Antitrust is among the most high-stakes practice areas in law, with matters routinely involving Fortune 500 companies, multi-billion-dollar transactions, and federal agency scrutiny that can stretch over months. In 2026, a reinvigorated regulatory environment — with the DOJ Antitrust Division and FTC continuing aggressive merger review postures — is generating sustained administrative intensity at antitrust practices. Firms are turning to virtual assistants to manage the billing, corporate client communication, and filing administration that runs parallel to complex regulatory and litigation work.
Corporate Client Billing in High-Volume Merger Practices
Antitrust billing is high-value and high-complexity. A single HSR-reportable transaction can generate hundreds of billed hours across multiple timekeepers in a compressed period, with fees charged for Hart-Scott-Rodino filing preparation, DOJ or FTC response coordination, second request compliance, and ongoing regulatory monitoring. Corporate clients — investment banks, private equity sponsors, and strategic acquirers — typically have rigorous outside counsel guidelines governing rate caps, task code requirements, and e-billing portal submission formats.
Thomson Reuters' 2025 Law Firm Financial Index reported that large-firm antitrust practices experienced an average 9 percent billing guideline rejection rate on submitted invoice line items, one of the highest among specialty practices. Virtual assistants trained in antitrust billing are auditing time entries against OCG requirements before submission, coordinating invoice corrections with the responsible timekeeper, and managing e-billing portal submissions through platforms like Legal Tracker and Passport. The result is fewer write-downs and faster payment cycles on high-value engagements.
Corporate Client Communication and Matter Administration
Antitrust clients operate under significant time pressure during regulatory review processes. Corporate M&A teams, deal counsel, and in-house competition counsel need rapid, accurate communication from outside antitrust advisors. VAs supporting antitrust practices handle the administrative layer of client communication: coordinating matter intake for new HSR filings, maintaining deal timeline trackers, routing regulatory developments to the appropriate client contacts, and preparing pre-call briefing materials for partner client meetings.
Law360's 2026 M&A and antitrust coverage found that corporate clients managing competitive regulatory reviews ranked responsiveness and communication organization among their top criteria for outside antitrust counsel selection. Firms with VA-supported communication workflows are better positioned to meet those expectations without overloading partner and associate time.
DOJ and FTC Filing and Correspondence Coordination
HSR filings require detailed coordination. The filing itself demands extensive financial and operational data from the acquiring and acquired parties, with strict Form instructions and supplemental submission requirements. When the DOJ or FTC issues a second request, the compliance burden escalates sharply — document production runs to millions of pages, and coordination with agency staff attorneys must be managed precisely.
Virtual assistants support the administrative dimensions of HSR and second request compliance: maintaining filing deadline calendars, coordinating document collection from client business units, tracking agency correspondence and response deadlines, and confirming portal receipt acknowledgments. ILTA's 2025 Technology Survey reported that legal operations teams using structured regulatory filing support reduced administrative errors in HSR submissions by 26 percent year-over-year.
Investigation and Government Inquiry Administration
Beyond merger review, antitrust practices advising clients under DOJ or state AG investigation face document production demands, CID (Civil Investigative Demand) response coordination, and ongoing communication with investigative staff. VAs handle the logistical dimension of investigation response: maintaining production schedules, tracking document custodian collection, preparing privilege log frameworks, and coordinating across internal and external review teams.
Clio's 2025 Legal Trends Report found that practices implementing structured document-coordination workflows completed CID and subpoena responses significantly faster, with fewer attorney hours spent on logistics rather than substantive legal analysis.
Cost Efficiency in a Demanding Practice
A dedicated antitrust billing coordinator or regulatory administrator at a major law firm earns $70,000–$100,000 annually. Virtual assistants performing equivalent billing review, client communication support, and filing-coordination functions typically cost 40–55 percent less. For antitrust practices with transaction-driven volume — where merger waves generate activity spikes followed by quieter periods — VA capacity that scales with deal flow is operationally and financially advantageous.
Antitrust firms evaluating VA support for billing and merger administration can explore options at Stealth Agents.
Sources
- Thomson Reuters, Law Firm Financial Index 2025, thomsonreuters.com
- Law360, M&A and Antitrust Practice Report 2026, law360.com
- ILTA, Technology Survey 2025, iltanet.org