Limited Partner Information

ISTC Corporation is based in Denver, Colorado and can be contacted using the information below. When contacting Investor Relations please include the investor name, investor number, the last four digits of the investor’s social security/tax ID and the partnership for which you are inquiring.

AIR Communities

  • Attn: ISTC Corporation
  • 4582 S. Ulster Street
  • Suite 1700
  • Denver, CO 80237
  • (303) 757-8101
  • (888) 789-8600

Limited Partner Contact

Transfer Agent

Investor Portal

You can access your account including digital copies of your Schedule K-1, distribution history, current investment summary and all online forms. You must have an email address on file with us to access your account. Please contact ISTC Corporation to update your account at

If you already have an email address on file, you may log in by selecting the Investor Portal button below. If this is the first time logging in and you no longer have the temporary password, please email ISTC Corporation for a new one. Once logged in for the first time, you will need to select a security question and then establish a new password.


Did not receive an email with a temporary password?

Please email ISTC Corporation at to verify we have an email address on file for you and to receive a temporary password.

Forgot your password?

Once you have established your account, if you forget your password, you can select Forgot Password on the login screen.

Other questions regarding the Portal?

If you have any other questions regarding the Investor Portal, please contact ISTC Corporation at or (864) 239-1029.

Change of Address

Please send any request for changes of address in writing to Conduent Securities Services, Inc at the contact information listed above. You may also click here to download an Address Change Form or contact ISTC Corporation to request a form.

ACH/Direct Deposit is Available

We offer distributions via ACH transfer (electronic money transfer into your bank account). If you would like to enroll for direct deposit, we must receive a completed ACH Enrollment form with all investor’s signatures. You may click here to download an ACH Enrollment Form or contact ISTC Corporation to request a form.

Redemption of Common Units

Redemptions can be requested at any time. You may click here to download the redemption instructions and documents or contact ISTC Corporation to request a packet.

Transfer Ownership of Account

If you need to transfer ownership of your account, you can click here to download the instructions and forms or contact ISTC Corporation to request them.