Lumentum : Investor Technology Event at OFC

LITE 2023

LUMENTUM INVESTOR TECHNOLOGY EVENT

MARCH 7, 2023

FORWARD-LOOKING STATEMENTS AND FINANCIAL PRESENTATION

This presentation contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange

Act of 1934. These include statements regarding our expectations for our markets, customers and industry, any anticipation or guidance as to demand for our

products and technology, statements regarding our expected market share, our plans and expectations regarding the integration of our recent acquisitions, including the benefits for our customers and our business, trends in component supply, our expectations for revenue growth rates, and our guidance with respect to future net revenue, earnings per share, and operating margins, and related assumptions. These forward-looking statements involve risks and uncertainties that could cause actual results to differ materially from those projected. Among the factors that could cause actual results to differ from those contemplated are: (a) the COVID-19 pandemic and related impacts, which may continue to adversely impact our business, financial performance and results of operations; (b) quarter-over- quarter product mix fluctuations, which can materially impact profitability measures due to the broad gross margin ranges across our portfolio; (c) decline of

average selling prices across our businesses or increase in costs, either of which will also decrease our margins; (d) effects of seasonality; (e) the ability of our

suppliers and contract manufacturers to meet production, quality, and delivery requirements for our forecasted demand and the effect of ongoing supply chain constraints, particularly in semiconductors; (f) inherent uncertainty related to global markets, including uncertainty and volatility in the macroeconomic environment, inflationary pressures, changes in the political or economic environment, such as geopolitical conflicts, war, trade and export restrictions and the imposition of tariffs or other duties, and the effect of such market disruptions on demand for our products; (g) changes in customer demand; (h) our ability to attract and retain new customers, particularly in the 3D sensing market; and (i) the risk that Lumentum's financing or operating strategies will not be successful. For more information on these risks, please refer to the "Risk Factors" section included in the Company's Quarterly Report on Form 10-Q for the quarter ended December 31, 2022 filed

with the Securities and Exchange Commission. The forward-looking statements contained in this presentation are made as of the date hereof and the Company

assumes no obligation to update such statements, except as required by applicable law.

Unless otherwise stated, all financial results and projections are on a non-GAAP basis. Our GAAP results, details about our non-GAAP financial measures, and a reconciliation between GAAP and non-GAAP results can be found in our fiscal second quarter 2023 earnings press release which is available on our web site, www.lumentum.com, under the investors section. We have not provided reconciliations from GAAP to non-GAAP measures for our outlook. A large portion of non- GAAP adjustments, such as restructuring charges, stock-based compensation, acquisition-related costs, tax expense impacts, transferring product lines to new production facilities, impairment charges, inventory write down due to plans to exit certain product lines, and other costs and contingencies unrelated to current and

future cash flows, are by their nature highly volatile and we have low visibility as to the range that may be incurred in the future.

© 2023 Lumentum Operations LLC 2

TODAY'S SPEAKERS

ALAN LOWE		WAJID ALI		CHRIS COLDREN		KATHY TA
President and CEO		EVP and CFO		SVP, Chief Strategy		VP, Investor Relations
				and Corp. Dev. Officer

WUPEN YUEN	DOUG ALTEEN	NICOLAS HERRIAU	JASON REINHARDT	ALEX SCHOENFELDER
SVP and GM	SVP and GM	VP and GM	EVP and GM	SVP and GM
Telecom Transmission	Telecom Transport	Datacom	Imaging and Sensing	Commercial Lasers

SCALING PHOTONICS TO

NEW HEIGHTS

ALAN LOWE

President and CEO

KEY MESSAGES

CONTINUED TECHNOLOGY LEADERSHIP

EMERGING

GROWTH OPPORTUNITIES

STRONG

FINANCIAL

PROFILE

• New era in optical networking, enabled by difficult-to-replicatephotonic integration technology
• Large core markets driven by long-term,secular trends
• Edge network capacity inflection and AI in the data center create new, high growth opportunities
• New photonics applications in Automotive, Industrial, and Consumer
• Higher acquisition synergies to drive EPS growth and profitability
• Well capitalized for future growth

© 2023 Lumentum Operations LLC 5