The REG Act of 2026 modifies federal securities laws to require financial regulators to analyze the combined impact of new rules alongside other recent and related regulations when creating securities rules. Specifically, the bill amends four major securities laws—the Securities Act of 1933, the Securities Exchange Act of 1934, the Investment Company Act of 1940, and the Investment Advisers Act of 1940—to add language requiring this cumulative analysis. The changes affect the Securities and Exchange Commission and other agencies responsible for drafting and enforcing securities regulations, as they must now evaluate how their rules interact with each other rather than considering each rule in isolation. The bill does not include specific funding provisions or implementation timelines beyond the requirement that regulators incorporate this cumulative analysis into their standard rulemaking process going forward.