Pharma BD Deal Intelligence

Roche Holding AG / Seragon Pharmaceuticals, Inc.

2014 · Acquisition/Merger · $1.7B · Complete

CALLED IT — OFF BY 10
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The coverage arc

Jul 02, 2014 FierceBiotech Bullish

Roche agreed to pay $725M upfront and up to $1B in milestones for Seragon, betting next-gen oral SERDs led by ARN-810 could rewrite the standard of care in ER+…

Apr 26, 2017 FierceBiotech Neutral

Roche scrapped RG6046, the centerpiece of its 2014 Seragon acquisition, but kept investing in follow-on SERDs that would later become giredestrant.

Feb 20, 2026 Roche Bullish

FDA accepted the NDA for giredestrant in ESR1-mutated, ER+ advanced breast cancer — a regulatory milestone tracing back to the 2014 Seragon acquisition.

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

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Roche/Genentech acquired private San Diego biotech Seragon Pharmaceuticals (spun out of Aragon/J&J) for $725M cash plus up to $1B in milestones, gaining a portfolio of oral SERDs led by ARN-810 for ER+ breast cancer. The deal seeded what later became Roche's giredestrant program.

Did it work? Outcome assessment

Strategic verdict
Failed to Achieve
Financial impact
Dilutive
Pipeline outcome
Assets Terminated

Key facts

Related deals — scored

DealYearValueOutcome
Roche Holding AG / Seragon Pharmaceuticals, Inc. (this deal)2014$1.7B53
Roche Holding AG / Chugai Pharmaceutical Co. Ltd.2002$1.4B100
Roche Holding AG / Ventana Medical Systems Inc.2008$3.4B88
Roche Holding AG / Corange Ltd. (Boehringer Mannheim Group)1997$11.0B88
Roche Holding AG / Ventana Medical Systems Inc.2007$3.4B88
Roche Holding AG / Foundation Medicine, Inc.2015$1.1B87
Roche Holding AG / Foundation Medicine, Inc.2018$5.3B85

Compare all 7 side-by-side →

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