The new corporate strategy is focused on making sure people have a sustainable income in retirement through a pension system that gives security and value for everyone.
The number of schemes in surplus fell by 6, down from 3,826 to 3,820.
The deal secures the benefits of all 39 members, including 17 pensioners and 22 deferred members.
About a fifth (19%) said they were unsure what their pension would be worth at retirement.
DWP said the reforms will help more people retire comfortably and ensure the pensions system works better for everyone.
The ABI noted the increase would boost a median earner’s pension pot by 50% by the time they retire.
The deal completed in May 2026 and covered 629 deferred and 51 pensioner members, finishing the buy-in of all scheme liabilities.
The move follows strong engagement since Mylo's launch less than a year ago, with members making more than 50,000 pension consolidation requests.
Scheme members can now see how part-time work or career breaks could affect their retirement income.
Jeni Flanagan said: “Decumulation is the area where most change is needed, with a focus on education and engagement.”
Master trusts made up 41% of large schemes, compared with 34% own-trust arrangements and 25% contract-based schemes.
The deal, completed in June 2026, secures the benefits of all 48 scheme members, including 14 deferred and 34 pensioner members.