Interstate Steel Structures in's EIN is 81-4024385.
Download the official 2025 Form 5500 (PDF) for Interstate Steel Structures in from the U.S. Department of Labor's EFAST2 system.
Download the official 2025 Form 5500 (PDF)Interstate Steel Structures in's plan includes profit-sharing, ERISA 404(c) participant direction, a 401(k) feature, a default investment (QDIA).