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Erythropoietic Protoporphyria: one US-listed biotech with a clinical-stage programme

Rare Genetic & MetabolicUncontestedData as of 2026-09-04

Competitors1in the clinic
Median market cap$3.0Buniverse median $1.20B
Allocated capital$609M$3.0B competing
Phase 3 or filed10 mid, 0 early
Pure plays0this indication only
Capital rank190/299crowding rank 200

Erythropoietic Protoporphyria is uncontested. Disc Medicine (IRON) is the only US-listed developer in the $100M to $20B band running a clinical programme here, with DISC-1459 in phase 3.

There is no public comparable to price it against. IRON spreads its $3.0B market cap across 5 indications, so $609M of it is allocated here.

The one programme here is in late-stage development, with 1 dated catalyst in the next 12 months.

$609M of allocated capital sits in Erythropoietic Protoporphyria, ranking it 190th of 299 indications by the money committed to it.

Companies developing drugs for Erythropoietic Protoporphyria 1

TickerCompanyLead assetPhaseTrialsMarket capPure playIndicationsNext catalyst
IRONDisc MedicineDISC-1459Phase 32$3.0BNo5 9 Sep 2026

Sorted by phase, then by market capitalisation. Ticker links open the company profile.

Why Erythropoietic Protoporphyria counts as uncontested

Uncontested. One US-listed developer in the size band is running a clinical programme here, so there is no public comparable to price it against.

The map splits indications on two folds: six or more competitors counts as crowded, and a median company above $1.20B counts as richly priced. Erythropoietic Protoporphyria has one competitor and a median of $3.0B.

Rare Genetic & Metabolic

Rare Genetic & Metabolic holds $103B of the map's capital, 15.3% of the total, spread across 32 indications and 48 companies. 10 of those indications have more than one company competing.

See every Rare Genetic & Metabolic indication on the map

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Erythropoietic Protoporphyria pipeline questions

Which biotech companies are developing drugs for Erythropoietic Protoporphyria?

Disc Medicine (IRON, DISC-1459, Phase 3). Those are the 1 US-listed developer in the $100M to $20B market cap band with a clinical-stage programme in Erythropoietic Protoporphyria.

How advanced is the Erythropoietic Protoporphyria pipeline?

Of the 1 clinical-stage programme in Erythropoietic Protoporphyria, 1 is in Phase 3 or filed, 0 are in mid-stage development and 0 are in early-stage development.

Is anyone else developing a drug for Erythropoietic Protoporphyria?

No. IRON is the only US-listed company in the $100M to $20B market cap band with a clinical-stage programme in Erythropoietic Protoporphyria, which is why the indication is classified as uncontested.

When is the next Erythropoietic Protoporphyria catalyst?

The next dated catalyst in Erythropoietic Protoporphyria is IRON on 9 Sep 2026. 1 dated event across the field fall in the next 12 months.

How this page is built

  • Universe is US-listed drug developers with a $100M to $20B market capitalisation, identified by SEC SIC code 2833, 2834 or 2836 or by a pharmaceutical or biotechnology industry classification, less a reviewed exclusion list of contract research organisations, device and diagnostics makers and diversified generics manufacturers.
  • An asset attributed to three or more different companies is treated as shared standard of care rather than any one company’s programme and excluded. Pembrolizumab alone appears under 21 tickers in raw trial data.
  • A programme counts only where at least one industry-sponsored trial supports it, so investigator-initiated academic studies of third-party drugs are excluded.

Allocated capital divides each company’s market capitalisation evenly across the indications it is running clinical programmes in, so every dollar of the universe is counted exactly once. Total market capitalisation competing counts a company in each of its indications and therefore sums to more than the universe.

Third-party market size estimates are not used anywhere on this page. Approved incumbents are excluded from competitor counts, and companies above $20B are outside the universe by construction.

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