IBM Beats Earnings Estimates, Investors Focus on Cautious Outlook

IBM delivered a solid first quarter, but the market response showed that investors were looking past the beat and straight at the company’s next test: whether its AI and software strategy can turn into durable growth.

The Armonk, New York, company reported revenue of $15.9 billion, up 9% from a year earlier and 6% at constant currency. Adjusted diluted earnings per share came in at $1.91, ahead of Wall Street expectations, while net income was about $1.2 billion. IBM also generated $5.2 billion in net cash from operating activities and $2.2 billion in free cash flow, underscoring that the business is still producing cash even as investors question how much more growth is ahead.

That skepticism was reflected in the stock, which fell more than 6% in after-hours trading as investors focused on IBM’s unchanged full-year outlook. The company reaffirmed its 2026 forecast for more than 5% revenue growth at constant currency and about $1 billion more free cash flow year over year. James Kavanaugh, IBM’s finance chief, said he did not think IBM had ever raised guidance in the first quarter and described the company as a prudent operator, a signal that management is choosing caution over bravado even after a strong report.

The segment mix helped explain why the market is still testing the story. Software revenue rose 11% to $7.1 billion, infrastructure climbed 15% to $3.33 billion, and consulting reached $5.27 billion, up 4%. Consulting narrowly missed expectations, while software, the largest piece of IBM’s business, remains under especially close scrutiny because it represented about 45% of total revenue in IBM’s 2024 annual report.

IBM’s Z mainframe business gave the quarter a notable lift, with hardware revenue jumping 51%. The company has leaned on that franchise for decades to keep enterprise clients tied to its broader platform, and its z17 mainframe, announced on April 8, 2025, is pitched as an AI-era system capable of more than 450 billion inferencing operations a day and more than 250 AI use cases. IBM said the machine was designed with input from more than 100 clients and involved more than 300 patent applications over five years.

IBM is also pressing ahead with acquisitions to deepen its data and AI stack. The company completed its purchase of Confluent on March 17, 2026, and said the combined business serves more than 6,500 enterprises, including 40% of the Fortune 500. IBM says that gives customers real-time trusted data for AI models, agents and automated workflows, but investors are still asking whether those claims can translate into stronger, steadier revenue.

The company entered 2026 from a firmer base than a year earlier, after reporting $67.5 billion in 2025 revenue and $14.7 billion in free cash flow, up from $62.8 billion and $12.7 billion in 2024. IBM says its generative AI book of business has surpassed $12.5 billion since inception, but the market is still waiting for proof that the pipeline can convert into growth that lasts.