Mammoth Freighters Cuts Ties with Top Lobbying Firm in Quiet LDA Termination

Why It Matters

Mammoth Freighters LLC has terminated its lobbying contract with Cornerstone Government Affairs Inc., ending a relationship that saw the Texas-based aviation company invest $310,000 in congressional advocacy over 18 months. The LDA Termination filing effective September 30, 2025, signals a potential shift in the company's government relations strategy.

The lobbying engagement primarily focused on aircraft conversion and certification issues, with Cornerstone deploying five key lobbyists to advance Mammoth's regulatory objectives. The termination represents a significant change for a company actively pursuing Supplemental Type Certification (STC) for its 777-200LRMF freighter conversion.

Financial Context

Mammoth Freighters' lobbying investment broke down as follows:
- 2024 Q1: $30,000
- 2024 Q2-Q4: $50,000 per quarter
- 2025 Q1: $30,000
- 2025 Q2-Q3: $50,000 per quarter

The total spend of $310,000 suggests this was not a minor engagement for either the client or the lobbying firm. Cornerstone Government Affairs deployed experienced lobbyists including Hassan Anthony Essalih, Michael Joseph Falencki, and Tyler Brian Nelson to manage the account.

Broader Regulatory Landscape

The termination comes at a critical moment for Mammoth Freighters. The company is currently:
- Pursuing aircraft conversion certifications
- Expanding into multiple aircraft conversion programs
- Positioning itself in a growing market where Boeing predicts demand for 2,600 freighters in the next two decades

No specific legislation was directly tied to their lobbying efforts, indicating a broader strategic approach to regulatory engagement rather than targeting specific bills.

Industry Positioning

Mammoth Freighters remains actively involved in the aviation sector, with key partnerships including:
- Qatar Airways Cargo (launch customer for 5 aircraft)
- STS Aviation Services (conversion facility in Manchester, UK)
- AviaAM Leasing (for 777-300ER conversions)

Lobbying Disclosure Act Compliance

The termination filing was signed on January 9, 2026, formally ending the lobbying relationship. This follows standard Lobbying Disclosure Act (LDA) reporting requirements, ensuring transparency in the company's government relations activities.

What's Next

While the lobbying contract has ended, Mammoth Freighters continues to face critical regulatory challenges, particularly in aircraft certification. The company is expected to continue seeking strategic government relations support, potentially through a new lobbying partner with deep aviation sector expertise.

Bottom Line

The lobbying termination does not signal a retreat from regulatory engagement. Instead, it appears to be a strategic recalibration for a company at a critical point in its aircraft conversion and certification journey. Mammoth Freighters remains positioned at the forefront of innovative air cargo solutions, with ongoing efforts to expand its global footprint.