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Compounder
Free superinvestor 13F holdings, made readable
Compounder turns SEC 13F filings into clean, readable pages. See what investors like Buffett, Ackman, and Li Lu hold, what they bought and sold this quarter, and which stocks multiple funds are buying. Data straight from public SEC filings. Free, no account. Educational tool, not investment advice.
Hey everyone 👋
I built Compounder because I kept wanting a simple answer to one question: what are investors like Buffett, Ackman, and Li Lu actually holding right now?
That info is public — funds file it with the SEC every quarter — but it's scattered across messy filings or stuck behind paywalls. So I made the clean, free version I wished existed.
It shows each investor's full portfolio, what they bought and sold this quarter, and which stocks multiple funds are buying at the same time. Data is straight from SEC 13F filings.
Built most of it with AI, after hours. Still rough in places and I'm improving it every week. Would love your feedback.
(It's a data/education tool, not investment advice.)
About Compounder on Product Hunt
“Free superinvestor 13F holdings, made readable”
Compounder was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #64 on the daily leaderboard. Compounder turns SEC 13F filings into clean, readable pages. See what investors like Buffett, Ackman, and Li Lu hold, what they bought and sold this quarter, and which stocks multiple funds are buying. Data straight from public SEC filings. Free, no account. Educational tool, not investment advice.
On the analytics side, Compounder competes within Investing, Finance and Data Visualization — topics that collectively have 36.3k followers on Product Hunt. The dashboard above tracks how Compounder performed against the three products that launched closest to it on the same day.
Who hunted Compounder?
Compounder was hunted by Junlin Zhu. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of Compounder including community comment highlights and product details, visit the product overview.
Junlin Zhu