{"url":"https://etfiq.com/rankings/themes-largest-photonics","section":"rankings","title":"The largest photonics and optics ETFs | ETFIQ","description":"The largest photonics and optics ETFs, ranked by net assets, as of Oct 20, 2026. 3 funds from ETFIQ\u2019s own published figures.","as_of":"Oct 20, 2026","structured_data":[{"@type":"ItemList","name":"The largest photonics and optics ETFs","numberOfItems":3,"itemListOrder":"https://schema.org/ItemListOrderDescending","itemListElement":[{"@type":"ListItem","position":1,"name":"LAZR","url":"https://etfiq.com/funds/lazr"},{"@type":"ListItem","position":2,"name":"LYTE","url":"https://etfiq.com/funds/lyte"},{"@type":"ListItem","position":3,"name":"FOTO","url":"https://etfiq.com/funds/foto"}]},{"@type":"Dataset","name":"The largest photonics and optics ETFs","description":"The largest photonics and optics ETFs, ranked by net assets, as of Oct 20, 2026. 3 funds from ETFIQ\u2019s own published figures.","url":"https://etfiq.com/rankings/themes-largest-photonics","dateModified":"2026-10-20","creator":{"@id":"https://etfiq.com/#org"},"license":"https://etfiq.com/license/","isAccessibleForFree":true,"creditText":"ETFIQ (etfiq.com)","publisher":{"@id":"https://etfiq.com/#org"},"inLanguage":"en","creativeWorkStatus":"Published","distribution":[{"@type":"DataDownload","encodingFormat":"application/json","contentUrl":"https://etfiq.com/data/thematic.json"}],"variableMeasured":["Weight overlap with the S&P 500","Active share","Holdings","Top ten share of the fund","Total return","Fee for the differing part","Expense ratio"],"keywords":["exchange-traded funds","ETF","Thematic ETFs","fund data","SEC filings"]},{"@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"ETFIQ","item":"https://etfiq.com/"},{"@type":"ListItem","position":2,"name":"Rankings","item":"https://etfiq.com/rankings/"},{"@type":"ListItem","position":3,"name":"The largest photonics and optics ETFs","item":"https://etfiq.com/rankings/themes-largest-photonics"}]},{"@type":"WebPage","name":"The largest photonics and optics ETFs","description":"The largest photonics and optics ETFs, ranked by net assets, as of Oct 20, 2026. 3 funds from ETFIQ\u2019s own published figures.","url":"https://etfiq.com/rankings/themes-largest-photonics","dateModified":"2026-10-20","isPartOf":{"@type":"WebSite","name":"ETFIQ","url":"https://etfiq.com"},"speakable":{"@type":"SpeakableSpecification","cssSelector":[".lede"]},"publisher":{"@id":"https://etfiq.com/#org"}}],"characters":2567,"truncated":false,"content":"ETFIQ / Rankings / The largest photonics and optics ETFs \n \n As of Oct 20, 2026 . Rebuilt every trading night.\n The largest photonics and optics ETFs\n See 3 funds ranked by net assets. Updated Oct 20, 2026. Every fund here is sold on photonics and optics. What each one holds, and how much of it the S&P 500 already holds for you, is the column beside the size.\n The largest photonics and optics ETFs, ranked by net assets, as of Oct 20, 2026. Source: ETFIQ. # Ticker Fund Net assets Weight in S&P 500 companies Total return, 1Y Fee Source \n 1 LAZR Tema Photonics & Optical ETF $187m 22.5% too new 0.75% Issuer page, Oct 19, 2026 \n 2 LYTE Roundhill Photonics & Optics ETF $170m not yet filed too new 0.65% Issuer daily, Oct 20, 2026 \n 3 FOTO Tuttle Capital Pure Play Photonics ETF $167m 14.2% too new 0.75% SEC filing, Jun 30, 2026 \n \n Method\n The 3 ETFs in the photonics and optics theme, of which 3 publish net assets, ranked on the most recent figure for each. Across the funds listed here the weight held in S&P 500 companies runs from 14.2% to 22.5%. Size shows where the money is, not what a fund did. The list sorts one published figure, with no scoring or weighting. Every fund ETFIQ covers in this category is eligible, closed funds included.\n Where to next\n Every photonics and optics ETF and what it holds The thematic ETFs least like the S&P 500 Where these figures came from\n Fund holdings from SEC Form N-PORT and from the issuers own daily files SEC EDGAR, full-text search of fund filings SEC Form N-PORT, what a fund filed it holds Rule 19a-1, what a distribution notice must say ETFIQ links to the documents behind every figure; a link is not an endorsement.\n A ranking is not a recommendation or an opinion. ETFIQ is an independent publisher, not an adviser. Standards and sources \n Cite this page. ETFIQ, The largest photonics and optics ETFs, ranked by net assets, data as of Oct 20, 2026. https://etfiq.com/rankings/themes-largest-photonics Free to use with attribution for figures ETFIQ computes; issuer data stays under its owner's terms. The underlying files are at Open data .\n Other forms Plain ETFIQ, The largest photonics and optics ETFs, ranked by net assets, data as of Oct 20, 2026. https://etfiq.com/rankings/themes-largest-photonics APA ETFIQ. (Oct 20, 2026). The largest photonics and optics ETFs, ranked by net assets. Retrieved from https://etfiq.com/rankings/themes-largest-photonics Markdown [The largest photonics and optics ETFs, ranked by net assets (ETFIQ, Oct 20, 2026)](https://etfiq.com/rankings/themes-largest-photonics)","source":"ETFIQ, independent ETF data. Recomputed nightly from public filings and prices.","publisher":{"@id":"https://etfiq.com/#org","name":"ETFIQ","url":"https://etfiq.com"},"license":"https://etfiq.com/license/","license_text":"Figures ETFIQ computes are free to use with attribution: ETFIQ (etfiq.com). Issuer data stays under its owner's terms.","citation":"ETFIQ, The largest photonics and optics ETFs, ranked by net assets, data as of Oct 20, 2026. https://etfiq.com/rankings/themes-largest-photonics"}