ARMONK, N.Y. — IBM blew past Wall Street's targets for the third quarter on Wednesday, posting its strongest software growth in years and a bigger-than-expected cash haul. For about twenty minutes after the numbers landed, the stock partied. Then investors read the fine print, and Big Blue's rally evaporated in after-hours trading.

The tech giant reported $17.1 billion in third-quarter revenue, up 5% from a year ago (6% at constant currency) and well ahead of the roughly $16.8 billion analysts had modeled, according to IBM's quarterly results filed with the SEC. Adjusted earnings per share came in at $2.95, topping the roughly $2.86 consensus, while GAAP diluted EPS from continuing operations hit $2.31, up 26% year over year.

Software and mainframes do the heavy lifting

The beat was broad-based. Software revenue climbed 8% to $7.8 billion, with Red Hat growing 11% and bookings up in the high teens, the company said. Infrastructure — the unit that houses IBM's mainframe business — rose 4% to $3.7 billion, and distributed infrastructure sales jumped 32%. Consulting was essentially flat at $5.3 billion. Free cash flow reached $3.0 billion for the quarter and $7.8 billion for the first nine months, up roughly $0.6–0.7 billion from a year earlier, which IBM's finance chief Jim Kavanaugh called the company's strongest nine-month cash margin on record, per an earnings-call transcript published by Investing.com.

CEO Arvind Krishna leaned hard into the AI story in the release, framing the quarter as proof that enterprise customers are moving past pilot projects.

OUR CLIENTS ARE NOW DEPLOYING SUPER INTELLIGENCE IN WAYS THAT TRANSFORM ENTIRE OPERATING MODELS.

IBM also raised its free-cash-flow outlook for the year, now projecting growth of "more than $1 billion" year over year, while holding its full-year constant-currency revenue growth target steady at 4% to 5%. That unchanged top-line guidance — rather than the quarter that just closed — appears to be exactly what spooked traders.

The after-hours reversal

Shares had jumped nearly 4% during the regular session, closing around $251.49, only to slide about 3.7% once the earnings call wrapped, landing near $242, according to Investing.com's recap of the call; other market-data outlets, including GuruFocus, had initially flagged the stock trading higher in the immediate post-release window before the reversal set in. On the call, analysts from Evercore, Bank of America, Barclays, Jefferies, Citi, J.P. Morgan and RBC pressed management on how much of the software surge came from deals that had simply slipped out of the prior quarter rather than fresh demand — Kavanaugh acknowledged roughly a quarter of the software growth reflected those recovered deals.

It's a familiar pattern for IBM, whose stock has swung sharply on guidance rather than headline results in multiple recent quarters, including a roughly 25% single-day plunge in July after a preliminary results warning rattled investors ahead of its formal Q2 report. Heading into Wednesday's print, the stock had still been up more than 30% on the year.

The earnings also landed just weeks after IBM struck a multi-year, roughly $240 million cloud-infrastructure agreement with AI firm Together AI to support open-source AI workloads — a deal management pointed to as early evidence of the "Super Intelligence" demand it's banking the year's growth on.

What's next: IBM's 2026 guidance now rests heavily on infrastructure and software holding their momentum through the holiday quarter, with management projecting software growth of roughly 7–8% and infrastructure in the low double digits for the full year. Transaction-processing revenue, unusually strong this quarter, is expected to normalize. Investors will get the next real test in late January, when IBM reports fourth-quarter results and either confirms Wednesday's AI-driven acceleration — or hands Wall Street another reason to sell the beat.