Weighted-Average Shares Outstanding (Diluted): The number of shares held by shareholders including insiders but not including a company's treasury shares assuming conversion of all convertible debt, securities, warrants and options, sourced from the company 10-K or 10-Q SEC reports.

Proto Labs, Inc. (PRLB) had Weighted-Average Shares Outstanding (Diluted) of 24.29M for the most recently reported fiscal quarter, ending 2026-03-31.