Donidalorsen Drug Asset Due Diligence Report 2026: Clinical, IP, Market, Deals, and Go/No-Go
This Donidalorsen Drug Asset Due Diligence Report was built with PatSnap Life Sciences MCP workflows. Drug & Asset MCP establishes identity, ownership and stage; Clinical Trials MCP checks design, endpoints and readouts; Company & Deal Intelligence MCP reconstructs transaction precedent. Explore the MCP servers used in this report.
Decision date: 15 July 2026. Currency fields are presented in US$ millions as returned by the deal dataset. This is a screening memorandum, not legal, medical, patent or investment advice.
Approved
Highest phase
10
Registered trials
23
Result records
3
Matched deals
Executive recommendation: GO
Decision memo
Advance diligence: development maturity and available evidence support continued investment, subject to indication-specific safety, IP, and commercial gates.
The central underwriting question is whether Donidalorsen can convert its ASO profile and KLKB1 biology into clinically meaningful differentiation while preserving an investable safety, IP and commercial position.
1. Asset identity and development status
| Asset | Donidalorsen (query alias: Donidalorsen) |
|---|---|
| Modality / target | ASO; KLKB1; KLKB1 inhibitors |
| Highest global status | Approved |
| Originator | Ionis Pharmaceuticals, Inc. |
| Active developers | Ionis Pharmaceuticals, Inc., Otsuka Pharmaceutical Netherlands B.V., Theratechnologies, Inc. |
The MCP disease footprint includes Hereditary Angioedema. The highest-phase flag is a useful orientation point, but the licensing case depends on indication-level evidence and rights, not the global label alone.
2. Clinical program: design and endpoint audit
| Registry | Phase | Status | Enrollment | Lead primary endpoint |
|---|---|---|---|---|
| NCT05392114 | Phase 3 | Active, not recruiting | 154 | Percentage of Participants with at Least One Treatment-emergent Adverse Event (TEAE), Graded by Severity |
| NCT07298447 | Phase 3 | Recruiting | 20 | Number of Participants with Treatment Emergent Adverse Events (TEAEs) |
| JPRN-jRCT2051240291 | Phase 1 | Pending | 24 | Pharmacokinetic Endpoints: -plasma donidalorsen concentration ,plasma PK parameter ,and cumulative parameter Pharmacodynamic Endpoint: -plasma PKK concentration Immunogenicity Endpoint: -plasma ADA measurement result Safety Endpoints: -Body weight -Physical examination findings -Vital signs (blood pressure, pulse rate ,body temperature) -12-Lead ECG -Clinical laboratory tests (hematology ,blood chemistry ,urinalysis) -Inflammatory (Hs-CRP) -Complement (C5a ,Bb) -Coagulation (PT ,INR ,APTT) -AEs |
The trial set should be diligenced for randomization, comparator relevance, endpoint hierarchy, analysis population, multiplicity, geographic mix and readout timing. For early-stage studies, safety and dose selection can be as decision-critical as response rate.
Reproduce the asset-to-trial workflow with PatSnap MCP
3. Clinical readouts: what is known
An Open-Label Extension Study of ISIS 721744 in Patients With Hereditary Angioedema
Phase 2; n=20; evaluation: not stated. Reported fields: Percentage of Participants With Treatment-emergent Adverse Events (TEAEs) = 100 percentage of participants ; Percentage of Participants With Treatment-emergent Adverse Events (TEAEs) = 66.7 percentage of participants ; -
Safety and Efficacy of Donidalorsen in Adolescent Patients With Hereditary Angioedema: 1-Year Results From OASISplus
Phase 3; n=4; evaluation: Positive. Reported fields: AE-QoL = 4.8 Point
Donidalorsen Treatment of Hereditary Angioedema in Patients Previously on Long-Term Prophylaxis.
Phase 3; n=65; evaluation: Positive. Reported fields: TEAE = 70 %
These fields are structured evidence signals, not a substitute for statistical review. The next diligence pass should reconcile denominators, confidence intervals, follow-up, censoring, dose cohorts and treatment-emergent toxicity against the original abstract, registry and protocol.
4. Market and competitive position
Donidalorsen addresses Hereditary Angioedema. Commercial attractiveness rests on addressable biomarker-positive patients, treatment-line placement, duration, administration burden, pricing and displacement of entrenched standards. The modality—ASO—must demonstrate a benefit large enough to offset class-specific safety and operational costs.
The strongest market-validation signal in this screen is partner behavior: 3 matched transaction record(s) indicate that sophisticated counterparties have assigned strategic value to the asset or its rights. That does not establish net present value; probability of success, remaining R&D spend, royalties, cost sharing and territorial scope still need modeling.
5. Transaction precedent and economics
| Date | Transaction | Phase at deal | Disclosed economics |
|---|---|---|---|
| 2025-12-15 | GENESIS Pharma announces a new partnership with Otsuka Pharmaceutical Europe Ltd. for the commercialization of donidalorsen for hereditary angioedema in Central and Eastern Europe | Approved | Financial terms not disclosed |
| 2024-12-04 | Theratechnologies Announces Exclusive Licensing Agreement with Ionis to Commercialize Olezarsen and Donidalorsen in Canada | NDA/BLA | US$10.0M upfront; US$12.8M milestones |
| 2023-12-18 | Ionis announces European licensing agreement with Otsuka for donidalorsen in hereditary angioedema | Phase 2 | US$65.0M upfront |
Headline values are not directly comparable. Diligence should normalize upfront cash, equity, development and sales milestones, tiered royalties, opt-in mechanics, cost sharing, change-of-control clauses and geography.
6. IP and freedom-to-operate screen
No asset-specific patent-application milestone appeared in the returned milestone slice. That absence is not a freedom-to-operate conclusion; a dedicated family, claim, ownership, expiry, and legal-status search remains mandatory before signing.
The claim chart should separately test composition or sequence coverage, formulation and dosing, indication and biomarker claims, combinations, manufacturing know-how, prosecution history, term extensions and third-party blocking rights. Confirm that licensed patents, data and know-how track every granted territory and field.
7. Principal risks and diligence gates
- Class crowding and differentiation versus other PD-(L)1/VEGF agents
- Immune and anti-angiogenic safety, including bleeding and cardiovascular risk
- Biomarker strategy, indication selection, and head-to-head endpoint execution
Cross-functional diligence should also test CMC comparability, supply chain, pharmacovigilance, regulatory correspondence, data integrity, investigator concentration, partner obligations and change-of-control restrictions.
8. Final go/no-go memorandum
GO
Advance diligence: development maturity and available evidence support continued investment, subject to indication-specific safety, IP, and commercial gates.
Required pre-signing gates: reproduce key efficacy analyses; complete an indication-specific safety review; run a full patent-family and freedom-to-operate search; model risk-adjusted economics by territory; and reconcile all rights, sublicenses and encumbrances.
Build your next drug-asset diligence workflow with PatSnap Life Sciences MCP Servers
Data provenance: PatSnap Drug & Asset MCP, Clinical Trials MCP, and Company & Deal Intelligence MCP; accessed 15 July 2026. Counts and status fields may change as source records update.
