A Form 144 is filed when an affiliate intends to sell restricted or control securities under Rule 144. Unlike a Form 4, which reports a trade that already happened, a Form 144 is filed at or before the moment the sell order is placed - so it is the closest thing EDGAR has to advance notice. The approximate sale date on the notice is the filer's own estimate, and filing is not a commitment: some announced sales never execute.
Reading a notice alone can mislead. A scheduled 10b5-1 sale that was planned months ago carries little information; a discretionary sale filed the week after a price run-up carries more. Pairing each notice with the Form 4 that follows it - did the sale execute, at what price, and was it part of a plan - is what turns this feed into a signal, and that matched view is part of InsiderAlpha's paid research tools.
More on the difference between the two forms: Form 4 vs Form 144. For completed sales, see the insider selling feed.
Coverage: notices are tracked live from EDGAR since April 2026; filer and size details are parsed reliably since August 2026, and rows without them are excluded rather than shown blank. Every row links to its source document on SEC.gov.