The Financial Industry Regulatory Authority has fined 12 broker-dealers a total of $2.6 million for failing to give breakpoint discounts on sales of unit trusts.

The settlements, announced Tuesday, also require the firms to pay restitution of more than $4 million to customers. The broker-dealers have already paid back the affected clients, according to settlement documents.

For most of the firms, the missed breakpoints occurred between May 2009 and April 2014.

In settling the cases, the broker-dealers neither admitted nor denied the charges.

Finra imposed sanctions on the following firms:

• First Allied Securities Inc. ($689,647 in restitution, $325,000 in fines).

• Cetera Advisors LLC  ($452,622, $250,000).

• Cetera Advisor Networks LLC ($151,108, $150,000).

• Fifth Third Securities Inc. ($663,534, $300,000).

• Securities America Inc. ($477,686, $275,000).