PRTC News & Events

PureTech Health announced that it has notified Nasdaq of its intention to voluntarily delist its American depositary shares, each representing the right to receive 10 ordinary shares of the company. Following the effectiveness of the delisting, PureTech's ordinary shares will remain listed on the London Stock Exchange, which will continue to serve as the company's primary trading venue. Following a review of the company's listing structure and shareholder trading patterns, the board of directors determined that maintaining a dual listing is no longer necessary. The substantial majority of trading volume, liquidity, and price discovery for PureTech's shares occurs on the LSE, and the majority of the company's current investor base as well as the company's governance framework are centered in the United Kingdom. Following the delisting, and until such time as PureTech may consider terminating its American depositary receipt program, PureTech expects its ADSs to be quoted and traded on the over-the-counter market via a sponsored Level 1 ADR program. No action is required to be taken by ADS holders at this time.

PureTech Health announced positive topline data from the completed Phase 1b clinical trial of LYT-200, a fully human anti-galectin-9 monoclonal antibody, in heavily pretreated patients with relapsed/refractory high-risk myelodysplastic syndrome and R/R acute myeloid leukemia. Based on the results, PureTech's Founded Entity, Gallop Oncology, has selected a recommended Phase 2 dose and intends to engage with the U.S. Food and Drug Administration to discuss the design of a subsequent trial that could potentially support registration of LYT-200 in R/R HR-MDS.

PureTech Health announced the publication of results from the Phase 2b ELEVATE IPF trial of deupirfenidone for the potential treatment of idiopathic pulmonary fibrosis in The American Journal of Respiratory and Critical Care Medicine. The results from this trial informed the design of the upcoming Phase 3 SURPASS-IPF trial, which will evaluate deupirfenidone 825 mg three times a day monotherapy as compared to pirfenidone 801 mg TID monotherapy, in a head-to-head study powered to test for superiority. PureTech's Founded Entity, Celea Therapeutics, is working to complete a financing to enable the initiation of the Phase 3 SURPASS-IPF trial in the first half of 2026. Highlights from the publication have been presented in various scientific forums throughout the course of 2025 and include: Primary and key secondary endpoints achieved: Deupirfenidone demonstrated a 98.5% and 99.6% posterior probability of superiority vs. placebo in slowing forced vital capacity and forced vital capacity percent predicted decline, respectively, at 26 weeks based on the prespecified Bayesian analysis. Statistically significant and clinically meaningful preservation of lung function: Deupirfenidone 825 mg TID as a monotherapy significantly slowed lung function decline versus placebo at 26 weeks as measured by mean FVC. A secondary analysis of FVCpp also showed a statistically significant benefit. Lung function decline approached the range expected with healthy aging: In the deupirfenidone 825 mg TID arm, the rate of FVC decline over 26 weeks approached the normal physiological decline expected in healthy older adults. Although not included in the publication, data from the ongoing Phase 2b ELEVATE IPF open-label extension show that this treatment effect was maintained out to at least 52 weeks, with participants experiencing a decline in FVC of -32.8 mL3. This is also similar to the expected natural decline in lung function in healthy older adults over that time. Delay in disease progression: Time to IPF progression, defined as an absolute decline in FVCpp of greater than or equal to5% or death through 26 weeks, was significantly delayed in patients receiving deupirfenidone 825 mg TID compared with placebo. Greater drug exposure without sacrificing tolerability: Pharmacokinetic data show that deupirfenidone 825 mg TID results in an approximately 50% greater drug exposure compared to pirfenidone 801 mg TID. Importantly, the overall incidence of adverse events with deupirfenidone 825 mg TID was similar to that of pirfenidone 801 mg TID, and AEs were generally mild to moderate. The percentage of patients who remained on deupirfenidone 825 mg TID for 26 weeks was similar to the percentage of patients remaining on placebo. Taken together, these data suggest that the higher exposure and improved efficacy observed with deupirfenidone 825 mg TID were achieved without sacrificing tolerability.

PureTech Health notes that its Founded Entity, Seaport Therapeutics, announced topline data from portions of its ongoing Phase 1 proof-of-concept clinical trial evaluating GlyphAgo. GlyphAgo is a novel, Glyphed oral prodrug of agomelatine in development for generalized anxiety disorder and the second clinical-stage candidate from Seaport's pipeline. Based on the data, Seaport announced plans to advance GlyphAgo into two parallel trials, a Phase 2a proof-of-pharmacology trial to evaluate the potential sleep benefit of GlyphAgo in patients with GAD and a Phase 2b randomized placebo-controlled trial in GAD that is designed to be registration-enabling. The GlyphAgo program and the underlying Glyph platform were initially advanced at PureTech, applying the Company's strategy of identifying clinically validated pharmacology and overcoming key limitations through targeted innovation. The Glyph platform and related programs are now being advanced by PureTech's Founded Entity, Seaport Therapeutics.