Momenta Pharmaceuticals soars after $6.5 billion buyout deal with J&J

Shares of Momenta Pharmaceuticals Inc. MNTA, +5.04% rocketed 69% into record territory in premarket trading Wednesday, after the biotechnology company announced an agreement to be acquired by Johnson & Johnson JNJ, +0.73% in a deal valued at $6.5 billion.

Under terms of the deal, J&J will pay $52.50 for each Momenta share outstanding, representing a 70.4% premium to Tuesday’s closing price of $30.81. J&J’s stock gained 0.2% ahead of the open.

The deal is expected to close in the second half of 2020. J&J said the acquisition provides its Janssen Pharmaceuticals business an opportunity to broaden its leadership in immune-mediated diseases and expand into the autoantibody-driven disease business.

The deal includes full global rights to Momenta’s nipocalimab, a clinically validated anti-FcRn antibody, which allows Janssen to reach more patients by pursuing indications across many autoimmune diseases.

Momenta’s stock has soared 56.2% year to date through Tuesday, while J&J shares have gained 2.9% and the S&P 500 SPX, +0.23% has advanced 4.9%.


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