Methodology

Reverse stock splits of US-listed companies, including foreign issuers that file 6-Ks, from the first proposal to the first split-adjusted trade. Funds, ETFs and other non-equity securities are excluded. A depositary-share ratio change is labelled as one, because it is not necessarily a reverse split of the ordinary shares.

Split dates and ratios come from the market split calendar and are cross-checked against a second source. A split only one source evidences is shown and marked unconfirmed. The stage, approval route and board authority are read from the company's own documents: proxy statements, 8-Ks, 6-Ks and press releases, with the quote and the filing linked. Exchange deficiency notices come from a sweep of 8-K Item 3.01 filings. The AI summaries are Signal8's analysis of those filings and releases.

A split moves through these stages. Closed stages are kept, not deleted.

precursor

Precursor filing

proposed

Proposed in a preliminary proxy

definitive

Shareholder vote scheduled

revised

Proposal revised

postponed

Meeting postponed

adjourned

Meeting adjourned

consent_pending

Approved by written consent

voted_approved

Approved by shareholders

voted_failed

Not approved by shareholders

ratio_fixed

Ratio set by the board

date_announced

Effective date announced

charter_filed

Charter amendment filed

market_effective

Scheduled effective date reached

confirmed

Trading on the split-adjusted basis

failed

Closed: not approved

abandoned

Closed: abandoned

authority_expired

Closed: authority expired

postponed_indefinitely

Closed: postponed indefinitely

superseded

Closed: superseded

postmortem_only

Recorded after the fact

An effective date that depends on a condition is shown as conditional, with the condition quoted, never as a date. A ratio range is shown as a range. A ratio that cannot be stated exactly from the stored value is not rounded into a neat one.

The 2-year cumulative reverse ratio is stated only when two sources agree on every reverse split in the window. Otherwise the page says it is not stated. Stock dividends, spin-off factors and tiny consolidations that appear in vendor split data are not counted as splits.

A missing value is shown as "Not measured", never as zero, and an empty list on a ticker page means nothing is on record in our data, which is not proof that nothing happened.

Prices are as traded on the split's own basis: the first post-split close is the base, and the last pre-split close is moved onto the same basis by the split ratio. The move is shown per split, from the first post-split close to the last close in the next 30 days. It is withheld when another split or a stock dividend falls in the window, or when there is no price bar.

We do not publish an average or a win rate. Many issuers delist after a split, and a figure over the survivors would overstate how reverse splits perform.

Float before and after a split comes from a daily float record that began in mid-2026 and is not backfilled, so older splits have no sample. Each sample is on the split basis of its own date, so the two sides are not the same unit.

Listing context lists exchange deficiency notices we found. No notice means none was found in that sweep. It does not mean the company meets the listing standards.

AI summaries can be wrong or incomplete. Each one links to its source. Read the filing before relying on it.

Data is read from public filings and exchange data and can be late. The calendar says scheduled, never confirmed. This is not investment advice and nothing here recommends buying or selling a security. Spotted an error? Write to [email protected] with the ticker and the filing, and we will check it.