A reverse split combines several shares into one: after a 1-for-10 split, ten shares become one and the price rises roughly tenfold, while the company's value does not change. Nasdaq and NYSE companies whose stock trades below $1 for an extended period receive a deficiency notice and often use a reverse split to regain compliance.
The usual sequence is a proxy proposal (PRE/DEF 14A), the shareholder vote (8-K item 5.07) and the charter amendment that makes it effective (8-K item 5.03). Because financings often follow, the page also lists companies with both reverse-split and dilution filings.
Compiled from public SEC EDGAR data. Times are US Eastern. Titles link to the original filing on sec.gov. Information only — not investment advice. Updated: