| Start Date | 2011-00-00 |
| Notes | Plato Learning, once a public company, was acquired in May 2010 for $144 million by private-equity firm Thoma Bravo. Backed by its new owner, Plato last year acquired competitor Archipelago Learning of Dallas for $291 million in cash. Archipelago, founded in 2000 and larger than Plato, is a subscription-based provider of education software in the United States, Canada and the United Kingdom. |