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AI brief of an SEC Form 8-K · Mirion Technologies (MIR)

Mirion closes $400.0 million convertible senior notes offering due 2030

Neutral Impact 3 of 5 financing Written later

Mirion Technologies completed a private offering of $400.0 million of 0.25% convertible senior notes due June 1, 2030, on May 23, 2025, after increasing the deal from $300.0 million and exercising in full the initial purchasers' $50.0 million option. The company will use net proceeds of approximately $387.7 million to pay for capped call transactions, repay $250.0 million of its senior secured term loan, and repurchase $31.0 million of Class A common stock.

Key points

  • Notes total $400.0 million principal, mature June 1, 2030, and pay 0.25% annual interest semiannually starting December 1, 2025
  • Initial conversion price is approximately $23.11 per share, a 32.5% premium to the May 20, 2025 NYSE closing price
  • Net proceeds of approximately $387.7 million fund a $44.6 million capped call cost, a $250.0 million term loan repayment, and a $31.0 million share repurchase
  • Company may not redeem the notes before June 6, 2028, and holders can require repurchase at par plus accrued interest upon a fundamental change

The filing

CompanyMirion Technologies (MIR)
Form8-K, current report
Filed with the SECMay 23, 2025, 4:30 PM ET
Accession number0001628280-25-027605

Items reported: 1.01 Material Definitive Agreement2.03 New Direct Financial Obligation3.02 Unregistered Equity Sale8.01 Other Events

Read the filing on SEC.gov ↗

Written by AI on Nov 8, 2026, 1:00 AM ET, from this filing only. Written later: this filing was briefed after the fact, when past filings were added to the site, so the brief may be read with hindsight; the filing itself is the record of what was known on May 23, 2025.

Briefs are written by AI from the filing text and can contain mistakes — open the filing before acting on anything. Impact (1-5) and tone are the AI's reading of the filing for shareholders, not a price forecast. Not investment advice.