What smart money is saying about Lumentum
2 funds in our archive have pitched Lumentum — most recently Blue Whale Growth Fund in June 2026.
Lumentum Holdings Inc., established in 2015 and headquartered in San Jose, California, is a global leader in optical and photonic product manufacturing. The company's reach extends across the Americas, Asia-Pacific, Europe, the Middle East, and Africa. Lumentum operates through two principal business units: Optical Communications (OpComms) and Commercial Lasers. The OpComms segment develops and supplies components, modules, and subsystems essential for transmitting video, audio, and data across high-capacity fiber optic networks. Its offerings encompass a wide range of products, including tunable transponders, transceivers, and transmitter modules, alongside various tunable lasers, receivers, and modulators. Furthermore, this segment provides critical transport products such as reconfigurable optical add/drop multiplexers (ROADMs), optical amplifiers, and optical channel monitors. A comprehensive suite of components is also available, featuring 980nm, multi-mode, and Raman pumps; switches; attenuators; photodetectors; gain flattening filters; isolators; wavelength-division multiplexing (WDM) filters; arrayed waveguide gratings (AWGs); multiplex/de-multiplexers; and integrated passive modules. Distinctive innovations from this segment include the Super Transport Blade, which integrates multiple optical transport functions into a single unit; vertical-cavity surface-emitting lasers (VCSELs); directly modulated and electro-absorption modulated lasers; and advanced laser illumination sources for 3D sensing systems. OpComms serves key clientele in the telecommunications, data communications, consumer, and industrial markets. Conversely, the Commercial Lasers segment produces an array of laser technologies, such as diode-pumped solid-state, fiber, diode, direct-diode, and gas lasers. These are primarily utilized in original equipment manufacturer (OEM) applications. This segment's laser solutions cater to a broad spectrum of markets and uses, including sheet metal processing, general manufacturing, biotechnology, graphics and imaging, remote sensing, and precision machining.
Get an email when a fund writes about it
Position history
Between Q3 2025 and Q2 2026, 6 fund letters reported a position in Lumentum — 5 opened or added to the position, 1 trimmed or exited.
| Quarter | Letters | Bought | Sold | Theses |
|---|---|---|---|---|
| Q2 2026 | 6 | 5 | 1 | 1 |
| Q3 2025 | 0 | 0 | 0 | 1 |
Fund activity · 6 positions · 6 moves
- New positionClearBridge Investments Growth StrategyJune 2026
“In addition to the transactions mentioned above, the Strategy initiated positions in Credo Technology and Lumentum in the IT sector.”
Read the letterLumentum - June 2026
“We added to Cisco Systems and Lumentum Holdings, reflecting our improving conviction in their respective wealth creation outlooks and attractive valuations.”
Read the letterLumentum - June 2026
“We continued to upgrade the portfolio, increasing exposure to areas where we see stronger long-term wealth creation opportunities and more attractive risk-reward characteristics. We added to Cisco Systems, Lumentum Holdings and Hannover Re, reflecting improving conviction in their respective wealth creation outlooks and attractive valuation support.”
Read the letterLumentum - June 2026
“We added to Cisco Systems and Lumentum Holdings, reflecting our improving conviction in their respective wealth creation outlooks and attractive valuations.”
Read the letterLumentum - June 2026
“We added to Cisco Systems, Lumentum Holdings and Hannover Re, reflecting improving conviction in their respective wealth creation outlooks and attractive valuation support.”
Read the letterLumentum - TrimmedBaron Technology ETFJune 2026
“We trimmed our positions in Datadog, Inc. and Lumentum Holdings Inc. following meaningful appreciation in both stocks that, in our view, left near-term upside more limited relative to our other holdings.”
Read the letterLumentum
Also mentioned · 1
These funds discuss Lumentum — as a competitor, benchmark or comparable — without disclosing a position in it.
- MentionedBlue Whale Growth FundJune 2026
“Company: Lumentum Sector: Industrials Company Size: $67bn Powering the future of AI infrastructure with critical optical connectivity As AI clusters scale to unprecedented sizes, traditional copper interconnects are hitting physical limitations. Over even short distances, high-speed electrical signals become heavily distorted, requiring power-hungry booster chips that generate excess heat – a major bottleneck for power-constrained data centres. Lumentum provides the vital solution by converting data into light.”
Read the letterLumentum
Fund coverage · 2 theses
- Blue Whale Growth FundJune 2026
Lumentum is positioned as a leading optical connectivity supplier benefiting from AI cluster growth and the shift away from copper.
Read the full thesis - Baron Technology FundSeptember 2025
Lumentum Holdings Inc. is a leading photonics company poised to capitalize on the growing demand for advanced laser technologies in data centers and emerging markets driven by AI infrastructure.
Read the full thesis
Read every full thesis on Lumentum
Unlock all 2 theses — the full reasoning behind what funds are buying, plus unlimited access to the entire archive.
View plans→