Why Is Crinetics (CRNX) Stock Up 99%? Vertex Buyout Leads July 7 Premarket Movers

Vertex just agreed to buy Crinetics for 85 dollars a share in cash, and CRNX nearly doubled premarket. That is the headline, but it is not the only big move today.

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Here is your premarket gapper watch list for Tuesday, July 7, 2026. This market news roundup covers why the biggest premarket movers are gapping, from the Crinetics (CRNX) buyout to the memory chip selloff hitting Micron (MU), AMD, Marvell (MRVL), and Intel (INTC), plus the Rivian (RIVN) stock offering. Every mover below comes straight from this morning's scan with volume, float, and daily ATR so you can see what is running before the open.

Two stories are driving the tape this morning. First, Vertex Pharmaceuticals agreed to acquire Crinetics Pharmaceuticals in a cash deal, sending CRNX up almost 99 percent toward the offer price. Second, a memory chip selloff is dragging Micron, AMD, Marvell, Intel, and SanDisk lower on supply and valuation worries. Wall Street is also coming back from the holiday weekend to a light data week, with the June Fed minutes on Wednesday as the main scheduled event.

Vertex Pharmaceuticals agreed to acquire Crinetics Pharmaceuticals for 85 dollars per share in cash, an equity value near 10 billion dollars, announced on July 6, 2026. CRNX opened the premarket up 98.93 percent near the 83.59 level, just under the cash offer. The deal followed strong two year acromegaly extension data at ENDO 2026 for the company's oral drug paltusotine, and a recent UBS Buy initiation. Once a cash acquisition is announced, shares typically trade near the fixed offer price, which is what CRNX is doing now.

Micron (MU), AMD, Marvell (MRVL), Intel (INTC), and SanDisk (SNDK) all gapped lower this morning. The catalysts: reports that SK Hynix is slowing its high bandwidth memory (HBM) expansion, fresh questions about whether heavy AI infrastructure spending will pay off, and a more hawkish Federal Reserve under new Chair Kevin Warsh. Micron led the memory names lower. This is a sector wide repricing rather than a single company story, which is why so many semiconductor names show up red on the scan below.