The Securities and Exchange Commission on Tuesday filed 26 enforcement actions against 82 people in its second nationwide sweep against fraud in brokering stock of very small companies.

The SEC said that defendants in the latest "microcap" cases "profited by more than $12 million and cost investors untold millions." The agency said the alleged violations included "pump and dump" schemes in which stock prices are manipulated through deceptive practices.

In its first sweep against microcap fraud last September, the regulator filed 13 actions against 41 people, alleging more than $25 million of microcap fraud.

Subscribe Now

Access to authoritative analysis and perspective and our data-driven report series.

14-Day Free Trial

No credit card required. Complete access to articles, breaking news and industry data.