Coherent Corp (COHR) Q2 FY2026 Post-Earnings Debrief

1. Executive Summary

2. What Actually Mattered

1. FY2027 revenue growth exceeding FY2026 is the single most important statement. For a company already growing revenue 20%+ YoY, guiding that next year will grow even faster implies accelerating revenue growth — the market pays premium multiples for acceleration. Combined with double-digit sequential growth guidance for both March and June quarters, this anchors the multi-year bull case. Consensus FY2027 of $8.77B (+26% YoY) may actually prove conservative if this guidance holds.

2. Book-to-bill exceeding 4x in data center with visibility through CY2028. CY2026 is "largely booked," CY2027 is "filling very, very quickly," and customer forecasts extend to CY2028. The long-term agreement (LTA) structure with customer financial commitments adds durability — this isn't speculative demand, it's contractually secured. Anderson described "another step function increase in bookings" and expects bookings to increase again in Q3. The sheer magnitude of 4x+ book-to-bill in a $1.7B/quarter business is extraordinary.

3. The CPO mega-order validates the next growth vector. An "exceptionally large purchase order" from a "market-leading AI data center customer" for high-power CW lasers, manufactured on six-inch InP in Sherman TX, is a concrete proof point that CPO is moving from R&D to production. Anderson's framing that scale-up CPO will be "orders of magnitude larger" than scale-out CPO is a major long-term TAM expansion narrative. Revenue starts late CY2026.

4. Six-inch InP execution is a competitive moat, not just a capacity expansion. The narrative evolved from "constraint" in Q1 to "competitive advantage" in Q2. Wafer starts quadrupled QoQ, yields exceed 3-inch lines, dual-site production (Sherman TX + Järfälla Sweden) provides geographic redundancy. Anderson stated definitively that InP supply/demand won't rebalance in CY2026 or CY2027. This means sustained pricing power and customer dependency on COHR's InP supply.

5. OCS engagements expanded from 7 to 10+ customers. While revenue remains immaterial near-term, the customer count expansion and both 64x64 and 320x320 system sizes in backlog signal the product is gaining traction. The TAM was reassessed upward from $2B to "well above $2 billion." This is a CY2027+ revenue driver but the customer momentum matters for multiple expansion now.

6. The gross margin trajectory toward 42%+ is becoming credible. GM improved 470 bps from FY2024, currently at 39%, with six-inch InP cost benefits "just starting" to flow through. Half of InP capacity will be six-inch by year-end at roughly half the per-unit cost. If GM crosses 42%, EPS growth will materially exceed revenue growth — a powerful operating leverage story.

3. Results vs. Expectations

Results vs. Prior Guidance

4. Historical Quarterly Comparison

5. Guidance Bridge & Implications

Forward Consensus Build

6. Estimate Revision Implications

NTM Consensus EPS Trajectory Since Earnings

NTM Revenue Trajectory

7. Transcript Intelligence

Prepared Remarks: Management Emphasis

CEO Anderson led with the transformation narrative: COHR is no longer a diversified photonics conglomerate but an AI data center infrastructure company with accelerating growth. He used the word "extraordinary" repeatedly — a deliberate escalation from Q1's "strong." The prepared remarks covered four key developments: (1) the FY2027 growth rate exceeding FY2026 statement; (2) 4x+ data center book-to-bill with bookings expected to increase again in Q3; (3) the CPO mega-order for high-power CW lasers; and (4) six-inch InP execution ahead of schedule.

CFO Luther provided specifics on the non-GAAP gross margin trajectory — 470 bps improvement from FY2024 to 39.0%, with the 42%+ target becoming increasingly achievable as six-inch InP costs flow through. She highlighted the SG&A target of 8% of revenue (currently 9.6%) as an additional operating leverage driver. The portfolio rationalization continues — Munich materials processing divested, 33 total sites exited in ~6 quarters.

Q&A: Pressure Points

InP Supply/Demand Equilibrium (Thomas O'Malley, Barclays): The most important exchange. O'Malley pushed on when InP supply catches demand. Anderson's response was definitive: "I don't foresee the supply-demand getting back in balance this calendar year. I don't think it happens next calendar year." This implies sustained pricing power and customer dependency on COHR's InP supply through at least CY2027 — a structural competitive advantage.

Book-to-Bill Composition (O'Malley): Pressed on what drove 4x ratio — Anderson confirmed "vast majority" was 800G + 1.6T transceivers. The decomposition matters because transceiver bookings are more directly revenue-convertible than OCS or CPO, which have longer lead times.

Demand Visibility Duration (Samik Chatterjee, JPM): Chatterjee pushed on how far bookings extend. Anderson provided exceptional detail: CY2026 largely booked, CY2027 filling rapidly, customer forecasts extending to CY2028. "A lot of times those forecasts go out two, three years." This level of visibility is unusual in the optical component space.

Gross Margin Contribution from Six-Inch (Michael Mani, BofA for Vivek Arya): Asked specifically about six-inch InP margin impact. Anderson acknowledged benefits "just starting" with "more meaningful" impact over coming quarters. Roughly half of capacity will be six-inch by year-end at approximately half the per-unit cost — a significant structural margin driver.

OpEx Leverage (Karl Ackerman, BNP Paribas): Pushed on whether OpEx could grow at half the rate of revenue growth. Management confirmed the SG&A-to-revenue ratio is on a downward trajectory from 9.6% toward 8%, providing EPS leverage even before gross margin expansion.

Management Quotes by Theme

Demand Trajectory:

"We expect our fiscal 2027 revenue growth rate to exceed our fiscal 2026 growth rate." — CEO Anderson, prepared remarks

"We experienced another step function increase in our data center bookings, with a book-to-bill ratio that exceeded 4x." — CEO Anderson

"Most of our calendar 2026 is booked out, and calendar 2027 is filling very, very quickly... We're also getting really good detailed long-term forecasts from our big customers. A lot of times those forecasts go out two, three years." — CEO Anderson

InP Supply Advantage:

"It seems like every quarter we think we're gonna catch up, and then the demand keeps increasing. So, I don't foresee the supply-demand getting back in balance this calendar year. I don't think it happens next calendar year." — CEO Anderson

"We more than quadrupled the number of wafer starts from our September quarter to our December quarter." — CEO Anderson

CPO:

"We believe the scale-up CPO opportunity will dwarf the opportunity in scale-out. It will be orders of magnitude larger." — CEO Anderson

Margin Expansion:

"We've actually improved our gross margin by about 470 basis points through the elements of the strategy that I've described here. We're still, as I would consider, to be in our early stages as we continue to drive toward that greater than 42% target." — CFO Luther

8. Segment & KPI Forensic Review

Data Center / AI Networking — Growth Engine

Data center is the dominant growth driver, with bookings accelerating sequentially and visibility extending to CY2028. The transition from 800G to 1.6T is underway with EML and SiPho leading and VCSEL-based 1.6T ramping H2 CY2026. The technology cycle is compressing — Anderson noted nodes now turn over every 2 years (vs 6 years historically between 100G and 400G), creating recurring demand for test, production, and field equipment.

Telecom / Communications

Telecom growth moderated slightly from Q1's +11% sequential but remains strong on a YoY basis. The new Multi-Rail product was introduced as a next-generation telecom offering. Telecom is a steady contributor but no longer the primary narrative.

Industrial

Roughly flat sequentially. However, Anderson introduced a bullish data point: "significant increase in orders from Semicap customers" expected to drive sequential growth in the June quarter. This represents a potential bottoming inflection for the industrial segment, though it remains less than 30% of revenue and declining in mix relevance.

Key Cross-Quarter Shifts

• InP narrative evolution: From "constraint limiting growth" (Q1) to "competitive moat and cost advantage" (Q2). The reframing is significant — what was a bear case talking point is now a bull case differentiator.
• CPO escalation: From general progress (Q1) to concrete "exceptionally large purchase order" (Q2) with revenue starting late CY2026.
• OCS TAM reassessment: From $2B TAM (Q1) to "well above $2 billion" (Q2) with customer count from 7 to 10+.
• Tariff discussion disappeared: Prominent in Q3/Q4 FY2025, mentioned in Q1, completely absent from Q2. Either resolved or deliberately avoided.
• FY2027 forward guidance is new: First time management guided next fiscal year growth rate, and guided it above current year — an unusually forward-leaning statement.

9. Quality of the Quarter

10. Balance Sheet Snapshot

Total debt of $3.9B is a legacy of the II-VI/Coherent merger (closed July 2022). Net leverage at 1.7x EBITDA is manageable and on a declining trajectory as EBITDA scales with revenue growth. FY2027 consensus EBITDA of $2.19B would reduce net leverage to ~1.4x even without debt paydown. The A&D divestiture ($400M proceeds) was used for Term Loan B prepayment, demonstrating active deleveraging discipline. Cash of $909M provides adequate liquidity for the InP capacity buildout.

11. Options & Volatility Diagnostics

Implied Volatility Event Profile

Positioning & Short Interest

Options positioning is modestly put-heavy (0.85 P/C ratio) but not extreme — consistent with a stock that has been volatile rather than directionally crowded. IV at 88.7% is elevated but below the 97% pre-earnings peak, suggesting the market is pricing ongoing uncertainty around the margin trajectory and AI demand durability. Short interest at 2.8% of float with less than 1 day to cover is negligible — no short squeeze dynamics at play.

Market Reaction vs. Benchmarks

Technical Levels

12. Stock Reaction Drivers

COHR's price action since earnings is a study in two-phase digestion. The initial -7.9% gap down reflected a market focused on margin disappointment — EBITDA missed by 8.4%, gross margin missed by 146 bps. For a stock trading at 36x forward earnings, profitability matters, and the market punished the miss immediately.

The V-recovery from $209 to $299 (+43% in 18 trading days) reflected the demand thesis overpowering the margin concern. Three catalysts drove the reversal:

• FY2027 growth acceleration guidance sank in. The initial reaction focused on Q2 margins; the subsequent recovery reflected investors modeling the forward trajectory. If FY2027 growth exceeds FY2026, the current multiple is cheap relative to the growth rate.
• Sector-wide AI infrastructure momentum. COHR's recovery coincided with broader optical/AI infrastructure enthusiasm — LITE rallied +28% over the same period. The Mar 2 spike to $299 appeared technically driven (momentum/short-covering) rather than COHR-specific.
• Estimate revisions confirmed the beat was structural. NTM EPS revised up 6% and held, confirming the Street viewed the demand beat as durable.

The -21% pullback from $299 to $236 (Mar 2-6) mirrors the exact pattern seen in VIAV, LITE, and other optical names. The Mar 2 sector-wide spike appears to have been a momentum overshoot driven by technical factors (possibly options gamma, sector rotation, or large block trades) rather than fundamental news. The reversal is a normalization, not a fundamental deterioration. RSI has reset to 49 — neutral territory.

13. What Mattered Less Than It Appeared

• OCS customer count expansion (7→10+): Sounds impressive, but OCS revenue remains immaterial. Anderson continues to deflect on revenue quantification. This is a CY2027+ story — useful for narrative, not yet for models.
• Munich divestiture: Portfolio cleanup but only ~$25M/quarter revenue removed. Modest accretion to margins and management attention.
• 1.6T vs 800G mix decomposition: Analysts spent significant Q&A time on this. Anderson's answer was essentially "both are growing, we make money on both." The mix matters less than total TAM growth at this stage of the cycle.
• Industrial/Semicap recovery: Orders picking up, but revenue impact is the June quarter and beyond. Industrial is less than 30% of revenue and declining in mix relevance as data center accelerates.
• GAAP EPS volatility ($0.76 vs Q1's $1.19): Entirely driven by non-cash II-VI merger amortization and restructuring charges. The market prices COHR on adjusted earnings and should continue to do so.

14. Post-Print Analyst Activity

15. Peer & Sector Read-Through

COHR is the YTD laggard (+27.7% vs LITE +51.5%, VIAV +56.5%, IPGP +68.6%), creating a potential catch-up trade if execution continues. On forward P/E, COHR (36.4x) trades at a meaningful discount to LITE (47.6x) despite similar end-market exposure and arguably stronger demand visibility (4x+ book-to-bill vs LITE's ~2x). The discount likely reflects: (1) II-VI merger integration overhang and leverage concerns; (2) gross margin gap (COHR 37% vs LITE 43%); (3) more complex portfolio (industrial, SiC legacy) diluting the pure-play AI narrative.

Read-Through: COHR's results confirm that AI data center optical demand is broad-based and accelerating — not limited to transceivers but extending to CPO, OCS, InP substrates, and field monitoring. The 4x+ book-to-bill and CY2028 visibility extension are the strongest demand signals in the optical supply chain. The InP supply/demand imbalance extending "past next calendar year" is a read-through for the entire 800G/1.6T ecosystem — capacity constraints imply pricing stability and potential upside for all InP-dependent vendors.

16. Investment Implications

Near-Term (Next 1-3 Months)

The -21% pullback from $299 to $236 has reset the stock to a more defensible level. At 36.4x forward P/E with 40% FY2027 EPS growth, COHR trades at less than 1x PEG — historically cheap for a company with this growth profile and demand visibility. Q3 earnings (early May) is the next major catalyst. If revenue exceeds the guidance midpoint of $1.77B and margins demonstrate the six-inch InP cost improvement, PT upgrades should follow. The key near-term risk is whether the Mar 2-6 selloff was a sector-wide optical de-risking or the beginning of a longer correction.

Medium-Term (3-12 Months)

Four variables determine the medium-term trajectory: (1) Whether gross margins cross 40% sustainably — the 42%+ target becoming achievable would be a re-rating catalyst; (2) Whether CPO revenue materializes on schedule in late CY2026 — this validates the next growth vector and expands TAM; (3) Whether the FY2027 guidance at Q4 earnings (August) confirms the "growth exceeding FY2026" statement — this is the big forward catalyst; (4) Whether InP supply/demand remains tight — sustained constraints support pricing power and customer captivity.

Bull Case

• Accelerating revenue growth: FY2027 > FY2026 guidance with 4x+ book-to-bill and visibility to CY2028
• Six-inch InP creates structural cost moat — yields exceeding 3-inch, roughly half the cost, competitors years behind
• CPO + OCS represent $2B+ incremental TAM on top of transceiver growth
• InP supply/demand imbalance extending past CY2027 → sustained pricing power
• Operating leverage from GM expansion (39% → 42%+) and SG&A leverage (9.6% → 8%)
• U.S. manufacturing footprint advantaged in current geopolitical environment
• YTD laggard vs peers (+27.7% vs avg +58.9%) → catch-up potential
• Bull scenario FY2027: Revenue $9B+, GM 42%+, EPS $8+, stock at $280-$360 (35-45x)

Bear Case

• 4x+ book-to-bill could indicate double-ordering ahead of perceived shortages — demand pull-forward risk
• CapEx ramping with FCF compression — free cash flow yield may deteriorate before margin expansion kicks in
• $3.9B total debt from II-VI merger constrains financial flexibility and M&A optionality
• Gross margin guide range (38.5-40.5%) is wider than Q2 actual — mix headwinds possible
• No visibility on China competitive threat — Chinese transceiver vendors could compress 800G pricing as technology matures
• "Extraordinary" tone language is historically a late-cycle indicator — peak sentiment risk
• OCS and CPO timelines remain uncertain — revenue starts late CY2026 but ramp profiles unclear
• Bear scenario FY2027: Revenue $7.5B, GM 38%, EPS $5.50, stock at $137-$165 (25-30x)

Conviction Assessment

This was a thesis-acceleration quarter. The combination of FY2027 growth exceeding FY2026, 4x+ book-to-bill, CPO mega-order, and InP supply advantage creates the strongest fundamental setup in COHR's post-merger history. The margin miss was the one blemish, but the trajectory (470 bps improvement, six-inch benefits ahead, SG&A leverage) is clearly positive. At 36.4x forward with 40% EPS growth, the PEG ratio is attractive. The YTD underperformance vs peers (+27.7% vs avg +58.9%) may represent a catch-up opportunity. The key debate is whether the InP supply/demand narrative is a genuine multi-year structural advantage (bull case) or a cyclical peak that will mean-revert as competitors expand capacity (bear case). Anderson's "doesn't rebalance this year or next year" statement is the most important data point in that debate.

17. What to Watch Next

18. Appendix

Senior Executives

Research Analysts on Q2 FY2026 Call

Volume Analysis — Notable Days

What Management Did Not Address

• No specific OCS revenue quantification despite multiple analyst attempts
• No breakdown of 800G vs 1.6T revenue split
• No discussion of China competitive threat from Chinese transceiver vendors
• No tariff impact discussion (was prominent in Q3/Q4 FY2025)
• Specific CPO purchase order dollar value not disclosed despite "massive" characterization
• SiC/EV business barely mentioned — folded into industrial with minimal commentary

19. Sources

Sources: Bloomberg, Coherent Corp Q2 FY2026 Earnings Call Transcript (February 4, 2026), Coherent Corp Q1 FY2026 Earnings Call Transcript (November 5, 2025), Coherent Corp Q4 FY2025 Earnings Call Transcript (August 2025), Coherent Corp Q3 FY2025 Earnings Call Transcript (May 2025)