I work for a large financial services organization that is exploring the possibility of entering the 529 plan market. I am trying to identify TPAs that are currently recording for such plans.

I am interested in the very same issue re: the 529 plan market. Did you get any responses?

To my knowledge, no TPAs are involved in 529 plans. The recordkeeping for the 529 marketplace is done by the vendor or vendors that are offering specific state plans. There is an individual relationship between the plan being offered and the individual who buys the plan. It is not like qualified plans, where if the employer sponsors the plan, an individual account is kept.

I'm not sure about the context here, but I do know that our ADP rep was touting their administration of a 529 plan here in Arizona. We weren't interested, so didn't ask for details, but you might want to give your local ADP office a jingle to find out what they're up to!