Client Reported $ Filings Share
HELLEN SYSTEMS $30.0K 1
AIRLINES FOR AMERICA $0 1

1 of 1 lobbyist (100%) listed a prior covered government position on a lobbying filing.

CHRISTOPHER BERTRAM
Staff Director, House Transportation Comm. 2012 to 2016; A. Secretary, U.S. Dept of Transportation, 2009 to 2012; Prof. Staff, Senate Commerce Comm, 2003 to ...

2 reports on file for 2025 (latest version of each); 2 reported no contributions.

Posted Period Client Type Income Expenses Activities Lobbyists
2026-01-05 2025 Q4 HELLEN SYSTEMS 4th Quarter - Termination $30.0K — 1 1
2026-01-05 2025 Q4 AIRLINES FOR AMERICA 4th Quarter - Termination — — 1 1
2025-11-11 2025 Q3 HELLEN SYSTEMS 3rd Quarter - Report $30.0K — 1 1
2025-11-11 2025 Q3 AIRLINES FOR AMERICA 3rd Quarter - Report $30.0K — 1 1
2025-07-22 2025 Q2 HELLEN SYSTEMS 2nd Quarter - Report $30.0K — 1 1
2025-07-22 2025 Q2 AIRLINES FOR AMERICA 2nd Quarter - Report $30.0K — 1 1
2025-04-22 2025 Q1 LILIUM AVIATION INC 1st Quarter - Termination (No Activity) — — 0 0
2025-04-22 2025 Q1 HELLEN SYSTEMS 1st Quarter - Report $30.0K — 1 1
2025-04-22 2025 Q1 AIRLINES FOR AMERICA 1st Quarter - Report $30.0K — 1 1
2025-01-25 2024 Q4 LILIUM AVIATION INC 4th Quarter - Report $10.0K — 1 1
  • CHRISTOPHER BERTRAM · prior govt

Source: LDA.gov, data retrieved November 4, 2026. FilingExplorer is not affiliated with LDA.gov; the Senate Office of Public Records cannot vouch for data or analyses derived from these records after retrieval.