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Mainframe Revenues Continue To Bolster IBM's Overall Earnings
IBM beats expectations on the back of a massive Z systems cycle and Red Hat momentum, yet conservative guidance leaves investors questioning the ceiling.
04/24/2026
By the numbers:
- Revenue: $15.917 billion (up 9% YoY)
- Adjusted EPS: $1.91 (vs. $1.81 expected)
- Infrastructure Revenue: $3.326 billion (up 15% YoY)
- IBM Z Revenue Growth: 51%
- Software Revenue: $7.052 billion (up 11% YoY)
Key Highlights:
- IBM Z mainframe revenue surged by 51%, proving that the "dinosaur" hardware remains the central nervous system for global banking and retail.
- The Infrastructure segment outperformed consensus by roughly $170 million, driven by hybrid cloud demand and refreshed Power systems.
- Red Hat grew 13% this quarter, acting as the primary engine within the Software group as enterprises scale OpenShift.
- The market’s 8% negative reaction suggests a disconnect between IBM’s strong hardware cycle and its cautious, unchanged full-year guidance.
The News:
IBM reported its first-quarter 2026 results, beating both top and bottom-line estimates behind a massive surge in mainframe and infrastructure sales. Despite the growth, management chose to maintain its previous full-year guidance of over 5% revenue growth and a $12.5 billion free cash flow target. This conservative outlook, paired with general market anxiety, caused shares to drop 8% in extended trading. You can read the full press release here.
Analyst Take:
I have spent the last few hours digging through the numbers and the sentiment from the market following IBM’s earnings. I find myself at odds with the immediate market reaction. To be blunt, the 8% drop post the call, in the share price, feels like a knee-jerk reaction to a company being responsible with its guidance. While the broader market is obsessed with "AI-first" software plays, IBM just reminded everyone that the world still runs on big iron.
The real story this quarter is the Infrastructure segment. At $3.326 billion, this division is humming. The 51% jump in IBM Z revenue is staggering for a product line that many pundits have been trying to retire for decades. It is clear to me that the current mainframe cycle is not just a routine refresh; it is architected to handle the massive data throughput required for enterprise AI. When you see companies like Anthropic suggesting that AI can modernize COBOL, the market panics, thinking the mainframe is dead. My analysis suggests the opposite. AI is being used to make the mainframe more accessible, not to replace it. The recent collaborations with Arm will further bolster the platform's prospects in the long term, with the result being that IBM is actually lowering the barrier to entry for choosing the Z and LinuxONE platforms.
What was Announced
The quarter highlighted the continued integration of Confluent, which was a major capital allocation priority for IBM in early 2026. This move is designed to bolster IBM’s data streaming capabilities, allowing for real-time data processing across hybrid environments. We also saw a heavy emphasis on the latest IBM Power systems, which grew 17% and aim to deliver enhanced security and energy efficiency for mid-range enterprise workloads. On the software side, Red Hat OpenShift remains the star, acting as the connective tissue for IBM’s hybrid cloud strategy. There was also a notable focus on the integration of HashiCorp, which was acquired in early 2025; this integration is intended to streamline infrastructure automation for IBM Cloud customers.
The Infrastructure numbers were not limited to just the Z systems. IBM Power also showed significant resilience. This hardware is often the forgotten middle child between the mainframe and the cloud, but it remains a high-margin workhorse for Unix-based workloads. When you combine this with a 15% jump in the overall Infrastructure group, it shows that the hybrid cloud thesis is actually working. Organizations are not moving everything to the public cloud; they are keeping their most sensitive data on-prem, and they are buying IBM hardware to do it.
Red Hat remains the crown jewel of the software portfolio. While IBM does not always break out the granular specifics every quarter, the 11% growth in software is largely a Red Hat story, which itself grew 13%. The HashiCorp integration is a strategic play to own the "control plane" of the data center. If IBM can successfully marry HashiCorp’s Terraform with Red Hat’s Ansible, they will own the tools that developers use to build and deploy applications. This is a powerful position to be in.
However, we have to address the elephant in the room: the guidance. IBM kept its 2026 outlook at "over 5%" revenue growth. To me, this feels like sandbagging. If you just grew at 9%, and double digits last quarter, and your most profitable hardware is flying off the shelves, why stay at 5%? Analysts at Barrons have noted that the market was looking for an "up and to the right" revision. By staying steady, IBM signaled that perhaps this first quarter was a pull-forward of demand rather than a sustainable trend. I am less pessimistic; I think IBM is being cautious in a volatile macro environment.
Lastly, the IBM Cloud performance deserves a mention. While it doesn't grab the headlines like AWS or Azure, it is being positioned as a specialized cloud for highly regulated industries. It is not trying to be everything to everyone; it is architected to be the best place for a bank or a government agency to run their workloads. This niche strategy is finally starting to show up in the consistency of the numbers.
Looking Ahead:
IBM is successfully transitioning from a legacy services company to a high-value platform company. The key trend that I am going to be tracking is the continued synergy between Red Hat and the HashiCorp automation suite. If IBM can turn that into a seamless part of the ecosystem, it will become indispensable to the DevOps community. Based on my analysis of the market, my perspective is that the 8% drop is a reactionary response to conservative guidance rather than fundamental weakness. Going forward, I am going to be looking for how the company performs on its free cash flow targets, specifically if they can exceed that $1 billion incremental increase as the high-margin hardware revenue hits the bank. The earnings confirm that hardware cycles still drive the bus at Big Blue. HyperFRAME will be closely monitoring how the company does in maintaining this infrastructure momentum as the Z cycle eventually matures in late 2026.
Steven Dickens | CEO HyperFRAME Research
Regarded as a luminary at the intersection of technology and business transformation, Steven Dickens is the CEO and Principal Analyst at HyperFRAME Research.
Ranked consistently among the Top 10 Analysts by AR Insights and a contributor to Forbes, Steven's expert perspectives are sought after by tier one media outlets such as The Wall Street Journal and CNBC, and he is a regular on TV networks including the Schwab Network and Bloomberg.