Hart-Scott-Rodino Filing: Pre-Merger Antitrust Notification Guide

The size of transaction test evaluates the fair market value of voting securities, assets, or non-corporate interests against the annually adjusted FTC threshold, and any transaction exceeding that value is presumptively reportable unless a specific exemption applies. The size of person test applies below the automatically reportable threshold and requires each ultimate parent entity's net sales and assets to be separately calculated, and the HSR Act and merger clearance practice areas provide guidance on threshold calculations.

Key exemptions include the passive investment exemption for ten percent or less of voting securities held solely for investment, intercompany transfer exemptions, and exemptions for foreign asset acquisitions with limited United States commerce. A party that incorrectly relies on an exemption and closes without filing faces the same per-day civil penalty as a party that never filed, so counsel documents the exemption analysis before closing.

Item 4(c) documents are studies, analyses, and reports prepared by or for any officer or director to evaluate the acquisition with respect to competition or market shares, qualifying regardless of preparation by internal staff or third-party advisors. A hart-scott-rodino filing that omits a qualifying Item 4(c) document is deemed incomplete, resetting the waiting period and potentially triggering separate civil penalties, making conservative scope interpretation the only defensible approach.

Pre-filing review requires counsel to screen strategic planning documents, board presentations, and management reports created in connection with the transaction, because competitive superlatives used by business teams read as admissions of anticompetitive intent to agency reviewers. Counsel applies a two-stage filter to identify non-privileged Item 4(c) and 4(d) documents and separately flags privileged materials, advising business teams to avoid market dominance language that creates avoidable evidentiary risk.

The standard waiting period is thirty calendar days from receipt of a complete hart-scott-rodino filing, reduced to fifteen days for cash tender offers, and the agencies use this window to determine whether the transaction raises competitive concerns. A Second Request extends the waiting period until substantial compliance, potentially taking six months or more at substantial cost, and the antitrust and mergers and acquisitions practice areas provide counsel on response strategy.

Gun jumping occurs when the parties engage in conduct during the waiting period that combines the businesses before clearance, including sharing competitively sensitive data outside a controlled clean team structure or allowing the acquirer to direct the target's ordinary business decisions. A clean team agreement establishes a limited group on each side who may receive sensitive information under strict restrictions, and the corporate M&A and corporate compliance practice areas provide guidance on clean team design.

A failure to file exposes both parties to civil penalties exceeding forty-six thousand dollars per day from the closing date until the deficiency is corrected through a post-closing filing and expiration of the waiting period. Remediation requires a corrective filing, observance of the full waiting period, and agency cooperation, and the HSR Act and merger clearance practice areas offer the antitrust expertise needed to navigate every stage of the hart-scott-rodino filing process and achieve timely clearance.