Exhibit 9.6 Security holders of MainStreet [See Attached] EXHIBIT 9.6 Class A Non-Voting Common Stock: Number of Shares Date of Issuance - ------------------------------- ---------------- ---------------- 1. Frank T. Corker 3,000 12/04/96 2. Laykoon Huang 160,000 12/04/96 3. Dennis R. Thomas* 20,000 12/04/96 4. Izhak Oliver 50,000 12/20/96 5. David Ellis 15,000 01/15/97 6. Richard G. Pettit 15,000 01/15/97 7. Practice Acquisition Consultants, Inc. 5,000 05/21/97 8. L. Lanier Allen* 8,000 04/24/97 *Includes Allen & Thomas whose shares are going to be redeemed prior to the Closing. Class B Common Stock: 1. A. Wayne Johnson 1,351,250 12/12/96 2. Robert G. Riddett, Jr. 646,250 12/12/96 3. Michael J. Dare 352,500 12/12/96 4. PENMAN Private Equity and 3,525,000 12/ /96 Mezzanine Fund, L.P. 5. PENMAN Private Equity and 423,458 7/11/97 Mezzanine Fund, L.P. 6. A. Wayne Johnson 161,994 7/11/97 5% Cumulative Redeemable Preferred: 1. A. Wayne Johnson 927 12/12/96 2. PENMAN Private Equity and 2,440 12/ /96 Mezzanine Fund, L.P. 3. PENMAN Private Equity and 750 4/07/97 Mezzanine Fund, L.P. 4. PENMAN Private Equity and 130 6/05/97 Mezzanine Fund, L.P. 5. PENMAN Private Equity and 20 6/05/97 Mezzanine Fund, L.P. 6. PENMAN Private Equity and 100 5/22/97 Mezzanine Fund, L.P. Exhibit 9.6 (Continued) 10% Cumulative Redeemable Preferred: PP-1 PENMAN Private Equity and 298 7/11/97 Mezzanine Fund, L.P. PP-2 A. Wayne Johnson 114 7/11/97