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LY5830966

Phase 1

Primary Myelofibrosis | Small Molecules | Oncology |Eli Lilly and Company|Trials Updated: Oct 9, 2026

LY5830966 development status

Highest phase Phase 1
Registered trials 1 across 1 sponsor since Apr 2024

LY5830966 target and mechanism

ModalitySmall Molecules

Also known as AJ1-11095

Success Probability

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Market & Valuation

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Trial Design

CONTROLLEDDMC
Total Trials1
Total Enrollment256

FDA Designations

No designations recorded

LY5830966 clinical trials

LY5830966 · 1 trial · 1 indication

Phase 1 1
NCT06343805A Phase 1 Study of LY5830966 in Participants With Primary Myelofibrosis (PMF), Post-Polycythemia Vera Myelofibrosis (PPV-MF), or Post-Essential Thrombocythemia Myelofibrosis (PET-MF) Who Have Been Failed by a Type I JAK2 Inhibitor (JAK2i)Primary Myelofibrosis
RECRUITING256 Analytics
PHASE1RECRUITING
A Phase 1 Study of LY5830966 in Participants With Primary Myelofibrosis (PMF), Post-Polycythemia Vera Myelofibrosis (PPV-MF), or Post-Essential Thrombocythemia Myelofibrosis (PET-MF) Who Have Been Failed by a Type I JAK2 Inhibitor (JAK2i)
Primary MyelofibrosisUnlock trial analytics

Study Endpoints

Primary Endpoints

Number of patients with treatment-emergent adverse events (TEAEs) as assessed by the National Cancer Institute Common Terminology Criteria for Adverse Events version 5.0 (NCI CTCAE v 5.0).
Baseline through study completion, an average of 1 year

Treatment Emergent AEs will be assessed during routine study visits and compared to Baseline to continuously evaluate safety and tolerability of LY5830966.

Number of patients with Dose Limiting Toxicities (DLTs)
Baseline through study completion, an average of 1 year

Protocol-defined potential DLTs will be assessed by the Safety Review Committee at routine intervals.

To establish the maximum tolerated dose (MTD) and/or recommended phase 3 dose (RP3D) of LY5830966
Baseline through study completion, an average of 1 year

Safety evaluations will occur consistently for each patient and across patients to assess MTD or RP3D. See description of safety evaluations described in outcomes 1 and 2 mentioned above.

Secondary Endpoints

To assess clinical response to LY5830966 evaluated by the Total Symptom Score (TSS).
Baseline through Week 24
To assess clinical response to LY5830966 evaluated by spleen volume assessments.
Baseline through Week 24
To assess clinical response to LY5830966 evaluated by spleen length assessments.
Baseline through Week 24
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Study Design & Arms

AllocationNON_RANDOMIZED
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Cohort 1EXPERIMENTALDose A of LY5830966 taken orally by participants.
Cohort 2EXPERIMENTALDose B of LY5830966 taken orally by participants.
Cohort 3EXPERIMENTALDose C of LY5830966 taken orally by participants.
Cohort 4EXPERIMENTALDose D of LY5830966 taken orally by participants.
Cohort 5EXPERIMENTALDose E of LY5830966 taken orally by participants.
Dose Expansion Cohort 1EXPERIMENTALCandidate RP3D of LY5830966 taken orally by participants.
Dose Expansion Cohort 2EXPERIMENTALAlternative candidate RP3D of LY5830966 taken orally by participants.
Dose Exploration Cohort 1EXPERIMENTALDose F of LY5830966 taken orally by participants
Dose Exploration Cohort 2EXPERIMENTALDose G of LY5830966 taken orally by participants
Dose Exploration Cohort 3EXPERIMENTALDose H of LY5830966 taken orally by participants\[

Interventions

NameTypeDescription
LY5830966DRUGType II JAK2 Inhibitor
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites21

Inclusion Criteria: * Diagnosis of PMF, post-PV MF, or post-ET MF. * Dynamic International Prognostic Scoring System (DIPSS) Intermediate-1, Intermediate-2 or High-risk MF with less than or equal to (≤)10% blasts, regardless of JAK2 mutation status. * Estimated spleen volume greater than or equal t...

Countries:United StatesFranceItalySpainUnited Kingdom
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Recent Changes (Last 90 Days)

LOWOct 9, 2026NCT06343805startDate: changed
LOWOct 9, 2026NCT06343805startDate: changed

Frequently asked questions about LY5830966

What is LY5830966?

LY5830966 is an investigational small molecule being developed by Eli Lilly and Company for the treatment of myelofibrosis, a type of bone marrow cancer. It is currently in Phase 1 clinical development and has not been approved by the FDA. It is being studied in patients with primary myelofibrosis and related myelofibrosis subtypes.

What is LY5830966 used for in primary myelofibrosis?

LY5830966 is being studied for primary myelofibrosis, post-polycythemia vera myelofibrosis, and post-essential thrombocythemia myelofibrosis. The Phase 1 trial enrolls patients whose disease has failed prior treatment with a type I JAK2 inhibitor. It is investigational and has not been approved for any indication.

Who is developing LY5830966?

LY5830966 is being developed by Eli Lilly and Company, which trades on the New York Stock Exchange under the ticker LLY. Lilly is the sponsor of the Phase 1 clinical program evaluating the small molecule in myelofibrosis patients who have failed a type I JAK2 inhibitor.

What phase is LY5830966 in?

LY5830966 is in Phase 1 clinical development. It is an investigational small molecule and is not FDA approved. The single Phase 1 trial is currently recruiting participants and has an enrollment target of 256 patients across the United States, France, Italy, Spain, and the United Kingdom.

What clinical trials is LY5830966 in?

LY5830966 is being evaluated in one Phase 1 trial, NCT06343805, titled a Phase 1 study of LY5830966 in participants with primary myelofibrosis, post-polycythemia vera myelofibrosis, or post-essential thrombocythemia myelofibrosis who have been failed by a type I JAK2 inhibitor. The trial is recruiting, controlled, and open to adults 18 years and older.