Southern Wisconsin Aggregate Corporation's EIN is 26-1654491.
Download the official 2025 Form 5500 (PDF) for Southern Wisconsin Aggregate Corporation from the U.S. Department of Labor's EFAST2 system.
Download the official 2025 Form 5500 (PDF)Southern Wisconsin Aggregate Corporation's plan includes profit-sharing, ERISA 404(c) participant direction, a 401(k) feature.