What forms (S-1, 8-K, etc) and keywords in news headlines signify dilution?
Possibles: stock offering, secondary placement, increase authorized number of shares, shelf registration.
Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
What forms (S-1, 8-K, etc) and keywords in news headlines signify dilution?

### Response:
Possibles: stock offering, secondary placement, increase authorized number of shares, shelf registration.