Find → Understand → Decide
upifitimab rilsodotin
Discovery priority: MEDIUM · PROBABLE STRANDED
Discovery priority ≠ investment recommendation. These are observation labels, not verified canonical products. Buyer qualification: UNKNOWN.
Why investigate?
Why stranded (event context): inadequate public evidence
Why now: Historical lead requires current reconfirmation; no fresh transaction catalyst established
Company/trial failed before biology? UNKNOWN
Biology implicated: UNCLEAR · Failure context: UNKNOWN
MODEL INFERENCE · MEDIUM confidence. Explicit asset-linked program event or documented experimental trial arm, stop scope, dated recency and biological cautions; no publication count or buyer-gate input.
Current control: UNKNOWN · Restart: UNKNOWN · Development reuse: UNKNOWN
Next diligence: Confirm present program status and exact product identity, then trace scoped rights/data/CMC and review arm-level human outcomes.
Existing buyer gates
Human Signal: UNKNOWN
Cheap Truth: UNKNOWN
Clean Rights: UNKNOWN
Market Pull: UNKNOWN
No event or publication count supplies missing gate evidence. Existing reviewed opportunities remain in their original records.
Evidence timeline
2023-07 · program:reported development discontinuation
July 2023; month precision only
SOURCE TEXT · Exact source
In July 2023, we decided to discontinue the development of upifitimab rilsodotin (XMT-1536), or UpRi, and began to wind-down our UpRi-related development activities, including several clinical trials of UpRi, and our regulatory and commercial readiness efforts.
Present scoped control, intervening transfers, obligations and availability unverified
Interpretation: inadequate public evidence · MACHINE_REVIEW · MEDIUM
Provenance and retrieval scope
{
"hash": "461124a4dbc9080b07af422c9915e054bde2581120cd231f9df220e69212e2ab",
"metadata": {
"complete": true,
"content_hash": "461124a4dbc9080b07af422c9915e054bde2581120cd231f9df220e69212e2ab",
"failed": false,
"last_checked": 1790027032.7475095,
"last_success": 1790027032.7475095,
"live_verified": true,
"scope": "Historical filing text; present ownership/availability not confirmed"
},
"raw_path": "research/obz7_sources/461124a4dbc9080b07af422c9915e054bde2581120cd231f9df220e69212e2ab.html",
"type": "sec",
"url": "https://www.sec.gov/Archives/edgar/data/1442836/000162828025040017/mrsn-20250630.htm"
}2023-07 · program:reported development discontinuation
July 2023; month precision only
SOURCE TEXT · Exact source
In July 2023, we decided to discontinue the development of upifitimab rilsodotin (XMT-1536), or UpRi, and began to wind-down our UpRi-related development activities, including several clinical trials of UpRi, and our regulatory and commercial readiness efforts.
Present scoped control, intervening transfers, obligations and availability unverified
Interpretation: inadequate public evidence · MACHINE_REVIEW · MEDIUM
Provenance and retrieval scope
{
"hash": "814c5248219607362ac309a1fdfb254f6b0d413a86707d1dfbaf7c818007ff09",
"metadata": {
"complete": true,
"content_hash": "814c5248219607362ac309a1fdfb254f6b0d413a86707d1dfbaf7c818007ff09",
"failed": false,
"last_checked": 1790027033.7340825,
"last_success": 1790027033.7340825,
"live_verified": true,
"scope": "Historical filing text; present ownership/availability not confirmed"
},
"raw_path": "research/obz7_sources/814c5248219607362ac309a1fdfb254f6b0d413a86707d1dfbaf7c818007ff09.html",
"type": "sec",
"url": "https://www.sec.gov/Archives/edgar/data/1442836/000162828025052202/mrsn-20250930.htm"
}Freshness is claim-specific
Fetching an old filing today does not establish current ownership or program status.
clinicaltrials · PARTIAL · Not independently refreshed for current scoped claim · checked UNKNOWN
pipeline · PARTIAL · Not independently refreshed for current scoped claim · checked UNKNOWN
rights · PARTIAL · Not independently refreshed for current scoped claim · checked UNKNOWN
contact · PARTIAL · Not independently refreshed for current scoped claim · checked UNKNOWN
patent_assignment · PARTIAL · Not independently refreshed for current scoped claim · checked UNKNOWN
sec · STALE · Historical filing text; present ownership/availability not confirmed · checked 2026-09-21T21:43:52.747509+00:00
sec · STALE · Historical filing text; present ownership/availability not confirmed · checked 2026-09-21T21:43:53.734082+00:00
Registry observations (0)