A performer must fulfill the following Category A - Required Reporting requirements for each demonstration year (DY).(1) Core activities. A performer must select at least one core activity in the RHP plan update for its RHP that supports the achievement of its Category C measure goals, as described in the Measure Bundle Protocol. The performer must report progress on, and updates to, its selected core activities during the second reporting period of each DY.(2) Alternative Payment Models (APMs). A performer must report progress toward, or implementation of, APM arrangements with Medicaid managed care organizations or other payers during the second reporting period of each DY.(3) Costs and savings. A performer with a total valuation greater than or equal to $1 million per DY must report the costs of at least one core activity of its choice, as well as the forecasted or generated savings from that core activity.(A) The performer must report the costs and savings associated with its selected core activity at the level of the performer's system, to the extent possible.(B) The performer must submit a progress update on the costs and savings associated with its selected core activity during the second reporting period of DY7.(C) The performer must submit a final report on the costs and savings associated with its selected core activity during the second reporting period of DY8.(4) Collaborative activities. A performer must attend at least one learning collaborative, stakeholder forum, or other stakeholder meeting during each DY and report on its participation during the second reporting period of each DY.