I hope this helps. This is directly from the savingsbond website.

Purchase Limitation. You can purchase no more than $30,000 (face amount) in bonds in your name during any calendar year. Because we sell Series EE bonds for one-half their face value, this means you can spend no more than $15,000 on Series EE bonds registered in your name during any calendar year. The limit applies separately for bonds that you purchase in an individual capacity and for those you purchase in a fiduciary capacity. If you purchase bonds in coownership form, you can apply the purchase toward your limitation amount or that of that other coowner, or divide it between the two of you. The limitation doesnĄ¯t apply to bonds on which you name yourself as a beneficiary, as opposed to those on which you name yourself as an owner or coowner.