Promising ABCL635 Phase I Interim Data
Unblinded single-ascending-dose data show ABCL635 was generally well tolerated with no serious adverse events, no severe adverse events, no discontinuations and no liver toxicity; overall incidence of any adverse event was 50% in both treatment and pooled placebo groups with the vast majority grade 1.
Strong Pharmacokinetics and Pharmacodynamics for ABCL635
ABCL635 exhibited linear, approximately dose-proportional PK with low variability and an estimated half-life of ~24 days supporting monthly subcutaneous dosing; dose-dependent testosterone suppression in men was sustained (≈50% to >75% reductions for several weeks at 300, 600 and 900 mg), plus dose-dependent suppression of LH and FSH, demonstrating robust target engagement.
Advancement to Phase II with Clear Near-Term Catalyst
ABCL635 was advanced to Phase II in January; randomized double-blind placebo-controlled study (~80 patients, 1:1, single 600 mg SC dose) is enrolling well with a topline efficacy and safety readout expected in Q3 2026 (primary endpoint at 4 weeks).
Pipeline Progress and Upcoming Milestones
Second clinical program ABCL575 top-line Phase I readout expected in Q4 2026; ABCL688 and ABCL386 are in IND-enabling activities aiming for clinical starts in 2027; company targets adding at least one new development candidate in H1 2026 and up to three additional clinical-stage programs by end of 2027.
Strong Liquidity Position
Approximately $531M in cash, cash equivalents and marketable securities and roughly $125M of available committed government funding (total available liquidity ≈ $655M including unused secured government funds); $428M is invested in short-term marketable securities.
Improving and Managed Expense Profile
Revenue for Q1 2026 was ~$8M versus ~$4M in Q1 2025 (≈100% increase, both periods mostly research fees); R&D spend was ~$47M (≈$4M increase year-over-year, ≈9%); SG&A decreased to ~$12M from ~$19M (greater than 35% reduction), driven by conclusion of IP litigation and organizational changes.
Controlled Cash Burn from Operations
Operating cash used ~$34M in Q1 2026 but excluding marketable securities and other investments operating cash use was only ~$3M; management expects sufficient liquidity to fund at least the next three years of pipeline investments.