Coherent (COHR) Deep Dive: The AI Optics Profitability Turn, NVIDIA's Co-Packaged Bet, and the SpaceX Boundary

Financial research content, not investment advice. Built from authenticated Aether SEC search, direct 10-K/10-Q/8-K checks, and EvidInvest's own valuation and growth data. Where the evidence stops, we say so.

Coherent ($COHR) is one of the cleanest public-market expressions of the AI optical-networking trade — lasers, transceivers, photonics, datacenter interconnect — and it now carries a very visible NVIDIA endorsement. But the popular version of the story flattens two things that deserve separating: a confirmed, accelerating AI datacenter photonics business that just turned sharply profitable, and a tempting-but-unconfirmed SpaceX/Starlink angle that the current filings do not support.

This deep dive does three things: walks the numbers that actually changed in FY2026, reads exactly what the NVIDIA deal is (and isn't), and is honest about where a mechanical valuation model — including our own — gets COHR wrong and why.

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1. What Coherent is now

After the II-VI/Coherent combination, and after selling its former Aerospace & Defense (A&D) business, Coherent is a vertically integrated photonics and materials company with a deep technology stack spanning specialty materials, semiconductor lasers, passive optics, transceivers, transport equipment, and high-power lasers. Two facts frame everything below:

• The A&D divestiture closed on September 2, 2025 (per FY2026 SEC materials). That matters for the SpaceX question in Section 5.
• The business that's left is increasingly a Datacenter & Communications optics story, and that's the segment AI demand is lighting up.

2. The number that changed: a profitability inflection

The AI-optics narrative is well known. What's underappreciated is how fast it converted to earnings. From Coherent's 10-Q for the three months ended March 31, 2026 (vs. the prior-year quarter):

Three things stand out:

1. Revenue grew about 20.6% year over year — consistent with EvidInvest's recorded ~20.5% three-year revenue CAGR. This is durable, not a one-quarter pop.
2. Gross margin expanded from 35% to 38% as COGS intensity fell from 65% to 62% of revenue — operating leverage plus a richer datacenter mix.
3. Net earnings went from essentially breakeven ($2M) to $182M. Restructuring charges more than halved, and the business crossed into a double-digit net margin.

That is the real headline: AI datacenter demand is no longer just a top-line story for Coherent — it is now showing up at the bottom line.

3. The product engine behind it

Why is the datacenter business the growth driver? Bandwidth, power, and interconnect density are the binding constraints in AI clusters, and that pushes value toward optics. Coherent's own filings lay out a strong position:

• The data-rate mix has moved up fast. More than 50% of datacom revenue now comes from 200G and higher transceivers — a big shift from when 10G was the top rate.
• 800G is shipping in production, and Coherent expects the first 1.6T transceivers to ship "in the next few years."
• The company expects that within five years, the market for 800G + 1.6T datacom transceivers will be larger than all other datacom transceiver types combined — driven largely by AI and ML.
• Its transceivers are protocol-agnostic: the same hardware supports Ethernet, InfiniBand, and proprietary AI/ML protocols such as NVIDIA's NVLink.
• Vertical integration is the moat. Coherent designs and manufactures not just the transceivers but many of the components inside them — lasers, detectors, passive optics — deciding case by case what to build internally vs. source from development partners.

This is what makes the retained AI-datacenter thesis straightforward and confirmed: Coherent sells the optics AI clusters need, it says AI demand is driving the segment, and it controls the component stack that determines cost and roadmap.

4. The NVIDIA deal: read the whole 8-K, not the headline

The headline number is real, but the more important detail is the collaboration attached to it. From Coherent's March 2026 Form 8-K:

• Item 3.02 (the placement): On March 2, 2026, Coherent sold 7,788,161 shares at $256.80 for an aggregate $2 billion in cash, to NVIDIA, in a private placement under the Section 4(a)(2) exemption.
• Item 7.01 (the strategic part): The same release announced a collaboration under which NVIDIA gets access to five additional Coherent product families related to co-packaged optics (CPO), enabling next-generation AI infrastructure.

The second point is the one that changes the thesis. A pure financial investment signals confidence. A co-packaged-optics collaboration across five product families signals that NVIDIA is designing Coherent's photonics into the architecture of next-gen AI systems — CPO is how the industry expects to break the power and density wall as switch and accelerator bandwidth keeps climbing.

Three details from the announcement strengthen that read:

• It is structured as a multi-year, non-exclusive strategic partnership, accompanied by a purchase commitment from NVIDIA — not just an equity stake, but a demand signal.
• The $2 billion is earmarked to fund R&D, future capacity expansion, and U.S.-based manufacturing — i.e., scaling supply for the AI optics roadmap.
• It deepens a roughly 20-year relationship between the two companies. This is an extension of a long-standing supplier tie, not a cold new pairing.

NVIDIA entered at $256.80 on March 2, 2026. By the date of this post (early June 2026) COHR traded in the ~$360–$377 range, so the strategic partner is already well in the money — a useful tell about conviction, though not, by itself, proof of revenue.

Worth noting for honesty: the stock actually fell about 7% on the announcement day — a classic "buy the rumor, sell the news" reaction after a long run-up, not a referendum on the deal's substance.

What the deal confirms: strategic validation, capital, a multi-year purchase commitment, and a named CPO collaboration. What it does not confirm: exact NVIDIA revenue timing, product allocation, unit volumes, or margin contribution. Those still need a source.

5. The SpaceX/Starlink boundary

Here is where a lot of AI-supply-chain content overreaches, and where we draw a hard line.

There is a genuine technology-graph overlap: photonics, lasers, optical links, and space-based communications are adjacent fields, and older, pre-sale Coherent filings carried space-based laser communications, contested-space, and high-energy-laser capability language. That's why a naive graph crawl connects COHR to SpaceX/Starlink.

But Coherent sold the business that housed most of that capability. The A&D divestiture closed September 2, 2025. So the correct, defensible framing is:

The SpaceX/Starlink angle is historical / category technology-graph overlap only. There is no current SEC evidence of a retained SpaceX or Starlink customer, supplier, or procurement relationship after the A&D divestiture. A current claim would need a specific retained-product or counterparty source.

We keep that caveat in the blog, the evidence pack, and any social copy — because it materially changes the implied strength of the relationship. Using Aether isn't about making the story bigger. It's about keeping the boundary visible.

6. The valuation question — and why the mechanical model breaks here

This is the most useful part for EvidInvest readers, because COHR is a textbook case of a stock score being wrong for an explainable reason.

At roughly $377 per share and about a $60B market cap, COHR has re-rated hard — the stock moved from about $76.78 (2025-06-02) to the mid-$300s a year later, a move of roughly +370%, and NVIDIA's March entry at $256.80 is already comfortably in the money. Run COHR through EvidInvest's automated growth-trajectory valuation, though, and the model flags it "DETERIORATING / Overvalued" with an implausibly low fair-value band.

That output is an artifact, not a verdict. The trajectory model leans on per-share earnings history, and COHR's GAAP EPS over the last several years was distorted by:

• the II-VI/Coherent merger (share-count and purchase-accounting effects),
• heavy restructuring charges (still $34M this quarter, down from $74M), and
• a one-time gain on sale of business from the A&D divestiture.

Feed a merger-and-restructuring-distorted EPS series into a CAGR-based model and you get a broken growth rate and a meaningless fair value. This is exactly the failure mode we wrote about in why your stock score might be lying to you — a single methodology applied blindly to a company whose accounting doesn't fit the model's assumptions.

The honest read uses what is clean:

• Revenue: ~$1.8B per quarter, growing ~20% YoY, ~20.5% three-year CAGR.
• Margins: gross margin 38% and rising; net margin just crossed into double digits.
• Direction: restructuring rolling off, datacenter mix richening, a strategic CPO partner embedded in the roadmap.

So the fair-value model says "avoid," but the reason is broken EPS inputs, not a broken business. The defensible conclusion isn't a price target — it's that COHR should be valued on its forward optics earnings power and margin trajectory, not on a trailing GAAP-EPS CAGR, and that the re-rating has already priced in a great deal of optimism. A reader who wants a number should build it off normalized, post-divestiture earnings, not the headline trajectory score.

7. Confirmed vs. inferred vs. needs-a-source

Confirmed SEC facts

• Datacenter & Communications optics exposure; AI datacenter demand cited as the segment's growth driver.
• Q3 FY2026: revenue $1,806M (+20.6% YoY), gross margin 38% (up from 35%), net earnings $182M (up from $2M).
• 800G transceivers in production; 1.6T expected; >50% of datacom revenue from 200G+; protocol-agnostic incl. NVLink; vertical integration of lasers/detectors/passive optics.
• NVIDIA: $2B private placement, 7,788,161 shares at $256.80 (Mar 2, 2026), a multi-year purchase commitment, and a co-packaged-optics collaboration spanning five product families; proceeds earmarked for R&D, capacity, and U.S. manufacturing.
• A&D business sale closed September 2, 2025.

Reasonable inferences

• COHR is a primary supplier-chain beneficiary of the AI optical-networking buildout.
• NVIDIA's investment plus the CPO collaboration is strategic validation of Coherent's place in the AI infrastructure stack.
• SpaceX/Starlink is historical/category graph overlap around lasers, photonics, and optical links.

Still needs a source

• Any current, retained SpaceX/Starlink customer, supplier, or procurement relationship post-divestiture.
• Exact NVIDIA revenue contribution, product mix, or margin impact.
• A defensible forward valuation built on normalized post-divestiture earnings.

8. EvidInvest view

The clean angle on Coherent is not "COHR is a SpaceX supplier." It's that the SEC record supports a confirmed, profitable, accelerating AI-photonics business with a named NVIDIA co-packaged-optics partnership — and that the same record draws a hard boundary around the SpaceX story and exposes why a mechanical EPS-based valuation misreads the stock.

That's the whole point of pairing Aether's SEC reading with EvidInvest's valuation lens: the upside narrative is visible and the evidence boundaries are visible. For a stock that has already re-rated ~370%, knowing exactly which parts of the story are confirmed — and which are just graph overlap or model artifact — is the difference between a thesis and a headline.

For informational purposes only. Not investment advice. Figures are drawn from Coherent's SEC filings and EvidInvest data as of the dates cited; verify against the latest filings before making any decision.