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Cybersecurity, AI infrastructure and enterprise software are driving the biggest technology acquisitions announced through August 16, 2026. On a disclosed-value basis, Palo Alto Networks’ approximately $6.2 billion purchase of CyberArk, Marvell Technology’s approximately $6 billion acquisition of Celestial AI, and HgCapital’s approximately $5.8 billion deal for OneStream are the leading conventional enterprise-technology transactions so far.
The ranking below separates 2026 announcements from deals that merely closed this year, distinguishes official values from third-party estimates, and keeps data-center and broader AI conglomerate transactions apart from enterprise software.
How this ranking works
This ranking covers transactions announced or completed from January 1 through August 16, 2026, involving enterprise software, cybersecurity, data infrastructure, AI infrastructure, IT services, industrial technology security and technology platforms used by business customers.
Deals are ordered primarily by disclosed transaction value or enterprise value. Values described as approximate come from industry transaction reviews or other reported sources; they should not be read as precise purchase prices unless a buyer or target filing says so. Equity value, enterprise value, assumed debt, earn-outs and future investment commitments are different measures.
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The main ranking excludes commercial cloud-capacity contracts, minority investments without a change of control, acqui-hires, consumer software, gaming and unconfirmed negotiations. Data-center acquisitions and large AI conglomerate transactions are discussed separately because their capital intensity and economics differ sharply from software M&A.
For broader market context, Reuters, citing LSEG data, reported approximately $2.8 trillion in announced global M&A during the first six months of 2026, including approximately $649 billion in technology transactions. That technology total includes infrastructure, semiconductors, data centers and other categories—not just enterprise software. Reuters/LSEG market context
The largest announced enterprise-technology deals of 2026
| Rank | Buyer | Target | Sector | Announcement | Reported value | Status and significance |
|---|---|---|---|---|---|---|
| 1 | Palo Alto Networks | CyberArk | Identity security | February 11 | Approximately $6.2 billion | Reported mega-deal; combines broad security-platform capabilities with privileged-access and identity technology. |
| 2 | Marvell Technology | Celestial AI | AI and data-center infrastructure | February 2 | Approximately $6 billion | Reported transaction; a hardware-heavy deal centered on data movement and interconnect technology. |
| 3 | HgCapital | OneStream Software | Finance and performance management | January 7 | Approximately $5.8 billion | Reported private-equity acquisition of a deeply embedded enterprise application. |
| 4 | Francisco Partners | Jamf | Apple-device management and security | January 8 | Approximately $2.5 billion | Reported take-private transaction; status and final terms should be checked against transaction documents. |
| 5 | Warburg Pincus | Raptor Technologies | Vertical enterprise software | February 23 | Approximately $1.8 billion | Reported transaction serving school and organizational safety workflows; final terms require qualification. |
| 6 | Haveli Investments | Sirion | Contract-lifecycle management | February 25 | Approximately $900 million | Reported enterprise-software deal focused on contract operations. |
| 7 | Blackstone | NetBrain Technologies | Network automation | January 21 | Approximately $750 million | Reported acquisition aimed at enterprise network operations and automation. |
| 8 | CrowdStrike | SGNL | Identity security | January 8 | Approximately $740 million | Reported acquisition extending identity protection to machine and AI-agent identities. |
| Unranked | Nscale | Anyscale | AI cloud infrastructure | July 30 | Terms undisclosed officially; approximately $1.65 billion reported by a transaction database | Included separately because the buyer’s announcement does not disclose a price. |
Values are approximate where noted and are not directly comparable unless the underlying sources use the same definition of value. The CyberArk and Celestial AI figures are reported in a Q1 technology M&A review; OneStream is identified in a separate software-industry review as the largest business-software deal in its sample. Q1 technology M&A review · Q1 software M&A review
The three largest conventional enterprise-technology deals
1. Palo Alto Networks and CyberArk: identity becomes the security control plane
Palo Alto Networks announced the approximately $6.2 billion CyberArk transaction on February 11. CyberArk brings privileged-access management and identity-security capabilities to a buyer whose portfolio spans network, cloud and security operations.
The strategic logic is broader than adding another security product. Enterprise environments now contain employees, contractors, applications, machines and increasingly autonomous AI agents. Each needs authentication, authorization and monitoring. Identity therefore sits close to the control plane for access to data and systems.
For customers, consolidation may mean fewer suppliers, more integrated telemetry and simpler procurement. It can also mean greater vendor concentration, overlapping products and uncertainty about which roadmap survives. Buyers should examine renewal terms, product overlap, API access, data portability and whether existing CyberArk and Palo Alto Networks products will remain independently supported.
The reported value should be treated as approximate until the companies’ definitive filings establish the exact consideration, structure, closing status and any regulatory conditions. Transaction review covering the reported value
2. Marvell Technology and Celestial AI: buying the movement of AI data
Marvell’s approximately $6 billion acquisition of Celestial AI, announced February 2, is best understood as AI infrastructure M&A rather than conventional enterprise software.
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The enterprise implication is indirect but important: organizations deploying large-scale analytics and AI may depend on infrastructure decisions made well below the application layer. A deal can improve a supplier’s ability to deliver an integrated platform, while also increasing concentration among the vendors that determine capacity, compatibility and pricing.
Because the reported value comes from industry M&A coverage, it should not be presented as a precise cash purchase price. Q1 technology M&A review
3. HgCapital and OneStream: the continuing value of CFO software
HgCapital announced an approximately $5.8 billion transaction for OneStream on January 7. OneStream provides financial-performance management software used for planning, reporting, consolidation and analysis.
Its importance is that it is a large enterprise application deal without depending on a generative-AI headline. Finance systems are deeply embedded in monthly close, budgeting, forecasting, controls and executive reporting. That creates switching costs and makes recurring revenue more durable when the product solves a mission-critical workflow.
Private-equity ownership can bring capital for product investment and add-on acquisitions, but it may also bring efficiency programs, changes in packaging or a stronger focus on growth and margins. Customers should monitor ownership-related changes to licensing, support, integrations and product investment.
A software-industry review described OneStream as the largest business-software transaction in its first-quarter sample. The reported $5.8 billion figure should be labeled according to the transaction documents—such as equity value, enterprise value or total consideration—rather than treated as an interchangeable number. Software transaction review
Other significant 2026 announcements
Jamf and the return of platform-focused enterprise software deals
Francisco Partners’ reported approximately $2.5 billion acquisition of Jamf shows the continuing value of enterprise device management. Jamf helps organizations manage and secure Apple devices, a category that sits between endpoint administration, identity and security.
A take-private transaction can provide room to reshape a product portfolio away from quarterly public-market pressure. It can also lead to cost controls, add-on acquisitions or changes in commercial strategy. The practical question for IT departments is whether device-management integrations, support levels and pricing remain predictable during ownership transition.
Raptor Technologies and Sirion: vertical workflows remain attractive
Warburg Pincus’ reported approximately $1.8 billion acquisition of Raptor Technologies is a vertical-enterprise-software transaction. Haveli Investments’ reported approximately $900 million purchase of Sirion targets contract-lifecycle management.
These deals illustrate why acquirers continue to pay for software that is embedded in a specific operational process. Vertical products may have smaller addressable markets than general-purpose platforms, but their specialized data, compliance workflows and customer relationships can create defensible positions.
NetBrain and SGNL: automation and identity converge
Blackstone’s reported approximately $750 million NetBrain transaction reflects demand for automated network operations. CrowdStrike’s reported approximately $740 million acquisition of SGNL points in a different direction: security products are increasingly expected to govern machine and AI identities, not only human logins. Coverage of the CrowdStrike–SGNL transaction
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Repair common Windows errors and clear accumulated junk for a smoother, more stable PC - no reinstall needed.Free scan · no reinstallNscale and Anyscale: an undisclosed AI-infrastructure combination
Nscale announced its acquisition of Anyscale on July 30. The deal combines physical AI capacity with software for training, running and scaling AI workloads—an example of vertical integration from infrastructure into workload orchestration.
Nscale’s official announcement does not state a purchase price. An industry transaction database reports approximately $1.65 billion, but that figure should not appear in a value-ranked table as if it were buyer-confirmed. Nscale announcement · Third-party transaction database
Major deals completed in 2026 but announced earlier
IBM and Confluent: an $11 billion data-platform deal that is not a 2026 announcement
IBM announced its approximately $11 billion enterprise-value acquisition of Confluent on December 8, 2025, and completed it on March 17, 2026. It belongs in a “completed in 2026” list—not in a ranking of deals announced during 2026.
The transaction is strategically important because Confluent’s real-time data infrastructure can support hybrid-cloud integration, governance and access to operational information by enterprise AI systems and agents. IBM’s rationale centers on creating a data platform for enterprise generative AI.
The distinction between announcement and closing matters for investors and buyers. A signed deal may still face shareholder, financing or regulatory conditions; a completed deal has passed those conditions, although integration and product decisions remain ahead. IBM’s original announcement · Closing disclosure
Other transactions announced before 2026 should be handled the same way. Google–Wiz and Palo Alto Networks–Chronosphere should be listed as 2026 closings only if official closing documentation confirms that status; they should not be silently recast as 2026 announcements.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Important deals with undisclosed prices
SAP and Prior Labs
SAP announced its acquisition of Prior Labs on May 4 and completed it on July 17. The purchase price was not disclosed. SAP separately committed more than €1 billion over four years to fund the lab. That investment commitment is not automatically the acquisition price.
Prior Labs focuses on tabular foundation models and structured business data. The transaction suggests that enterprise AI acquisition is expanding beyond language models toward systems designed for the data structures used in finance, operations and business applications. SAP’s Prior Labs announcement · SAP investor materials
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SAP’s acquisition activity also includes Dremio, a data-lakehouse platform intended to expand Business Data Cloud and agentic-AI capabilities, and Reltio. The cited SAP materials do not disclose purchase prices for these transactions. Their strategic importance lies in data access, data quality and governance—prerequisites for useful enterprise AI rather than merely additional model capability. SAP acquisition resources
Accenture, Dragos, runZero and NetRise
Accenture announced a majority investment in Dragos alongside acquisitions of runZero and NetRise to strengthen operational-technology and critical-infrastructure security. No transaction value was stated in the announcement.
This is also a reminder that not every important transaction is a billion-dollar headline deal. Industrial systems, connected infrastructure and critical services have security requirements that differ from ordinary office IT. The combination could broaden Accenture’s implementation and managed-security capabilities, but customers should distinguish a majority investment from a full acquisition when assessing control and product continuity. Accenture announcement
Broader technology transactions that should not be mixed into the ranking
Aligned Data Centers
The approximately $40 billion Aligned Data Centers transaction demonstrates the scale of AI and digital-infrastructure M&A. Data-center capacity can be strategically essential to cloud and AI workloads, but a data-center operator is not economically equivalent to a SaaS company: it requires substantial capital, power, land and long-term capacity planning.
It is therefore more accurate to place Aligned in a digital-infrastructure sidebar than to call it the largest enterprise-software acquisition. Aligned transaction reference
SpaceX and xAI
SpaceX’s reported acquisition of xAI is a much larger AI and conglomerate transaction, but it is not a conventional enterprise-technology acquisition. Treating it as the biggest enterprise-software deal would obscure the difference between consumer or frontier-AI businesses, aerospace operations and enterprise platforms.
What the 2026 deals reveal
- Security is consolidating around identity. CyberArk, SGNL and the broader platform strategies of security vendors point toward protection for people, machines, applications and AI agents.
- AI infrastructure is a full stack. Compute, interconnect, data centers, orchestration software and enterprise data platforms are attracting capital at different layers.
- Governed, real-time data is strategic. IBM–Confluent, SAP–Dremio and SAP–Prior Labs all reflect the need to make business data usable, controlled and available to AI systems.
- Mission-critical software still commands attention without an AI label. OneStream shows that embedded finance workflows remain valuable because they are difficult to replace and central to management control.
- Private equity remains active in mature enterprise applications. OneStream, Jamf, Raptor, Sirion and similar transactions show continued interest in recurring revenue, specialized workflows and add-on opportunities.
- Headline market growth is concentrated. A large technology-sector M&A total does not mean every software category is consolidating equally; a relatively small number of infrastructure and platform mega-deals can dominate the aggregate.
What enterprise buyers should watch after a deal
- Product overlap: identify which tools will be combined, retired or repositioned.
- Contract terms: review renewal dates, price protections, termination rights and changes in packaging.
- Roadmap continuity: ask for support timelines, API commitments and integration plans in writing.
- Data portability: confirm export formats, retention policies and access to logs or models if the product changes.
- Vendor concentration: calculate how much of your security, data or infrastructure stack will depend on one supplier.
- Regulatory remedies: pending deals can change through divestitures, behavioral commitments or delayed closing.
- AI productization: determine whether an acquired AI capability will become a supported product or remain an internal research asset.
What is not in the ranking
Reported negotiations involving Workday are not included because a rumor or approach is not a definitive agreement. Commercial cloud-capacity commitments are excluded because buying future compute capacity is not the same as acquiring a company. Minority investments, asset purchases and talent acquisitions are also not ranked as conventional acquisitions.
These exclusions are not technicalities. They prevent an estimated investment, a contract or an unconfirmed report from being presented as a completed M&A transaction.
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Tools for tracking enterprise M&A
Readers who research transactions regularly may consider specialist platforms, but they are generally poor purchases for a one-off article search. PitchBook is suited to private-company, private-equity and venture research; S&P Capital IQ Pro emphasizes financial, valuation and transaction analysis; FactSet fits institutional research workflows; AlphaSense is designed for searching filings, transcripts and market intelligence; and Crunchbase is more accessible for startup and private-company discovery.
Pricing for PitchBook, Capital IQ Pro, FactSet and AlphaSense is generally sales-led and should be checked directly with the vendor. Crunchbase plan availability and pricing can change. None should replace buyer or target filings when legal status, consideration structure or closing date matters.
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