AMSC acquires Brazil transformer maker, releases $118M tax reserve, but flags control weakness

Filed May 27, 2026 · Period ending March 31, 2026 · Compared to 10-K May 21, 2025 · ~2 min read

Key Changes

• high

  Acquired Comtrafo (Brazil transformer manufacturer) for ~$469M Brazilian Real cash + 2.4M shares, plus up to $382M earnout tied to 3-year EBITDA targets. Adds utility/industrial transformer portfolio and first South American manufacturing footprint.

  Business: Comtrafo acquisition verify on EDGAR →
• high

  Material weakness identified in purchase accounting controls for Comtrafo acquisition; CEO/CFO concluded internal controls ineffective as of March 31, 2026. Auditor issued adverse opinion on internal controls, though financial statements deemed fairly presented.

  Controls & Procedures verify on EDGAR →
• high

  Released $118.4M valuation allowance against deferred tax assets, recognizing non-cash tax benefit that drove net income to $133.8M (vs $6.0M prior year). Management cites three years of cumulative profitability and revenue growth as support.

  MD&A: Income Taxes verify on EDGAR →