13F.info

What it is

A clean front end over the SEC's 13F filings, run by one person. Pick a manager and you get every quarter they have filed; pick a quarter and you get the holdings table, sortable, with the position value, portfolio weight, share count and whether the line is an option. Three joins on top make it more than a filing viewer: compare a manager's two quarters side by side, follow one manager's position in a single CUSIP through time, or list every manager reporting that CUSIP in a given quarter.

It is the least commercial thing in this category. No account, no plan, no ads on the pages checked, and the whole Rails app — the EDGAR downloader, the parser and the front end — published under MIT.

Data & coverage

13F only, plus a separate Form D browser for private offerings filterable by name, industry, geography and entity type.

History starts in 2014. That boundary is the SEC's, not the author's: structured XML became mandatory for 13F then, and everything before it is free text that somebody has to parse into shape. Vendors who sell depth sell exactly that work — WhaleWisdom goes back to the quarter ending March 2001 and charges $300 a year for it.

Freshness is bounded by the filing rule rather than by the site. A 13F is due 45 days after quarter end and most managers file on the last day; second-quarter 2026 filings were visible here in September 2026. The site publishes no ingestion schedule and no lag figure, so treat "a few days after it lands on EDGAR" as an observation rather than a commitment.

Integrations

None, in the normal sense. No documented API, no CSV or Excel export, no alerts, no add-in.

The substitute is the licence. The repository holds the full application — a back end that pulls 13F data from EDGAR into PostgreSQL and a front end over it — and the README's own suggestion is that the useful part for most people is the pipeline, not the site. If you need the data in bulk and do not want to write an EDGAR parser, that is the offer, and it is a better one than an export button.

Limitations

• 2014 onward, and no earlier. The single biggest gap against paid alternatives.
• No API, no export. The undocumented endpoint behind the holdings table is not a product and can change or close without anyone being told.
• One filing type. No Form 4, no 13D/G, no congressional disclosures, no non-US holdings.
• No entity, no terms, no support. The About page is written in the first person and names an individual. There is no company, no service commitment, and no page to read before you build a workflow on it.
• The code has not moved since August 2024 while the site keeps ingesting. That is a well-behaved side project, and it is also the profile of something that stops one day without an announcement.
• 13F's own blind spots apply and no tool fixes them — long US-listed positions only, filed at the firm level, up to 45 days stale before it is published.

Alternatives

WhaleWisdom is the paid version of this job — 2001 onward, an API, an Excel add-in and a backtester, from $300 a year. HedgeFollow covers more funds and adds insider and congressional filings on the same page, with the depth behind a $15 to $66 tier. Dataroma is the other free one and answers a narrower question — 83 named value investors rather than every filer. Quiver Quantitative is the one to take if 13F is only one of several disclosure datasets you need over an API. The rest of the category is at insider, 13F and congressional trade trackers.