Last updated: 16 August 2026
WhaleFilings tracks what large investors actually own and actually traded — ARK Invest's daily ETF disclosures, and the quarterly SEC 13F filings of funds like Berkshire Hathaway and Scion Asset Management. It's free, it doesn't require an account, and it isn't affiliated with any of the firms it covers.
Why this site exists
Institutional holdings data is public. ARK publishes its ETF holdings every trading day; every large fund files a 13F with the SEC each quarter. But the raw form of that data is a CSV and an EDGAR filing — and the tools that make it readable mostly cost a few hundred pounds a month, aimed at professionals.
I built WhaleFilings because I wanted to follow this data myself and didn't want to pay terminal prices for it. Everything on the site is derived from those free public sources. If you want to see exactly how, that's written up on the methodology page.
Who writes this
WhaleFilings is written and run by one person, under the name Theo Ledger.
Theo Ledger is a pen name. I'm a UK-based solo founder and I write under a pseudonym for privacy, not to hide anything about how the site works. I want to be plain about what that does and doesn't mean: I'm not a financial adviser, not an analyst, and I don't work in the industry. I have no professional qualification in finance and I'm not authorised by the FCA. I'm someone who reads filings carefully and built a tool to make them easier to read.
You can see the same person posting daily about this data on X at @theoledgers. If you want to check whether the site's analysis holds up, that's the running public record.
How the content is made
Being straightforward about this, because it affects how much weight you should give it:
- Data pages — holdings tables, trade lists, charts, and historical positions are generated automatically from the source filings. No human writes these; they're a direct rendering of ARK's published CSVs and SEC filings.
- Articles and analysis — drafted with AI assistance and edited before publication. Any numbers in them come from the same filings behind the data pages.
- What we don't do — we don't take payment to feature a stock, fund, or view, and no third party gets to approve anything before it goes up.
How the site makes money
WhaleFilings is free to use. It's funded by advertising and by affiliate commissions on some broker links — if you open an account through one of those, the site may earn a commission at no extra cost to you. That never changes which platforms are listed or what's said about them. Full detail is in the terms.
This is not financial advice
Nothing here is financial, investment, legal or tax advice — it's public data and general commentary, published for educational purposes. Past performance doesn't predict future results, and the value of investments can go down as well as up. Knowing what a fund bought tells you nothing about whether it was a good idea, or whether it suits you. If you're making a decision with real money, speak to an FCA-authorised adviser.
Corrections and contact
If something on the site is wrong, I want to know — data errors get fixed and articles get corrected. The fastest route is the contact page, or email hello@whalefilings.com.