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Stock impact report

Spero's stock slides after antibiotic flops in Phase II trial [Yahoo! Finance]

Shattuck Labs, Inc. (STTK) 
Company Research Source: Yahoo! Finance
The company was quick to note that whilst SPR720 showed antimicrobial activity, “the interim analysis did not show sufficient separation from placebo.” Spero also noted that it plans to lay off 39% of its staff. Following the announcement, the company's stock was down by over 17% in premarket trading today. Spero reported that it has enough cash reserves to fund operations into mid-2026. The Phase IIa trial (NCT05496374) enrolled 25 non-refractory patients with SPR720. The interim analysis of 16 patients showed no differentiation in antimicrobial effect from placebo evaluated using the rate of change in log10 colony forming units per millilitre (CFU/mL), the study's primary endpoint. Potential dose-limiting “safety issues”, including three cases of Grade 3 hepatotoxicity, were seen in patients receiving 1,000mg orally once daily dose. Spero plans to complete the data analysis of all 25 enrolled patients and “determine the next steps for the SPR720 program over the next several Show less Read more
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