SeaStar Medical Holding Corp

Previous wording

On October 28, 2022, LMF consummated a series of transactions that resulted in the combination of LMF Merger Sub, Inc. and the Predecessor pursuant to an Agreement and Plan of Merger. Immediately upon consummation of the Business Combination, LMF was renamed SeaStar Medical Holdings Corporation (as defined above).

Current wording

On October 28, 2022, LMAO consummated a series of transactions that resulted in the combination of LMF Merger Sub, Inc. and the Predecessor pursuant to an Agreement and Plan of Merger. Immediately upon consummation of the Business Combination, LMAO was renamed SeaStar Medical Holding Corporation (as defined above).

Previous wording

The inflammatory response is critical to fend off infections and repair damaged tissue in the body. Central to inflammation are the cells within blood and lymph circulatory systems, called white blood cells (primarily neutrophils and monocytes), also referred to commonly as “pus” cells. In a normal inflammatory response, neutrophils are the first immune cells to arrive at the site and are key to the entire immune response that kills pathogens and promotes tissue repair. These inflammatory cells release chemicals (cytokines) that trigger the immune system to eliminate foreign pathogens or damaged tissue, enhancing the immune response.

Current wording

The inflammatory response is essential to the healing process of critical organs; however, the overactivation of inflammatory cells, which can be triggered by many different bodily insults such as trauma, surgery or infection, can send the body into shock and cause severe damage to a variety of critical organs such as the heart, lungs and kidney. Central to inflammation are the cells within blood and lymph circulatory systems, called white blood cells (primarily neutrophils and monocytes). In a normal inflammatory response, neutrophils are the first immune cells to arrive at the site and are key to the entire immune response that kills pathogens and promotes tissue repair. These inflammatory cells release chemicals (cytokines) that trigger the immune system to eliminate foreign pathogens or damaged tissue, enhancing the immune response.

Previous wording

If the inflammatory response becomes excessive and dysregulated, normal neutrophil die off may be delayed, altering feedback mechanisms that regulate the immune system. This results of damaging hyperinflammation spreading uncontrollably to other parts of the body, often leading to acute chronic solid organ dysfunction or failure, including heart, lung, kidney and liver diseases. This hyperinflammatory response is also known as the cytokine storm, referring to the body’s reaction to the category of small-secreted proteins released by hyperinflammatory cells that affect communication between cells. The cytokine storm, when left uncontrolled, can lead to organ damage and even death.

Current wording

If the inflammatory response becomes excessive and dysregulated (referred to as proinflammatory), the inflammatory cells will continue to produce cytokines and other damaging molecules, further enhancing the dysregulated immune response, and altering feedback mechanisms that regulate the immune system. This results in damaging hyperinflammation spreading uncontrollably to other parts of the body, often leading to acute chronic solid organ dysfunction or failure, including the heart, lung, kidney, liver, and even death. This hyperinflammatory response is also known as the “cytokine storm,” referring to the body’s reaction to the category of small-secreted proteins released by hyperinflammatory cells that affect communication between cells. Currently, there are no therapeutic options that specifically neutralize the white blood cells that are primarily responsible for the destructive hyperinflammatory response.

Previous wording

We are using our SCD initially to clinically validate several acute organ injury indications, including kidneys and lungs. Our investigational SCD for adults is an extracorporeal synthetic membrane device that is currently being evaluated in a pivotal clinical trial in the U.S. for premarket clearance by the FDA. The SCD for adults is designed to be easily integrated into existing CRRT systems that are commonly installed in hospitals, including in ICUs throughout the United States. Similar to our pediatric SCD (QUELIMMUNE), once approved and commercialized, our adult SCD is expected to initially target acute kidney injury in adults on CRRT. In addition, we are developing our SCD to address inflammation associated with liver disease, acute respiratory distress syndrome, chronic dialysis and chronic heart failure in adult populations. See Part I, Item 1A “Risk Factors” for additional information.

Current wording

We are using our SCD initially to clinically validate several acute organ injury indications, including kidneys and lungs. Our investigational SCD for adults is an extracorporeal synthetic membrane device that is currently being evaluated in a pivotal clinical trial in the U.S. for premarket clearance by the FDA. The SCD for adults is designed to be easily integrated into existing CRRT systems that are commonly installed in hospitals, including in ICUs throughout the United States. Similar to QUELIMMUNE, once approved and commercialized, our adult SCD is expected to initially target acute kidney injury in adults on CRRT. In addition, we are developing our SCD to address inflammation associated with liver disease, acute respiratory distress syndrome, chronic dialysis and chronic heart failure in adult populations. See Part I, Item 1A “Risk Factors” for additional information.

Previous wording

We have incurred net losses in each year since our inception in 2007. As of December 31, 2024 and 2023, we had an accumulated deficit of approximately $139.6 million and $114.7 million, respectively. Our net losses were $24.8 million and $26.2 million for the years ended December 31, 2024 and 2023, respectively. Approximately 72% and 54% of our net losses for the years-ended December 31, 2024 and 2023, respectively, resulted from costs incurred in connection with our research and development programs and from general and administrative costs associated with our operations. The remaining net losses primarily resulted from non-cash, non-operating changes in fair value of our financial instruments recognized in our statement of operations for the same two fiscal years. For the year ended December 31, 2024, these non-cash, non-operating losses related to change in fair value of convertible notes, change in fair value of liability classified warrants, and interest expense, which were partially offset by interest income.

Current wording

We have incurred net losses in each year since our inception in 2007. As of December 31, 2025 and 2024, we had an accumulated deficit of approximately $151.7 million and $139.6 million, respectively. Our net losses were $12.2 million and $24.8 million for the years ended December 31, 2025 and 2024, respectively. The majority of our net losses for the years-ended December 31, 2025 and 2024, respectively, resulted from costs incurred in connection with our research and development programs and from general and administrative costs associated with our operations. The remaining net losses primarily resulted from non-cash, non-operating changes in fair value of our financial instruments recognized in our statement of operations for the same two fiscal years. For the year ended December 31, 2025, these non-cash, non-operating losses related to change in fair value of convertible notes, change in fair value of liability classified warrants, and interest expense, which were partially offset by interest income.

Previous wording

Our need for additional capital will depend in part on the scope and costs of our development activities. To date, we have not generated significant revenue from the sale of commercialized products. Our ability to generate product revenue will depend on the successful development of our adult SCD and eventual ongoing commercialization of QUELIMMUNE. Until such time, if ever, we expect to finance our operations through the sale of equity or debt, borrowings under credit facilities, potential collaborations, other strategic transactions or government and other grants. Adequate capital may not be available to us when needed or on acceptable terms. If we are unable to raise capital, we could be forced to delay, reduce, suspend or cease our research and development programs or any future commercialization efforts, which would have a negative impact on our business, prospects, operating results and financial condition. See Part I, Item 1A “Risk Factors” for additional information.

Current wording

Our need for additional capital will depend in part on the scope and costs of our development activities. To date, we have not generated significant revenue from the sale of commercialized products. Our ability to generate significant product revenue will depend on the successful development of our adult SCD and eventual ongoing commercialization of QUELIMMUNE. Until such time, if ever, we expect to finance our operations through the sale of equity or debt, borrowings under credit facilities, potential collaborations, other strategic transactions or government and other grants. Adequate capital may not be available to us when needed or on acceptable terms. If we are unable to raise capital, we could be forced to delay, reduce, suspend or cease our research and development programs or any future commercialization efforts, which would have a negative impact on our business, prospects, operating results and financial condition. See Part I, Item 1A “Risk Factors” for additional information.

Previous wording

Our pediatric SCD received HDE approval from the FDA in February 2024. Since that time, we have begun to build out our commercial operations, develop our customer base and initiate commercial sales of QUELIMMUNE. We shipped our first commercial QUELIMMUNE units in July 2024. Through December 31, 2024, we have recognized approximately $0.1 million of revenue from the sale of QUELIMMUNE. Historically, prior period revenue has been primarily derived from government and other grants. We will continue to focus our efforts on generating revenue in the future based on product sales of QUELIMMUNE, as well as potential future payments from license or collaboration agreements and government and other grants.

Current wording

Our pediatric SCD therapy, QUELIMMUNE, received HDE approval from the FDA in February 2024. Since that time, we have been building out our commercial operations, developing our customer base and growing commercial sales of QUELIMMUNE. We shipped our first commercial QUELIMMUNE units in July 2024. We recognized $1.2 million and $0.1 million of revenue from the sale of QUELIMMUNE for the years ended December 31, 2025 and 2024, respectively. Historically, prior to 2024, revenue has been primarily derived from government and other grants. We will continue to focus our efforts on generating revenue in the future based on product sales of QUELIMMUNE, as well as potential future payments from license or collaboration agreements and government and other grants.

Previous wording

We expect that any revenue we generate will fluctuate from quarter to quarter as we introduce QUELIMMUNE to pediatric hospital customers. We also continue to develop our adult SCD for which we are enrolling patients in a pivotal study to support FDA approval. If we fail to complete the development of, or fail to obtain regulatory approval to commercialize our adult SCD in a timely manner, our ability to generate future revenue, and our results of operations and financial position, could be materially adversely affected.

Current wording

We expect that any revenue we generate will fluctuate from quarter to quarter as we continue to advance our sales of QUELIMMUNE to pediatric hospital customers. We also continue to develop our adult SCD for which we are currently enrolling patients in a pivotal study to support FDA approval. If we fail to complete the development of, or fail to obtain regulatory approval to commercialize our adult SCD in a timely manner, our ability to generate additional future revenue, and our results of operations and financial position, could be materially adversely affected.

Previous wording

Total other income (expense), net primarily consists of interest expense relating to interest incurred on our notes, financing fees related to our convertible notes, gain on issuance of convertible notes, change in fair value of convertible notes, change in fair value of warrants liability, termination of forward purchase agreement, gains from early extinguishments of convertible notes, changes in fair value of the derivative liability related to the conversion option of convertible notes, and interest income derived from cash balances maintained at a commercial financial institution.

Current wording

Total other income (expense), net primarily consists of (i) interest expense relating to interest incurred on notes payable, (ii) a one-time charge for a financing fee related to our standby equity purchase agreement, (iii) changes in the fair value of liability classified warrants, and (iv) interest income derived from cash balances maintained at a commercial financial institution.

Previous wording

Net loss consists of our loss from operations, less other expenses, net.

Current wording

Net loss consists of our loss from operations, offset by other income, net and taxes.

Previous wording

Other income (expense) for the years ended December 31, 2024 and 2023 was expense of $7.0 million and $12.0 million, respectively. The decrease of approximately $5.0 million primarily resulted from (i) $4.2 million decline in the loss from the change in fair value on extinguishments of convertible notes, (ii) a decrease in interest expense of $0.8 million due to the reduction in our outstanding notes and convertible notes, (iii) interest income of $0.1 million during 2024 compared to $0.0 million for 2023, and (iv) we did not recognize a loss from the change in the fair value of forward purchase agreement derivative liabilities for 2024 as the instrument did not exist during 2024, while incurring a loss on the change in fair value of forward purchase agreement derivative liabilities of $1.3 million in 2023.

Current wording

Other income (expense) for the years ended December 31, 2025 and 2024 was other income, net of $28 thousand and other expense, net of $7.0 million, respectively. The change was the result of (i) interest income increasing $0.2 million as a result of our increased cash during the 2025 fiscal year compared to the 2024 fiscal year, (ii) $0.2 million decline in interest expense due to the reduction in our outstanding notes and convertible notes, (iii) a $6.1 million loss on the change in fair value of convertible notes in the fiscal year ended December 31, 2024, with no such charge during the year ended December 31, 2025, and (iv) we recognized a $32 thousand gain on the change in fair value of liability classified warrants for the year ended December 31, 2025, compared to a loss of $0.7 million for the year ended December 31, 2024.

Previous wording

We recorded a provision for income taxes of $3 thousand for the year ended December 31, 2024, and did not record a provision for income taxes for the year ended December 31, 2023.

Current wording

We recorded a provision for income taxes of $3 thousand for each of the years ended December 31, 2025, and 2024, respectively.

Previous wording

Under Accounting Standards Codification (“ASC”) 740-10-30-5, Income Taxes, deferred tax assets should be reduced by a valuation allowance if, based on the weight of available evidence, it is more-likely-than-not (i.e., a likelihood of more than 50%) that some portion or all of the deferred tax assets will not be realized. We consider all positive and negative evidence available in determining the potential realization of deferred tax assets including, primarily, the recent history of taxable earnings or losses. Based on operating losses reported during 2024 and 2023, we concluded there was not sufficient positive evidence to overcome this recent operating history. As a result, we believe that a valuation allowance continues to be necessary based on the more-likely-than-not threshold noted above. A valuation allowance of $28.5 million and $25.6 million was recorded as of and for the years ended December 31, 2024 and 2023, respectively.

Current wording

Under Accounting Standards Codification (“ASC”) 740-10-30-5, Income Taxes, deferred tax assets should be reduced by a valuation allowance if, based on the weight of available evidence, it is more-likely-than-not (i.e., a likelihood of more than 50%) that some portion or all of the deferred tax assets will not be realized. We consider all positive and negative evidence available in determining the potential realization of deferred tax assets including, primarily, the recent history of taxable earnings or losses. Based on operating losses reported during 2025 and 2024, we concluded there was not sufficient positive evidence to overcome this recent operating history. As a result, we believe that a valuation allowance continues to be necessary based on the more-likely-than-not threshold noted above. A valuation allowance of $32.0 million and $28.5 million was recorded as of and for the years ended December 31, 2025 and 2024, respectively.

Previous wording

During the year ended December 31, 2024, we had a net loss of $24.8 million compared to a net loss of $26.2 million for the year ended December 31, 2023. The decline in net loss of $1.4 million primarily resulted from a decline in other expense of $5.0 million (as discussed above in “Other Income (Expense)” offset by increases in general and administrative expenses of $0.6 million, and increases in research and development expenses of $3.1 million.

Current wording

During the year ended December 31, 2025, we had a net loss of $12.2 million compared to a net loss of $24.8 million for the year ended December 31, 2024. The decline in net loss of $12.7 million primarily resulted from (i) a $1.0 million increase in revenue in 2025 compared to 2024, (ii) $4.6 million decrease in operating expenses in 2025 compared to 2024, and (iii) $7.0 million favorable change in other income or expense in 2025 compared to 2024.

Previous wording

To date, we have financed our operations primarily through the sale of equity securities and convertible debt and, to a lesser extent, through grants from governmental and other agencies. Since our inception, we have incurred significant operating losses and negative cash flows. As of December 31, 2024 and December 31, 2023, we had an accumulated deficit of $139.6 million and $114.7 million, respectively.

Current wording

To date, we have financed our operations primarily through the sale of equity securities and convertible debt and, to a lesser extent, through grants from governmental and other agencies. Since our inception, we have incurred significant operating losses and negative cash flows. As of December 31, 2025 and 2024, we had an accumulated deficit of $151.7 million and $139.6 million, respectively.

Previous wording

As of December 31, 2024 and December 31, 2023, we had cash of $1.8 million and $0.2 million, respectively. We expect that our existing cash will be insufficient to fund our operations for the twelve months from filing date of our Form 10-K for the year ended December 31, 2024, including clinical trial expenses and capital expenditure requirements. We believe that this raises doubt about our ability to continue as a going concern. To finance our operations beyond that point, we would need to raise additional capital, and there is no guarantee that we will be able to secure additional funding on favorable terms, or at all. We have concluded that these circumstances raise doubt about our ability to continue as a going concern within one year after the issuance date of this Annual Report. See Note 1 to our audited consolidated financial statements for the year ended December 31, 2024.

Current wording

As of December 31, 2025, we had cash of $12.0 million. We expect that our existing cash will be insufficient to fund our operations for the twelve months from the filing date of this Annual Report for the year ended December 31, 2025, including clinical trial expenses and capital expenditure requirements. We believe that this raises substantial doubt about our ability to continue as a going concern. To finance our operations beyond that point, we would need to raise additional capital, and there is no guarantee that we will be able to secure additional funding on favorable terms, or at all. We have concluded that these circumstances raise substantial doubt about our ability to continue as a going concern within one year after the issuance date of this Annual Report. See Note 1 to our audited consolidated financial statements for the year ended December 31, 2025.

Previous wording

Net cash used in operating activities for the fiscal year ended December 31, 2024 was $16.0 million compared to $10.3 million for the fiscal year ended December 31, 2023. The increase in cash used for operating activities of $5.7 million is primarily due to the increased activity related to clinical trial activities for the Neutralize-AKI clinical trial, and certain general and administrative costs.

Current wording

Net cash used in operating activities for the fiscal year ended December 31, 2025 was $13.6 million compared to $16.0 million for the fiscal year ended December 31, 2024. The decrease in cash used for operating activities of $2.4 million is primarily due to the decline in consulting, legal and accounting related activities (seeResults of Operations above).

Previous wording

Net cash provided by financing activities for the fiscal year ended December 31, 2024, was $17.7 million, primarily related to the issuance of new shares of common stock from the combination of certain registered direct offerings andat-the-market issuances, proceeds from convertible notes, and proceeds from the issuance of pre-funded warrants.

Current wording

Net cash provided by financing activity for the fiscal year ended December 31, 2024, was $17.7 million, primarily related to proceeds from the issuance of common stock from certain registered direct offerings and ATM issuances, proceeds from the issuance of convertible notes, and proceeds from the issuance of certain pre-funded warrants.

Previous wording

Shelf Registration 333-275968 -On December 8, 2023, we filed a shelf registration on Form S-3. which was declared effective by the SEC on December 22, 2023. This shelf registration statement covered the offering, issuance and sale by us of up to an aggregate of $100.0 million of its common stock, preferred stock, debt securities, warrants, rights and units (the “2023 Shelf”). Since the date of effectiveness, we have raised approximately $23.5 million as of December 31, 2024, through the combination of registered direct offerings and “At-the-Market” offerings. As of December 31, 2024, we have approximately $76.5 million remaining to for future offerings, of which, $20.5 million is currently restricted to capital raised from the “At-the-Market” offering.

Current wording

On December 8, 2023, we filed a shelf registration statement on Form S-3 (File No. 333-275968), which was declared effective by the SEC on December 22, 2023. This shelf registration statement covered the offering, issuance and sale of up to an aggregate of $100.0 million of our common stock, preferred stock, debt securities, warrants, rights and units (the “2023 Shelf”).

Previous wording

Until such time, if ever, as we are able to successfully develop and commercialize our products, we expect to continue financing our operations through the sale of equity, issuance of debt, borrowings under credit facilities or through potential collaborations with other companies, other strategic transactions or government or other grants. Adequate capital may not be available when needed or on acceptable terms.

Current wording

Until such time, if ever, as we are able to successfully develop and fully commercialize our products, we expect to continue financing our operations through the sale of equity, issuance of debt, borrowings under credit facilities or through potential collaborations with other companies, other strategic transactions or government or other grants. Adequate capital may not be available when needed or on acceptable terms.

Previous wording

Based on our results of operations and liquidity as of December 31, 2024, we believe our cash and cash equivalents are not sufficient to meet our operations, working capital and capital expenditure requirements for a period of at least twelve months from the date of our audited consolidated financial statements for the fiscal year ended December 31, 2024. In addition, we do not expect to receive significant cash proceeds from the exercise of warrants in the near term, because the trading price of our common stock is currently below the exercise price of the majority of the warrants. We are seeking additional cash to fund our growth through future debt or equity financing transactions; however, there can be no assurance that we will be able to obtain additional capital on terms acceptable to us, if at all, or that we will generate sufficient future revenues and cash flows to fund our operations. Our estimates of our results of operations, working capital and capital expenditure requirements may be different than our actual needs, and those estimates may need to be revised if, for example, our actual revenue is lower, and our net operating losses are higher, than we project and our cash and cash equivalents position is reduced faster than anticipated.

Current wording

Based on our results of operations and liquidity as of December 31, 2025, we believe our cash is not sufficient to meet our operations, working capital and capital expenditure requirements for a period of at least twelve months from the date of our audited consolidated financial statements for the fiscal year ended December 31, 2025. In addition, we do not expect to receive significant cash proceeds from the exercise of warrants in the near term, because the trading price of our common stock is currently below the exercise price of the majority of the warrants. We will require additional cash to fund our growth through future debt or equity financing transactions; however, there can be no assurance that we will be able to obtain additional capital on terms acceptable to us, if at all, or that we will generate sufficient future revenues and cash flows to fund our operations. Our estimates of our results of operations, working capital and capital expenditure requirements may be different than our actual needs, and those estimates may need to be revised if, for example, our actual revenue is lower, and our net operating losses are higher than we project and our cash position is reduced faster than anticipated.

Previous wording

Significant estimates include the valuation of the (i) incurred-but-not-billed clinical trial costs, (ii) prepaid forward purchase agreement derivative liability, (iii) convertible notes (iv) liability classified warrants, (v) share-based compensation expense.

Current wording

Significant estimates include the valuation of the (i) incurred-but-not-billed clinical trial site costs, (ii) liability classified warrants, and (iii) stock-based compensation expense.

Previous wording

Incurred-But-Not-Billed Clinical Trial Site Costs. Our Neutralize-AKI clinical trial study is conducted at 14 qualified healthcare facilities as of December 31, 2024. We are responsible to cover the costs of these clinical trial efforts, including the cost of patient care relating to the adult SCD, It is common practice that the costs incurred by the clinical trial sites are incurred, but not billed until months after the event giving rise to the unbilled activity. Accordingly, we estimate the value of these “incurred-but-not-billed” activities at the end of each reporting period. Any impact to the Statement of Operations is recognized as a component of research and development expense and included as a component of accrued expenses on the Balance Sheet.

Current wording

*Incurred-But-Not-Billed Clinical Trial Site Costs.*Our NEUTRALIZE-AKI clinical trial is being conducted at multiple qualified healthcare facilities as of December 31, 2025. We are responsible to cover the costs of these clinical trial efforts, including the cost of patient care relating to the adult SCD. It is common practice that the costs incurred by the clinical trial sites are incurred, but not billed until months after the event giving rise to the unbilled activity. Accordingly, we estimate the value of these “incurred-but-not-billed” activities at the end of each reporting period. Any impact to the consolidated statement of operations is recognized as a component of research and development expense and included as a component of accrued expenses on the consolidated balance sheet.

Previous wording

Liability Classified Warrants. We have entered into or assumed various financial instruments in the form of warrant agreements that require classification as liabilities. This classification requires us to measure the warrants at fair value at inception, and the remeasure the warrants. The liability classified warrants consist of the following: (see Note 10 for more information):

Current wording

Liability Classified Warrants. We have entered into or assumed various financial instruments in the form of warrant agreements that require classification as liabilities. This classification requires us to measure the warrants at fair value at inception and then remeasure the fair value of the warrants at each reporting period. The liability classified warrants consist of the following (see Note 8 for more information):

Previous wording

Share Based Compensation Expense. We estimate the grant date fair value of all grants of equity-based awards (which has historically consisted of either stock options or restricted stock units).

Current wording

*Stock-Based Compensation Expense.*We estimate the grant date fair value of all grants of equity-based awards (which has historically consisted of either stock options or restricted stock units). We use a Black-Scholes option pricing model to fair value of stock options, and use the price of our stock on the grant date for restricted stock units.

Previous wording

We are an emerging growth company (“EGC”), as defined in the JOBS Act. The JOBS Act permits companies with EGC status to take advantage of an extended transition period to comply with new or revised accounting standards, delaying the adoption of these accounting standards until they apply to private companies. We have elected to use this extended transition period to enable us to comply with new or revised accounting standards that have different effective dates for public and private companies until the earlier of the date we (i) are no longer an emerging growth company or (ii) affirmatively and irrevocably opt out of the extended transition period provided in the JOBS Act. As a result, our consolidated financial statements may not be comparable to companies that comply with the new or revised accounting standards as of public company effective dates.

Current wording

We are an emerging growth company (“EGC”), as defined in the JOBS Act. The JOBS Act permits companies with EGC status to take advantage of an extended transition period to comply with new or revised accounting standards, delaying the adoption of these accounting standards until they apply to private companies. We have elected to use this extended transition period to enable us to comply with new or revised accounting standards that have different effective dates for public and private companies until the earlier of the date we (i) are no longer an EGC or (ii) affirmatively and irrevocably opt out of the extended transition period provided in the JOBS Act. As a result, our consolidated financial statements may not be comparable to companies that comply with the new or revised accounting standards as of public company effective dates.

Previous wording

In October 2024, we entered into a financing arrangement with a lender to finance a portion of the annual premium of an insurance policy in the amount of $0.7 million. It is to be paid down in 10 monthly installments through August 2025.

Current wording

In October 2025, we entered into a financing arrangement with a lender to finance a portion of the annual premium of an insurance policy in the amount of $0.7 million. It is to be paid down in 10 monthly installments through August 2026. This financing arrangement is recorded as a note payable on our consolidated balance sheet.