Fabrinet Sees Unstoppable AI Demand as Major Hedge Funds Triple Their Stakes

Citadel and Millennium Make Massive Bets on Fabrinet

Citadel Advisors and Millennium Management dramatically increased their stakes in Fabrinet during Q2 2026, according to Form 13F filings1

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. Citadel's position surged by 2,957%, jumping from 4,963 shares to 151,705 shares, with the holding's value climbing from $2.6 million to $85.3 million1

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. Millennium Management also expanded significantly, increasing holdings from 61,692 shares to 164,313 shares, raising the position value from $32.2 million to $92.4 million1

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. AQR Capital Management joined the trend, lifting its stake from 71,849 shares to 79,795 shares1

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. These portfolio moves came weeks before the optical manufacturing specialist delivered record financial results driven by AI infrastructure buildout.

Data Center Interconnect Business Hits $1 Billion Run Rate

Fabrinet's data center interconnect business reached a $1 billion run rate by the end of fiscal 2026, representing 140% year-over-year growth2

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. Speaking at Rosenblatt's 6th Annual Technology Summit, management revealed that data center applications now account for 51% of fiscal 2026 revenue1

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. The company's communications infrastructure segment grew 40% year over year, while full-year fiscal 2026 revenue climbed 36% following 19% growth in fiscal 20252

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. Fourth-quarter fiscal 2026 revenue implied an annualized run rate of approximately $5.3 billion2

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. Management indicated that fiscal 2027 growth could exceed fiscal 2026's 36% pace, though it stopped short of providing specific forecasts2

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Diversified Customer Base Beyond Nvidia

Fabrinet's AI-related infrastructure revenue stream has broadened significantly beyond a single hyperscale customer. Chief Financial Officer Csaba Sverha disclosed that four customers now represent 10% or more of total revenue: Cisco at 20%, Nvidia at 16%, Nokia at 11%, and Amazon at 11%1

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. Management emphasized that Fabrinet is not a proxy for Nvidia despite the chip giant remaining an important customer2

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. The datacom business now includes three broad customer groups: the original hyperscale customer, merchant transceiver makers, and hyperscale direct customers2

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. A second merchant transceiver vendor is expected to begin production in the December quarter, with initial demand centered on 800-gig short-reach transceivers before moving toward 1.6T products2

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Aggressive Capacity Expansion to Meet AI Demand

Fabrinet is executing an aggressive expansion plan to meet surging AI demand. Current capacity at the end of fiscal 2026 stood at approximately $5.8 billion, but the company expects to reach about $9.8 billion by early calendar Q1 2027—an 85% increase2

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. Additional capacity expansion is planned beyond that milestone2

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. CapEx is expected to remain around $250 million in fiscal 2027, similar to the prior year2

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. Despite heavy investment that resulted in prior-year free cash flow of only $4 million, the company maintains a return on invested capital near 40%2

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. To support growth, Fabrinet secured a $75 million term loan from a Thai bank in August 2026 and is expanding credit lines2

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Optical Networking Solutions Solve Data Center Power Constraints

Fabrinet's optical networking solutions address a critical bottleneck in AI infrastructure deployment. Management explained that 400ZR, 800ZR, and ZR+ products help solve power-distribution problems in large data centers2

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. As power limits at substations become constraints, customers are spreading data centers geographically and linking them with data center interconnect equipment2

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. The company manufactures both pluggable modules and component content, creating what management described as a "sticky" business model2

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. Multi-rail technology is under development with several customers, though timing will be announced by customers rather than Fabrinet2

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. Beyond data center applications, the company is seeing growth in automotive, industrial lasers, low Earth orbit satellites, optical coherent switches, and emerging quantum compute applications2

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