Pharma BD Deal Intelligence

Bristol-Myers Squibb Company / Eisai Co., Ltd.

2021 · Co-Development · $3.1B · Complete

A $3.1 billion co-development collaboration that paired BMS's development muscle with Eisai's MORAb-202, a folate receptor alpha-targeting antibody-drug conjugate for advanced solid tumors. No milestone or upfront breakdown was disclosed, and no completed outcome assessment exists yet to confirm whether the partnership delivered.

CALLED IT — OFF BY 1
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The coverage arc

Jul 03, 2024 Inside Precision Medicine Bearish

Eisai and BMS end their $3.1 billion ADC deal, but Eisai announced it will continue independent development of MORAb-202 as a folate receptor alpha-targeted…

Sep 04, 2025 ClinicalTrials.gov (NCT05577715) Bearish

Phase 2 randomized NSCLC adenocarcinoma study of MORAb-202 (farletuzumab ecteribulin) TERMINATED; whyStopped: 'Business objectives have changed.' Last update…

Apr 30, 2026 ClinicalTrials.gov (NCT05613088) Neutral

Phase 2 open-label randomized study of farletuzumab ecteribulin vs investigator's choice chemotherapy in platinum-resistant HGS…

Source summaries from our enrichment pipeline; follow links for originals.

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BMS and Eisai entered a global co-development collaboration for MORAb-202, a folate receptor alpha-targeting ADC for advanced solid tumors.

Key facts

Disease & market context

Ovarian Cancer (FRalpha+)

Competitive Landscape

FRalpha-positive platinum-resistant ovarian cancer is a differentiated niche already claimed by a first-in-class ADC. Anti-FRalpha ADCs (direct MOA): AbbVie/ImmunoGen's Elahere (mirvetuximab soravtansine-gynx) is FDA-approved for FRalpha-high platinum-resistant ovarian cancer (accelerated 2022, full 2024 via MIRASOL) with approximately $479M 2024 sales and $100M+ quarterly run-rate; farletuzumab ecteribulin (MORAb-202) is the direct Phase 2 follower with an eribulin (microtubule) payload vs. Elahere's DM4 (maytansinoid). PARP inhibitors (maintenance standard): AstraZeneca/Merck's Lynparza (olaparib, $3.5B+ 2024 sales), GSK's Zejula (niraparib, ~$570M 2024), and Clovis/pharma&'s Rubraca (rucaparib) maintain 1L/2L maintenance in BRCA/HRD+. Anti-VEGF + chemo: Roche's Avastin (bevacizumab) and biosimilars dominate the bevacizumab-combo segment in platinum-sensitive and resistant disease. Chemotherapy: liposomal doxorubicin (Doxil), topotecan, weekly paclitaxel remain SOC backbone. Anti-PD-1: Keytruda (pembrolizumab) has limited ovarian activity. Other FRalpha strategies: Sutro's luveltamab tazevibulin (STRO-002) Phase 2/3 REFRaME. For a commercial lead, MORAb-202's commercial window in ovarian is tight — Elahere's MIRASOL OS benefit and first-mover label leave MORAb-202 dependent on either superior efficacy at lower FRalpha thresholds or better safety (ocular toxicity a known Elahere liability).

Endometrial Cancer

Competitive Landscape

MORAb-202 targets advanced/recurrent endometrial cancer where FRalpha expression is high and the 1L/2L treatment paradigm has shifted to chemo-IO combinations. Anti-FRalpha ADCs (direct MOA): AbbVie/ImmunoGen's Elahere (mirvetuximab soravtansine) is the only approved FRalpha ADC, labeled in platinum-resistant ovarian cancer and generating approximately $479M 2024 sales with endometrial Phase 2 data emerging; farletuzumab ecteribulin (MORAb-202) is the direct ADC competitor still in Phase 2. Anti-PD-1 + tyrosine kinase inhibitor combos (current 1L/2L SOC): Merck/Eisai's Keytruda + Lenvima (pembrolizumab + lenvatinib) is FDA-approved in pMMR advanced EC post-platinum, with Keytruda generating $29.5B in 2024 and Lenvima approximately $1.3B in combined global sales. Anti-PD-1 monotherapy (dMMR/MSI-H): Merck's Keytruda (pembrolizumab) and GSK's Jemperli (dostarlimab, RUBY/NRG-GY018 1L chemo combo approved) define the dMMR segment; Jemperli 2024 sales reached approximately $622M. Chemotherapy: carboplatin/paclitaxel remains backbone. HER2-directed ADC: AstraZeneca/Daiichi's Enhertu (trastuzumab deruxtecan, pan-tumor HER2 accelerated approval) has endometrial data in HER2+ subset. For a commercial lead, MORAb-202's threat depends on FRalpha expression frequency in EC and whether its eribulin payload differentiates from Elahere's DM4; Keytruda+Lenvima's entrenched 1L position leaves only 2L/3L biomarker-selected opportunity.

Deal timeline

Related deals — scored

DealYearValueOutcome
Bristol-Myers Squibb Company / Eisai Co., Ltd. (this deal)2021$3.1B45
Bristol-Myers Squibb Company / Medarex Inc.2009$2.4B92
Bristol-Myers Squibb Company / Celgene Corporation2019$74.0B77
Bristol-Myers Squibb Company / MyoKardia Inc.2020$13.1B76
Bristol-Myers Squibb Company / Karuna Therapeutics2023$14.0B76
Bristol-Myers Squibb Company / Ono Pharmaceutical Co., Ltd.201176
Bristol-Myers Squibb Company / SystImmune Inc.2023$8.4B71

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