Lumentum: 90% Revenue Growth, a $2 Billion Nvidia Investment, Triple Digits Coming — and the Dilution Story Nobody Is Covering · Chip Stock Investor Podcast summary

Key takeaways

Lumentum is experiencing explosive revenue growth driven by capacity constraints and a booming optical market, with expected triple-digit growth in the near future.
The company's recent financial strategies, including issuing convertible debt at low interest, now pose risks of substantial share dilution once the debt converts as stock prices soar.
Market consolidation and investments—like the North Carolina fab acquisition—are strengthening Lumentum's position in laser manufacturing capacity.
While the growth story is compelling, investors must consider potential headwinds such as dilution, supply chain bottlenecks, and how upcoming product launches could influence market dynamics.
Admitting mistakes and reevaluating investments based on new information remain critical lessons for investors.

Summary

The Power of Being Wrong and How It Shapes Investment Decisions

The hosts open with an engaging discussion about how their previous misconceptions about co-packaged optics, particularly after Nvidia's GTC keynote, led to a missed opportunity. They highlight that people often appreciate honesty about mistakes, which leads to valuable lessons in investing. This segment underscores the importance of reevaluating assumptions and the humility required to admit previous errors.

Lumentum's Recent Performance and Future Outlook

This section provides a deep dive into Lumentum, an integrated device manufacturer in optical networking. The hosts share impressive financial data: a 90% revenue increase in fiscal Q3 2026 and expectations of triple-digit growth by Q4, driven largely by supply constraints and market demand for lasers and related components. The discussion emphasizes the company's accelerated revenue growth, upcoming catalysts like co-packaged optics (CPO), and their impact on the stock and industry.

Bottlenecks, Capacity Constraints, and Market Dynamics in Optical Technologies

An exploration of supply chain bottlenecks, specifically in laser module manufacturing. The hosts use terms like 'bottleneck' and 'choke point' to illustrate how capacity constraints can drive strong performance for those positioned well, like Lumentum. They explain how market consolidation and increased fab capacity are fueling growth, and how these factors could sustain a bullish outlook despite ongoing supply issues.

Financial Strategies, Risks, and Dilution in Lumentum

This section discusses Lumentum's financial health, focusing on their debt and cash position. The hosts explain the nature of convertible debt, how previous low-cost financing is now expiring, and why upcoming share dilution (~20%) is a concern. They analyze how the company's capital structure—issuing new stock to pay off debt—affects shareholders and highlight the importance of understanding these mechanics for investors.

Key Catalysts and Risks Ahead for Lumentum

The hosts identify potential risks, including the upcoming large-scale product launches from co-packaged optics and ongoing debt conversion, which could lead to significant dilution. They also mention recent acquisitions, such as Qorvo's North Carolina fab, expected to increase production capacity in the next few years. The overall tone encourages viewers to consider both the promising growth trajectory and the inherent challenges.

Show notes

Over a year ago, CSI did a three-part deep dive on co-packaged optics after Nvidia dedicated an entire segment of its GTC keynote to the technology — naming Lumentum and Coherent as the primary beneficiaries. The analysis was right. They did not buy.

That mistake is now worth talking about directly.

Lumentum just reported fiscal Q3 2026 revenue up 90% year over year. Q4 guidance implies triple-digit year-over-year growth. Nvidia made a $2 billion investment in both Lumentum and Coherent, and separately announced a major fiber optic cable manufacturing expansion with Corning. Co-packaged optics products have not even begun shipping in volume yet — that catalyst hits in December 2026. The case for Lumentum continues to build.

But this is CSI, and true conviction in a business means covering what could go wrong as well as what is going right. There is a significant dilution story unfolding that every Lumentum shareholder needs to understand before adding to a position.

When the stock was trading at roughly one-tenth of its current price, Lumentum raised cash by issuing convertible notes — a type of debt that converts to equity when the stock reaches certain price milestones. The stock has now blown through those milestones. All of that convertible debt is now eligible to convert into stock at terms that are extremely favorable for the debt holders and extremely expensive for existing shareholders. The result: shares outstanding are expected to increase by approximately 20% over the next two quarters. Nick and Kasey explain the full mechanics clearly — why it happened, what it costs, and whether the revenue acceleration can outrun the dilution.

Also covered: the Qorvo fab acquisition in North Carolina that adds indium phosphide manufacturing capacity in two to three years, and what operating leverage looks like when a company goes from negative margins to all-time highs in the span of a few quarters.

What we cover:

— Why CSI did the deep dive on co-packaged optics and still did not buy — the honest lesson

— Lumentum fiscal Q3 2026: 90% revenue growth — what drove it and what comes next

— Q4 guidance: triple-digit YoY growth before CPO products even ramp

— Nvidia's $2B investment in Lumentum and Coherent — the supply chain signal

— Nvidia and Corning fiber optic expansion — Nvidia's hands all over the supply chain

— Co-packaged optics — the December 2026 catalyst that has not landed yet

— Operating leverage in action: from negative margins to all-time highs

— Convertible notes explained: why ~20% share dilution is coming in 2026

— Qorvo North Carolina fab acquisition — InP capacity coming in two to three years

— The bottleneck in laser module manufacturing and why Lumentum dominates it

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Disclosure: Nick and Kasey hold positions in Lumentum and Coherent. This content is for general information only and is not individual investment advice. All investing involves risk.

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Lumentum: 90% Revenue Growth, a $2 Billion Nvidia Investment, Triple Digits Coming — and the Dilution Story Nobody Is Covering