Rice Sangalis Toole & Wilson

5847 San Felipe Suite 4350 Houston, Texas 77057 United States Phone: 713-783-7770 Fax: 713-783-9750 Team: Ernie Cutter, Partner Website: www.rstw.com Company Type: Venture Capital Firm

Red River Ventures

15301 Dallas Parkway Suite 820 Addison, Texas 75001 United States Phone: 972-687-7770 Fax: 972-687-7760 Team: Dwain Williams, Partner Website: www.redriverventures.com Company Type: Venture Capital Firm

The Capital Network Inc.

3925 W. Braker Lane Suite 406 Austin, Texas 78759-5321 United States Phone: 512-305-826 Fax: 512-305-836 Team: David H. Gerhardt, Partner Website: www.thecapitalnetwork.com Company Type: Venture Capital Firm

Natural Gas Partners

125 East John Carpenter Freeway Suite 600 Irving, Texas 75062 United States Phone: 972-432-1440 Fax: 972-432-1441 Team: David R. Albin, Partner Website: www.naturalgaspartners.com Company Type: Venture Capital Firm

EnCap Investments L.C.

1100 Louisiana Avenue Suite 3150 Houston, Texas 77002 United States Phone: 713-659-6100 Fax: 713-599-200 Team: David B. Miller, Partner Website: www.encapinvestments.com Company Type: Venture Capital Firm

Cirrus Logic, Inc.

4210 South Industrial Drive Austin, Texas 78744 United States Phone: 512-445-7222 Fax: 512-445-7581 Team: David D. French, Partner Website: www.cirrus.com Company Type: Venture Capital Firm

AM Fund

2700 Earl Rudder Freeway South Crystal Park Plaza College Station, Texas 77845 United States Phone: 979-694-6604 Fax: 979-694-6563 Team: David Mueller, Partner Website: www.amfund.com Company Type: Venture Capital Firm

Vortex Partners, L.P.

2626 Cole Avenue Suite 710 Dallas, Texas 75204 United States Phone: 214-849-9817 Fax: 214-849-9850 Team: Darren Blanton, Partner Website: www.vortexpartners.com Company Type: Venture Capital Firm

Hunt Private Equity Group Inc.

1445 Ross at Field Suite 2100 Dallas, Texas 75202 United States Phone: 214-978-8550 Fax: 214-855-6999 Team: Darren Edwards, Partner Website: www.huntpeg.com Company Type: Venture Capital Firm

Phillips-Smith-Machens Venture Partners

5080 Spectrum Drive West Suite 805 Addison, Texas 75001 United States Phone: 972-387-725 Fax: 972-458-2560 Team: Craig Foley, Partner Website: www.phillips-smith.com Company Type: Venture Capital Firm

Gulfstar Group Inc.

700 Louisiana St. Suite 3800 Houston, Texas 77019 United States Phone: 713-300-2020 Fax: 713-300-2021 Team: Clifford W. Atherton, Partner Website: www.gulfstargroup.com Company Type: Venture Capital Firm

Haddington Ventures LLC

2603 Augusta Suite 1130 Houston, Texas 77057 United States Phone: 713-532-7992 Fax: 713-532-9922 Team: Christine Acree, Partner Website: www.hvllc.com Company Type: Venture Capital Firm

Hunt Ventures, LP

816 Congress Avenue Suite 1550 Austin, Texas 78701 United States Phone: 512-482-714 Fax: 512-482-8308 Team: Chris Kleinert, Partner Website: www.huntventures.com Company Type: Venture Capital Firm

HO2 Partners

Two Galleria Tower, 13455 Noel Rd. Suite 1670 Dallas, Texas 75240 United States Phone: 972-702-1144 Fax: 972-702-8234 Team: Charles B. Humphreyson, Partner Website: www.ho2.com Company Type: Venture Capital Firm

Bahr International Inc.

P.O. Box 795 Gainesville, Texas 76241 United States Phone: 940-665-2344 Team: Charles C. Bahr, Partner Website: www.bahrintl.com Company Type: Venture Capital Firm

McFarland, Grossman & Co.

9821 Katy Freeway Suite 500 Houston, Texas 77024 United States Phone: 713-464-7770 Fax: 713-464-1827 Team: Cary Grossman, Partner Website: www.mcfarlandgrossman.com Company Type: Venture Capital Firm