SENTRY Phase III: Strong Spleen Volume Reduction (SVR35)
Co-primary SVR35 at week 24: 50% for selinexor + ruxolitinib vs 28% for ruxolitinib alone (p < 0.0001). Rapid meaningful spleen volume reductions observed as early as week 12 and sustained through week 36, indicating a durable effect.
Promising Overall Survival Signal and Disease-Modification Markers in SENTRY
Overall survival hazard ratio 0.43 (nominal p = 0.0222) favoring the combination. Post-hoc analyses show SVR35 predicts OS; 32% of combination patients had ≥20% variant allele frequency (VAF) reductions, consistent with potential disease modification.
Peer Recognition and Publication Plans
SENTRY data selected for a late-breaking oral presentation at ASCO; manuscript planned for a peer-reviewed journal in mid-2026, supporting scientific validation and visibility.
Endometrial Cancer Program: EC042 Enrollment Complete; SIENDO Benchmarks Very Positive
EC042 enrollment complete with 257 ITT and ~220 mITT (primary analysis population); top-line EC042 data expected mid-2026. Prior SIENDO data in p53 wild-type subgroup: median PFS 13.7 vs 3.7 months (HR 0.41) at top-line, extending to median PFS 28.4 months (HR 0.44) on long-term follow-up; p53 wild-type/MMR-proficient subgroup median PFS ~40 months (HR 0.36), comparing favorably to RUBY (HR 0.77).
Quarterly Revenue Growth and Gross-to-Net Improvement
Q1 total revenue $35.1M vs $30.0M year-ago (+~17%). U.S. XPOVIO net product revenue $29.2M vs $21.1M (+~38.4%). Gross-to-net decreased to 21.8% this quarter from 45.0% in Q1 2025 (improvement of ~23.2 percentage points); underlying gross-to-net estimated ~26% excluding atypical adjustments.
Improved Underlying Operating Performance and Confirmed Guidance
Net loss improved to $22.4M from $23.5M year-over-year. Company reports a 20% reduction in loss from operations on an underlying basis. Reaffirmed full-year 2026 guidance: total revenue $130M–$150M; U.S. XPOVIO net product revenue $115M–$130M; combined R&D + SG&A $230M–$245M.
Balance Sheet Strengthening and Commercial Readiness
Ended quarter with $91.2M cash, cash equivalents and restricted cash (including ~ $50M financing completed in March). Company emphasizes established commercial capabilities (sales, market access, medical affairs), community-focused coverage (≈60% of U.S. sales), and preparedness to launch in myelofibrosis and endometrial cancer with limited incremental pre-approval spend.
Commercial Market Opportunity
Addressable U.S. myelofibrosis market: ~20,000 living patients, ~7,000 newly diagnosed first-line annually (~4,000 addressable); company projects up to ~$1B U.S. peak annual revenue for selinexor + ruxolitinib. Endometrial advanced/recurrent pool ≈17,000 annually with ~50% p53 wild-type (substantial maintenance opportunity).