Show HN: Realtime 13Fs and track live institutional ownership for any ticker
GodelNumbering Tuesday, February 03, 2026What it does:
- Polls SEC continuously at small intervals
- Fetches all variants of the 13F since the last poll
- Resolves every filing to its effective manager (one filing can contain data for multiple filers or proxy statements)
- Resolves every ticker in each filing to its effective instrument
- Updates the holdings data for the filer (e.g. https://www.signalbloom.ai/13f/filer/point72-asset-managemen...)
- Updates the ticker's 'current view' (re-calculating the aggregate current ownership live) e.g. https://www.signalbloom.ai/13f/ticker/NVDA
- Majority of 13F filers are also registered investment advisers, it links them intelligently (e.g. Blackrock as a 13F filer https://www.signalbloom.ai/13f/filer/blackrock-fund-advisors vs Blackrock as Investment Adviser https://www.signalbloom.ai/investment-adviser/blackrock-fund...)
Reports for: Every single one of over 10k asset managers that files 13F
Completely Free to use for non-commercial uses! Would love to get your feedback as I just finished building this. Thank you!