| Company | Symbol | Close | Close | Close | %YTD |
| 12/31/96* | 3/31/97 | 6/30/97 | |||
| Sparta Pharm | SPTA | 1.468 | 0.718 | 0.625 | -57 |
| Sugen | SUGN | 12.875 | 10.500 | 12.875 | 0 |
| SunPharm | SUNP | 5.000 | 3.750 | 3.687 | -26 |
| SuperGen | SUPG | 12.250 | 11.125 | 14.750 | 20 |
| Synaptic Pharma | SNAP | 12.000 | 14.000 | 13.125 | 9 |
| Synbiotics | SBIO | 3.187 | 3.875 | 4.125 | 29 |
| Synsorb Biotech | SYB* | 11.600 | 9.000 | 8.800 | -24 |
| T Cell Sci | TCEL | 1.625 | 1.562 | 1.875 | 15 |
| Targeted Genet | TGEN | 4.500 | 3.500 | 2.750 | -39 |
| Techniclone Int'l | TCLN | 4.500 | 4.937 | 4.375 | -3 |
| Teva Pharm | TEVIY | 50.250 | 55.500 | 64.750 | 29 |
| Texas Biotech | TXB | 4.375 | 4.500 | 4.875 | 11 |
| Therapeut Disc | TDCA | 11.125 | 11.000 | 11.125 | 0 |
| Theratech | THRT | 13.250 | 10.750 | 11.750 | -11 |
| Titan Pharma | TTNPU | 12.875 | 4.125 | 3.562 | -72 |
| Transkaryotic | TKTX | 18.500 | 19.500 | 30.875 | 67 |
| Trega Biosciences (10) | TRGA | 5.250 | 5.750 | 6.125 | 17 |
| Triangle Pharma | VIRS | 22.875 | 15.750 | 24.875 | 9 |
| Trinity Bio | TRIBY | 2.343 | 2.500 | 2.562 | 9 |
| Tripos | TRPS | 11.750 | 15.250 | 15.625 | 33 |
| Unigene | UGNE | 2.031 | 3.375 | 4.750 | 134 |
| UroCor | UCOR | 9.562 | 9.250 | 9.375 | -2 |
| US Bioscience | UBS | 12.625 | 11.625 | 9.625 | -24 |
| Vertex Pharm | VRTX | 40.250 | 40.250 | 38.250 | -5 |
| Vical | VICL | 16.500 | 14.500 | 12.750 | -23 |
| VimRx | VMRX | 3.375 | 2.875 | 3.218 | -5 |
| Vion Pharma | VION | 3.062 | 4.250 | 4.562 | 49 |
| Viragen | VRGN | 5.218 | 2.500 | 2.531 | -51 |
| ViroPharma | VPHM | 8.750 | 13.000 | 17.875 | 104 |
| Virus Research | VRII | 5.750 | 8.250 | 6.750 | 17 |
| Visible Genetics | VGINF | 8.750 | 3.750 | 6.000 | -31 |
| Vyrex | VYRX | 12.750 | 6.000 | 6.078 | -52 |
| Xenova Group | XNVAY | 3.250 | 5.687 | 5.250 | 62 |
| XOMA | XOMA | 5.125 | 5.500 | 4.812 | -6 |
| Xytronyx | XYX | 1.250 | 1.187 | 1.437 | 15 |
| Zonagen | ZONA | 9.375 | 16.125 | 21.875 | 133 |
| NOTES: |
| 1. Allergan Ligand Retinoid Therapeutics Inc.'s units (NASDAQ:ALRIZ), which consisted of 1 share and 2 warrants, separated and began trading separately on 6/3/97. The common stock trades on NASDAQ under the symbol ALRI; the share price on the first trading day, 6/4/97, was $19. |
| 2. AntiVirals Inc. (NASDAQ:AVII) completed its IPO 6/3/97. The stock was priced at $9 per unit. |
| 3. Aurora Biosciences Corp. (NASDAQ:ABSC) completed its IPO 6/19/97. The stock was priced at $10 per share. |
| 4. BioChem Pharma Inc. (NASDAQ:BCHXF) split its stock 2 for 1, effective 4/7/97. The historical prices have been adjusted accordingly. |
| 5. Boston Life Sciences Inc. reverse-split its stock 1 for 10, effective 6/10/97. The stock will trade on NASDAQ under the symbol BLSID for about 30 days before reverting to BLSI. The historical prices have been adjusted accordingly. |
| 6. Cel-Sci Corp.'s stock, which had been trading on the NASDAQ SmallCap Market under the symbol CELI, began trading instead on the American Stock Exchange under the symbol HIV, effective 6/5/97. |
| 7. DeKalb Genetics Corp., whose Class B common stock had been trading on NASDAQ under the symbol SEEDB, began trading instead on the New York Stock Exchange under the symbol DKB, effective 6/16/97. |
| 8. Endorex Corp. (OTC:ENDU) reverse-split its stock 1 for 15, effective 6/11/97. The new trading symbol is ENDR. The historical prices have been adjusted accordingly. |
| 9. Genta Inc. reverse-split its stock 1 for 10, effective 4/7/97. The historical prices have been adjusted accordingly. |
| 10. Houghten Pharmaceuticals Inc. (NASDAQ:HPIP) changed its company name to Trega Biosciences Inc. and the trading symbol to TRGA, effective 5/1/97. |
| * The prices listed in the 12/31/96 column represent the 1996 closing prices or, for those stocks that started trading in 1997, the IPO prices. |