An insider must report a trade on Form 4 within two business days, and the form becomes public the moment EDGAR accepts it. The time column above is that acceptance stamp, not the trade date: the trade itself may be up to two days older, and the filing tells you which.
Not every row is a signal. Codes A, M and F are compensation mechanics: grants, option exercises and shares withheld for tax. The rows worth reading first are the open-market buys (code P), where an insider chose to pay the market price with their own money. What each transaction code means
For the buy-side view with scoring, see the latest purchases or this week's top insider buys.