Lumentum is no longer just an optical components company serving legacy networking markets. The business is increasingly being repriced as a critical supplier to the AI infrastructure buildout, especially where speed, bandwidth, power efficiency, and optical connectivity start to become bottlenecks. That shift is real.
Over the last several quarters, Lumentum’s earnings profile has changed materially. Non-GAAP diluted earnings per share increased from $0.57 in fiscal Q3 2025 to $1.67 in fiscal Q2 2026, a gain of roughly 193% in less than a year. Management now guides fiscal Q3 2026 to $2.25. That is not hype. It is a real acceleration in earnings power.
💡 The business momentum is real. The stock may already be pricing much more.
Putting Value on Lumentum’s Rapid Repricing
When a stock rerates this fast, I want one anchor tied directly to what the business is actually delivering. For Lumentum, that anchor is adjusted earnings per share. Revenue growth matters. Backlog matters. Strategic partnerships matter. EPS shows what is actually flowing through the model.
My framework is simple. I anchor Lumentum at $66.24 in fiscal Q3 2025 when the company earned $0.57 of adjusted EPS. I use that quarter as the clean starting point before the run-up. From there, I ask one question: if the stock only moved in line with EPS growth, what should the share price look like each quarter?
💡 I like using EPS here because it cuts through a lot of the noise. It gives a simple way to see how much the business is really earning for each share and whether the stock’s move is staying grounded in that progress.
This also lines up with a price-to-earnings view. Using annualized quarterly EPS, Lumentum moved from roughly 29.1x earnings at the Q3 FY2025 anchor to 34.2x in Q4 FY2025, 52.9x in Q1 FY2026, 69.7x in Q2 FY2026, and about 91.9x using the current share price against the Q3 FY2026 guided midpoint. Earnings rose fast. The multiple is rising faster.
Formula: Modeled share value = 66.24 x (Current Quarter EPS / 0.57)
| Quarter | Adjusted EPS | Actual Share Price | Modeled Share Value | Premium vs Modeled | Forward P/E |
|---|---|---|---|---|---|
| Q3 FY2025 | 0.57 | $66.24 | $66.24 | 0% | 29.1x |
| Q4 FY2025 | 0.88 | $120.23 | $102.27 | +17.6% | 34.2x |
| Q1 FY2026 | 1.10 | $232.75 | $127.83 | +82.1% | 52.9x |
| Q2 FY2026 | 1.67 | $465.54 | $194.07 | +139.9% | 69.7x |
| Q3 FY2026E | 2.25* | $826.88* | $261.47 | +216.2% | 91.9x |
💡 Under this EPS-based framework, Q3 FY2026 implies a value of about $261. The stock is trading at $826.88, or about +216.2% above that modeled value.
Why the Market Is Paying Up
1. Strong Quarter, Higher Expectations
Lumentum’s fiscal Q2 2026 report reset expectations. Revenue came in at $665.5 million, non-GAAP EPS at $1.67, and Q3 guidance moved to $780 million to $830 million of revenue with $2.15 to $2.35 of non-GAAP EPS. Management also said optical circuit switch backlog was already well beyond $400 million and disclosed an incremental multi-hundred-million-dollar co-packaged optics order deliverable in the first half of calendar 2027.
2. NVIDIA Put Real Money Behind the Story
NVIDIA then added strategic weight behind the story. The deal included a $2 billion cash investment, a multibillion-dollar purchase commitment, and future capacity access rights tied to Lumentum’s optics roadmap. Structurally, the investment was done through 2,876,415 shares of Series A convertible preferred stock priced at $695.31 each, with conversion on a one-for-one basis into common stock. Against roughly 71.4 million shares outstanding, that works out to about 4.0% potential dilution if converted. Lumentum also ended fiscal Q2 2026 with $1.155 billion of cash, cash equivalents, and short-term investments, so the NVIDIA cash alone would have taken that figure to roughly $3.16 billion pro forma before any spending.
💡 NVIDIA gets upside through the equity, Lumentum gets the cash to scale, and existing shareholders take about 4% dilution.
3. More Proof the AI Ramp Is Real
The company has also kept adding proof points. At OFC 2026, Lumentum highlighted a 1.6T DR4 OSFP module as a stepping stone toward future 3.2T products. On March 26, it announced a new 240,000-square-foot Greensboro, North Carolina facility for advanced optical devices used in large AI data centers, with production expected to ramp in mid-2028. NVIDIA is expected to be a customer of that facility.
4. S&P 500 Inclusion Helped the Move
The stock also picked up an extra tailwind from joining the S&P 500 before the market opened on March 23, 2026. That does not create earnings, but it does bring passive flows and broader sponsorship.
What $826 Requires
At $826.88, Lumentum is not being valued on current-quarter earnings. Using management’s Q3 FY2026 midpoint of $2.25, the stock is trading at roughly 91.9x annualized earnings. Even if investors are willing to pay a very rich 70x multiple, Lumentum would still need to earn about $2.95 per quarter to support the current share price. At 50x, it would need about $4.13 per quarter.
| Valuation Level | Forward P/E | Annual EPS needed | Quarterly EPS needed |
|---|---|---|---|
| Reasonable | 35x | 23.63 | 5.91 |
| Elevated | 40x | 20.67 | 5.17 |
| Aggressive | 50x | 16.54 | 4.13 |
| Very Aggresive | 60x | 13.78 | 3.45 |
| Extreme | 70x | 11.81 | 2.95 |
| Current | 91.9x | 9 | 2.25 |
The timeline is straightforward. The market needs continued upside from current guidance, then contribution from the disclosed co-packaged optics order in first-half 2027, then broader AI optics ramp, then more supply support from the Greensboro facility in mid-2028.
Forward P/E vs Peers
| Company | Ticker | Current Price | Forward P/E |
|---|---|---|---|
| Lumentum | LITE | 826.88 | 91.9x |
| Coherent | COHR | 256.16 | 35x |
| Fabrinet | FN | 557.97 | 34x |
| Corning | GLW | 147.92 | 48x |
| Ciena | CIEN | 447.76 | 73x |
| Applied Optoelectronics | AAOI | 103.91 | 105x |
💡 Lumentum is trading above most of the cleaner large-cap peers in the group, which suggests the stock is already being valued near the high end of the current AI optics range.
My View
Lumentum has earned a higher valuation. The earnings growth is real. The demand is real. The NVIDIA partnership is real. The roadmap is real.
But the stock has moved much faster than the earnings base that has actually been printed so far. Under the EPS-lock framework, Q3 FY2026 points to about $261, while the latest close is $826.88.
That is where my investing view differs. In the short term, I think LITE looks overvalued relative to the earnings power that has actually been delivered and even relative to near-term guidance. My recommendation, while IV is sky high, is to take advantage of that by selling far out-of-the-money calls, specifically strikes above $1,000 into June 2026, where optimism and option premium have become unusually rich.
The business can continue improving, but the stock is already pricing 2028 into 2026. That gap is where the short-term opportunity is. Happy investing!
Disclaimer: This is not fiduciary advice. Please do your own due diligence and take full responsibility for your actions.
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