Stock Split Calendar

A company divides each of its shares into several. In a 10-for-1 split, every share becomes 10, and the price of each falls to a tenth, so what you own is worth the same. Companies split after a long rise, to bring the price per share back down.

The opposite: shares are combined, and the price rises to match. In a 1-for-20 reverse split, every 20 shares become 1, priced 20 times higher. Most reverse splits are by small companies whose shares fell below $1, which an exchange can delist them for. That makes a reverse split more often a sign of trouble than of strength, and many of these stocks keep falling afterwards. Large companies sometimes do one after spinning off a business, to bring a lower price back up: Honeywell (1-for-2) and DuPont (1-for-3) in 2026.

The first day the stock trades at its split-adjusted price. From that day on, prices, charts and the share count are on the new basis. The announcement date is when the company made the split public.

Nothing you need to act on. Your broker adjusts the number of shares and the cost per share, and the total stays the same. In a reverse split, a fraction of a share left over is usually paid out in cash. Listed options are adjusted too: after a 2-for-1 split, one contract usually becomes two, each at half the strike price; an uneven split changes what one contract delivers instead.

Not by itself: the company is worth exactly the same before and after. A forward split does tell you the shares rose a lot, and a lower price can make them easier for smaller investors to buy. A reverse split tells you the price fell a long way.

The exchanges' own notices, checked against other sources every day. A split is listed once announced, and stays in the list after its ex-date.