A modern alternative to OpenInsider, with more transaction types

Details

External ID

46970235

Source

HN

Company

—

Product

A modern alternative to OpenInsider, with more transaction types

Website domain

13radar.com

Launched

Feb. 11, 2026

Cohort

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Upvotes

6

Upvotes percentile

0.28099730458221023

Tags

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Fetched at

Sept. 7, 2026, 9:25 p.m.

Updated at

Sept. 7, 2026, 9:25 p.m.

Description

Hi HN, I've been working on 13radar.com, a site focused on tracking institutional holdings. Today, I’m releasing a beta version of our new Insider Trading Tracker. Like many of you, I've used OpenInsider for years. It's a legendary tool, but the UI hasn't changed in decades, and the data classification can be broad. I wanted to build something that feels modern and digs deeper into the data. How it differs from existing tools (OpenInsider / GuruFocus): Granularity: We parse SEC Form 4 filings to categorize transactions into finer types. Instead of just "Buy/Sell," we try to distinguish specific grants, exercises, and other transactions more clearly than OpenInsider. Data Depth: We are displaying more transaction types than GuruFocus (which often aggregates or hides specific non-open-market actions). Modern UX: Fast filtering, clean mobile support, and a responsive interface. No 1990s table layouts. It's currently in Beta. We are still tuning the parsing logic for edge cases in SEC filings. I'd love to get your feedback on the data accuracy and the UI. Is there a specific filter or transaction type you find missing in other tools that you'd like to see here? https://www.13radar.com/insider/ Thanks!

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