Portions of

EXPLANATORY NOTE

SeaStar Medical Holding Corporation (“SeaStar,” the Registrant's definitive proxy statement relating“Company,” “we,” “us,” and “our”) is filing this Amendment No. 1 on Form 10-K/A for the year ended December 31, 2022 (the “Form 10-K/A”) to its 2023 annual meeting of stockholders to beamend our Annual Report on Form 10-K for the year ended December 31, 2022, originally filed with the Securities and Exchange Commission within 120 days after(the “SEC”) on March 30, 2023 (the “Original Form 10-K”). We are filing this Form 10-K/A to present the endinformation required by Part III of Form 10-K that was previously omitted from the Original Form 10-K in reliance on General Instruction G. (3) to Form 10-K. The Company is hereby amending the Original Form 10-K as follows:

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CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS

This Annual Report on Form 10-K (this “Annual Report”) contains statements that are forward-looking and as such are not historical facts. These statements are based on the beliefs and assumptions of management. Although the Company believes that its plans, intentions, and expectations reflected in or suggested by these forward-looking statements are reasonable, the Company cannot assure you that it will achieve or realize these plans, intentions, or expectations. Forward-looking statements are inherently subject to risks, uncertainties, and assumptions. Generally, statements that are not historical facts, including statements concerning the Company’s possible or assumed future actions, business strategies, events, or results of operations, are forward-looking statements. In some instances, these statements may be preceded by, followed by or include the words “believes,” “estimates,” “expects,” “projects,” “forecasts,” “may,” “will,” “should,” “seeks,” “plans,” “scheduled,” “anticipates” or “intends” or the negatives of these terms or variations of them or similar terminology.

Forward-looking statements are not guarantees of performance. You should not put undue reliance on these statements which speak only as of the date hereof. You should understand that the following important factors, among others, could affect the Company’s future results and could cause those results or other outcomes to differ materially from those expressed or implied in the Company’s forward-looking statements:

These and other factors that could cause actual results to differ from those implied by the forward-looking statements in this Annual Report are more fully described in the “Risk Factors” section. The risks described in “Risk Factors” are not exhaustive. New risk factors emerge from time to time, and it is not possible for us to predict all such risk factors, nor can the Company assess the impact of all such risk factors on its business or the extent to which any factor or combination of factors may cause actual results to differ materially from those contained in any forward-looking statements. All forward-looking statements attributable to the Company or persons acting on its behalf are expressly qualified in their entirety by the foregoing cautionary statements. The Company undertakes no obligations to update or revise publicly any forward-looking statements, whether as a result of new information, future events or otherwise, except as required by law.

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PART IIII

Item 1. Business.10. Directors, Executive Officers and Corporate Governance.

Unless the context otherwise requires, all references in this section to "SeaStar Medical," the “Company,” “we,” “us” or “our” refer to SeaStar Medical Holding Corporation and its consolidated subsidiaries following the Business Combination (as defined herein), other than certain historical information that refers to the business of SeaStar Medical prior t0o the consummation of the Business Combination.

Overview

We are a medical technology company developing a platform therapy to reduce the consequences of hyperinflammation on vital organs. 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) or 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 cell release chemicals (cytokines) which trigger the immune system to eliminate the foreign pathogens or damaged tissue, enhancing the immune response. If the inflammatory response becomes excessive and dysregulated (referred as proinflammatory), normal neutrophil die off (“apoptosis”) may be delayed, allowing the inflammatory cells to continue to produce cytokines further enhancing the dysregulated immune response, 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 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.

Based on clinical and preclinical studies conducted over the last 15 years, the Company’s technology has shown promise in modulating the degree of activity of proinflammatory cells to help reduce tissue damage and speed the repair and recovery of organ function. We believe this approach, if successful, will transform the ability of clinicians to treat acute organ failure in the intensive care unit (“ICU”) and to improve organ function in hospitalized patients. Currently few therapeutics are available to clinicians to address the issue of hyperinflammation and for those options that do exist, such options are either immunosuppressive or only target one cytokine. We believe our technology has the potential to overcome limitations in existing anti-inflammatory treatments and address the challenge in selectively targeting activated neutrophils and monocytes. We are leveraging our patent protected and scalable technology platform to develop proprietary therapies that are organ agnostic and target both acute and chronic indications.

We are using our proprietary Selective Cytopheretic Device ("SCD") technology platform initially to clinically validate several acute organ injury indications, including kidneys and lungs. Our investigational SCD is an extracorporeal synthetic membrane device designed to be easily integrated into existing continuous renal replacement therapy ("CRRT") systems that are commonly installed in hospitals, including in ICUs throughout the United States. Once approved and commercialized, our SCD would initially target acute kidney injury in both the pediatric CRRT population as well as adults on CRRT. In addition, we are developing our SCD to address inflammation associated with chronic dialysis and chronic heart failure.

Preclinically, our SCD was tested in various animal models, which include acute myocardial infarction, intracranial hemorrhage, chronic heart failure, sepsis and acute respiratory distress syndrome. The animal models showed the inflammatory response and how it was modified by our SCD. We will continue to explore the application of our SCD technology across a broad range of markets and indications whereproinflammatory activated neutrophils and monocytes may contribute to disease progression or severity in both acute and chronic indications.

There is substantial clinical demand for safe and effective control of hyperinflammation. Existing treatment options in hyperinflammation include the use of corticosteroids (immunosuppression) and absorbent technologies that either directly absorb cytokines, viruses, bacteria or endotoxins and pharmaceuticals that target cytokines and the immune cascade. None selectively addresses activated neutrophils or monocytes. The use of our SCD to reverse the cytokine storm in pediatric and adult patients with acute kidney injury on CRRT in clinical studies with more than 140

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patients reduced mortality rates by 50%, and, of those patients who survive 60 days, none have required dialysis. The unique mechanism of action (modulation of neutrophils and monocytes) has exhibited consistent clinical outcomes in both adults as well as children. Given the clinical advantages of our SCD, we believe our SCD has the potential to become a preferred course of treatment by clinicians for hyperinflammatory indications based on its potential to improve patient outcomes, increase survival rates, reduce dialysis dependence, and ultimately lower healthcare costs.

As of December 31, 2022, our SCD has been used in approximately 170 adult and pediatric patients on an investigational basis. In June 2022, we submitted a humanitarian device exemption ("HDE") application with the U.S. Food & Drug Administration ("FDA") for pediatric patients with acute kidney injury ("AKI") on CRRT. Based on the current timeline of the HDE application, we expect the FDA to complete its substantive review of our HDE application during the first half of 2023; however, there is no guarantee that the FDA will approve our HDE application. In addition, on February 9, 2023, we received approval from the FDA of our investigational device exemption ("IDE") application to conduct a pivotal study evaluating the effectiveness of SCD in reducing hyperinflammation in adults with AKI requiring CRRT. The Company plans to begin enrollment in Q2 2023 and expect to generate interim study results during the fourth quarter of 2023 and topline study results and submission of a Pre-market Approval ("PMA") application in the second half of 2024. On April 29, 2022, we received a Breakthrough Device Designation ("BDD") for the use of our SCD in the treatment of immunomodulatory dysregulation in adult patients (18 and older) with AKI, which is expected to accelerate the regulatory approval process for such trial.There is no guarantee that we will complete the AKI adult trial in a timely manner, or at all, nor will there be any assurance that positive data will be generated from such trial. Even if we are able to generate positive results from these trials, the FDA may require us to conduct additional trials to support the study, or disagree with the design of the trials and request changes or improvements to such design.

We believe that our novel therapeutic device is readily applicable for use in other indications, which will require additional clinical studies and FDA approval. As we continue our work to expand indications, we believe we will have the ability to take advantage of economies of scale to reduce costs of production. We believe our scalable manufacturing processdemonstrates a significant competitive advantage in the hyperinflammatory market.

We have pursued patent protection for our SCD technology as well as other technologies, which consists of 40 patents and 10 pending patent applications in the U.S. and certain foreign jurisdictions. Of these patents and patent applications 33 are owned exclusively by us, and 17 are co-owned with the University of Michigan ("UOM"). UOM has granted to us an exclusive worldwide, royalty bearing license to UOM’s interest in all of the co-owned patents and applications. This license permits us to commercialize our SCD in all human therapeutic indications. For more information, see “ — Intellectual Property” below.

We intend to continue to shape our commercial and distribution strategy by expanding indications and pursue collaborations with partners in markets where such partners provide strategic capabilities in launching our product candidates and enabling access to specific patient populations. On December 27, 2022, we entered into a license and distribution agreement (the “Distribution Agreement”) with Nuwellis, Inc. (“Nuwellis”), pursuant to which we appointed Nuwellis as our exclusive distributor for the sale and distribution of SCD product throughout the United States once we receive from the FDA a written authorization to market such product for pediatric use pursuant to our HDE application. Pursuant to the Distribution Agreement, we received an upfront payment, and will receive milestone payments upon achievement of certain milestones and royalties on gross sales of the SCD product. The Distribution Agreement has an initial term commencing on December 27, 2022 and shall end on the three (3) year anniversary from the date that is the earlier of (a) ninety (90) days after we receive FDA authorization to market such SCD product for pediatric use and (b) the first commercial sale of the SCD product. The term of the Distribution Agreement may be automatically extended for additional terms of one (1) year and for a total of two (2) extensions. Each party has the right to terminate the Distribution Agreement for material breach if such breach is not cured within ninety (90) days after written notice and we have additional rights to terminate the Distribution Agreement in accordance with other terms set forth in the Distribution Agreement.

Our senior management teamManagement and Board have an average of more than 19 years of experience in the healthcare industry, including expertise in medical affairs, commercialization and distribution in our initial therapeutic priority areas. We are also supported by a group of well-respected scientific advisors who are experts in the development of our technology and products.

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Corporate History

SeaStar Medical, Inc. was initially incorporated under the name Nephrion, Inc. on June 6, 2007. On August 3, 2007, we amended our corporate name to CytoPherx, Inc. On June 19, 2019, we amended our corporate name to SeaStar Medical, Inc.

On October 28, 2022,LMF Acquisition Opportunities, Inc. (“LMAO”), a Delaware corporation, consummated a series of transactions that resulted in the combination of LMF Merger Sub, Inc., a Delaware corporation and a wholly-owned subsidiary of LMAO (“Merger Sub”), and SeaStar Medical, Inc., a Delaware corporation, pursuant to an Agreement and Plan of Merger, dated April 21, 2022 (the “Merger Agreement”), by and among LMAO, Merger Sub and SeaStar Medical, Inc. (the "Closing"). Pursuant to the terms of the Merger Agreement, a business combination between LMAO and SeaStar Medical, Inc. was affected through the merger of Merger Sub with and into SeaStar Medical, Inc., with SeaStar Medical, Inc. surviving the merger as a wholly-owned subsidiary of LMAO (the “Business Combination”). Following the consummation of the Business Combination, LMAO was renamed “SeaStar Medical Holding Corporation” (the “Company”).

Our Approach

The acute inflammatory response occurs in a well-defined coordinated sequential response. Neutrophils are the first responders followed by monocytes. The monocytes, as they egress into tissue also follow another sequence of differentiation into tissue macrophages. The first are proinflammatory macrophages, followed by patrolling, reparative macrophages.

This complex tightly coordinated process is critical for host defense and tissue repair but needs to be tightly regulated by the body’s inflammatory signaling and cellular apoptosis. If not, further tissue destruction may occur when uncontrolled hyperinflammation leads to degradative reparative processes with worsening tissue or organ function. If this excessive systemic inflammation is severe and prolonged, multi-organ failure, including cardiovascular, respiratory, kidney, liver and neurologic dysfunction may occur, resulting in poor clinical outcomes. Prior therapeutic approaches to block soluble mediator targets, such as a cytokines or free radicals have not proven successful. We believe that our SCD approach, which targets activated cells, is a potentially transformative, if not disruptive, therapeutic approach to a range of acute and chronic inflammatory disorders.

Our SCD is an extracorporeal synthetic membrane device designed to bind activated leukocytes (neutrophils and monocytes) as part of a CRRT extracorporeal circuit. When added to the circuit and release of a standard CRRT system (using regional citrate anticoagulation) immediately following a standard hemofilter cartridge, blood within

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the standard hemofilter cartridge enters our SCD and disperses among the fibers of the device. Upon exiting our SCD under a low calcium environment, the blood is returned to the patient’s body.

Our SCD delivers its therapeutic benefit by attenuating the excessive inflammatory response of activated neutrophils and monocytes. Uninterrupted, the excessive inflammatory response progresses to multi-organ failure (“MOF”), with documented increases in both morbidity and mortality in critically ill patients. Our initial lead product is focused on critically ill AKI pediatric and adult patients on CRRT. Our SCD leverages the existing footprint of CRRT pump systems in ICUs today, as well as the growing use and adoption of regional citrate as an anticoagulant. Citrate is used to bind the free ionized calcium within the extracorporeal circuit which is needed to impact the neutrophils and monocytes. A recent study in the Journal of the American Medical Association in 2020 demonstrated that while the use of regional citrate anticoagulation has the same mortality profile as heparin, regional citrate anticoagulation now showed to be more effective in preserving filter life as used to create the low calcium environment for our SCD, which impacts the white cells interaction with the SCD membrane leading to the reduction in inflammation.

Mechanism of Action

The mechanism of action of our SCD consists of two steps: 1) binding activated neutrophils and monocytes on our SCD biomimetic membrane and 2) deactivating the activated neutrophils by maintaining a specified ionized calcium level within our SCD. Our SCD utilizes clinically approved regional citrate anticoagulation protocols to lower the ionized calcium level, which prevents blood clogging within the circuit and immuno-modulates the activated

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neutrophils, which are then returned to the patient. Calcium is then infused into the blood returning to the patient from the SCD, thereby maintaining normal calcium levels in the patient throughout the process.

Our SCD and Neutrophils

Calcium plays a critical role in many biological processes. In the case of neutrophils, calcium can have a profound effect on their activity. It has been shown that lowering calcium levels in neutrophils can lead to higher levels of neutrophil apoptosis (deactivation). Our SCD is designed to selectively bind the most highly activated neutrophils (associated with hyperinflammation) and in a low iCa environment, the activated neutrophils are deactivated, which has the effect of reducing hyperinflammation. When neutrophils are in homeostasis, the normal half-life is six to eight hours, but in a hyperinflammatory state, neutrophil apoptosis is delayed leading to increased numbers of activated neutrophils in circulation. Through clinical and preclinical studies, our SCD has been shown to selectively sequester and deactivate the most highly activated neutrophils, allowing the body to restore neutrophil homeostasis.

Our SCD and Monocytes

We believe the role of circulating monocytes in systemic inflammation and organ specific injury is becoming more appreciated by healthcare professionals. Calcium also has an important influence on monocyte activity. A high percentage of the circulating monocyte subtypes (M1 proinflammatory versus M2 patrolling, reparative) has been shown to influence the degree of acute organ injury and chronic organ dysfunction. In vitro, our SCD membranes in a low iCa perfusion circuit binds the proinflammatory monocytes within the blood more selectively. This selective binding has been shown in clinical trials and results in less proinflammatory circulating monocytes in inflammatory disorders. It is important to note that our SCD does not sequester 100% of these monocytes as they are important to maintaining immune homeostasis.

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Histological evaluation of our SCD

Microscopy of our SCD after being used for patient treatment demonstrated the binding of leukocytes on the outer surface of the membranes of the cartridge along the blood flow path within the extracorporeal circuit. The bound leukocytes were dominated by neutrophils and monocytes (see Figure 1 below).

The ability of neutrophils and monocytes to bind to the outer walls of the hollow fiber membranes (figure below) rather than the inner walls, which is the conventional blood flow path, is due to the difference in shear forces of blood flow. The sheer force of our SCD is similar to capillary flow providing a microenvironment for the neutrophils and monocytes, enabling the cells to catch and release.

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Our Market Opportunity

We are a therapeutic medical device company with clinical data collected and available to support a HDE submission to the FDA to request the use of our SCD in pediatric patients with AKI and additional clinical data intended to support the initiation of a pivotal PMA study in adult AKI. In the long term, we intend to pursue the application of our SCD technology to additional indications, including, but not limited to, acute respiratory distress syndrome, chronic dialysis, cardiorenal syndrome and hepatorenal syndrome.

Our Initial Market Opportunity in Acute Kidney Injury

We believe AKI has increasingly received the attention of healthcare professionals and academic publications that reveal the devastating clinical and financial impact of what is most-often a multi-organ syndrome. A 2017 study by Samuel A. Silver and Glenn M Chertow titled “The Economic Consequences of Acute Kidney Injury” stated hospital costs associated with AKI in the U.S. are between $5.4 billion and $20 billion per year.

The kidneys are a silent killer within medical triage. They do not present clear symptoms or tell the body they are suffering like other major organs such as the heart or lungs. For example, one does not feel pain with a “kidney attack” and symptoms are delayed until irreversible damage may have already occurred. Kidneys also refrain from revealing the impact to the rest of body and organs (and vice-versa) and often are not considered systemically for co-treatment.

Globally consistent criteria for diagnosing AKI have recently emerged with Risk, Injury, Failure, Loss of kidney function, and End-stage kidney disease ("RIFLE"), an international consensus classification for AKI staging and diagnosing guidelines introduced in 2004, the Acute Kidney Injury Network ("AKIN") staging system in 2007, and finally the Kidney Disease: Improving Global Outcomes, AKI Staging and Diagnosing Guidelines published in 2012. These sources have helped clinicians to both improve recognition, staging, diagnosing and subsequent documentation of less obvious cases of AKI secondary diagnoses. While our initial market is focused on AKI patients on CRRT, future indications will likely benefit from improved characterization and diagnosis of patients.

As a result, demand for ICU renal replacement therapy is growing. CRRT is the newest of AKI dialysis modality in the market, first becoming available in 1997, and according to Fortune Business Insights, it is estimated that it has grown to a $986 million global market ($354 million market in the U.S.) as of 2019. The two largest operators in the CRRT market by revenue are Fresenius Medical Care Holdings, Inc. and Baxter International, which represent over 80% of the market today in the U.S.

Since 2010, a significant amount of data has been published to quantify the clinical and financial impact of AKI, resulting in a broadening AKI treatment “boom” beyond dialysis to areas of diagnostics, complimentary therapies, and pharmacologics. As hospital administrators and government officials’ understanding of the impact and burden of AKI increases, we believe that attention will only continue to grow. According to Hobson in his article titled “Cost and Mortality Associated with Postoperative Acute Kidney Injury,” a 2015 study of 50,314 patients (over 11 years) found that upon greater scrutiny, AKI was found in 39% of post-surgical patients, and 19% of patients had stage 2 or 3 AKI with an average incremental cost of $29,800 per patient. Additionally, with historical mortality rates approximately 50%, treating AKI is increasingly of interest to clinicians, hospitals, and product manufacturers alike.

The AKI patient population is growing on average 6.9% per year according to the Healthcare Cost and Utilization Project commissioned by the Agency for Healthcare Research and Quality, a U.S. federal agency. According to Massicotte and Azarniouch in their 2015 work titled “Acute Kidney Injury in the Intensive Care Unit: Risk Factors and Outcomes of Physician Recognition Compared with KDIGO Classification,” around 80% of moderate or severe cases of AKI are not diagnosed and documented, suggesting the U.S. AKI patient population is higher than the estimated 6 million patients annually. The pediatric population for AKI patients on CRRT is estimated to be less than 8,000 patients per year, which is a substantially small sub-set of the 6 million AKI patient population.

The AKI market needs new and effective solutions, and hospitals continue to search and evaluate new products. For a product to succeed in the AKI space, it must demonstrate and achieve clear and significant clinical benefit to patients, while providing positive financial incentives for hospitals to generate revenue and profitability.

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Our Growth Strategies

Key elements of our growth strategy include innovating and expand our applications through clinical trials; differentiation through medical education; business development and out-licensing activities and scaling production with manufacturing partners. We expect to employ several core growth strategies:

Our Clinical Stage Product Candidates

The following disclosure summarizes our SCD product candidates in clinical stages and other clinical studies. All trials and studies below are conducted under IDEs approved by the FDA.

We submitted an HDE application for SCD for the treatment of pediatric patients with acute kidney injury undergoing CRRT with the FDA in June 2022. We expect the FDA to complete substantive review of the HDE application by the first half of 2023.

Clinical Progression

SCD 006 Pivotal Study (“SCD 006”) Design

We are in the process of initiating a pivotal clinical trial of the SCD for the treatment of AKI in adults under the recent grant of BDD by the FDA. This trial ("SCD 006") is a 200 patient, pivotal, prospective, multi-center, open

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label, randomized, two-arm comparative study conducted in the United States. The SCD 006 trial is designed to assess a composite endpoint of both mortality and dialysis dependency at Day 60. Our target population will be adults with AKI in ICUs in hospital settings and has an estimated 60-day mortality rate of 40% to 50% and for those who survive, the probability of requiring dialysis at Day 60 will be 25%.

Current Trial Status

We submitted the SCD 006 IDE Protocol to the FDA on January 6, 2023. We anticipate the trial to begin enrollment late in the second quarter of 2023 and is anticipated to complete enrollment in 15 to 18 months. On April 29, 2022, we received a BDD for the use of our SCD in the treatment of immunomodulatory dysregulation in adult patients (18 and older) with AKI, which should accelerate the regulatory review and approval process for such trial. We currently anticipate generating interim results from this trial in late 2023 and topline study results and submission of a PMA application in the second half of 2024.

Additional clinical studies under IDEs include cardiorenal syndrome in congested heart failure, myocardial stunning in end-stage renal disease, and hepatorenal syndrome. We are conducting exploratory clinical research at the University of Michigan to define the patient population for potential treatment with SCD product candidates, and any future studies will be based upon initial clinical data collected in these studies.

Clinical Studies

With the exception of our SCD 003, all of our clinical studies to date have not had a randomized control arm.
AKI Safety, Mortality and Device Integrity Study (CHINA) (ASAIO Journal 57:426-432,2011)
(January 2009 to April 2010)

A study of the SCD was conducted by SeaStar Medical in collaboration with Huashan Hospital in Shanghai, China titled: An Exploratory Clinical Study to Assess Safety and Efficacy of the Double Hemofiltration Cartridge Device (DCD) in Patients with Acute Renal Failure. This study was a prospective, non-randomized, interventional study designed to evaluate the effect of treatment with the SCD on in-hospital mortality in the acute renal failure population being treated with CRRT with regional citrate anticoagulation (“RCA”). Up to seven days of therapy were allowed. All subjects received standard intensive care treatment for patients undergoing CRRT in addition to the SCD treatment.

In this nine-patient study, the SCD treatment was demonstrated to reduce the mortality rates of ICU patients with AKI in hospitals compared with case-matched controls from a national dataset, based on deaths resulting from all causes in the hospital setting. The study showed a 22% mortality rates in the SCD treatment arm versus a mortality rate of 78% in the case-matched control group. This improved survival rate was demonstrated to be independent of age and Sequential Organ Failure Assessment (“SOFA”) Score, which is a scoring system used to predict ICU mortality based on lab results and clinical data. The results from this study indicated that treatment with SCD was well tolerated, without significant effects on hematological parameters, including white blood cell and platelet counts, and with an adverse event profile that was expected for a seriously ill population in the ICU with AKI.

In the nine subjects analyzed on SCD treatment, no neutropenic events were reported, and no serious adverse events (“SAEs”) were reported. Adverse events noted included hypercalcemia (8), hypocalcemia (1), hypophosphatemia (2), hypernatremia (1) and thrombocytopenia (1).

A multi-center pilot study to assess the safety and efficacy of a SCD in Patients with Acute Renal Failure (ARF 002) (Seminars in Dialysis Vol 26, Issue 5 :616-623,2013) (May 2010 to January 2011)

This pilot study of the SCD device (ARF-002 Clinical Trial) was sponsored by SeaStar Medical with the support of a third-party contract research organization. The study was designed to evaluate the safety and efficacy of the SCD treatment after up to seven consecutive 24-hour SCD treatments. Outcomes were compared to historical data on in-hospital mortality based on all causes of deaths at day 28 and day 60 in the AKI population being treated with CRRT with RCA.

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The study enrolled 35 adult subjects. The mean age was 56.3 and 71.4% of the subjects were Caucasian, 22.9% were Black and 5.7% were Hispanic. The average SOFA score was 11.3. The mortality rate from any cause at Day 60 was 31.4% with SCD versus 50% with the historical standard of care based on literature. Renal recovery, defined as dialysis independence, was observed in all the surviving subjects at Day 60. Based on the significantly lower mortality rate, the results of this pilot study indicate a potential for a substantial improvement in patient outcomes over historical standard of care therapy.

A total of 199 adverse events (“AEs”) were observed in 33 of the 35 subjects. Of these 199 AEs, 12 were deemed to be possibly related and one was deemed related (as determined by the investigator) to the study therapy. These included a worsening coagulation defect, hypotension, neutropenia, disseminated intravascular coagulation (“DIC”), thrombocytopenia, recurrent renal failure, hypophosphatemia, hypercalcemia, anemia, and cardiogenic shock. Of the 199 total adverse events, 34.7% were deemed to be mild and were experienced by 60% of the subjects, 51.8% were moderate and experienced by 71% of the subjects and 13.6% were severe, experienced by 54% of the subjects. The AEs observed were those that were expected for a critically ill patient population with acute renal failure and/or in an ICU setting. Twenty-eight SAEs were observed in 23 subjects (which included death). There were no unanticipated adverse device effects. Of these 28 SAEs, two were deemed to be possibly related to treatment (i.e., DIC and cardiogenic shock) and were severe in intensity. Of the SAEs, seven of the 28, or 25%, were deemed to be moderate and were experienced by 20% of the 35 subjects, and 21 (75%) were deemed to be severe, experienced by 51% of the 35 subjects. The following table lists all SAEs encountered during the study by category and the assessment of each SAE:

This was a controlled, randomized, and multicenter clinical trial that was initiated in September 2011 and terminated in September 2013 under an FDA approved IDE. For this trial, the control group received standard CRRT with RCA and the SCD-treated group received up to seven days of SCD therapy. The study was sponsored by SeaStar Medical with the support of a third-party contract research organization.

The primary objective of the study was to determine if the SCD, when used in conjunction with CRRT, results in clinical and statistical improvement in mortality rate based on all causes through Day 60. Secondary objectives included an assessment of renal replacement therapy dependency at Day 60, mortality at Day 28, the number of ventilator free days at Day 28, and the mortality of the subset of patients with severe sepsis at Day 60.

A total of 134 patients were enrolled in 21 United States medical centers. Patients receiving care in the ICU of each participating hospital were randomized to intensive care treatment for patients undergoing CRRT or CRRT + SCD. Each participating clinical site used their established RCA protocol for the CRRT + SCD circuits (treatment group) and for the CRRT only (control group). The recommended calcium (iCal) level (measured post SCD) in the CRRT

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and SCD blood circuit was specified to be between 0.25 and 0.4 mmol/L. Inclusion and exclusion criteria were similar to the previous IDE multicenter pilot clinical study except for an age range of 8-80 years and body weight of over 135 kilograms. Once the patient met all eligibility criteria, including being on CRRT for a minimum of four hours, but no longer than 24 hours, and had signed an informed consent, the subject was randomized in a 1:1 allocation utilizing a random permuted block design into either the control or treatment group, stratified by study center and the presence of severe sepsis. An overall two-sided 0.05 level of significance at 80% power was used to calculate a sample size of 344 patients, assuming a mortality rate of 50% for the control group and 35% for the treatment group. Adaptive design and interim analysis were planned at the mid-point of enrollment (i.e., 172 patients). Several exploratory biomarkers were also compared between the control and treatment groups, including urine output, serum levels of elastase, cytokines, and total absolute white blood cell, neutrophil and platelet counts throughout treatment.

During the second quarter of the enrollment period, a national calcium shortage occurred in the United States due to certain FDA-related quality manufacturing issues at major U.S. suppliers. Due to the reliance of the SCD on a narrow intra-circuit iCa range for functional efficacy and the concern that patients randomized to the SCD were not receiving effective therapy due to insufficient iCa levels, the interim analysis was performed early after enrollment of 134 patients. Enrollment was paused on May 24, 2013 to assess the clinical impact of the calcium shortage on study endpoints. The shortage of calcium infusion solutions resulted in a tendency to minimize citrate infusion rates. Accordingly, the iCa levels within the blood circuit tended to be above the recommended range of 0.25 to 0.40 mmol/L. No significant differences were noted between the control and treatment groups in terms of baseline characteristics. Of the 134 patients in the analysis, 69 received CRRT alone and 65 received SCD therapy. No statistically significant difference was found between the treated and control patients with a 60-day mortality of 39% (27/69) and 36% (21/59), respectively. No statistically significant difference was found between the SAEs of the control and treatment groups. Furthermore, none of the SAEs were considered ‘definitely’ device related per the principal investigator. The amount of time patients in both the control and treatment group were maintained in the recommended iCa range (0.23 - 0.40 mmol/L), as specified in the study protocol, was substantially lower than expected. Of the 134 patients enrolled in the SCD-003 protocol at the time of the interim analysis, 19 SCD patients (CRRT + SCD) and 31 control patients (CRRT alone) were maintained in the protocol’s recommended range for greater or equal to 90% of the therapy time. The study was subsequently terminated.

No statistically significant difference was found between the SAEs of the control and treatment groups. The study reported 71 SAEs in the control group (40 of the 63 patients) and 80 SAEs in the SCD treatment group (45 of the 69 patients). The most frequent categories of SAEs were infections and infestations as well as cardiac, respiratory, thoracic and mediastinal disorders. Furthermore, none of the SAEs were considered “definitely” related to the SCD device per the principal investigator. Overall adverse events did not differ between the treatment and control groups in the intent to treat analysis. The following table lists all SAEs encountered during the study by category and the assessment of each SAE:

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When the iCa treated and control subgroups were compared for a composite index of 60-day mortality and dialysis dependency, the percentage of the SCD treated subjects was 16% versus 58% in the control subjects. The incidence of serious adverse events did not differ between the treated and control groups.

A new IDE was FDA approved on February 12, 2014 for a pivotal trial of 122 patients in up to 30 sites utilizing this primary composite endpoint. If this trial met safety and effectiveness criteria, the FDA stated that a premarket approval and clearance was supportable. This clinical trial was not initiated in 2014 due to continuing injectable calcium shortages, and the company limited the clinical focus to the pediatric indications, where less calcium was needed due to size of study (pediatric study had 15% of the patients compared to pivotal trial of 122 patients).

Safety and early efficacy trial of our SCD therapy in pediatric patients with AKI requiring CRRT (December 2016 and February 2020)

A multi-center, prospective pilot study was undertaken to assess the safety and efficacy of our SCD in pediatric patients with AKI being treated with continuous kidney replacement therapy with RCA. The primary objective of the study was to evaluate the safety of up to seven consecutive 24-hour treatments of our SCD. The secondary objective was to evaluate the efficacy of up to seven consecutive 24-hour SCD treatments on all-cause mortality and dialysis dependency at day 28 and day 60. This study was sponsored by SeaStar Medical with the support of a third-party contract research organization.

Sixteen patients (eight male and eight female) were enrolled in the study at four United States pediatric medical centers, which ran from December 2016 through February 2020. The most common diagnosis leading to ICU admission was septic shock followed by, in diminishing order, pneumonia, rhabdomyolysis, pulmonary hypertension, hemolytic uremic syndrome, encephalomyelitis, disseminated adenoviral infection, cardiac arrest, acute respiratory failure and acute liver failure.

Twelve of the 16 patients survived (75%) to hospital discharge (versus historical control of 50%) and none of the 12 patients required dialysis at 60 days (versus historical control of 15% to 20%). There were 14 SAEs that occurred in fourteen patients in the study. None of the SAEs were device related. There were 47 adverse events that occurred in 14 subjects in the study. The following table lists all SAEs encountered during the study by category and the assessment of each SAE:

A Multi-Center Pilot Study to Assess the Safety and Efficacy of a Selective Cytopheretic Device in Patients Developing AKI or Acute Respiratory Distress Syndrome Associated with COVID-19

(September 2020 to July 2021). Publication: Critical Care Exploration

Twenty-two subjects were enrolled in this pilot study at two leading medical centers. All enrolled patients were treated with corticosteroids, either dexamethasone or hydrocortisone. The majority of enrolled patients also received remdesivir. Sixteen patients were included in the contemporaneous control. Sixteen of the intent to treat (“ITT”) patients received greater than 96 hours of our SCD treatment per protocol (“PP”) since the inclusion criteria required

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an intent to treat for at least 96 hours. This study was sponsored by SeaStar Medical with the support of a third-party contract research organization.

The mortality rate of the ITT group at 60 days post-initiation of our SCD treatment was 50% and was 31% for the PP group. The control group had a mortality rate of 81%, which was higher than both the ITT and PP treated groups. The patients in the control group on Extracorporeal Membrane Oxygenation treatment did not survive, while 44% survived in the ITT group. For dialysis dependency at 60 days, 60% of the survivors had not recovered renal function in the ITT group; however, a post-hoc follow up at 90 days demonstrated that only 30% of the survivors still required dialytic support.

Fifty SAEs occurred in 18 subjects. Of note, 22 nosocomial and opportunistic infections were reported in 12 subjects during the entire 60-day follow-up period. Sixteen of the 22 infections occurred after SCD treatment. None of these SAEs were device-related as determined by the site clinical investigators and the independent safety review committee. No RCA-related adverse events were observed with greater than 90% of measured circuit ionized calcium (iCa) values less than 0.4 mmol/L. Systemic iCa values were within the normal ranges required by the clinical protocol. Two circuit clotting events were reported; clotting was initiated in the hemodialysis catheter in one instance and in the hemofilter in the other. No SCD clotting episodes were reported. No episodes of thrombocytopenia, neutropenia, or leukopenia were observed. The following table lists all SAEs encountered during the study by category and the assessment of each SAE:

SeaStar Medical and the principal investigators of SCD-005 COVID-19 clinical study have recently been accepted and were recently published in Critical Care Exploration; a peer reviewed academic journal.

Chronic Applications

Pilot Feasibility Trial of SCD Therapy in ESRD Patients (May 2012 to April 2013)

Our SCD therapy was evaluated in a more stable end stage renal disease (“ESRD”) patient cohort on chronic hemodialysis. Fifteen ESRD patients were enrolled to assess the safety and early efficacy signals on inflammatory biomarkers. Our SCD therapy promoted a monocyte shift from predominant proinflammatory to reparative phenotype.

Very few adverse events or SAEs were observed during SCD treatment and RCA. SCD treatment and RCA was associated with adverse events in four of the 13 patients. The adverse events were comprised of one episode each of

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fever, chills, headache, itching, coughing, dizziness, muscle cramps, nausea, vomiting, and chest pain. These adverse events are frequently experienced by patients undergoing standard hemodialysis treatment. No adverse events were definitively related to SCD therapy. SCD treatment and heparin anticoagulation, however, resulted in symptomatic and biochemical events. The initial two patients (Pt1 and Pt2) of this cohort, treated with SCD and heparin anticoagulation, demonstrated a large rise in C-reactive protein levels from 22 to 38 (Pt1) and 51–132 (Pt2) mg/L after four hours of SCD treatment. C-reactive protein levels continued to be elevated at 93 (Pt1) and 147 (Pt2) mg/L on day 1 post-SCD treatment. Because of these events, no further patients were recruited for SCD treatment and heparin anticoagulation. The following table lists all SAEs encountered during the study by category and the assessment of each SAE:

Additional Indications with Preclinical Data

The initial research and translation of our SCD into clinical studies was targeted to treat the acute dysregulated systemic inflammation associated with AKI and MOF. Due to the broad applications of immunomodulatory therapy, preclinical models were developed to evaluate the efficacy of our SCD to ameliorate single organ tissue injury.

A Multi-Center, Randomized, Controlled, Pivotal Study to Assess the Safety and Efficacy of A Selective Cytopheretic Device in Patients with Acute Kidney Injury (SCD-003 – IDEG090189) (September 2011 to May 2013)

Clinical Studies

Additional Indications with Preclinical Data

The initial research and translation of our SCD into clinical studies was targeted to treat the acute dysregulated systemic inflammation associated with AKI and Multi Organ Failure. Due to the broad applications of immunomodulatory therapy, preclinical models were developed to evaluate the efficacy of our SCD to ameliorate single organ tissue injury.

Chronic Inflammatory Disorders

Chronic Heart Failure

Prior preclinical and clinical evaluations of our SCD therapy have focused on acute inflammatory conditions related to organ dysfunction and failure. Extensions of the immunomodulatory approach to improve organ dysfunction related to chronic inflammation would be transformative. Over the past decade, a number of novel pharmacologic approaches have failed to prove clinical efficacy, accentuating the need to discover new, safe approaches to treat chronic heart failure (“CHF”). In this regard, our SCD was evaluated in a preclinical model of CHF to dampen the cardio-depressant effects of the chronic proinflammatory state of CHF. Chronic heart failure and acute decompensated heart failure have been increasingly recognized as associated with chronic systemic inflammation. Monocytes have been identified as critical sources of systemic inflammation in CHF and may cause a decrease in cardiac myocyte contractility.

Cardiorenal Syndrome

Cardiorenal syndrome (“CRS”) is a clinical disorder in which therapy to relieve the congestive symptoms of chronic heart failure is limited by a decline in renal function. Up to one-third of patients with acute decompensated chronic heart failure present with this disorder; this condition is increasing in incidence with an estimated one million hospital admissions annually in the United States. Once hospitalized, these patients are treated with high dose intravenous diuretics to relieve the persistent congestion. The use of diuretics, however, frequently results in worsening renal function, progression of heart failure and death. Immune dysregulation plays a key role in cardiorenal syndrome.

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Myocardial Ischemia in End-Stage Renal Disease Patients on Chronic Hemodialysis

A major cause of death in patients on chronic dialysis is due to cardiovascular disease. Novel interventions need to be identified and tested to ameliorate the high morbidity and mortality of myocardial disease in these patients. Multiple hemodynamic and inflammatory factors contribute to the elevated risk of cardiac disease in the chronic hemodialysis patient populations. Hemodialysis treatment is associated with repetitive ischemic events, or myocardial stunning, and is identified with regional wall motion abnormalities on echocardiograms. This repetitive ischemic stress results in progressive damage resulting in declines in left ventricular ejection fraction and risk for sudden cardiac death. Both acute and chronic inflammation and its cellular immunologic effector, the activated monocyte, are central to the accelerated cardiovascular disease in patients with chronic end-stage renal disease.

Studies at the University of Michigan

Cardiorenal Syndrome Clinical Trial

The CRS clinical trial is a safety and efficacy dose escalation study in 10 patients that was designed to evaluate whether ultrafiltration therapy in CRS, a disease with a dismal prognosis and currently ineffective therapy, with use of the SCD therapy will improve cardiac and renal (production of urine) functions. In the study, an improvement of cardiac function is measured by the rate of ejection fraction, which is the percentage of blood leaving the heart each time it contracts. An improvement of renal function is measured by the serum creatinine and blood urine nitrogen (two common biomarkers to assess renal function). In addition, a variety of other biomarkers will also be measured. The successful completion of this study is expected to demonstrate proof-of-concept for an innovative approach to the treatment of CRS. Initial results will provide important feasibility data for a follow-on study to undertake a controlled randomized clinical trial to evaluate the clinical efficacy of our SCD in CRS patients that have failed ultrafiltration therapy.

Myocardial Ischemia in End-Stage Renal Disease Patients on Chronic Hemodialysis Clinical Trial

Pilot safety and efficacy study in 10 patients to evaluate the reduction in myocardial stunning events in hemodialysis patients. The primary outcome will measure the change in regional wall abnormalities identified on an echocardiogram. Initial results will provide important feasibility data for a follow-on study to undertake a controlled randomized clinical trial to evaluate the clinical efficacy of the SCD in myocardial stunning hemodialysis patients.

Clinical Study

Product Development

Our first generation SCD has been based upon the design of a synthetic hemofilter due to the reduced regulatory risk of an FDA approved polysulfone hollow fiber cartridge. Second generation prototypes will include flat end caps to allow consistent implementation of the therapy, which we expect is more suitable as we scale up our operations.

We are currently evaluating altered configuration for differing clinical indication, so that pricing decisions can be made based upon unmet medical need and product specifications.

Suppliers

We source critical components from vendors that have been approved and qualified through our vendor management program. Fresenius Medical Care North America (“FMCNA”) is the current supplier of the filter used in our pediatric acute kidney injury indication. In March 2022, we entered into a supply agreement (the “Supply Agreement”) with an FMCNA affiliate, Fresenius USA Marketing, Inc. (“FUSA”), to supply certain filters at an agreed amount per case for use in our SCD product in our upcoming clinical trial and any additional clinical trials. We may resell the filters as part of the SCD system in both an Emergency Use Authorization application as well as a future PMA-approved product. The initial term of the Supply Agreement is for three years commencing on March 31, 2022. Either party may terminate the Supply Agreement for uncured material breach or for the insolvency of the other party. In addition, either party may terminate the Supply Agreement if in the reasonable opinion of legal counsel for either party, any future changes in federal or state law or regulations make any portion of the Supply

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Agreement invalid or illegal and the parties are not able to agree on mutually acceptable addendum to the Supply Agreement. We have agreed to indemnify FUSA against certain third-party claims.

We are in the process of developing a second source for the adult and pediatric filters, which will enable us to better manage any supply disruptions. In addition, we have secured a supplier to provide the tubing set required to assemble the SCD device, although we are able to identify and secure additional sources of supplies for the tubing set as it is readily available in the market.

Distribution

The Supply Agreement contains a provision granting FUSA a first right of refusal for the first three years after regulatory approval of our SCD product candidate to distribute the pediatric and adult products in the United States. If during such period, SeaStar Medical elects to promote and sell the SCD through distributors, SeaStar Medical will be required to provide FUSA with a right of first refusal to be SeaStar Medical’s exclusive distributor of the SCD in the United States and its territories, provided that the SCD is not promoted or sold in a manner that is incompatible with any devices manufactured and/or sold by FUSA or its affiliates. On December 27, 2022, we entered into a license and distribution agreement with Nuwellis. We appointed Nuwellis as our exclusive distributor for the sale and distribution of SCD product throughout the United States once we receive written authorization from the FDA to market our SCD for pediatric use pursuant to our HDE application.

Third-Party Reimbursement

We anticipate that coverage and reimbursement by Centers for Medicare and Medicaid Services ("CMS") and private payors will be essential for most patients and health care providers to afford our treatments, particularly in the applications of continuous renal replacement therapy for dialysis access and the treatment of hyperinflammatory conditions, including AKI. Accordingly, future sales of our products will depend substantially, both domestically and abroad, on reimbursement by government authorities, private health coverage insurers and other third-party payors. Our strategy around reimbursement focuses on achieving alignment and agreement from CMS on coding and payment pathways; both are critical to influencing and achieving optimal reimbursement payment from private payor sources. Therefore, we continue to develop a comprehensive reimbursement strategy including CMS, private payors and other key stakeholders to ensure a clear and sustainable reimbursement path for all SCD product opportunities.

We are pursuing a regulatory reimbursement strategy to ensure separate Medicare payment for our SCD at an appropriate price. The regulatory strategy includes engaging CMS political and career staff directly on coverage, payment and coding followed by submission of formal applications in these areas once FDA approval is obtained. It is difficult to predict what CMS will decide with respect to coverage and reimbursement for fundamentally novel products. See “Risk Factors — Risks Related to the Company’s Business Operations — Should the Company’s products be approved for commercialization, lack of third-party coverage and reimbursement for the Company’s devices could delay or limit their adoption.”

Intellectual Property

We strive to protect the proprietary technologies that we believe are important to our business. We have and will continue to seek patent protection for our SCD product and related technologies, as well for any future products. In addition to seeking patent protection, we also rely on trade secrets to protect aspects of our business that are not amenable to, or that we do not consider appropriate for, patent protection. We also rely on know-how, confidentiality agreements, license agreements and other agreements to establish and protect our proprietary rights. Our success depends in large part on our ability to protect our proprietary technology, including our SCD technologies, and to operate without infringing the proprietary rights of third parties.

The term of individual patents depends on the legal term of the patents in the countries in which they are obtained. In most countries in which we file, the patent term is 20 years from the earliest date of filing a non-provisional patent application. In the United States, a patent’s term may be lengthened by patent term adjustment, which

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compensates a patentee for administrative delays by the U.S. Patent and Trademark Office in granting a patent. A U.S. patent term may be shortened, if a patent is terminally disclaimed by its owner, over another patent.

The Company currently has 18 issued U.S. patents and 5 pending U.S. patent applications. The Company also has 22 issued foreign patents and has 5 pending foreign patent applications. The Company’s issued patents begin to expire in 2028, with the last of these patents expiring in 2034, although terminal disclaimers, patent term extension or patent term adjustment can shorten or lengthen the patent term.Directors

The following table summarizes the numbersets forth, as of April 26, 2023, ages and titles of our patentsexecutive officers and patent applications as of December 31, 2022:

With respect to our SCD technologies, we own patents and patent applications in five patent families. The patents and applications in Patent Family 1 are co-owned by the Company and UOM. The patents and applications in Patent Families 2-5 are solely owned by the Company. The inventions disclosed in Patent Families 1-4 were developed with U.S. government funding and are subject to the obligations under the Bayh-Dole Act.

Patent Family 1 contains nine U.S. patents and one pending U.S. patent application directed to systems and methods for processing leukocytes and for treating subjects with various inflammatory conditions using a SCD cartridge, and to a SCD cartridge. These patents will expire from 2028-2031, and the pending application, if granted, will expire in 2028, assuming that the required maintenance fees are paid. We also co-own with UOM counterpart patents granted in Canada, Japan and New Zealand, and one patent application pending in Europe. These counterpart patents, and applications, if granted, will expire in 2028, assuming that the required maintenance fees are paid. The patents and applications in Patent Family 1 are as follows:

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Patent Family 1†directors.

Directors

PursuantEric Schlorff has served as a Director and the Chief Executive Officer of SeaStar Medical since July 2019 and as Chief Operating Officer from March 2019 to July 2019. Mr. Schlorff also previously served as a license agreement with UOM (as amended,Director of SeaStar Medical from June 2016 to May 2019. From 1999 to 2019, Mr. Schlorff served in multiple roles at the “UOM License Agreement”), UOMDow Chemical Company in Midland, Michigan and Indianapolis, Indiana. From June 2016 to February 2019, Mr. Schlorff served as Global Director of Alternative Investments for the Dow Chemical Pension Plan, and Global Finance Leader for Crop Protection & Seeds at Dow AgroSciences from June 2013 to June 2016. Additional leadership positions held by Mr. Schlorff include the Global Market Intelligence Leader at Dow AgroSciences, Global Financial Manager of Royalties at Dow AgroSciences, Senior Investment Manager of Alternative Investments at Dow Chemical Company, New Business Development of Pharmaceuticals at Dow Chemical Company, Global Financial Analyst within the New Businesses division at The Dow Chemical Company, and Global Financial Analyst within Dow AgroSciences at The Dow Chemical Company.

Kenneth Van Heel has granted usserved as a worldwide, royalty bearing, exclusive licenseDirector of SeaStar Medical since 2021 and previously served as a Director from 2011 to their interest2015. Mr. Van Heel has also served as Chief Executive Officer at Motorcity Systems, a software provider in the co-owned patentstrucking and applicationstransportation industry, since November 2021. Since June 2012, Mr. Van Heel has also served as a Director and Advisor at Gantec, Inc., a biotechnology company for agricultural products. From June 2019 to June 2021, Mr. Van Heel served as an Advisor at Motorcity Systems. Prior to joining Motorcity Systems, Mr. Van Heel served in Patent Family 1various roles at The Dow Chemical Company. At The Dow Chemical Company, from 2016 to 2021, Mr. Van Heel served as the Global Director of Strategic Planning; from 2012 to 2016, Mr. Van Heel served as the Director of Alternative Investments and CIO Canadian Pension Plan; from 2006 to 2016, Mr. Van Heel served as Director of Alternative Investments; from 2003 to 2006, Mr. Van Heel served as the Senior Manager of Private Equity; from 2000 to 2003, Mr. Van Heel served as the Manager of Dow Corporate Venture Capital; and from 1986 to 2000, Mr. Van Heel held various positions within the Ventures and Business Development division.

Rick Barnett has received the Corporate Director certification from NACD in the field of medical devices for human therapeutics for certain technologies used in the SCD technology platform, including composition of matter2021 and methods of use patents. In consideration for such exclusive license, during the termhas served as a Director of the UOM License Agreement, we agreed to pay UOM a royalty fee equal to 1% of net sales and reimbursement of patent costs. To date, we have not paid and do not owe any royalty payments under the UOM License Agreement. We have paid approximately $124 thousand in patent costs reimbursementSeaStar Medical since January 1, 2020. The UOM License Agreement also imposes certain diligence obligations on us2021. Mr. Barnett served as President, Chief Executive Officer and requires usBoard Member of Satellite Healthcare, Inc. from 2014 to achieve specified milestone events by a certain date. UnderFebruary 2021. Satellite Healthcare is Mr. Barnett has served as the UOM License Agreement, UOM’s liability is limited and we agreed to indemnify and hold UOM harmless in connection with the useChairman of the licensed technology and activities related to the products created using such licensed patents and/or technology. The UOM License Agreement will remain in effect, unless earlier terminated, until the latter of (i) the expiration of all licensed patents, (ii) the tenth anniversaryStrategic Planning Committee, as well as a member of the Effective Date (as defined therein) or (iii)Finance, Quality, Risk/Compliance, and Governance/Compensation committees for Satellite Healthcare, Inc. Mr. Barnett currently serves on the seventh anniversaryCutisCare, Inc. Board of Directors since 2021 and is a member of the dateStrategy and Audit Committee. CutisCare Inc. focuses on innovative approaches to wound care. Mr. Barnett has served a term as Chair of the First Commercial Sale (as defined therein). Either party may terminateBoard of Directors of the UOM License AgreementNational Kidney Foundation—Northern California, Pacific Northwest & NV Region, and a Board Member since 2018, where he served as a member of the Nominating, Strategic Partnerships, and Membership committees. He also served as Chair of the Board of Directors for the other party’s material breachWest Coast Sourcing Solutions, a product procurement company, from 2011 to 2014. From 2009 to 2014, Mr. Barnett served as a Senior Vice President of any covenant or promise therein that remains uncured for 90 days. We may also terminate the agreement by giving UOM 90-day advanced notice.

In addition to the co-owned patents and patent applications in Family 1, we also solely own four additional patent families (Families 2-5). Patent Family 2 includes one U.S. patent and one pending U.S. patent application directed toVHA, Inc., a second generation of the SCD cartridge and methods for using our SCD cartridge to process leukocytes. The patent will expire in 2032, and the application, if granted, will expire in 2031, assuming that the required maintenance fees are paid. Counterpart patents have been granted in Australia, Europe, and Japan with the European patent having been validated in France, Germany, Italy, Spain, and the United Kingdom, and a patent application is pending inpurchasing

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Canada. These patents,cooperative for community-owned, nonprofit healthcare institutions. From 2006 to 2008, Mr. Barnett served as General Partner & Board Member of North State Surgery Centers, LLC, an ambulatory surgical clinic center. From 2005 to 2009, Mr. Barnett served as Chair of the Board of Directors of the Hospital Council of Northern California—Northern Sierra Section, a non-profit hospital and health systems trade association.

Andres Lobo has served as a Director of SeaStar Medical since May 2019. Since 1994, Mr. Lobo has served in various roles at the Dow Chemical Company. At The Dow Chemical Company, since 2019, Mr. Lobo has served as the Risk Seeking Assets Director; from 2016 to 2019, Mr. Lobo served as the Corporate Real Estate Director; and from 2006 to 2016, Mr. Lobo served as a Customer Financial Services Portfolio Manager. At Dow Brasil S.A, a subsidiary of The Dow Chemical Company, from 2003 to 2006, Mr. Lobo served as a Senior Finance Manager; from 1999 to 2003, Mr. Lobo served as a Customer Financial Services Manager for Brazil and Latin America; from 1997 to 1999, Mr. Lobo served as a Customer Financial Services Manager for Argentina and Southern Cone; and from 1994 to 1997, Mr. Lobo served as a Credit & Collection Manager. From 1993 to 1994, Mr. Lobo served as a Corporate Account Manager at Leasing Andino S.A., a commercial leasing company, in Santiago, Chile.

Allan Collins, MD has served as a Director of SeaStar Medical since January 2021. Dr. Collins has served as the Chief Medical Officer at NxStage Medical, a medical device company for the treatment of kidneys since 2017. Since 1999, Dr. Collins has also served as the Executive Director of the Kidney Care Initiative at the Chronic Disease Research Group, a non-profit organization that focuses on answering questions on patient experiences with chronic diseases and a division of the Hennepin Healthcare Research Institute, in Minneapolis, Minnesota. From 1999 to 2014, Dr. Collins served as a Director within the United States Renal Data System, a national data system that analyzes information about chronic kidney disease. From 1990 to 2017, Dr. Collins worked for the Hennepin Faculty Associates, an independent medical group at the Hennepin County Medical Center in Minneapolis, Minnesota. From 1980 to 1990, Dr. Collins served as faculty at the Minneapolis Medical Research Foundation, a medical research non-profit organization, and the application, if granted, will expire in 2031, assuming that the required maintenance fees are paid. The patents and the application in Patent Family 2 are as follows:University of Minnesota School of Medicine.

Patent Family 2†Bruce Rodgers

Patent Family 3 includes one U.S. patent directedof its primary investors. As LMFA’s Chief Executive Officer, Mr. Rodgers has guided LMFA through its initial public offering, subsequent public offerings, and acquisitions of complementary businesses. Mr. Rodgers is a former business transactions attorney counseling numerous businesses with respect to methodsmergers, acquisitions and capital raising transactions. In this capacity, Mr. Rodgers was an associate of treating chronic heart failure usingMacfarlane, Ferguson, & McMullen, P.A. from 1991 to 1995 and a SCD cartridge, which will expirepartner from 1995-1998 and was an equity partner of Foley & Lardner LLP from 1998 to 2003. Originally from Bowling Green, Kentucky, Mr. Rodgers holds an Engineering degree from Vanderbilt University (1985) and a Juris Doctor, with honors, from the University of Florida (1991). Mr. Rodgers also served as an officer in 2032, assuming that the required maintenance fees are paid. A counterpart patent has been granted in Japan, that will expire in 2032, assuming thatUnited States Navy from 1985-1989 rising to the required maintenance fees are paid. The patentsrank of Lieutenant, Surface Warfare Officer. Mr. Rodgers is a member of the Florida Bar and applications in Patent Family 3 are as follows:holds an AV-Preeminent rating from Martindale Hubbell.

Patent Family 3†Richard Russell

Patent Family 4 includes two U.S. patents directed to methods of treating chronic heart failure and acute decompensated heart failure using a SCD cartridge. These patents will expire in 2032, assuming that the required maintenance fees are paid. Counterpart patents have been granted in Australia, and patent applications are pending in Canada and Europe. These patents, and patent applications, if granted, will expire in 2032, assuming that the required maintenance fees are paid. The patents and applications in Patent Family 4 are as follows:

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Patent Family 4†

Patent Family 5 includes three U.S. design patents, three European Community design patents,Accounting from the University of Alabama, a Bachelor of Arts in International Studies from the University of South Florida, and three United Kingdom design patents directeda Master’s in Business Administration from the University of Tampa. On March 1, 2020, Mr. Russell was appointed to the board of directors for TDNT, a medical device connector as follows:publicly held consumer products company that has been trading on the OTCQB Venture Market since April 2015. Mr. Russell was also Chairman of the Hillsborough County Internal Audit Committee from January 2020 to April 2021 and has been a board member since August 2016.

Patent Family 5

With respect to our other technologies, we solely own patents and patent applications in five additional patent families (Patent Families 6-10) which are summarized as follows:Executive Officers

Patent Family 6Eric Schlorff

– Directors”

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Patent Family 7

Patent Family 8

Patent Family 9

Patent Family 10

In addition to seeking patent protection, we also rely on trade secrets and other confidential information to protect aspects of our business that are not amenable to, or that we do not consider appropriate for, patent protection.

Competition

The industry for treating inflammation is extremely competitive, and companies developing new treatment procedures face significant capital and regulatory challenges. As our SCD product is a clinical-stage device, we have the additional challenge of establishing medical industry support, which will be driven by treatment data resulting from human clinical studies. Should our device become market cleared by the FDA or the regulatory body of another country, we may face significant competition from well-funded pharmaceutical and medical device companies. Additionally, we would likely need to establish large-scale production of our device in order to be competitive. We believe that our SCD is able to compete effectively in the market and we are not aware of any similar device that has completed regulatory approval in any country for the treatmentbiography of adults or children with acute kidney injury requiring continuous renal replacement therapy.

In bothEric Schlorff who serves as the United StatesChief Executive Officer and international markets, the use of medical devices is dependent in part on the availability of reimbursement from third-party payors, such as government and private insurance plans. Healthcare providers that use medical devices generally rely on third-party payors to pay for all or part of the costs and fees associated with the medical procedures being performed or to compensate them for their patient care services. Lack of third-party coverage and reimbursement for the Company’s devices could delay or limit their adoption, and as such harm our competitive advantage in the market.

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Sales and Marketing

While currently we do not have a significant sales and marketing capability, we are actively pursuing resources and support for commercialization efforts in anticipation of obtaining the relevant regulatory approval from the FDA, including for the HDE application for pediatric AKI indications that was submitted in June 2022. On December 29, 2022, we entered into a U.S. License and Distribution Agreement with Nuwellis, for the pediatric SCD that is under HDE review. We will leverage their existing sales team that has similar call points to those needed for the pediatric SCD. We intend to build or contract for medical education as well as clinical training and support.

Government Regulation

Our SCD product is subject to regulation by numerous regulatory bodies, primarily the FDA, and comparable international regulatory agencies. These agencies require manufacturers of medical devices to comply with applicable laws and regulations governing the development, testing, manufacturing, labeling, marketing, storage, distribution, advertising and promotion, and post-marketing surveillance reporting of medical devices. The SCD includes a system of cartridges to interact with the patient’s hyperinflammatory cells to allow them to become deactivated prior to their return to the patient. As the primary therapeutic mode of action of our SCD is attributable to the device’s impact on these autologous cells and their timely return to patients, FDA’s Center for Biological Evaluation and Research has primary jurisdiction over its premarket development, review and approval of our SCD as a medical device. Failure to comply with applicable requirements may subject a device and/or its manufacturer to a variety of administrative sanctions, such as issuance of warning letters, import detentions, mandatory safety notifications, repair/replace/refund actions, or recalls, civil monetary penalties and/or judicial sanctions, such as product seizures, injunctions and criminal prosecution.

FDA’s Pre-market Clearance and Approval Requirements

Each medical device we seek to commercially distribute in the United States will require either a prior 510(k) clearance, unless it is exempt, a de novo request or a PMA from the FDA. Generally, if a new device has a predicate that is already on the market under a 510(k) clearance, the FDA will allow that new device to be marketed under a 510(k) clearance; otherwise, a de novo or PMA is required. Medical devices are classified into one of three classes—Class I, Class II or Class III—depending on the degree of risk associated with each medical device and the extent of control needed to provide reasonable assurance of safety and effectiveness. Class I devices are deemed to be low risk and are subject to the general controls of the Federal Food, Drug, and Cosmetic Act ("FD&C Act"), such as provisions that relate to: adulteration; misbranding; registration and listing; notification, including repair, replacement, or refund; records and reports; and good manufacturing practices. Most Class I devices are classified as exempt from pre-market notification under section 510(k) of the FD&C Act, and therefore may be commercially distributed without obtaining 510(k) clearance from the FDA. Class II devices are subject to both general controls and special controls to provide reasonable assurance of safety and effectiveness. Special controls may include performance standards, post market surveillance, patient registries, and/or guidance documents. Most Class II devices require the manufacturer to submit to the FDA a pre-market notification requesting permission to commercially distribute the devices. Devices deemed by the FDA to pose the greatest risk, such as life-sustaining, life-supporting or implantable devices, are placed in Class III. In addition, novel devices that have not been previously classified by the FDA or that have deemed not substantially equivalent to a previously cleared 510(k) device are considered Class III by default, unless and until they are down-classified by the FDA (e.g., via the de novo request process). High risk devices formally classified as Class III by regulation or administrative order cannot be marketed in the U.S. unless the FDA approves the device after submission of a PMA. Novel devices that are Class III by default may be eligible for down-classification through the de novo request process, if the device manufacturer can demonstrate that the device is lower risk and should therefore be classified as Class I or Class II. The FDA can also impose post-market sales, marketing, or other restrictions on devices in order to assure that they are used in a safe and effective manner. We believe that SCD will be classified as a Class III deviceDirector.

Caryl Baron has served as the Finance Controller of SeaStar Medical since 2020 and as such will be subjectour Interim Chief Financial Officer since October 28, 2022. Since 2013, Ms. Baron has also served as the Founder of Baroness Financial Consulting, an accounting consulting firm, in New York, New York. From 2011 to PMA submission2013, Ms. Baron served as the Controller of Rubenstein Public Relations, Inc., a full-service communications agency, in New York, New York. From 2008 to 2010, Ms. Baron served as the Vice President and approval.Finance Director of Omnicon Health Group, a healthcare marketing and communications group, in New York, New York. From 2006 to 2008, Ms. Baron served as the Finance Manager of IMG, a global sports, events and talent management company, in New York, New York. From 2004 to 2006, Ms. Baron served as the Controller of Cornelia Day Resort, a luxury spa, in New York, New York. From 1996 to 2004, Ms. Baron served as the Financial Operations Manager of Tiffany & Co., a luxury jewelry and specialty retailer, in New York, New York. From 1992 to 1996, Ms. Baron served as the Assistant Controller for WPP, a multinational communications, advertising, public relations, and technology company, in New York, New York.

Kevin Chung, MD has served as the Chief Medical Officer of SeaStar Medical since July 1, 2022. Dr. Chung served as a professor in the Department of Medicine at the Uniformed Services University of the Health Sciences from 2016 to 2022, and as Chair of the Department of Medicine since 2018. From 2014 to 2020, Dr. Chung served as Critical Care Consultant to the U.S. Surgeon General. From 2016 to 2018, Dr. Chung served as Department of Medicine Chief at the Brooke Army Medical Center. From 2015 to 2016, Dr. Chung served as Director of Research at the US Army Institute of Surgical Research, and as Task Area Manager, Clinical Trial from 2012 to 2015. From 2006 to 2013, Dr. Chung served as Medical Director, Burn Intensive Care Unit at the US Army Burn Center. Dr. Chung is a retired army colonel and holds medical licenses in Texas and Maryland.

Family Relationships

There are no family relationships among any of the individuals who serve as our directors or executive officers.

Classified Board of Directors

In accordance with the Orphan Drug ActCharter, our Board is divided into three classes with only one class of 1984, a rare disease is defined as a disease or condition that affects fewer than 200,000 people in the U.S. Currently, in the U.S., only a portiondirectors being elected at each annual meeting of the 7,000 known rare diseases have approved treatments. By definition, rare diseasesstockholders and each director serving a three-year term. Each of our Class I Directors has a term that expires at the next annual meeting of stockholders following the effectiveness of the Charter, each of our Class II Directors has a term that expires at the second annual meeting of stockholders following the effectiveness of the Charter and each of our Class III Directors has a term that expires at the third annual meeting of stockholders following the effectiveness of the Charter, or, conditions occur in each case, when their respective successors are elected and qualified, or upon their earlier death, resignation, retirement or removal. As discussed above, Andre Lobo and Rick Barnett serve as Class I Directors, Bruce Rodgers, Richard Russell and Alan Collins serve as Class II Directors and Eric Schlorff and Kenneth Van Heel serve as Class III Directors.

Director Independence

In connection with the consummation of the Business Combination, the Board determined that each of the directors, other than Mr. Schlorff, qualify as an independent director, as defined under the listing rules of Nasdaq, and our Board will consist of a small numbermajority of patients. As a result, it has“independent directors,” as defined under the rules of the SEC and Nasdaq listing

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been difficultrules relating to gather enough clinical evidencedirector independence requirements. In addition, we are subject to meet the FDA standardrules of reasonable assurancethe SEC and Nasdaq relating to the membership, qualifications, and operations of safetythe audit committee, as discussed below.

Committees of the Board of Directors

The Company’s Board will direct the management of its business and effectiveness.affairs, as provided by Delaware law, and will conduct its business through meetings of the Board and its standing committees. The Company will have a standing audit committee, compensation committee, and nominating and corporate governance committee, each of which will operate under a written charter.

In orderaddition, from time to time, special committees may be established under the direction of the Company’s Board when it deems it necessary or advisable to address specific issues. Current copies of the Company’s committee charters will be available on the Company’s website as required by applicable SEC and Nasdaq rules. The information on or available through such website is not deemed incorporated in this challenge, Congress included a provision in the Safe Medical Devices ActAnnual Report and does not form part of 1990 to create a new regulatory pathway for products intended for diseases or conditions that affect small (i.e., rare) populations, which is the Human Device Exemption program.this Annual Report.

A Humanitarian Use Device ("HUD") is a medical device intended to benefit patients in the treatment or diagnosis of a disease or condition that affects or is manifested in not more than 8,000 individuals in the U.S. per year.Audit Committee

The HDE is a marketing applicationOur audit committee will be responsible for, an HUD under Section 520(m) of the FD&C Act. An HDE is exempt from the effectiveness requirements of Sections 514 and 515 of the FD&C Act and is subject to certain profit and use restrictions.

Under section 520(m)(6)(A)(i) of the FD&C Act, an HUD is only eligible to be sold for profit after receiving an HDE approval if the device is intended for the treatment or diagnosis of a disease or condition that either:among other things:

HDE applicants whose devices meet one of the eligibility criteria and wish to sell their HUD for profit should provide adequate supporting documentation to FDA in the original HDE application. HDE holders who wish to sell their devices for profit and who did not submit the request in the original HDE application may submit a supplement and provide adequate supporting documentation to demonstrate that the HUD meets the eligibility criteria.

The number of HDE devices that may be sold for profit is limited to a quantity known as the Annual Distribution Number (“ADN”). If the FDA determines that an HDE holder is eligible to sell the device for profit, the FDA will determine the ADN and notify the HDE holder.

The ADN is calculated by taking the number of devices reasonably necessary to treat or diagnose an individual per year and multiplying it by 8000. For example, if the typical course of treatment using an HDE device, in accordance with its intended use, requires the use of two devices per patient per year, then the ADN for that HDE device would be 16,000 (i.e., 2 x 8000).

If the number of devices distributed in a year exceeds the ADN, the sponsor can continue to sell the device but cannot earn a profit for the remainder of the year.

We believe our SCD will be eligible to sell for a profit because we are pursuing an HDE for the pediatric population.

Pre-market Approval Pathway

A pre-market approval application must be submitted to the FDA for Class III devices for which the FDA has required a PMA. The pre-market approval application process is more extensive than the 510(k)-pre-market notification and de novo request processes. A PMA application must be supported by extensive data, including but not limited to technical, preclinical, clinical trials, manufacturing and labeling to demonstrate to the FDA’s satisfaction reasonable evidence of safetyadequacy and effectiveness of our accounting and internal controls over financial reporting, disclosure controls and policies and procedures;