Recent Updates
Recently added Catalysts

Leniolisib

Phase 3

APDS | Small molecule | Other |Pharming Group N.V.|Last Updated: Jun 15, 2026

Target and mechanism

Molecular targetPIK3CD
Target classInhibitor
ModalitySmall molecule

Success Probability

Subscribe to view

Market & Valuation

Subscribe to view

Trial Design

UNCONTROLLEDDMC
Total Trials2
Total Enrollment31

FDA Designations

PRIORITY_REVIEW

Clinical trial landscape

Leniolisib · 5 trials · 4 indications

Phase 3 2Phase 2 3
NCT05693129Pediatric Patients Aged 1 to 6 Years With APDSAPDS
ACTIVE NOT_RECRUITING16 Analytics
NCT05438407Pediatric Patients Aged 4 to 11 Years With APDSAPDS
ACTIVE NOT_RECRUITING15 Analytics
PHASE3ACTIVE NOT_RECRUITING
Pediatric Patients Aged 1 to 6 Years With APDS
APDSUnlock trial analytics
PHASE3ACTIVE NOT_RECRUITING
Pediatric Patients Aged 4 to 11 Years With APDS
APDSUnlock trial analytics

Study Endpoints

Primary Endpoints

Part I & II: Number of Participants with Treatment-emergent adverse events (TEAEs), Serious Adverse Events (SAEs) , and Adverse Events (AEs)
From baseline to end of 12 weeks, & From baseline to through study completion, an average of 1 year, plus 30 days

To assess number of Participants with TEAEs, SAEs, and AEs leading to discontinuation of study drug

Part I & II: Change from baseline in clinical laboratory test results
From baseline to end of 12 weeks, & From baseline to through study completion, an average of 1 year

Number of Participants with change in clinical laboratory test results (hematology, blood

Part I & II: Change from baseline in vital signs
From baseline to end of 12 weeks, & From baseline to through study completion, an average of 1 year

Number of Participants with change in vital signs

Part I & II: Change from baseline in physical examination findings
From baseline to end of 12 weeks, & From baseline to through study completion, an average of 1 year

Number of Participants with change in physical examination findings

Part I & II: Change from baseline in electrocardiograms (ECGs)
From baseline to end of 12 weeks, & From baseline to through study completion, an average of 1 year, plus 30 days

Number of Participants with change in electrocardiograms (ECGs)

Part I & II: Change from baseline in growth and physical development
From baseline to end of 12 weeks, & From baseline to through study completion, an average of 1 year

Number of Participants with change in growth and physical development

Part I & II: Reduction in lymphadenopathy as measured by MRI or low-dose CT
Part I: Baseline and Day 85 Part II: at Day 252, through study completion, an average of 1 year

To assess the impact of leniolisib on lymphadenopathy, patients will be scanned in an MRI or a CT scanner as based on clinical practice and local regulation. Index lesions will be selected from measurable nodal and extra nodal lesions as per the Cheson methodology. The same imaging modality will be used throughout the study for the same patient. Patients will be assessed by MRI, or in sites where local practice and local authorities/IECs/IRBs approve CT scans for research purposes using a low-dose CT scan.

Part I: A Percentage of Inhibition of Unstimulated and Stimulated pAkt Levels in B Cells
Part I: Baseline, Days 29, 57 and 85

To assess change in the PDx effect of leniolisib will be assessed using ex vivo stimulated and unstimulated

Part I & II: Reduction in lymphoproliferation as measured by MRI or low-dose CT
Part I: Baseline and Day 85 Part II: at Day 252, through study completion, an average of 1 year

For the assessment of the impact of leniolisib on lymphoproliferation, patients will be scanned in an MRI or a CT scanner as based on clinical practice and local regulation. Index lesions will be selected from measurable nodal and extra nodal lesions as per the Cheson methodology. The same imaging modality will be used throughout the study for the same patient. Patients will be assessed by MRI, or in sites where local practice and local authorities/IECs/IRBs approve CT scans for research purposes using a low-dose CT scan.

To assess the long-term safety and tolerability of leniolisib
From Baseline to approximately 3 years of Treatment

Adverse events (AEs)

Safety & Tolerability
From baseline to the end of 24 weeks of treatment

To assess the number of AEs/SAEs and number of participants with AEs/SAEs

Number of Participants with Treatment-emergent adverse events (TEAEs), Serious Adverse Events (SAEs) , and Adverse Events (AEs)
From Baseline to the end of 20 weeks of Treatment

• To assess the number of AEs/SAEs and number of participants with AEs/SAEs

Secondary Endpoints

Part I: To assess the total drug exposure (AUC) of leniolisib in pediatric patients (aged 4 to 11 years) with APDS
From baseline to end of 12 weeks of treatment
Part I: To assess the maximum concentration (Cmax) of leniolisib in pediatric patients (aged 4 to 11 years) with APDS
From baseline to end of 12 weeks of treatment
Part I: To assess the time to maximum concentration (Tmax) of leniolisib in pediatric patients (aged 4 to 11 years) with APDS
From baseline to end of 12 weeks of treatment
Unlock Study Endpoints

Study Design & Arms

AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
LeniolisibEXPERIMENTALLeniolisib film-coated granules in 10, 15 and 20 mg strengths administered orally BID by body weight for 12 weeks for Part I and for 1 year for Part II.
Treatment ArmEXPERIMENTALAll subjects will receive leniolisib film-coated tablets (FCTs)

Interventions

NameTypeDescription
LeniolisibDRUGThe doses selected will range from 10 to 50 mg twice daily (BID) (resulting in total daily doses ranging from 20 to 100 mg per day).
Unlock Study Design Details

Eligibility Criteria

Age Range1 Year to 6 Years
SexALL
Healthy VolunteersNo
Study Sites9

Inclusion Criteria: 1. Patient is male or female and between the age of 1 to 6 years old at time of the first study procedure. 2. Patient weighs ≥8 and ≤37 kg at baseline. 3. Patient has a confirmed PI3Kδ genetic mutation of either the PIK3CD (APDS1) or PIK3R1 (APDS2) gene. 4. Patient has at least ...

Countries:United StatesJapanPortugalSpainUnited KingdomFrance
Unlock Eligibility Criteria

Recent Changes (Last 90 Days)

MEDIUMJun 21, 2026NCT05693129primaryCompletionDate: changed
MEDIUMJun 21, 2026NCT05693129primaryCompletionDate: changed
MEDIUMJun 21, 2026NCT05693129primaryCompletionDate: changed

Frequently asked questions about Leniolisib

What is Leniolisib used for?

Leniolisib is an investigational small molecule being developed for primary immunodeficiency disorders (PIDs) linked to PI3K, including activated PI3K delta syndrome (APDS), and for common variable immunodeficiency (CVID). It is currently in clinical development and has not been approved by the FDA.

What does Leniolisib target?

Leniolisib targets PI3K, specifically the PI3K delta isoform, as indicated by its '-lisib' suffix. It is a small molecule designed to modulate the PI3K pathway, which is implicated in immune dysregulation associated with primary immunodeficiency disorders.

Who makes Leniolisib?

Leniolisib is being developed by Pharming Group N.V., a biopharmaceutical company listed on the stock exchange under the ticker PHAR. The company is conducting clinical trials to evaluate the drug's safety and efficacy in patients with APDS and related conditions.

What phase is Leniolisib in?

Leniolisib is in Phase 3 clinical development for pediatric patients with APDS. Additionally, it is being studied in Phase 2 trials for CVID and other PIDs linked to PI3K. It is an investigational drug and has not received FDA approval.

What clinical trials is Leniolisib in?

Leniolisib is being evaluated in several trials, including NCT05438407 (Phase 3, pediatric APDS patients aged 4-11), NCT05693129 (Phase 3, pediatric APDS patients aged 1-6), NCT06897358 (Phase 2, CVID), and NCT06990529 (Phase 2, PIDs linked to PI3K). All trials are active.

Is Leniolisib the same as any other drug?

Leniolisib is not known to be the same as any other drug. It is a distinct small molecule targeting PI3K delta, developed by Pharming Group N.V. for primary immunodeficiency disorders. No alternative names have been reported.