Results of Operations and Financial Condition. On August 6, 2026, MACOM Technology Solutions Holdings, Inc. issued a press release reporting its results of operations for the fiscal third quarter ended July 3, 2026. A copy of the press release is furnished as Exhibit 99.1 to this report.

Results of Operations and Financial Condition. On May 7, 2026, MACOM Technology Solutions Holdings, Inc. issued a press release reporting its results of operations for the fiscal second quarter ended April 3, 2026. A copy of the press release is furnished as Exhibit 99.1 to this report.

Results of Operations and Financial Condition. On February 5, 2026, MACOM Technology Solutions Holdings, Inc. issued a press release reporting its results of operations for the fiscal first quarter ended January 2, 2026. A copy of the press release is furnished as Exhibit 99.1 to this report.

Director — Bryan Ingram: The filing discloses the appointment of a new independent director to the board, which is a routine governance event and not a departure of a senior executive.

COO — Robert Dennehy: The filing announces the internal promotion of a long-tenured employee to the position of Chief Operating Officer, which is a standard succession or expansion event rather than a departure.

Results of Operations and Financial Condition. On November 6, 2025, MACOM Technology Solutions Holdings, Inc. issued a press release reporting its results of operations for the fiscal fourth quarter and fiscal year ended October 3, 2025. A copy of the press release is furnished as Exhibit 99.1 to this report.

Director — Susan Ocampo: The filing discloses the retirement of a board director, which is a routine governance event and not the departure of a senior executive officer.

Results of Operations and Financial Condition. On August 7, 2025, MACOM Technology Solutions Holdings, Inc. issued a press release reporting its results of operations for the fiscal third quarter ended July 4, 2025. A copy of the press release is furnished as Exhibit 99.1 to this report.

Results of Operations and Financial Condition. On May 8, 2025, MACOM Technology Solutions Holdings, Inc. issued a press release reporting its results of operations for the fiscal second quarter ended April 4, 2025. A copy of the press release is furnished as Exhibit 99.1 to this report.

Results of Operations and Financial Condition. On February 6, 2025, MACOM Technology Solutions Holdings, Inc. issued a press release reporting its results of operations for the fiscal first quarter ended January 3, 2025. A copy of the press release is furnished as Exhibit 99.1 to this report.

Unregistered Sales of Equity Securities The information set forth under

Entry into a Material Definitive Agreement Note Issuance On December 19, 2024, MACOM Technology Solutions Holdings, Inc. (the “Company”) closed the issuance of $344,316,000 aggregate principal amount of the Company’s 0.000% convertible senior notes due 2029 (the “Notes”) and approximately 1,582,958 newly-issued shares of the Company’s common stock, par value $0.001 per share (“Common Stock”, and together with the Notes, the “Securities”). Approximately $288.8 million of the Notes and the Comm…

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant The information set forth under

Other Events. Convertible Notes Exchange and Subscription On December 12, 2024, MACOM Technology Solutions Holdings, Inc. (the “Company”) entered into separate, privately negotiated exchange and subscription agreements (the “Exchange and Subscription Agreements”) with a limited number of holders of its 0.250% convertible senior notes due 2026 (the “Existing Convertible Notes”), in each case pursuant to exemptions from registration under the Securities Act of 1933, as amended (the “Securities…

Results of Operations and Financial Condition. On November 7, 2024, MACOM Technology Solutions Holdings, Inc. issued a press release reporting its results of operations for the fiscal fourth quarter and fiscal year ended September 27, 2024. A copy of the press release is furnished as Exhibit 99.1 to this report.

Results of Operations and Financial Condition. On August 1, 2024, MACOM Technology Solutions Holdings, Inc. issued a press release reporting its results of operations for the fiscal third quarter ended June 28, 2024. A copy of the press release is furnished as Exhibit 99.1 to this report.

Results of Operations and Financial Condition. On May 2, 2024, MACOM Technology Solutions Holdings, Inc. issued a press release reporting its results of operations for the fiscal second quarter ended March 29, 2024. A copy of the press release is furnished as Exhibit 99.1 to this report.