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) CenterPoint Energy, Inc.

4) Experian

5) HCA Healthcare

6) IGT Global Solutions Corporation

7) Luminant Generation Company LLC

8) PepsiCo, Inc.

9) Raise Your Hand for Public Schools DBA Raise Your Hand Texas

10) Republic National Distributing Company

11) Texas Association of Obstetricians & Gynecologists

12) Texas Wildlife Association

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

14) TXU Energy Retail Company LLC

15) Union Pacific Railroad

16) Vistra Corp.

17) Vistra Corporate Services Company