Siltuximab

– Reported positive topline results from the ongoing Phase 2 TRANQUILITY trial of pacibekitug in May 2025, demonstrating rapid, deep, and durable reductions in high-sensitivity C-reactive protein with quarterly dosing – — Additional data from the ongoing Phase 2 TRANQUILITY trial to be presented at the European Society of Cardiology Congress in August 2025 – – On track to initiate Phase 2 proof-of-concept trial in abdominal aortic aneurysm in the second half of 2025 – – Planning underway for a Phase 3 cardiovascular outcomes trial in atherosclerotic cardiovascular disease – – Cash, cash equivalents, and investments of $256.4 million as of June 30, 2025, provide expected cash runway into the second half of 2027 – NEW YORK, Aug. 13, 2025 (GLOBE NEWSWIRE) -- Tourmaline Bio, Inc. (Tourmaline) (NASDAQ: TRML), a late-stage clinical biotechnology company developing transformative medicines to dramatically improve the lives of patients with life-altering immune and inflammatory diseases, today announced its financial results for the second quarter of 2025 and outlined recent business highlights. “The second quarter of 2025 was a transformative period for Tourmaline, with our first data readout for pacibekitug,” said Sandeep Kulkarni, MD, Co-Founder and Chief Executive Officer of Tourmaline. “We are extremely pleased with the topline results from the ongoing Phase 2 TRANQUILITY trial, which have unlocked pacibekitug’s best-in-class potential by demonstrating the viability of quarterly subcutaneous administration. With these results in hand, we look forward to advancing pacibekitug into the next stage of development within cardiovascular inflammation, including the planned initiation of our Phase 2 proof-of-concept trial in abdominal aortic aneurysm in the second half of 2025.” Cardiovascular Inflammation Highlights: TRANQUILITY Topline Results On May 20, 2025, Tourmaline announced positive topline results from the ongoing Phase 2 TRANQUILITY trial, which evaluates quarterly and monthly subcutaneous dosing of pacibekitug in patients with elevated high-sensitivity C-reactive protein (hs-CRP) and chronic kidney disease. The press release related to these topline results can be found here, and a replay of the related webcast can be accessed here.In the TRANQUILITY trial, rapid, deep, and durable reductions in hs-CRP through Day 90 were achieved across all pacibekitug arms with high statistical significance as compared to placebo (p<0.0001 for all arms).Based upon these results, pacibekitug is the first and only IL-6 inhibitor known to demonstrate deep hs-CRP reductions with quarterly dosing in a clinical trial, achieving >85% hs-CRP reductions from baseline in the 50 mg quarterly arm after only a single dose.The overall incidence rates of adverse events and serious adverse events in the pacibekitug groups of the TRANQUILITY trial were comparable to placebo through the data extract date of April 23, 2025. A more complete discussion of the safety data observed in the ongoing TRANQUILITY trial can be found in the topline results press release referenced above and available here. Ongoing Development Activities The TRANQUILITY trial is the starting point of Tourmaline’s clinical development program for pacibekitug for the potential treatment of atherosclerotic cardiovascular disease (ASCVD) and other inflammation-driven cardiovascular diseases. Tourmaline continues to make progress in planning for a Phase 3 cardiovascular outcomes trial in ASCVD.Tourmaline completed a successful pre-IND interaction with the U.S. Food and Drug Administration in the second quarter of 2025 and has reached alignment with the agency on Tourmaline’s plans to conduct a Phase 2 proof-of-concept trial in abdominal aortic aneurysm (AAA), including the design of the study and the use of multi-modality imaging. Tourmaline remains on track to initiate this planned Phase 2 proof-of-concept trial in AAA in the second half of 2025. Presentations and Publications At the European Society of Cardiology (ESC) Congress in Madrid, Spain, Tourmaline will present additional data related to the ongoing TRANQUILITY trial in a poster presentation entitled “A Multicenter, Randomized, Double-Blind, Placebo-Controlled Ph2 Trial of Pacibekitug SC Quarterly or Monthly in Patients with Elevated hs-CRP and Chronic Kidney Disease: TRANQUILITY 90-Day Results”. This poster will be presented on August 31, 2025, by Dr. Deepak L. Bhatt, Director of the Mount Sinai Fuster Heart Hospital, the Dr. Valentin Fuster Professor of Cardiovascular Medicine at the Icahn School of Medicine at Mount Sinai in New York, and Chair of Tourmaline’s Cardiovascular Scientific Advisory Board (for which he is compensated).Emil deGoma, MD, Tourmaline’s SVP of Medical Research, and John Walsh, MD, Tourmaline’s Vice President, Head of Medical Affairs, were contributing authors on a review manuscript entitled “Human Genetics Informing Drug Development in Cardiovascular Disease: Interleukin-6 Signaling as a Case Study” that was published in the August 2025 issue of Circulation: Genomic and Precision Medicine. Thyroid Eye Disease (TED) Highlights: In May 2025, representatives from Tourmaline presented a poster entitled “Prevalence of Thyroid Eye Disease (TED) in the United States” at the Association for Research in Vision and Ophthalmology (ARVO) Annual Conference held in Salt Lake City, Utah.The Phase 2b spiriTED trial remains ongoing, and Tourmaline expects to report topline data from this trial in early 2026.Tourmaline expects to provide additional information on its future development plans in TED after review of data from the Phase 2b spiriTED trial. Second Quarter 2025 Financial Results: Cash Position Cash, cash equivalents, and investments were $256.4 million as of June 30, 2025, as compared to $294.9 million as of December 31, 2024. Tourmaline anticipates that its current cash, cash equivalents, and investments will provide cash runway into the second half of 2027, funding its operations through key pacibekitug data readouts in cardiovascular inflammation and TED, as well as other pacibekitug development activities. Operating Expenses Research and development expenses were $19.6 million for the second quarter of 2025, as compared to $15.7 million for the second quarter of 2024. The increase in research and development expenses was primarily driven by increased clinical trial expenses directly related to the TRANQUILITY and spiriTED trials, increased routine toxicology study expenses, increased employee compensation costs attributable to additional headcount, and increased consulting expenses, partially offset by decreased chemistry, manufacturing, and controls expenses.General and administrative expenses were $6.3 million for the second quarter of 2025, as compared to $6.2 million for the second quarter of 2024. The slight increase in general and administrative expenses was primarily driven by increased employee compensation costs, partially offset by decreased consulting expenses. Net Loss Net loss was $23.1 million for the second quarter of 2025, resulting in a basic and diluted net loss per share of $0.90. Net loss was $17.5 million for the second quarter of 2024, resulting in basic and diluted net loss per share of $0.68.The increase in both net loss and net loss per share was attributable to increased operating expenses and Tourmaline’s overall growth from 2024 to 2025. About Tourmaline Bio: Tourmaline is a late-stage clinical biotechnology company driven by its mission to develop transformative medicines that dramatically improve the lives of patients with life-altering immune and inflammatory diseases. Tourmaline’s lead asset is pacibekitug. For more information, please visit https://www.tourmalinebio.com/ and follow us on LinkedIn, X, and Bluesky. About Pacibekitug: Pacibekitug is a long-acting, fully-human, anti-IL-6 monoclonal antibody with best-in-class potential and differentiated properties, including a naturally long half-life, low immunogenicity, and high binding affinity to IL-6. Excluding ongoing trials, pacibekitug was previously studied in approximately 450 participants, including patients with autoimmune disorders, across six completed clinical trials. Tourmaline is currently developing pacibekitug in atherosclerotic cardiovascular disease (ASCVD) and thyroid eye disease (TED) as its first two indications, with plans to expand into abdominal aortic aneurysm (AAA) and additional diseases in the future. Cautionary Note Regarding Forward-Looking Statements: Any statements contained in this press release that do not describe historical facts may constitute forward-looking statements as that term is defined in the Private Securities Litigation Reform Act of 1995. These statements may be identified by words and phrases such as “believe,” “designed to,” “expect,” “may,” “plan,” “potential,” “will” and similar expressions, and are based on Tourmaline’s current beliefs and expectations. These forward-looking statements include expectations regarding the development and potential therapeutic benefits of pacibekitug, including pacibekitug’s best-in-class potential; the timing of initiation, progress and results of Tourmaline’s current and future clinical trials for pacibekitug, including reporting of data therefrom; the timing of Phase 3 clinical trial readiness; the timing and potential to expand pacibekitug into additional indications; and Tourmaline’s anticipated cash runway. These statements involve risks and uncertainties that could cause actual results to differ materially from those reflected in such statements. Risks and uncertainties that may cause actual results to differ materially include uncertainties inherent in the development of therapeutic product candidates, such as the risk that any one or more of Tourmaline’s current or future product candidates will not be successfully developed or commercialized; the risk of delay or cessation of any planned clinical trials of Tourmaline’s current or future product candidates; the risk that prior results, such as signals of safety, activity or durability of effect, observed from preclinical trials, will not be replicated or will not continue in ongoing or future studies or clinical trials involving Tourmaline’s current or future product candidates; the risk that genetic evidence or modeling data indicating the therapeutic potential of IL-6 inhibition, or clinical evidence from other drug candidates targeting IL-6, will not be replicated in ongoing or future studies or clinical trials involving Tourmaline’s current or future product candidates; the risk that Tourmaline’s current or future product candidates or procedures in connection with the administration thereof will not have the safety or efficacy profile that Tourmaline anticipates; risks regarding the accuracy of Tourmaline’s estimates of expenses, capital requirements and needs for additional financing; changes in expected or existing competition; changes in the regulatory environment; the uncertainties and timing of the regulatory approval process; unexpected litigation or other disputes; the impacts of macroeconomic conditions on Tourmaline’s business, clinical trials and financial position; and other risks and uncertainties that are described in Tourmaline’s Quarterly Report on Form 10-Q filed with the U.S. Securities and Exchange Commission (SEC) on August 13, 2025 and other filings that Tourmaline makes with the SEC from time to time. Any forward-looking statements speak only as of the date of this press release and are based on information available to Tourmaline as of the date hereof, and Tourmaline assumes no obligation to, and does not intend to, update any forward-looking statements, whether as a result of new information, future events or otherwise. Tourmaline Bio, Inc.Condensed Consolidated Statements of Operations (unaudited)(amounts in thousands, except per share data) Three Months EndedJune 30, Six Months Ended June 30, 2025 2024 2025 2024 Operating expenses: Research and development$19,634 $15,734 $39,892 $27,110 General and administrative 6,340 6,237 12,313 12,378 Total operating expenses 25,974 21,971 52,205 39,488 Loss from operations (25,974) (21,971) (52,205) (39,488)Other income, net 2,882 4,484 6,143 8,690 Net loss$(23,092) $(17,487) $(46,062) $(30,798)Net loss per share, basic and diluted$(0.90) $(0.68) $(1.79) $(1.24)Weighted-average common shares outstanding, basic and diluted 25,755 25,724 25,723 24,908 Tourmaline Bio, Inc.Selected Condensed Consolidated Balance Sheet Data (unaudited)(amounts in thousands) June 30, December 31, 2025 2024Cash, cash equivalents and investments$256,418 $294,936Working capital$239,006 $259,933Total assets$269,295 $309,001Total stockholders’ equity$259,192 $300,052 Media Contact:Scient PR Sarah Mishek SMishek@ScientPR.com Investor Contact:Meru AdvisorsLee M. Sternlstern@meruadvisors.com

– Rapid, deep, and durable reductions in high-sensitivity C-reactive protein (hs-CRP) through Day 90 achieved across all pacibekitug arms with high statistical significance as compared to placebo (p<0.0001 for all arms) – – Pacibekitug becomes the first and only IL-6 inhibitor known to demonstrate deep hs-CRP reductions with quarterly dosing in a clinical trial, achieving >85% hs-CRP reductions from baseline in the 50 mg quarterly arm – – Overall incidence rates of adverse events and serious adverse events in the pacibekitug groups were comparable to placebo through the data extract date – – Results from TRANQUILITY support the advancement of pacibekitug into a potential Phase 3 cardiovascular outcomes trial in atherosclerotic cardiovascular disease and a planned Phase 2 proof-of-concept trial in abdominal aortic aneurysm – – Conference call and webcast to be held today, May 20 at 8:30 a.m. ET – NEW YORK, May 20, 2025 (GLOBE NEWSWIRE) -- Tourmaline Bio, Inc. (Tourmaline) (NASDAQ: TRML), a late-stage clinical biotechnology company developing transformative medicines to dramatically improve the lives of patients with life-altering immune and inflammatory diseases, today announced positive topline results from its ongoing Phase 2 TRANQUILITY trial evaluating quarterly and monthly subcutaneous dosing of pacibekitug in patients with elevated high-sensitivity C-reactive protein (hs-CRP), a biomarker associated with elevated cardiovascular risk, and chronic kidney disease (CKD). The TRANQUILITY trial is the starting point of Tourmaline’s clinical development program for pacibekitug for the potential treatment of atherosclerotic cardiovascular disease (ASCVD) and other cardiovascular diseases. “We are thrilled with the data emerging from the TRANQUILITY trial and the remarkable consistency of signal across all endpoints evaluated. All active arms achieved rapid, deep, and durable reductions in hs-CRP, and overall incidence rates of adverse events and serious adverse events were comparable between pacibekitug and placebo. Importantly, this is the first time that pacibekitug or any IL-6 inhibitor has been tested in a clinical trial with quarterly dosing. It is well-recognized that less frequent administration has the potential to enhance patient adherence and ultimate clinical benefit,” said Sandeep Kulkarni, MD, Co-Founder and Chief Executive Officer of Tourmaline. “Given the strength of the data, we look forward to accelerating development of pacibekitug within atherosclerotic cardiovascular disease and abdominal aortic aneurysm. We anticipate sharing additional data from the TRANQUILITY trial at an upcoming medical conference.” “There is strong evidence suggesting that elevated levels of high-sensitivity C-reaction protein (hs-CRP) are a predictor of increased cardiovascular risk, and quarterly subcutaneous administration of pacibekitug in the TRANQUILITY trial demonstrated large and significant reductions in hs-CRP levels through Day 90,” said Dr. Deepak L. Bhatt, Director of the Mount Sinai Fuster Heart Hospital, the Dr. Valentin Fuster Professor of Cardiovascular Medicine at the Icahn School of Medicine at Mount Sinai in New York, and Chair of Tourmaline’s Cardiovascular Scientific Advisory Board (for which he is compensated). “Based upon these results, pacibekitug merits testing in future Phase 3 trials for cardiovascular risk reduction.” TRANQUILITY Topline Results: TRANQUILITY Trial Design TRANQUILITY (NCT06362759) is a multicenter, randomized, double-blind, placebo-controlled Phase 2 trial in patients with elevated hs-CRP and CKD stage 3 or 4. Participants were stratified by CKD stage and randomly assigned to receive subcutaneously administered pacibekitug 25 mg quarterly, 50 mg quarterly, or 15 mg monthly, or placebo, for a treatment period of 6 months. Participants are then followed for a period of 6 additional months. The prespecified primary endpoint of the TRANQUILITY trial is median time-averaged percent change in hs-CRP through Day 90, adjusting for baseline hs-CRP levels. The key secondary endpoint is the percentage of participants achieving time-averaged hs-CRP below 2 mg/L through Day 90. Additional prespecified endpoints include the aforementioned hs-CRP endpoints at Day 90 (i.e., using single-timepoint analyses) as well as the percentage of participants achieving hs-CRP reductions of 50% or greater. The prespecified primary analysis population includes participants who entered the study with a baseline hs-CRP of at least 1.9 mg/L (calculated as the average of Screening and Day 1 values), had at least one post-baseline hs-CRP assessment, and received all planned study drug doses during the primary evaluation period. The data in this analysis reflect a data extract date of April 23, 2025 from the ongoing trial. TRANQUILITY Baseline CharacteristicsA total of 143 participants were enrolled in the TRANQUILITY trial. Of this total, 126 participants comprised the primary analysis population. Baseline characteristics were generally balanced between groups. Key baseline characteristics of the primary analysis population are as follows: PacibekitugPlacebon=3125 mg quarterlyn=3150 mg quarterlyn=3015 mg monthlyn=34Age, years72 (62, 77)73 (66, 76)70 (61, 78)65 (60, 73)Female21 (68%)17 (55%)19 (63%)21 (62%)ASCVD15 (48%)16 (52%)20 (67%)7 (21%)Diabetes21 (68%)16 (52%)20 (67%)19 (56%)Body-mass index, kg/m233.4 (29.7, 36.3)32.2 (28.1, 35.6)35.1 (30.7, 39.8)33.4 (30.2, 36.3)eGFR, mL/min/1.73m243.5 (33.5, 53.0)37.5 (33.0, 47.0)48.0 (36.5, 56.5)42.5 (36.0, 57.0)IL-6, pg/mL4.91 (3.32, 5.93)4.62 (2.87, 7.30)5.56 (3.58, 10.03)4.86 (2.39, 7.83)hs-CRP, mg/L3.60 (2.70, 5.10)3.90 (2.35, 5.55)5.18 (3.60, 7.35)4.73 (3.80, 7.40) Data provided are median (interquartile range) or n (%). eGFR: estimated glomerular filtration rate. TRANQUILITY Pharmacodynamic DataKey pharmacodynamic data for the primary analysis population are as follows (p<0.0001 for all comparisons to placebo): PacibekitugPlacebon=3125 mg quarterlyn=3150 mg quarterlyn=3015 mg monthlyn=34Change from baseline analyses:Median time-averaged percent reduction in hs-CRP through Day 90 (primary endpoint)15%75%86%85%Median percent reduction in hs-CRP at Day 9012%70%85%89%Responder rate analyses:Percentage of participants achieving time-averaged hs-CRP < 2 mg/L through Day 9026%81%80%88%Percentage of participants achieving hs-CRP < 2 mg/L at Day 9013%77%83%88%Percentage of participants achieving time-averaged hs-CRP reduction >= 50% through Day 9019%81%87%94%Percentage of participants achieving hs-CRP reduction >= 50% at Day 9016%81%90%91% Results of post-hoc sensitivity analyses of the primary endpoint in the intention-to-treat (ITT) population, i.e., all randomized participants, were highly consistent with the primary analyses above. TRANQUILITY Safety DataAs of the data extract date, the cumulative incidence of any adverse event (AE) was 54% in the pooled pacibekitug group, compared with 56% in the placebo group. The most common AEs in the pooled pacibekitug group, defined as those occurring in at least 3 pacibekitug-treated participants, were urinary tract infection (4%), COVID-19 (3%), dizziness (3%), and viral upper respiratory tract infection (3%). The majority of AEs were mild or moderate in severity and were single occurrences in one participant each. The overall incidence of any serious adverse event (SAE) was 10% in the pooled pacibekitug group versus 11% in the placebo group. Incidence rates of infection (24% vs 22%) and serious infection (4% vs 3%) were similar in the pooled pacibekitug group compared with the placebo group. There was no increase in AE incidence with higher pacibekitug doses. There was one death, a fatal case of COVID-19, that occurred in the 25 mg quarterly arm. There were no Grade 2 or higher injection site reactions. There were no cases of confirmed Grade 3 or higher neutropenia and no cases of confirmed Grade 2 or higher thrombocytopenia. No clinically meaningful median percent changes in LDL cholesterol, triglycerides, or total cholesterol to HDL cholesterol ratio were observed in pacibekitug arms compared to placebo. Cumulative safety data from the TRANQUILITY trial as of the data extract date are as follows: PacibekitugPlacebon=36Pooledn=10525 mg quarterlyn=3550 mg quarterlyn=3515 mg monthlyn=35AEs 20 (56%)57 (54%)20 (57%)18 (51%)19 (54%)SAEs 4 (11%)10 (10%)6 (17%)2 (6%)2 (6%)AEs leading to discontinuation02 (2%)01 (3%)1 (3%)Infection8 (22%)25 (24%)10 (29%)9 (26%)6 (17%)Serious infection 1 (3%)4 (4%)4 (11%)00Death01 (1%)*1 (3%)*00Injection site reaction Grade 2+00000Neutropenia Grade 21 (3%)2 (2%)1 (3%)01 (3%)Neutropenia Grade 3+ 00000Thrombocytopenia Grade 2+ 00000 Safety analysis population n=141.*: Fatal case of COVID-19. Future Development Plans for Pacibekitug in Cardiovascular Inflammation:Tourmaline continues to make progress in advancing the clinical development strategy for pacibekitug in cardiovascular inflammation and assessing potential Phase 3 trial designs in patients with ASCVD. Tourmaline expects to provide further information on a potential Phase 3 cardiovascular outcomes trial in ASCVD later in 2025 following discussions with regulatory authorities. Additionally, Tourmaline plans to initiate a Phase 2 proof-of-concept trial in patients with abdominal aortic aneurysm (AAA) in the second half of 2025. AAA is a common, serious vascular condition characterized by weakening and progressive enlargement of the abdominal aorta that can result in rupture and death. There is no approved medical therapy to slow or halt the growth of AAA. IL-6-driven inflammation is considered a critical mechanism promoting aneurysm expansion. The therapeutic potential of IL-6 inhibition for the treatment of AAA is supported by human genetic studies, epidemiological evidence, and mouse models of AAA. “Both monthly and quarterly dosing of pacibekitug achieved significant, rapid, and sustained IL-6 pathway inhibition, as shown by robust reductions in hs-CRP in TRANQUILITY. We are excited to advance the development of pacibekitug to address significant unmet needs of patients with high-risk cardiovascular diseases driven by inflammation, including ASCVD and AAA,” said Emil deGoma, MD, Senior Vice President of Medical Research at Tourmaline. Conference Call and Webcast Information:Tourmaline will host a live conference call and webcast to discuss these results beginning at 8:30 a.m. ET today, May 20, 2025. Members of Tourmaline management will be joined by Dr. Deepak L. Bhatt, Director of the Mount Sinai Fuster Heart Hospital and the Dr. Valentin Fuster Professor of Cardiovascular Medicine at the Icahn School of Medicine at Mount Sinai in New York. Dr. Bhatt also serves as the Chair of Tourmaline’s Cardiovascular Scientific Advisory Board (for which he is compensated). To register for this event, please click here or visit the Events and Presentations section of Tourmaline’s website. A replay of the event will be available on Tourmaline’s website following the event. It is recommended that participants register at least 15 minutes in advance of the event. About Tourmaline Bio:Tourmaline is a late-stage clinical biotechnology company driven by its mission to develop transformative medicines that dramatically improve the lives of patients with life-altering immune and inflammatory diseases. Tourmaline’s lead asset is pacibekitug. For more information about Tourmaline Bio and pacibekitug, please visit https://www.tourmalinebio.com or follow us on LinkedIn or X. About Pacibekitug:Pacibekitug is a long-acting, fully-human, anti-IL-6 monoclonal antibody with best-in-class potential and differentiated properties including a naturally long half-life, low immunogenicity, and high binding affinity to IL-6. Excluding ongoing trials, pacibekitug was previously studied in approximately 450 participants, including patients with autoimmune disorders, across six completed clinical trials. Tourmaline is currently developing pacibekitug in atherosclerotic cardiovascular disease (ASCVD) and thyroid eye disease (TED) as its first two indications, with plans to expand into abdominal aortic aneurysm (AAA) and additional diseases in the future. Cautionary Note Regarding Forward-Looking Statements:Any statements contained in this press release that do not describe historical facts may constitute forward-looking statements as that term is defined in the Private Securities Litigation Reform Act of 1995. These statements may be identified by words and phrases such as “believe,” “designed to,” “expect,” “may,” “plan,” “potential,” “will” and similar expressions, and are based on Tourmaline’s current beliefs and expectations. These forward-looking statements include expectations regarding the development and potential therapeutic benefits of pacibekitug, including the potential best-in-class profile of pacibekitug and the anticipated progression of pacibekitug into future clinical trials; the timing of initiation, progress and results of Tourmaline’s current and future clinical trials for pacibekitug, including the timing of a planned Phase 2 proof-of-concept clinical trial in patients with AAA and of Phase 3 clinical trial readiness in ASCVD, as well as reporting of data therefrom and additional details regarding the planning thereof; the timing of future announcements regarding Tourmaline’s development plans and the content of such announcements; the timing and likelihood of seeking regulatory approval for Tourmaline’s product candidates, including pacibekitug; the unmet need in Tourmaline’s target indications and the potential for pacibekitug to address such unmet need; and the timing and potential to expand pacibekitug into additional indications. These statements involve risks and uncertainties that could cause actual results to differ materially from those reflected in such statements. Risks and uncertainties that may cause actual results to differ materially include additional safety events occurring after the data extract date of April 23, 2025, as participants complete their trial visits and follow-up throughout the course of the trial; a review of the full dataset (including the post-April 23, 2025 dataset), after the trial has completed, which may cause our analysis following completion of the trial to differ from the analysis as of the data extract date presented above; uncertainties inherent in the development of therapeutic product candidates, such as the risk that any one or more of Tourmaline’s current or future product candidates will not be successfully developed or commercialized; the risk of delay or cessation of any planned clinical trials of Tourmaline’s current or future product candidates; the risk that prior results, such as signals of safety, activity or durability of effect, observed from preclinical trials and clinical trials, will not be replicated or will not continue in ongoing or future studies or clinical trials involving Tourmaline’s current or future product candidates and/or current or future target indications; the risk that Tourmaline’s current or future product candidates or procedures in connection with the administration thereof will not have the safety or efficacy profile that Tourmaline anticipates; risks regarding the accuracy of Tourmaline’s estimates of expenses, capital requirements and needs for additional financing; changes in expected or existing competition; changes in the regulatory environment; the uncertainties and timing of the regulatory approval process; unexpected litigation or other disputes; the impacts of macroeconomic conditions on Tourmaline’s business, clinical trials and financial position; and other risks and uncertainties that are described in Tourmaline’s Quarterly Report on Form 10-Q filed with the U.S. Securities and Exchange Commission (“SEC”) on May 2, 2025 and other filings that Tourmaline makes with the SEC from time to time. Any forward-looking statements speak only as of the date of this press release and are based on information available to Tourmaline as of the date hereof, and Tourmaline assumes no obligation to, and does not intend to, update any forward-looking statements, whether as a result of new information, future events or otherwise. Media Contact:Scient PRSarah MishekSMishek@ScientPR.com Investor Contact:Meru AdvisorsLee M. Sternlstern@meruadvisors.com A photo accompanying this announcement is available at https://www.globenewswire.com/NewsRoom/AttachmentNg/b1cc4485-af32-46c2-9fdb-144f4e1e573f