Massachusetts’ top securities cop has charged two broker-dealers and two advisors for deceptive and unethical conduct, making it the first case in which the regulator goes after firms employing rogue brokers.

In June, Massachusetts Secretary of the Commonwealth William Galvin announced an industry sweep, requesting information from 241 undisclosed brokerages where 15% of the reps had disclosure incidents, as reported previously.

Galvin’s complaint against Spartan Capital Securities centers on its CEO Dean Kajouras and another unnamed broker, both of whom had several disciplinary actions on their records.

The unnamed rep allegedly over-concentrated funds of an elderly client in risky investments and proceeded to churn the account. According to the complaint, Kajouras took over the account when the rep left the firm and ended up putting the bulk of the client’s funds into a firm that eventually went bankrupt.

During the sweep that started in June, Spartan told Galvin’s office that it had brought on 60 reps with prior disciplinary records in the previous two years, but only put six of them under extra supervision, according to the complaint. The regulator is seeking to bar both the broker and the firm from doing business in Massachusetts and collect a fine and restitution.

The second complaint targets Revere Securities and Jonathan Altman and also involves an elderly client whose account was churned.

Altman’s disciplinary record includes complaints of excessive trading and unsuitable or unauthorized transactions, but the broker was able to stay in the business by jumping from firm to firm, according to the complaint. Revere, meanwhile, said it continues to hire reps with disciplinary records. Galvin’s office is seeking to bar Altman but is only calling for a cease-and-desist order and an independent compliance review against the firm, as well as fines, disgorgement and restitution from both.