Pensions minister Steve Webb has admitted the government needs to do more to prevent consumers being auto-enrolled into "dodgy" pension schemes.
Corporate pension sales at Prudential have dipped to £148m for the first nine months of this year, its third-quarter results have shown.
Sainsbury's defined benefit scheme deficit has risen to £763m in the 12 months to October, its half yearly report shows.
Aviva's group personal pension sales have risen by 15% over the last year through a more targeted approach for larger schemes.
Increased retirement flexibility, changes to tax rules and falling numbers of individuals staying with one employer are making it difficult to track pensions, Towers Watson have said.
Almost a third of British workers do not plan to give up work when they reach retirement age, a survey reveals.
Legal and General's workplace pension sales have risen 189% this year due to the introduction of auto-enrolment for major retailers.
Prudential is working with both the National Employment Savings Trust and NOW Pensions for two-tier solutions, at the expense of competitor B&CE.
Fast food giant McDonalds will use the National Employment Savings Trust for 35,000 hourly-paid workers as part of a two-tier auto-enrolment solution.
Standard life has seen net inflows to its corporate pensions business fall by a third this year as businesses delayed decisions ahead of auto-enrolment.