How Do the FTC’s 2026 Merger Enforcement Changes Affect Startup Acquisitions?

Many founders approach acquisitions with a simple assumption: If the transaction falls below the Hart-Scott-Rodino (HSR) Act filing threshold, there is little antitrust risk.

That assumption has never been entirely accurate. In 2026, it may be particularly dangerous.

Over the past year, merger enforcement policies, filing thresholds, and agency priorities have continued to evolve. At the same time, the Federal Trade Commission (FTC) and Department of Justice (DOJ) have signaled a willingness to examine transactions that historically received little attention, including certain talent-focused acquisitions and intellectual property licensing structures.

For founders preparing for an exit, understanding the distinction between filing requirements and antitrust risk has become increasingly important.

The HSR Threshold Is A Filing Rule, Not A Safety Rule

The HSR Act requires certain transactions to be reported to federal regulators before closing.

For 2026, the size-of-transaction threshold is $133.9 million, up from $126.4 million in 2025. Transactions meeting or exceeding this threshold generally require pre-merger notification filings.

The source also notes that the larger threshold where no size-of-person analysis is required is now $535.5 million.

These figures are important. However, many founders misunderstand what they mean.

The threshold determines whether a filing obligation exists.

It does not determine whether regulators can investigate the transaction.

A deal below the filing threshold can still attract regulatory attention if agencies believe competitive concerns may exist.

Why Below-Threshold Deals Can Still Be Investigated

One of the most significant misconceptions in startup acquisitions is that smaller deals operate outside antitrust review. That is not the case.

The FTC and DOJ retain authority to investigate acquisitions regardless of whether an HSR filing is required.

Historically, many founders treated below-threshold deals as relatively low risk from a regulatory perspective.

Recent enforcement signals suggest agencies may be taking a broader view.

This does not mean every startup acquisition faces scrutiny. It does mean that filing thresholds should not be treated as automatic clearance.

Founders evaluating acquisition opportunities should think beyond the filing question and consider whether regulators might view the transaction as competitively significant.

License-And-Hire Transactions Are Receiving More Attention

One of the more notable developments involves so-called license-and-hire transactions.

These deals typically combine:

• A talent acquisition
• An intellectual property license
• A structure designed to avoid a traditional acquisition format

Historically, many companies viewed these arrangements as lower-risk alternatives to outright acquisitions.

According to the source material, regulators have recently signaled increased interest in reviewing these structures.

The concern is that some transactions may achieve outcomes similar to acquisitions while avoiding traditional filing triggers.

As a result, founders should not assume that alternative deal structures automatically reduce antitrust scrutiny.

Substance often matters more than labels.

Acqui-Hires Are Not Automatically Exempt

Startup acquisitions frequently involve talent as much as technology.

In an acqui-hire transaction, the buyer may be primarily interested in acquiring a team rather than acquiring a standalone business.

Many founders assume these deals are too small or too specialized to attract attention. The agencies have indicated otherwise.

Even when a transaction falls below reporting thresholds, regulators may still review whether the acquisition affects competition, talent markets, or innovation.

This does not mean acqui-hires are problematic.

It simply means they should not be evaluated solely through the lens of transaction size.

Recent HSR Filing Developments Matter Too

The filing process itself remains in flux.

According to the source material, a federal court vacated the FTC’s 2025 HSR form modernization rule in February 2026, concluding that the rulemaking process lacked sufficient cost-benefit justification. As a result, the prior version of the HSR filing form remains in effect for now.

However, regulators have indicated that additional rulemaking efforts are expected.

For founders planning transactions later in the year, this creates some uncertainty. Filing requirements may continue evolving, and companies should monitor developments closely.

Assuming today’s requirements will remain unchanged throughout the transaction process may create complications.

Why Acquisition Timelines Need More Flexibility

Many startup transactions are modeled around a relatively fast closing process. That timeline can become problematic if regulators request additional information.

Even transactions that do not require formal filings can generate:

• Informal agency inquiries
• Requests for documents
• Competitive analysis reviews
• Additional diligence requests

These reviews often take time.

Founders who build acquisition schedules around an ideal closing date may discover that regulatory questions introduce delays they did not anticipate.

Allowing additional flexibility often creates more realistic expectations.

Internal Documents May Receive More Attention Than Expected

Many founders focus heavily on purchase agreements and regulatory filings. Internal company documents can become equally important.

If regulators review a transaction, they may examine materials discussing:

• Competitive positioning
• Market share
• Strategic objectives
• Acquisition rationale
• Industry concentration

The source notes that competitive analyses and board materials are frequently requested during reviews.

This means founders should consider how transactions are discussed internally long before any inquiry arrives.

Well-organized documentation often makes the review process easier.

Common Founder Mistakes

• Treating The HSR Threshold As A Safe Harbor: The filing threshold determines whether notification is required. It does not guarantee regulators will ignore the transaction. Antitrust analysis and filing requirements are separate issues.
• Assuming Alternative Structures Avoid Scrutiny: License-and-hire transactions and acqui-hires may still attract regulatory attention. Agencies increasingly focus on the practical effects of a deal rather than its label. Structure alone is not a shield.
• Ignoring Antitrust Planning Until The End Of The Process: Regulatory issues can affect timing, diligence, and negotiations. Addressing these considerations early generally creates fewer surprises than waiting until closing approaches.
• Failing To Review Internal Documents Before A Transaction: Board materials, competitive analyses, and strategic discussions may become relevant during a review. Preparing those materials in advance often makes responses easier if questions arise.

10 Minute Acquisition Review Self-Check

Before moving forward with an acquisition, ask:

• Does the transaction meet the $133.9 million HSR threshold?
• Could regulators view the deal as competitively significant?
• Does the structure involve a license-and-hire arrangement?
• Is this primarily an acqui-hire transaction?
• Does the timeline allow for regulatory inquiries?
• Have internal competitive analyses been reviewed?
• Are you monitoring potential HSR rule changes?

If several answers remain unclear, additional review may be worthwhile before moving forward.

Regulatory Risk Does Not End Below The Filing Threshold

Many founders view the HSR threshold as the primary antitrust consideration in a transaction.

The reality is more nuanced.

In 2026, regulators continue to signal that transaction structure, competitive impact, and market dynamics may matter just as much as whether a formal filing obligation exists. Planning for that reality can make acquisitions smoother, faster, and more predictable.

Unsure Whether Your Acquisition Strategy Creates Antitrust Risk?

Schedule a free 30-minute call with our team to discuss acquisition planning, regulatory considerations, and common issues founders encounter when navigating today’s merger review environment.

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Sources Used

• FTC Publishes Upward Adjustments of HSR and Related Thresholds for 2026 — Fenwick, https://www.fenwick.com/insights/publications/ftc-publishes-upward-adjustments-of-hsr-and-related-thresholds-for-2026
• FTC Announces 2026 Thresholds for Merger Control Filings Under HSR Act — Cadwalader, https://www.cadwalader.com/resources/clients-friends-memos/ftc-announces-2026-thresholds-for-merger-control-filings-under-hsr-act-and-interlocking-directorates-under-the-clayton-act
• FTC Issues 2026 HSR Filing Thresholds, Fee Adjustments and Interlocking Directorate Updates — Cooley, https://www.cooley.com/news/insight/2026/2026-01-16-ftc-issues-2026-hsr-filing-thresholds-fee-adjustments-and-interlocking-directorate-updates
• Antitrust M&A Enforcement Update — JD Supra, https://www.jdsupra.com/legalnews/antitrust-m-a-enforcement-update-ftc-7004005/