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brokerjames

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Founder of 13Radar.com, a platform that provides real-time access to hedge fund portfolios through SEC 13F filings. Passionate about transparency and data-driven investing, I focus on building tools that empower investors with verified insights, historical tracking, and intuitive analytics. With a background in product design and financial data optimization, I’m committed to making institutional-grade information accessible and actionable for a broader community of investors.

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www.13radar.com 5mo ago

Show HN: A modern alternative to OpenInsider, with more transaction types

brokerjames

6pts8

www.13radar.com 8mo ago

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

brokerjames

7pts2

Show HN: A modern alternative to OpenInsider, with more transaction types 5 months ago

Thanks

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Show HN: A modern alternative to OpenInsider, with more transaction types 5 months ago

Thanks so much — really glad the categorization is helping cut through the noise.

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Show HN: A modern alternative to OpenInsider, with more transaction types 5 months ago

Thanks! OpenInsider is absolutely the OG in this space. To answer your questions: Latency: We poll the SEC RSS feed continuously. The parsing logic (classifying the transaction types) takes a few seconds. So, while not 'HFT real-time' (microseconds), it is 'human real-time' (usually appearing on our site within seconds of the SEC publishing). Sufficient for manual analysis, but maybe not for algos front-running the market. Business Model: We plan to keep the web interface (including the granularity and filters) free for public research. We believe this level of data transparency should be the standard. Our plan for a future 'Pro' tier focuses on automation and convenience, such as: Real-time Email alerts for specific tickers/insiders. API access for developers. Bulk CSV exports for backtesting. The goal is to make the best research tool free, and charge for the infrastructure tools."

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Show HN: A modern alternative to OpenInsider, with more transaction types 5 months ago

Hi HN, OP here. OpenInsider is great and inspired this, we just wanted to modernize the stack. We focused on parsing Form 4s with more granularity (distinguishing grants/options from open market buys) and building a faster, mobile-friendly UI. Would love to hear your feedback on the data accuracy!

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Show HN: An A2A-compatible, open-source framework for multi-agent networks 8 months ago

Nice work — making multi-agent networks A2A-compatible in an open-source framework looks very promising.

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Ask HN: What Are You Working On? (Nov 2025) 8 months ago

Your website grew to several thousand UVs per month in just two months — that’s impressive!

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Ask HN: What Are You Working On? (Nov 2025) 8 months ago

I’ve been working on http://www.13radar.com for the past 4 months, and we launched about two weeks ago. The platform tracks hedge fund portfolios in real-time based on SEC 13F filings.

I’m responsible for product research, analysis, design, development, and promotion. Most of the workflow was powered by AI tools — more than 60% of the research, design, and coding involved AI assistance. Initially we used Bootstrap for responsive design, but later switched to a lighter TailwindCSS framework.

Right now traffic is very low (just a few dozen users per day), and I’m trying to figure out whether that’s a product issue or simply a lack of promotion. Honestly, it’s a bit discouraging, but I’m hoping to learn from feedback and iterate.

Curious if anyone here has experience growing early-stage products with niche financial data — how did you approach the balance between product refinement and marketing?

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