1) American College of Obstetricians and Gynecologists

2) BlueCross BlueShield of Texas, A Div. of Health Care Service Corp., a Mutual Legal Reserve Company

3) Brightstar Global Solutions Corporation

4) CenterPoint Energy, Inc.

5) Experian

6) HCA Healthcare

7) Luminant Generation Company LLC

8) Republic National Distributing Company

9) Texas Association of Obstetricians & Gynecologists

10) Texas Wildlife Association

11) The Real Estate Council of San Antonio, Inc.

12) TXU Energy Retail Company LLC

13) Vistra Corp.

14) Vistra Corporate Services Company