Asset profile
S-4321
Multispecific antibody
Evidence outlook
Early-stage evidence only
Phase 1 / first-in-human studies establish safety, tolerability, and dosing; they are not designed to demonstrate efficacy, so no evidence signal is assigned yet. The first graded signal arrives with a completed confirmatory readout.
Also in development:Psoriasis · Phase 1Psoriatic Arthritis · Phase 1
How the evidence outlook works ↗
Featured trials
The studies most instrumental to this drug's clinical progression, individually graded on design and result. Pick an indication; Research unlocks the trials, endpoints, key results and grades.
Competitive landscape
135 competitors in this universe: 0 direct rivals (same mechanism and indication), 0 same-class, 135 same-indication; 134 further along in development.
| Drug | Stage | Modality | Mechanism | Evidence signal | Reported efficacygraded featured trials |
|---|---|---|---|---|---|
| S-4321: this drug | Phase 1 | Multispecific antibody | PD-1 / FcγRIIb (dual) | ||
| Abatacept (Orencia) | Approved | Protein / enzyme therapeutic | CD80/CD86 (CTLA-4-Ig), Selective T Cell Costimulation Modulator, CD80/CD86 (B7-1/B7-2) on antigen-presenting cells | ||
| Abrocitinib (Cibinqo) | Approved | Small molecule | JAK1 | ||
| Adalimumab (Humira) | Approved | Monoclonal antibody | TNF-alpha | ||
| Adalimumab-Aacf (Idacio) | Approved | — | TNF-alpha | ||
| Adalimumab-Aaty (Yuflyma) | Approved | — | TNF-alpha | ||
| Adalimumab-Adaz (Hyrimoz) | Approved | — | TNF-alpha | ||
| Adalimumab-Adbm (Cyltezo) | Approved | Monoclonal antibody | TNF-alpha | ||
| Adalimumab-Afzb (Abrilada) | Approved | — | TNF-alpha | ||
| Adalimumab-Aqvh (Yusimry) | Approved | — | TNF-alpha | ||
| Adalimumab-Atto (Amjevita) | Approved | — | TNF-alpha | ||
| Adalimumab-Bwwd (Hadlima) | Approved | — | TNF-alpha | ||
| Adalimumab-Fkjp (Hulio) | Approved | — | TNF-alpha | ||
| Adalimumab-Ryvk (Simlandi) | Approved | — | TNF-alpha | ||
| Apremilast (Otezla) | Approved | Small molecule | PDE4 | ||
| Baricitinib (Olumiant) | Approved | Small molecule | JAK, JAK1/2 |
…and 120 more. Research shows the complete landscape.
Unlock the full comparison
Research adds each competitor's evidence grade and sourced trial results, aligned per race, so you can see who actually has the data.
Upcoming events
(1 total)
Estimated primary-completion dates from ClinicalTrials.gov. These are registry estimates, never confirmed readout dates; they can move as trials progress.
2027 (1)
September 2027 (1)
What to watch
All registered studies
Every ClinicalTrials.gov study of this drug's own program, grouped by indication and phase. Research unlocks the studies themselves: titles, statuses, dates and featured-trial cross-links.