Key Highlights

● DoorDash will pay $65 a share for Maplebear in a deal valued near $17 billion.

● The transaction is expected to close in late 2027 or the first half of 2028.

● Instacart holders can choose cash, DoorDash stock, or a mix of both.

● Maplebear shares slipped on Thursday even as DoorDash rose.

DoorDash (NASDAQ:DASH) agreed to buy Instacart's parent in a deal valued at about $17 billion, and its shares climbed on a day when most of the Nasdaq-100's heavyweights were sinking.

A rare green screen

Thursday, October 29, was not a kind day for the Nasdaq-100. The index closed at 29,402.51, pulled down by Alphabet (NASDAQ:GOOGL)'s historic plunge, a rout in enterprise software and weakness across semiconductors. Against that backdrop, DoorDash stood out, rising solidly as investors embraced its plan to buy Maplebear (NASDAQ:CART), the company behind Instacart.

DoorDash agreed to pay $65 a share for Maplebear, a deal valued at roughly $17 billion and paid mostly in cash. The transaction is expected to close in late 2027 or the first half of 2028, so this is a long road rather than an overnight merger.

The deal terms

Instacart shareholders will get a choice. They can elect $65 in cash, 0.3372 of a DoorDash share, or a mix of $48.75 in cash plus 0.0843 of a DoorDash share. That structure lets holders decide how much exposure they want to the combined company.

Reports differed on how generous the price is. One measure compared it with Instacart's prior close, while another report compared it with the October 22 close, producing a noticeably larger premium. Either way, the market's verdict on the target was cool: Maplebear shares slipped on Thursday even as DoorDash rose. Maplebear also reported third-quarter Revenue that beat expectations after the close, according to market data.

Why grocery

DoorDash CEO Tony Xu framed the deal around a stubborn problem. "Grocery is one of the hardest things to get right online," he said, according to one report. Instacart has spent years building relationships with grocers, and DoorDash is betting that combining that network with its own delivery muscle will create a stronger offering.

Instacart CEO Chris Rogers highlighted what his company brings. "Instacart has transformed online grocery by helping retailers of all sizes compete and grow," he said, as quoted in media reports.

Swimming against the tide

The timing of DoorDash's gain made it stand out. The Nasdaq Composite tumbled 365.13 points to 26,184.72, and the communication services sector was the worst in the S&P 500 because of Alphabet's slide, which erased roughly $500 billion in market value. Software stocks were hammered after ServiceNow (NYSE:NOW) and Fortinet (NASDAQ:FTNT) reports.

Yet the broader market was more resilient than the headline indexes suggested. More than 400 S&P 500 members closed higher, and NYSE advancers outnumbered decliners by 1.95 to 1. "Money is rotating within the market rather than leaving it," one market strategist said. DoorDash, with a concrete strategic story, gave investors a reason to buy inside a sector that was otherwise out of favour.

The long wait ahead

A closing window stretching into 2028 means plenty can happen. Large deals in consumer technology typically face regulatory review, and integration of two delivery platforms is rarely simple. The mostly cash structure also means DoorDash will be committing significant Capital to the purchase.

What to watch

Watch how the spread between Maplebear's share price and the $65 offer evolves, since that gap reflects the market's confidence that the deal will close. Watch for any regulatory filings or commentary on the review timeline. For DoorDash, the next test is whether investors continue to reward the deal once the initial enthusiasm fades, particularly if the Nasdaq-100's October slide continues into the final session of the month on Friday.