Stock splits
A corporate action in which a company divides its existing shares into multiple shares. Although the number of shares outstanding increases by a specific multiple, the total dollar value of the shares remains the same compared to pre-split amounts, because the split did not add any real value.
Reverse stock
A reverse stock split is a corporate action in which a company reduces the number of shares it has outstanding by a set multiple. This is the opposite of a stock split, in which a company increases its outstanding shares by a set multiple.