Pharma BD Deal Intelligence

Antigenics Inc. / Aronex Pharmaceuticals Inc.

2001 · Acquisition/Merger · $29M · Complete

Outcome grade pending — assessed 5 years post-close.

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The coverage arc

Apr 23, 2001 The Pharma Letter Neutral

Antigenics will acquire Aronex Pharmaceuticals, gaining a product pipeline containing six late-stage drugs including Atragen for acute promyelocytic leukemia.

Jul 01, 2001 The Pharma Letter Bearish

FDA declined to approve Atragen, stating Aronex's data did not establish an identifiable population of APL patients who need tretinoin and cannot use the oral…

Mar 31, 2003 Antigenics Inc. 10-K (SEC) Bearish

Antigenics' 10-K disclosed acquired Aronex assets including Atragen, Annamycin, and Nyotran; subsequent filings reflect impairment and discontinuation of…

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Antigenics acquired Aronex Pharmaceuticals for approximately $28.6 million, adding liposomal oncology assets (Atragen for acute promyelocytic leukemia, Annamycin, and Nyotran) to its heat-shock-protein-based cancer-vaccine platform. The Aronex programs were subsequently impaired or discontinued as Antigenics refocused on its lead candidate Oncophage.

Key facts

Related deals — scored

DealYearValueOutcome
Antigenics Inc. / Aronex Pharmaceuticals Inc. (this deal)2001$29M
Abbott Laboratories / Knoll Pharmaceutical Company (BASF Pharma)2001$6.9B100
Vertex Pharmaceuticals Incorporated / Aurora Biosciences Corporation2001$592M95
Amgen Inc. / Immunex Corporation2001$16.0B91
Swedish Orphan Biovitrum AB / Biovitrum2001$493M84
Barr Laboratories Inc. / Duramed Pharmaceuticals Inc.2001$589M82
Cephalon Inc. / Group Lafon (France)2001$450M80

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