Are you familiar with Guidestar? (
www.guidestar.org/
)It's a national database of non-profit orgs (i.e. 501's).
Not all PTO's are 501(c)(3)'s. In fact, I would wager the majority operate "off radar". But you may be able to find several listed on their site.
From the main page, select "More Search Options" in the upper left corner. In the search screen, put "PTO" in the keyword field and choose your state. I think it got 41 hits when I tried it.
You can also go to the IRS website and search on charities (
www.irs.gov/charities/page/0,,id=15053,00.html
). Again, you'll only get the the 501's.
On either of these, you may want to try some broader key words. Like maybe just "parent". Remember, "PTO" is just one generic acronym. Some orgs use others.
If you REALLY want to research this, you can approach your state agency that handles sales tax. A lot of organizations either pay sales tax or request an exemption even when they aren't 501s (if the state permits it). You can request an open records search for any organizations with "PTO" in their name (you might have to spell out versions). There's probably no charge. If there is, they'll have to tell you in advance.
[ 07-23-2004, 11:29 PM: Message edited by: JHB ]