8-K current report · filed Sep 18, 2026

Mistras Group, Inc. (MG) 8-K Current Report: September 18, 2026

Item 1.01Item 5.02Item 7.01Item 8.01Item EX-99.1MG overview

Short answer

Mistras Group, Inc. (MG) filed an 8-K current report with the SEC on September 18, 2026 reporting Item 1.01 (Entry into a Material Definitive Agreement), Item 5.02 (Departure/Election of Directors or Officers), Item 7.01 (Regulation FD Disclosure), Item 8.01 (Other Events), Item EX-99.1 (Exhibit EX-99.1). H.I.G. Capital-affiliated funds agreed to acquire Mistras Group for $20.35 cash per share, taking the company private.

Mistras Group, Inc. 8-K event analysis

AI summary of each reported item and its exhibits

Item 1.01 · Entry into a Material Definitive Agreement

  • H.I.G. Capital-affiliated funds agreed to acquire Mistras Group for $20.35 cash per share, taking the company private
  • Shareholder approval and antitrust clearances remain required, creating transaction-completion risk
  • Equity and debt commitments support merger funding, including purchase consideration, debt repayment, and transaction expenses
  • 40-day go-shop period allows competing bids before customary no-shop restrictions begin
  • Termination fees: approximately $27.5 million for Mistras, $49.9 million for Parent, plus up to $7.0 million expense reimbursement

Item 5.02 · Departure/Election of Directors or Officers

  • Retention awards total $1.845 million for four named executives supporting the contemplated merger
  • CEO Natalia Shuman receives $750,000; CFO Edward Prajzner receives $425,000
  • COO Hani Hammad receives $425,000; CCO Gennaro D’Alterio receives $245,000
  • 50% vests at merger closing and 50% on the 12-month anniversary, subject to continued employment
  • Unvested amounts accelerate after qualifying termination without Cause or resignation for Good Reason

Item 7.01 · Regulation FD Disclosure

  • Standard Regulation FD disclaimer limiting SEC filing liability for disclosed materials
  • Disclosure not incorporated into other Securities Act or Exchange Act filings unless expressly referenced

Item 8.01 · Other Events

  • Voting agreements cover approximately 31% of outstanding shares, creating substantial support for merger approval
  • Insiders and other stockholders committed to vote against competing proposals and avoid soliciting alternatives
  • Agreements terminate if the merger ends, closes, reaches the outside date, or merger consideration is reduced or materially delayed
  • Merger remains subject to stockholder approval, regulatory consents, closing conditions, and potential competing offers
  • Preliminary and definitive proxy statements will provide the detailed merger terms and participant interests

Item EX-99.1 · Exhibit EX-99.1

  • Definitive agreement for H.I.G. acquisition at $20.35 per share in cash, implying approximately $866 million enterprise value including debt
  • Offer premiums of approximately 8% to 30-day and 13% to 90-day VWAPs, with 61% appreciation since December 31, 2025
  • Closing expected late 2026 or early 2027, subject to stockholder and regulatory approvals
  • Voting agreements cover approximately 31% of common stock, strengthening approval certainty
  • 40-day go-shop period ends October 27, 2026; potential competing bids create upside but add completion uncertainty

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