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UnitedHealth falls after CEO abruptly exits and guidance is suspended

The healthcare giant is under pressure from rising costs and a murky near-term outlook.

Nia Warfield

UnitedHealth shares sank 10% in premarket trading after the company said CEO Andrew Witty would step down for personal reasons. Witty’s departure follows a turbulent stretch for the insurance giant, including the highly publicized death of Brian Thompson, head of its insurance business, late last year. Longtime chairman Stephen J. Hemsley will now take over as CEO.

Adding to the pressure, UnitedHealth also suspended its full-year guidance just one month after cutting its outlook. Management cited higher-than-anticipated medical costs among its new Medicare Advantage members along with accelerated care activity. The company now expects to return to growth in 2026.

Prior to the premarket dip, UNH shares were down roughly 25% year to date.

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IREN drops on convertible debt offering

Shares of crypto miner and AI compute provider IREN dropped after the Australia-based, US-listed company said late Tuesday that it would sell $875 million in convertible senior debt.

The announcement came late in the trading day and caused a sell-off in the aftermarket session that continued into Wednesday trading.

The offering makes sense; the company can probably get some fairly cheap capital after its shares doubled over the last month.

But it exposes shareholders to some dilution risk if buyers of the hybrid securities do convert them into equity, which explains the market reaction.

The offering makes sense; the company can probably get some fairly cheap capital after its shares doubled over the last month.

But it exposes shareholders to some dilution risk if buyers of the hybrid securities do convert them into equity, which explains the market reaction.

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Tempus AI shares surge to all-time high

Shares of Tempus AI jumped over 7% Wednesday to reach an all-time high of $99.90. Shares of the AI medical diagnostics company are up over 191% for the year so far.

The company has recently announced a flurry of FDA clearances for its technologies. Most recently, on September 22, Tempus AI was granted FDA clearance for its Tempus xR IVD device, which is used to tailor cancer therapies.

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