Insiders4 min readNVDA
NVIDIA cluster buy: three directors add after the pullback
A 7-day window of open-market purchases by multiple NVDA directors - what the Form 4 structure actually shows, and what it does not.
Insider filing analysis
Articles
Analysis of Form 4 clusters, STOCK Act disclosures, and Schedule 13D stakes - written as permanent, indexable research pages, not fleeting social posts.
Latest analysis
Congress3 min read
STOCK Act disclosure lag: when Congress trades hit the public record late
Congressional stock trades can surface weeks after execution. This case study maps a typical disclosure timeline under the STOCK Act and explains why lag is a first-class scoring input.
Activist4 min read
Reading a fresh Schedule 13D: stake size, urgency, and accumulation
Schedule 13D filings mark a beneficial owner crossing 5%. This note walks through stake size, purpose clauses, and accumulation velocity - the inputs behind the 13D Greediness Score.
Insider trading basics
New to SEC filings? Start with the plain-language explainers, then read the analysis above.
- What is a SEC Form 4?A Form 4 is the document a company insider (officer, director, or 10%+ owner) must file with the SEC within 2 business days of buying or selling their company’s stock.
- What is a cluster buy?A cluster buy is when three or more different insiders of the same company buy its stock within a short window (7 days on this site).
- The Greediness Score: explainable insider trading scoresThe Greediness Score is a transparent 0-100 rating of how much structural conviction a public filing shows - who traded, how unusually large the trade was for that person, how fast it was disclosed, and who traded alongside them.
Topic clusters
Crawlable entry points into related research. Each tag page lists every published article in that cluster.