Form 8-K Filing: Amendment to Credit Agreement

This Form 8-K filing by Iridium Communications Inc. details Amendment No. 4 to its Amended and Restated Credit Agreement, dated September 15, 2026. This amendment is made in conjunction with the previously announced Agreement and Plan of Merger with Rocket Lab Corporation. Key provisions of the amendment include ensuring the merger transaction does not constitute a "Change of Control" under the credit agreement, obtaining express consent from the requisite lenders for the transaction, and establishing a downstream guarantee from Rocket Lab USA, Inc. post-closing. The amendment also adjusts the interest rate margin for term loans to a range of 2.50%-3.00% (SOFR plus) or 1.5%-2.00% (base rate plus), introduces a 1.00% prepayment premium for repricing transactions, and a 1.00% exit fee after the first anniversary of closing. These changes are effective upon the closing of the transaction, ensuring the term loans can remain outstanding. The filing also includes information regarding the merger, regulatory filings, and forward-looking statements.