Show HN: 13Radar – Real-Time Hedge Fund Portfolio Analytics

13radar.com

7 points by brokerjames 10 hours ago

Hi HN,

We’re a small team working on 13Radar.com, which we launched about two weeks ago after 4 months of development. I’m the founder, and together with the team we’re building a platform that tracks hedge fund portfolios in real-time based on SEC Form 13F filings.

AI has been a major helper in our workflow. For a single webpage, we often consult multiple AI systems in parallel, generating different versions and comparing them side by side before deciding on the final design or implementation. More than 60% of the research, design, and coding involved AI assistance. For UI design we used Readdy, which gave us a smooth design experience. We experimented with Google Gemini and ChatGPT for research and prototyping, while most of the coding was done with Claude Code (Trae). On the front-end, we started with Bootstrap but later switched to TailwindCSS for a lighter, more responsive framework.

Features so far:

Real-time tracking of hedge fund holdings from SEC 13F filings

Portfolio changes per quarter (new positions, increases, reductions, exits)

Sector-level insights and trend analysis

Historical tracking and backtesting tools

Next steps:

Implementing pricing and subscription features

Adding email notifications and report export

Expanding analytics with insider transaction data

Continuing to refine usability and performance

We’d love feedback from the community:

Does this solve a real pain point for investors/researchers

Any thoughts on improving positioning or usability

Suggestions for features that would make this more useful

Thanks for reading — and if you’re curious, feel free to check out the site and let us know what you think.

EvansWilson 10 hours ago

This is a great start! One feature that I think would be a game-changer is moving beyond a single-fund view to see what the 'smart money' is thinking collectively. For instance, have you considered a dedicated 'Star Manager' page? You could track the latest moves from top investors like Buffett, Dalio, and Ackman. The real killer feature wouldn't just be showing their portfolio changes, but also integrating summaries of their public letters or recent interviews. That way, users could connect the what (the trade) with the why (their thesis) all in one place.

mark88889 10 hours ago

That's cool! Better than other complicated stock trackers.