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) PepsiCo, Inc.

9) Republic National Distributing Company

10) Texas Association of Obstetricians & Gynecologists

11) Texas Wildlife Association

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

13) TXU Energy Retail Company LLC

14) Union Pacific Railroad

15) Vistra Corp.

16) Vistra Corporate Services Company