About PortLens

What PortLens is

PortLens.io is a portfolio analyzer built and operated by Finsight Labs Ltd in London, registered in England and Wales (company 16941446). Enter tickers and share counts manually to see combined company exposure across supported ETFs and direct stocks, concentration, portfolio beta, and diversification. The free portfolio scan accepts up to 20 holdings without an account. A free account lets you save your holdings and removes that guest limit. No broker connection or CSV import is available. Each result states its coverage; resolving a fund does not guarantee that its published holdings cover every underlying asset.

PortLens is being developed for an international audience.

Why it exists

A ticker-level holdings list can hide shared exposure. If you hold VOO, VTI, and a few tech stocks, your broker shows you five neat positions — not the fact that you may hold the same handful of mega-caps four times over. Fund look-through analysis has long been standard at institutions; PortLens exists to make it an accessible check for individual investors.

How it compares with other tools

PortLens is narrow on purpose, and several better-known products cover some of the same ground on different terms. PortLens compared with five other portfolio tools sets out what each one measures, which parts are free, and — for each of them — what the other tool does that PortLens does not. Every claim about another product there was read from that product's own live pages, and carries the date it was checked.

Public filing examples

Explore the existing investor portfolios below. Each profile states its filing date and scope; disclosed holdings are a historical snapshot, not a live account or a recommendation.

• Berkshire Hathaway
• Bill Ackman
• David Tepper
• Li Lu
• Chris Hohn
• Chase Coleman
• Gates Foundation Trust

Who builds it

PortLens is built and operated by Finsight Labs Ltd, a UK company. How every metric is computed — data sources, formulas, refresh schedules, and known limitations — is documented in full on the Methodology page.

Editorial policy

Articles are written under the PortLens Team byline, the editorial team at Finsight Labs Ltd.

• Every article shows its publication date and, when substantively revised, its updated date. Product claims are checked against the implemented feature and its access tier. Numerical examples state their inputs, units, source dates and coverage; downloads are offered where retained inputs support reproduction.
• Claims are grounded in primary sources — SEC filings, US Treasury and BEA economic data, the Ken French factor library, fund prospectuses — and in the same computations that power the product, as documented in our methodology.
• Nothing we publish is investment advice or a recommendation to buy or sell any security. Educational content explains concepts and shows how to use analytics; what you do with your portfolio is your decision. See Disclosures.
• We don't run sponsored content, and no fund, broker, or issuer pays for coverage or placement in our analytics.
• Corrections: send the article URL, the claim and any supporting source to support@finsightlabs.co. We check the claim against its source and the product contract. A substantive correction gets a dated revision note explaining what changed; historical examples keep their original holdings dates.

Contact

Email support@finsightlabs.co for support, corrections, or anything else. See also Privacy, Terms, and Disclosures.