Penumbra Shares Soar Pre-Market — What Is The Boston Scientific Agreement?

Boston Scientific stated that it has agreed to acquire Penumbra in a cash-and-stock transaction that values the latter at an enterprise value of $14.5 billion.
In this photo illustration, the Penumbra logo is seen displayed on a smartphone screen
In this photo illustration, the Penumbra logo is seen displayed on a smartphone screen. (Photo Illustration by Thomas Fuller/SOPA Images/LightRocket via Getty Images)
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Rounak Jain·Stocktwits
Published Jan 15, 2026   |   7:58 AM EST
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Penumbra Inc. (PEN) shares soared 14% in Thursday’s pre-market trade after Boston Scientific Corp. (BSX) announced an agreement to acquire the global healthcare company.

Boston Scientific stated that it has agreed to acquire Penumbra in a cash-and-stock transaction that values the latter at an enterprise value of $14.5 billion.

Boston Scientific shares were down nearly 3% in Thursday’s pre-market session. Retail sentiment on Stocktwits around Boston Scientific trended in the ‘bullish’ territory, while users felt ‘extremely bullish’ about Penumbra.

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