ELDNEledon Pharmaceuticals, Inc.

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Market reactionShares fell 11% on Nov 5.

ChallengedLast material event Sep 22, 2026 · Updated Oct 26, 2026

Patient-reported benefits support tegoprubart; pivotal trial funding remains the key hurdle

Eledon Pharmaceuticals is a clinical-stage company developing tegoprubart, an anti-CD40L antibody to prevent organ rejection after kidney and islet cell transplants; it is not approved.

Eledon's case is that tegoprubart can prevent kidney transplant rejection as well as tacrolimus while protecting kidney function. BESTOW missed its primary kidney-function endpoint, but longer follow-up showed higher kidney function. Patient-reported benefits add support. Eledon plans a global Phase 3 trial after a successful FDA meeting, with islet transplantation offering another development opportunity. Management expects cash to fund operations into the second quarter of 2027, but the filing identifies substantial going-concern doubt and a need for additional financing.

Thesis checklist

1 risk needs attention

Select a row for evidence
LEGACY Phase 3 starts and is fundedAwaiting evidenceNext: First patient dosed in LEGACY, alongside financing that supports the planned trial.

Why it is in this state

The evidence, what would weaken it and the source filing

BESTOW kidney-function gains lastSupportedNext: Further follow-up showing whether the kidney-function advantage persists.

Why it is in this state

The evidence, what would weaken it and the source filing

Islet transplant program moves toward registrationAwaiting evidenceNext: Company confirmation of FDA clearance of the islet IND and initiation of the registration-path study.

Why it is in this state

The evidence, what would weaken it and the source filing

Eledon raises money for Phase 3At riskNext: A financing or partnership announcement specifying proceeds and the development work it can fund.

Why it is in this state

The evidence, what would weaken it and the source filing

Next decision point

LEGACY initiation and funding

Tests: LEGACY Phase 3 starts and is funded

Late 2026, the company's stated Phase 3 initiation window.

Does Eledon initiate LEGACY with financing sufficient to carry out the planned trial?

Strong, inconclusive and weak outcomes

What to look for in the result and how each would move the checklist

Questions to investigate

History

Price and material events

Select an event marker to read the update below. Marker colors show Thesis status.

ChallengedCurrentClinical
+7.4%Sep 22, 2026

Patient-reported benefits support tegoprubart; pivotal trial funding remains the key hurdle

ChallengedRegulatory
-4.3%Aug 13, 2026

Tacrolimus challenger with cleaner safety profile heads into Phase 3, but runway expires before trial reads out

ChallengedClinical
+5.0%Jun 8, 2026

Tegoprubart's Phase 3 kidney transplant path hinges on whether FDA accepts a non-inferiority safety profile after BESTOW missed its primary efficacy endpoint

ChallengedClinical
-6.0%May 13, 2026

Tegoprubart's Phase 3 path in kidney transplant hinges on FDA accepting a composite endpoint after the Phase 2 primary eGFR endpoint miss

About this history: every entry shows when the Thesis moved and what it said. The reasoning behind each move (the evidence, the analysis and the source filing) and the earnings write-ups are part of a subscription.

Pipeline

Kidney transplant rejection prevention
tegoprubart · 1 upcoming · 5 completed
Phase 3 Study InitiationLEGACYPivotal
Q4 2026
Xenotransplantation
tegoprubart · 1 upcoming
Regulatory Alignment
2026
Type 1 diabetes· islet cell transplantation
tegoprubart · 2 completed
Regulatory Submission
Reported Sep 3, 2026
Enrollment: Completion
Reported Mar 19, 2026

Dates, trials and completed outcomes are open to everyone. What each upcoming milestone hinges on is part of a subscription.

Quick answers

Is the Eledon Pharmaceuticals (ELDN) investment thesis intact?
It is under pressure. Readouts currently rates the Eledon Pharmaceuticals Thesis Challenged. Patient-reported benefits support tegoprubart; pivotal trial funding remains the key hurdle.
What is the next catalyst for Eledon Pharmaceuticals (ELDN)?
The next dated event is Phase 3 start (LEGACY) for Tegoprubart, expected Q4 2026, as stated by the company.
How long will Eledon Pharmaceuticals' cash last?
Eledon Pharmaceuticals has said its cash will fund operations into Q2 2027 (guidance as of August 13, 2026).

Other companies we cover in these diseases

Kidney transplant rejection prevention
Insight Molecular Diagnostics (IMDX)
Islet cell transplantation
CRISPR Therapeutics (CRSP)

Disease areas: Kidney diseases, Liver and digestive diseases, Autoimmune and inflammatory diseases
Catalyst calendar · Upcoming FDA decisions · Thesis changes

Competitive landscape

8 peers tracked

For informational purposes only—not investment advice. Always conduct your own research before making investment decisions.

Financial snapshot

Dates and calculation details

Cash: Market-data provider estimate; measurement period unavailable.

Debt: Market-data provider estimate; a complete comparable filing balance is unavailable.

Quarterly burn: Estimated from trailing free cash flow; measurement period unavailable.

Net cash and estimated runway require verified matching measurement periods. Missing debt components are not assumed to be zero.

Runway: No underlying guidance available.