Deal Timeline

Plotted by close date where disclosed, otherwise announcement. Select any marker to jump to the deal entry.

The Acquisition Playbook.

Three patterns run through Agenus's acquisitions — what it looks for, how it pays, and how it folds in what it buys.

01
Acquisition criteria
Buy platforms, not products.
Every Agenus acquisition added a discovery capability rather than a marketed drug - 4-Antibody's Retrocyte Display and checkpoint programs, Celexion's SECANT yeast-display technology and IgG library, and PhosImmune's phosphopeptide neoantigens. The company acquired the tools to generate its own pipeline.
4-Antibody AGCelexion, LLC (antibody-discovery assets)PhosImmune Inc.
02
Capital deployment
Small, stock-heavy, milestone-weighted deals.
As a clinical-stage biotech, Agenus paid modest upfront amounts - largely in its own common stock - and pushed the bulk of consideration into contingent milestones tied to share-price appreciation, conserving cash while aligning sellers with long-term value.
4-Antibody AGCelexion, LLC (antibody-discovery assets)PhosImmune Inc.
03
Integration approach
Acquisitions were the exception; licensing and collaboration were the rule.
Agenus scaled mainly through partnerships and out-licensing (with Incyte, Merck, Bristol Myers Squibb, GSK, Gilead and others) and later monetized royalties to Ligand and XOMA - so its handful of acquisitions were narrowly aimed at filling specific technology gaps.
4-Antibody AGCelexion, LLC (antibody-discovery assets)PhosImmune Inc.

The Full Deal Book

3 acquisitions — each with the deal value, financing structure, target revenue, and executive commentary where disclosed.

01 4-Antibody AG $10M
Disclosed in 8-K

Agenus acquired all outstanding capital stock of 4-Antibody AG, a privately held Swiss company with operations in Basel, Switzerland and Jena, Germany, via a Share Exchange Agreement announced January 13, 2014 and completed February 12, 2014. The deal brought in 4-Antibody's Retrocyte Display mammalian-cell platform for rapidly discovering and optimizing fully human antibodies, together with a portfolio of six preclinical immune-checkpoint antibody programs targeting GITR, OX40, CTLA-4, PD-1, TIM-3 and LAG-3. $10M in Agenus stock at closing (3,334,079 shares), plus up to ~$40M in contingent milestone payments.

Agenus' roots in immunotherapy combined with 4-Antibody's state-of-the-art human monoclonal antibody platform and established immune checkpoint programs provide a broad spectrum of immunological approaches to combat cancers and other major diseases.
02 Celexion, LLC (antibody-discovery assets) $1M
Disclosed in 8-K

In an asset purchase closed April 7, 2015, Agenus acquired the key antibody-discovery assets of Celexion, LLC, a privately held Cambridge, Massachusetts biotech. The purchased assets included Celexion's SECANT yeast-display platform, its full-length IgG antibody library, technology for discovering molecules against cell-membrane-associated antigens (such as GPCRs and ion channels), and related intellectual property. $1M cash + 574,140 shares (~$3M) at closing, plus up to $10M in additional cash/stock consideration.

We are highly focused on dissecting the interactions of cancer and the immune system, allowing us to select key points for therapeutic interventions.
03 PhosImmune Inc. $2.5M
Disclosed in 8-K

On December 23, 2015 Agenus acquired all outstanding securities of PhosImmune Inc., a privately held Virginia company, which was then merged into Agenus. PhosImmune contributed a novel portfolio of cancer neoantigens known as phosphopeptide tumor targets (PTTs) - phosphorylated protein fragments on cancer cells that the immune system sees as foreign - discovered by scientific founders at the University of Virginia and Massachusetts General Hospital. $2.5M cash + $7.4M in Agenus stock at closing, plus up to $35M in contingent milestone payments.

PhosImmune's groundbreaking neoantigen assets significantly expand Agenus' current efforts, and present exciting near-term opportunities for new products and partnerships. This acquisition expands our immuno-oncology pipeline and strengthens our neoantigen capabilities to enable the development of best-in-class cancer vaccines and other novel therapies.

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