payment for these products. The parties that pay for these services (payors) consist of commercial payors (insurance companies, health maintenance organizations, etc.), government payors (primarily Medicare and Medicaid), client payors (hospitals, other laboratories, etc.), and patient self-pay. Our service is completed upon the delivery of test results to the prescribing rheumatologists which triggers billing for the service.

Current wording

To date, we have derived nearly all of our revenue from the sale of our testing products, most of which is attributable to our AVISE® CTD test. We primarily market our testing products to rheumatologists and their physician assistants in the United States. The healthcare professionals who order our testing products, and to whom results are reported, are generally not responsible for payment for these products. The parties that pay for these services (payors) consist of commercial payors (insurance companies, health maintenance organizations, etc.), government payors (primarily Medicare and Medicaid), client payors (hospitals, other laboratories, etc.), and patient self-pay. Our service is completed upon the delivery of test results to the prescribing rheumatologists which triggers billing for the service.

Previous wording

Our ability to increase our revenue will depend on the success of the commercial launch of the T-Cell Biomarker and RA Sub-Profile Biomarkers enhancements to our AVISE® CTD test, in addition to our ability to further penetrate the market for our current and future testing products and increase our ASP for tests delivered.

Current wording

Our ability to increase our revenue may depend, in part, on the success of the T-Cell Biomarker and RA and PAD4 Sub-Profile Biomarkers enhancements to our AVISE® CTD test, in addition to our ability to further penetrate the market for our current and future testing products and increase our reimbursement and collection rates (ASP) for tests delivered.

Previous wording

In April 2022, we were granted a PLA code for our protein-based test, AVISE® Lupus, which is offered standalone or as part of our AVISE® CTD test. Noridian, our MAC, has set the current pricing for this PLA code at $840.65 per test through December 31, 2025. The process for obtaining and maintaining consistent reimbursement for new tests can be uncertain, lengthy and time consuming. A pricing determination is not synonymous with a coverage determination. Having a price associated with the PLA code for any particular test does not secure coverage or reimbursement for that PLA code from Medicare or any other third-party payor.

Current wording

In April 2022, we were granted a PLA code for our protein-based test, AVISE® Lupus, which is offered standalone or as part of our AVISE® CTD test. Noridian, our MAC, has set the current pricing for this PLA code at $840.65 per test. CMS will align local MAC pricing with national payment rates for the PLA code on the 2026 CLFS through their annual payment determination process to provide a standardized, nationally determined payment rate. The process for obtaining and maintaining consistent reimbursement for new tests can be uncertain, lengthy and time consuming. A pricing determination is not synonymous with a coverage determination. Having a price associated with the PLA code for any particular test does not secure coverage or reimbursement for that PLA code from Medicare or any other third-party payor.

Previous wording

We submitted a formal request to Noridian for coverage of our AVISE® Lupus test under the new PLA Code and on September 27, 2022, we received notice that Noridian deemed our application for an LCD to be valid, but our application is still pending. Ultimately receiving a favorable LCD is uncertain and may be time-consuming, resource intensive and require multiple quarterly or annual periods to complete and is subject to risks and uncertainties described in the section entitled"Risk Factors" in this Annual Report. In the meantime, we have continued to submit Medicare claims for AVISE® Lupus, appeal denials and respond to requests for additional information. On January 31, 2024, CMS released a coverage article under which all multi-analyte proteomic testing will be considered within the scope of MolDX and reviewed through their technology assessment process. The article listed several such tests, including the AVISE® Lupus test, and requires all laboratories furnishing multi-analyte proteomics testing in MolDX jurisdictions to register with the DEX® Diagnostics Exchange Registry and obtain a Z-Code® identifier. We were issued a Z-Code® identifier in May 2024. To determine if the submitted tests are compliant with relevant policy requirements, these tests will undergo technical assessment by Palmetto GBA as part of the MolDX program.

Current wording

In the meantime, we have continued to submit Medicare claims for AVISE® Lupus, appeal denials and respond to requests for additional information. On January 31, 2024, CMS released a coverage article under which all multi-analyte proteomic testing will be considered within the scope of MolDX and reviewed through their technology assessment process. The article listed several such tests, including the AVISE® Lupus test, and requires all laboratories furnishing multi-analyte proteomics testing in MolDX jurisdictions to register with the DEX® Diagnostics Exchange Registry and obtain a Z-Code® identifier. We were issued a Z-Code® identifier in May 2024. To determine if the submitted tests are compliant with relevant policy requirements, these tests will undergo technical assessment by Palmetto GBA as part of the MolDX program. That technical assessment is on hold until such time as an LCD is issued by CMS. In the interim, we expect our current status with CMS to remain unchanged.

Previous wording

During the year ended December 31, 2023, we implemented several revenue cycle management initiatives, including among others, withholding the submission of commercial payor claims for reimbursement until subsequent quarters, increasing appeals efforts, adjusting the documentation required of physicians when ordering our tests and implementing increases to our patient payment rates. Additionally, in November 2023, we increased the list price billed for our tests. These ongoing revenue cycle management initiatives aim to optimize our appeals process and the potential for cash collections. We've experienced moderate declines in test volume since the second half of 2023, as rheumatologists and patients adjust to these changes. We delivered 122,883 tests for our flagship product, AVISE® CTD, in the year ended December 31, 2024 as compared to 137,650 tests for the year ended December 31, 2023 resulting from the expected impacts of revenue cycle management initiatives and the reduction of sales territories which began in 2022.

Current wording

During the year ended December 31, 2023, we implemented several revenue cycle management initiatives, including among others, withholding the submission of commercial payor claims for reimbursement until subsequent quarters, increasing appeals efforts, adjusting the documentation required of physicians when ordering our tests and implementing increases to our patient payment rates. Additionally, in November 2023, we increased the list price billed for our tests. These ongoing revenue cycle management initiatives aim to optimize our appeals process and the potential for cash collections. During the fiscal year ended December 31, 2024, we experienced moderate declines in test volume since the second half of the fiscal year ended December 31, 2023, as rheumatologists and patients adjusted to these changes. During the fiscal year ended December 31, 2025, we saw a return to volume growth. The number of AVISE® CTD tests delivered during the year ended December 31, 2025 improved by approximately 11% as compared to the number of AVISE® CTD tests delivered during the year ended December 31, 2024 due to continuing physician demand and adoption, early traction from our new biomarkers, and salesforce expansion. Additionally, the trailing-twelve-month ASP of our AVISE® CTD tests increased by approximately 7% during the year ended December 31, 2025 compared to the same period in 2024.

Previous wording

Costs of revenue represents the expenses associated with obtaining and testing patient specimens. The components of our costs of revenue include materials costs, direct labor, equipment, infrastructure expenses, shipping charges to transport specimens, blood specimen collections fees, royalties, depreciation and allocated overhead (including rent and utilities).

Current wording

Cost of revenue represents the expenses associated with obtaining and testing patient specimens. The components of our cost of revenue include materials costs, direct labor, equipment, infrastructure expenses, shipping charges to transport specimens, blood specimen collections fees, royalties, depreciation and allocated overhead (including rent and utilities).

Previous wording

Each payor, whether commercial, government, or individual, reimburses us at different amounts. These differences can be significant. As a result, our costs of revenue as a percentage of revenue may vary significantly from period to period due to the composition of payors for each period's billings. We expect that our costs of revenue will increase year-over-year in the near-term as a result of costs associated with the addition of the T-Cell Biomarkers and RA Sub-Profile Biomarkers to our AVISE® CTD test.

Current wording

Each payor, whether commercial, government, or individual, reimburses us at different amounts. These differences can be significant. As a result, our cost of revenue as a percentage of revenue may vary significantly from period to period due to the composition of payors for each period's billings. Our cost per AVISE® CTD test has increased year-over-year as a result of costs associated with the addition of the T-Cell Biomarkers and RA Sub-Profile Biomarkers to our AVISE® CTD test.

Previous wording

Selling, general and administrative expenses consist of personnel costs (including stock-based compensation expense), direct marketing expenses, accounting and legal expenses, consulting costs, and allocated overhead (including rent, information technology, depreciation and utilities). We expect that our selling, general and administrative expenses will increase year-over-year in the near-term as a result of increased headcount.

Current wording

Selling, general and administrative expenses consist of personnel costs (including stock-based compensation expense), direct marketing expenses, accounting and legal expenses, consulting costs and allocated overhead (including rent, information technology, depreciation and utilities).

Previous wording

Research and development expenses include costs incurred to develop our technology, test products and product candidates, in addition to costs incurred to collect clinical specimens and conduct clinical studies to develop and support those products and product candidates. These costs consist of personnel-related expenses (including stock-based compensation expense), materials, laboratory supplies, consulting costs, costs associated with setting up and conducting clinical studies and allocated overhead (including rent and utilities). We expense all research and development costs in the periods in which they are incurred. We expect that our research and development expenses will remain relatively consistent year-over-year in the near-term.

Current wording

Research and development expenses include costs incurred to develop our technology, test products and product candidates, in addition to costs incurred to collect clinical specimens and conduct clinical studies to develop and support those products and product candidates. These costs consist of personnel-related expenses (including stock-based compensation expense), materials, laboratory supplies, consulting costs, costs associated with setting up and conducting clinical studies and allocated overhead (including rent and utilities). We expense all research and development costs in the periods in which they are incurred.

Previous wording

Costs of revenue decreased $0.6 million, or 2.4%, for the year ended December 31, 2024 compared to the year ended December 31, 2023. This decrease was primarily due to decreases of $1.0 million in materials and supplies expenses and additional decreases in facilities and allocated overhead expenses, royalties expenses and phlebotomy expenses. These decreases were partially offset by an increase of $0.7 million in shipping and handling costs resulting from increased cost-per-shipment, offset in-part by reduced shipping volume; and an increase of $0.7 million in direct labor.

Current wording

Cost of revenue increased $5.2 million, or 23.3%, for the year ended December 31, 2025 compared to the year ended December 31, 2024. This increase was primarily due to increases of $3.7 million in materials and supplies expenses, $1.4 million in payroll and stock-based compensation expense, and $0.3 million in facilities and allocated overhead expenses. These increases were partially offset by a decrease of $0.2 million in shipping and handling costs.

Previous wording

Research and development expenses increased $0.5 million, or 10.5%, for the year ended December 31, 2024 compared to the year ended December 31, 2023. This increase was primarily due to increases of $0.7 million of personnel costs (including salaries, benefits and stock-based compensation) resulting from increased allocation of labor to research and development for laboratory personnel working on the validation of the T-Cell Biomarkers and RA Sub-Profile Biomarkers; and increases in professional service fees and laboratory expenses. These increases were partially offset by decreases of $0.3 million of clinical trial expenses and decreases in facilities and allocated overhead expenses.

Current wording

Research and development expenses increased $0.9 million, or 16.4%, for the year ended December 31, 2025 compared to the year ended December 31, 2024. This increase was primarily due to an increase of $0.6 million of personnel costs (including salaries, benefits and stock-based compensation) resulting from increased allocation of labor to research and development for laboratory personnel working on the validation of the T-Cell Biomarkers and RA Sub-Profile Biomarkers, and an increase of $0.3 million in clinical and facility-related expenses.

Previous wording

We have incurred net losses since our inception. For the years ended December 31, 2024 and 2023, we incurred a net loss of $15.1 million and $23.7 million, respectively, and we expect to incur additional losses in future periods. To date, we have generated only limited revenue, and despite any estimates we may make regarding our ability to become profitable, we may never achieve revenue sufficient to offset our expenses. As of December 31, 2024, we had an accumulated deficit of $294.3 million and cash and cash equivalents of $22.0 million. Cash in excess of immediate requirements is invested in accordance with our investment policy, primarily with a view to liquidity and capital preservation. Currently, our funds are held in cash and money market funds.

Current wording

We have incurred net losses since our inception. For the years ended December 31, 2025 and 2024, we incurred a net loss of $20.0 million and $15.1 million, respectively, and we expect to incur additional losses in future periods. To date, we have generated only limited revenue, and despite any estimates we may make regarding our ability to become profitable, we may never achieve revenue sufficient to offset our expenses. As of December 31, 2025, we had an accumulated deficit of $314.3 million and cash and cash equivalents of $32.2 million. Cash in excess of immediate requirements is invested in accordance with our investment policy, primarily with a view to liquidity and capital preservation. Currently, our funds are held in cash. A total of an additional $40.0 million is available at our option under the Perceptive Term Loan Facility as amended in March 2026 should we attain specified revenue levels and satisfy other conditions.

Previous wording

Since becoming a public company, our primary sources of capital have been cash inflows from product sales, sales of our common stock and, to a lesser extent, borrowings under our 2017 Term Loan. Our obligations under the Amended Loan Agreement are secured by a security interest in substantially all of our assets, including our intellectual property. The Amended Loan Agreement contains customary conditions to borrowing, events of default, and covenants, including covenants requiring us to maintain minimum liquidity of $2.0 million, covenants to achieve certain minimum amounts of revenue, and covenants limiting our ability to dispose of assets, undergo a change in control, merge with or acquire other entities, incur debt, incur liens, pay dividends or other distributions to holders of our capital stock, repurchase stock and make investments, in each case subject to certain exceptions. Per the

Current wording

Since becoming a public company, our primary sources of capital have been cash inflows from product sales, sales of our common stock and, to a lesser extent, borrowings under term loan facilities.

Previous wording

On November 17, 2023, we filed a registration statement on Form S-3 (Shelf Registration Statement) covering the offering, from time to time, of up to $150.0 million of common stock, preferred stock, debt securities, warrants and units, all of which remain available for sale at December 31, 2023.

Current wording

On November 17, 2023, we filed a registration statement on Form S-3 (Shelf Registration Statement) covering the offering, from time to time, of up to $150.0 million shares of our common stock, preferred stock, debt securities, warrants and units, of which $126.2 million remained available for sale at December 31, 2025.

Previous wording

On September 15, 2022, we entered into a sales agreement, as amended on November 17, 2023 (the Sales Agreement) with TD Securities (USA) LLC, as sales agent, pursuant to which the Company may offer and sell, from time to time, shares of Company common stock having an aggregate offering price of up to $50.0 million. The Company is not obligated to sell any shares of Company common stock in the offering and, as of December 31, 2024, the Company has not sold any shares of its common stock pursuant to the Sales Agreement.

Current wording

On September 15, 2022, we entered into the Amended Sales Agreement with TD Cowen, as sales agent, pursuant to which we may offer and sell, from time to time, shares of common stock having an aggregate offering price of up to $50.0 million. We are not obligated to sell any shares of our common stock under the Amended Sales Agreement. During the year ended December 31, 2025, we sold 360,554 shares of common stock under the Amended Sales Agreement at an average per share price of $9.82, for gross proceeds of approximately $3.5 million and net proceeds of approximately $3.4 million after deducting $0.1 million in commissions paid to TD Cowen and other offering expenses payable by us.

Previous wording

Our primary use of cash is to fund our operations as we continue to grow our business. We expect to continue to incur operating losses in the near term. In the short-term, we expect increases in costs of revenue as a result of costs associated with the addition of the T-Cell Biomarkers and RA Sub-Profile Biomarkers to our AVISE® CTD test. We also anticipate increases in our selling, general and administrative expenses due to increased headcount. We expect research and development expenses to remain relatively consistent in the short-term. We believe we have sufficient laboratory capacity to support increased test volume. Cash used to fund operating expenses is impacted by the timing of when we pay expenses, as reflected in the change in our outstanding accounts payable and accrued expenses.

Current wording

Our primary use of cash is to fund our operations as we continue to grow our business. We expect to continue to incur operating losses in the near term. In the short-term, we expect increases in cost of revenue as a result of costs associated with the addition of the T-Cell Biomarkers and RA Sub-Profile Biomarkers to our AVISE® CTD test. We also anticipate increases in our selling, general and administrative expenses due to increased headcount. We expect research and development expenses to remain relatively consistent in the short-term. We believe we have sufficient laboratory capacity to support increased test volume. Cash used to fund operating expenses is impacted by the timing of when we pay expenses, as reflected in the change in our outstanding accounts payable and accrued expenses.

Previous wording

We expect that our near- and longer-term liquidity requirements will continue to consist of working capital and general corporate expenses associated with the growth of our business, including payments we may be required to make upon the achievement of previously negotiated milestones associated with intellectual property we have licensed, payments related to non-cancelable purchase obligations for reagents, payments related to our principal and interest under our long term borrowing arrangements, payments for operating leases related to our office and laboratory space in Vista, CA and our office space in Carlsbad, CA, and payments for finance leases related to our laboratory equipment (see Note 4, "Borrowings," and Note 6, "Commitments and Contingencies," to our audited financial statements included in this Annual Report). Based on our current business plan, we believe that our existing cash and cash equivalents and our anticipated future revenue, will be sufficient to meet our anticipated cash requirements for at least the next 12 months from the date of this filing.

Current wording

We expect that our near- and longer-term liquidity requirements will continue to consist of working capital and general corporate expenses associated with the growth of our business, including payments we may be required to make upon the achievement of previously negotiated milestones associated with intellectual property we have licensed, payments related to non-cancelable purchase obligations for reagents, payments related to our principal and interest under our long term borrowing arrangements, payments for operating leases related to our office and laboratory space in Vista, CA and our office space in Carlsbad, CA, and payments for operating and finance leases related to our laboratory equipment (see "Note 4. Borrowings," "Note 5. Leases," and "Note 6. Commitments and Contingencies," to our audited financial statements included in this Annual Report). Based on our current business plan, we believe that our existing cash and cash equivalents and our anticipated future revenue, will be sufficient to meet our anticipated cash requirements for at least the next 12 months from the date of this filing.

Previous wording

Until such time, if ever, as we can generate revenue to support our costs structure, we expect to finance our operations as needed through equity offerings, debt financings or other capital sources, including potentially collaborations, licenses and other similar arrangements. Debt financing, if available, may involve agreements that include covenants limiting or restricting our ability to take specific actions, such as incurring additional debt, making capital expenditures or declaring dividends. To the extent that we raise additional capital through the sale of equity or convertible debt securities, the ownership interest of our stockholders may be diluted, and the terms of these securities may include liquidation or other preferences that adversely affect the rights of our common stockholders. If additional funding is required or desired, there can be no assurance that additional funds will be available to us on acceptable terms on a timely basis, if at all, or that we will generate sufficient cash from operations to adequately fund our operating needs or achieve or sustain profitability. If we are unable to raise additional capital or generate sufficient cash from operations to adequately fund our operations, we will need to delay, reduce or eliminate some or all of our research and development programs, product portfolio expansion plans or commercialization efforts. Doing so will likely have an unfavorable effect on our ability to execute on our business plan and could have a negative impact on our commercial and strategic relationships. If we cannot expand our operations or otherwise capitalize on our business opportunities because we lack sufficient capital, our business, financial condition, and results of operations could be adversely affected.

Current wording

Until such time, if ever, as we can generate revenue to support our costs structure, we may be required to finance our operations as needed through equity offerings, debt financings or other capital sources, including potential collaborations, licenses and other similar arrangements. The Perceptive Term Loan Facility involves, and any additional debt financing, if available, may involve agreements that include covenants limiting or restricting our ability to take specific actions, such as incurring additional debt, making capital expenditures or declaring dividends. To the extent that we raise additional capital through the sale of equity or convertible debt securities, the ownership interest of our stockholders may be diluted, and the terms of these securities may include liquidation or other preferences that adversely affect the rights of our common stockholders. If additional funding is required or desired, there can be no assurance that additional funds will be available to us on acceptable terms on a timely basis, if at all, or that we will generate sufficient cash from operations to adequately fund our operating needs or achieve or sustain profitability. If we are unable to raise additional capital or generate sufficient cash from operations to adequately fund our operations, we will need to delay, reduce or eliminate some or all of our research and development programs, product portfolio expansion plans or commercialization efforts. Doing so will likely have an unfavorable effect on our ability to execute on our business plan and could have a negative impact on our commercial and strategic relationships. If we cannot expand our operations or otherwise capitalize on our business opportunities because we lack sufficient capital, our business, financial condition, and results of operations could be adversely affected.

Previous wording

Net cash used in operating activities for the year ended December 31, 2023 was $14.5 million and primarily resulted from (i) our net loss of $23.7 million adjusted for non-cash charges of $8.9 million primarily related to stock-based compensation, depreciation, amortization, loss on disposal of assets primarily related to the assignment of a lease, non-cash lease expenses and non-cash interest and (ii) changes in our net operating assets of $0.3 million primarily related to net increases in prepaid expenses and other current assets and accounts receivable, and net decreases in operating lease liabilities, partially offset by net increases in accrued and other current liabilities.

Current wording

Net cash used in operating activities for the year ended December 31, 2025 was $13.6 million and primarily resulted from (i) our net loss of $20.0 million adjusted for non-cash charges of $8.3 million primarily related to stock-based compensation, depreciation, amortization, change in fair value of warrant liability, loss on extinguishment of debt, non-cash lease expense and non-cash interest and (ii) changes in our net operating assets of $2.0 million primarily related to net increases in accounts receivable and net decreases in operating lease liabilities, partially offset by net decreases in prepaid expenses and other current assets and other assets and increases in accrued and other current liabilities.

Previous wording

Net cash used in investing activities for the year ended December 31, 2024 and 2023 was $0.5 million and $0.8 million, respectively, and was primarily due to net purchases of property and equipment.

Current wording

Net cash used in investing activities for the year ended December 31, 2025 and 2024 was $0.6 million and $0.5 million, respectively, and was primarily due to net purchases of property and equipment.

Previous wording

Net cash used in financing activities for the year ended December 31, 2023 was $10.6 million, primarily consisting of principal payments on the Amended Loan Agreement, finance lease obligations and notes payable, partially offset by the proceeds from the ESPP purchases.

Current wording

Net cash used in financing activities for the year ended December 31, 2024 was $0.7 million, primarily consisting of principal payments on finance lease obligations and notes payable, partially offset by the proceeds from ESPP purchases.

Previous wording

Our management’s discussion and analysis of our financial condition and results of operations is based on our audited financial statements, which have been prepared in accordance with accounting principles generally accepted in United States of America (GAAP). The preparation of these audited financial statements requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the audited financial statements, as well as the reported revenue generated and expenses incurred during the reporting periods. Our estimates are based on our historical experience and on various other factors that we believe are reasonable under the circumstances, the results of which form the basis for making judgments about the carrying value of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions and any such differences may be material. We believe the following accounting estimates are the most critical to us, in that they require our most difficult, subjective or complex judgments in the preparation of our financial statements. For further information, see Note 2, "Summary of Significant Accounting Policies," to our Financial Statements, which outlines our application of significant accounting policies.

Current wording

Our management’s discussion and analysis of our financial condition and results of operations is based on our audited financial statements, which have been prepared in accordance with GAAP. The preparation of these audited financial statements requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the audited financial statements, as well as the reported revenue generated and expenses incurred during the reporting periods. Our estimates are based on our historical experience and on various other factors that we believe are reasonable under the circumstances, the results of which form the basis for making judgments about the carrying value of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions and any such differences may be material. We believe the following accounting estimates are the most critical to us, in that they require our most difficult, subjective or complex judgments in the preparation of our financial statements. For further information, see "Note 2. Summary of Significant Accounting Policies," to our Financial Statements, which outlines our application of significant accounting policies.

Previous wording

Payors are billed at our list price. Net revenues recognized consist of amounts billed net of allowances for differences between amounts billed and the estimated consideration we expect to receive from such payors. We follow a standard process, which considers historical denial and collection experience, insurance reimbursement policies and other factors, to estimate allowances and implicit price concessions, recording adjustments in the current period as changes in estimates. Further adjustments to the allowances, based on actual receipts, are recorded upon settlement. The transaction price is estimated using an expected value method on a portfolio basis. Our portfolios are grouped per payor (each individual third-party insurance, Medicare, Medicaid, client payors, patient self-pay, etc.) and per test basis.

Current wording

Payors are billed at our list price. Net revenues recognized consist of amounts billed net of allowances for differences between amounts billed and the estimated consideration we expect to receive from such payors. We follow a standard process, which considers historical denial and collection experience, insurance reimbursement policies and other factors, to estimate allowances and implicit price concessions, recording adjustments in the current period as changes in estimates. Further adjustments to the allowances, based on actual receipts, are recorded upon settlement. The transaction price is estimated using an expected value method on a portfolio basis. Our portfolios are grouped per payor (each individual third-party insurance, Medicare, Medicaid, client payors, patient self-pay, etc.) and on a per test basis.

Previous wording

The process for estimating revenues and the ultimate collection of accounts receivable involves significant judgment and estimation by management. We continually assess the state of our cash collections in order to identify areas of risk and opportunity that allow us to appropriately estimate receivables and revenue. Should we later determine the judgements underlying estimated collections change, our financial results could be impacted in future periods. Included in revenues for the years ended December 31, 2024 and 2023 were net revenue increases of $6.6 million and $3.4 million, respectively, associated with changes in estimated variable consideration related to performance obligations satisfied in previous periods.

Current wording

The process for estimating revenues and the ultimate collection of accounts receivable involves significant judgment and estimation by management. We continually assess the state of our cash collections in order to identify areas of risk and opportunity that allow us to appropriately estimate receivables and revenue. Should we later determine the judgments underlying estimated collections change, our financial results could be impacted in future periods. Included in revenues for the years ended December 31, 2025 and 2024 were net revenue increases of $0.9 million and $6.6 million, respectively, associated with changes in estimated variable consideration related to performance obligations satisfied in previous periods.