SEC Form 4 · watched continuously
Insiders sell for many reasons. They buy for one.
Cluster Tape monitors every Form 4 filing hitting SEC EDGAR and posts the pattern worth knowing about: several insiders at the same company buying their own stock in the same week. Neutral data, straight from the filings, minutes after they land.
Real-time alerts on your tickers — email, Discord, or Telegram. No spam; one email when it ships.
The feed
Three kinds of post. Nothing else.
Every post states what was filed — who, how much, when, sourced to the filing. The feed is free and stays free.
Cluster buy
Several insiders, one company, one week
Three or more separate filings of open-market purchases at the same company within seven days. Rare enough to be news — about two dozen a week across the entire market.
AS FILED · MINUTES AFTER EDGAR
Notable buy
One large purchase, disclosed
A significant open-market buy by an officer, director, or major holder — their own money, on the record within two business days of the trade.
AS FILED · MINUTES AFTER EDGAR
Weekly roundup
The week in insider buying
Every Saturday: the week’s tracked open-market buying in one ranked card — totals, companies, and the filings behind them.
SATURDAYS
Why trust it
Built to not fool you — or itself.
Most “insider buying” noise isn’t conviction, it’s paperwork. The pipeline is engineered around the ways Form 4 data lies:
Coming next
The same signals, on your tickers.
The feed shows the whole market. Paid alerts will watch your list: any cluster buy or notable purchase on tickers you choose, delivered to email, Discord, or Telegram the moment it’s filed — with your own thresholds. Join the waitlist above and you’ll hear when it opens; waitlist members go first.