| 2025-11-18 | Leach Jacob Steven | Director | Sell | 62 | $2.71 | $168.02 | -100% | → |
| 2025-11-14 | Szot Matthew K | Director | Sell | 1 | $2.75 | $2.75 | -100% | → |
| 2021-08-18 | Leach Jacob Steven | - | Buy | 150,000 | $1.53 | $228,765.00 | +100.0% | → |
| 2019-10-21 | Mayer Loretta Powers | Chief Scientific Officer | Sell | 6,000 | $0.83 | $4,980.00 | -1.8% | → |
| 2019-10-02 | Dyer Cheryl Ann | Pres. & Chief Research Officer | Sell | 6,000 | $0.93 | $5,574.60 | -1.6% | → |
| 2019-08-15 | Dyer Cheryl Ann | Pres. & Chief Research Officer | Sell | 40,000 | $1.19 | $47,722.00 | -4.9% | → |
| 2019-08-15 | Mayer Loretta Powers | Chief Scientific Officer | Sell | 40,000 | $1.21 | $48,490.00 | -5.0% | → |
| 2019-07-16 | SIEGEL KENNETH S | CEO | Buy | 696,296 | $1.35 | $939,999.60 | +11,119% | → |
| 2018-08-13 | Williams Julia Ann | - | Buy | 11,000 | $1.15 | $12,650.00 | +7.4% | → |
| 2018-06-21 | Mayer Loretta Powers | CEO & Chief Scientific Officer | Sell | 6,000 | $2.13 | $12,780.00 | -1.5% | → |
| 2017-12-21 | Mayer Loretta Powers | CEO & Chief Scientific Officer | Sell | 6,000 | $0.67 | $4,026.00 | -1.5% | → |
| 2017-12-04 | Dyer Cheryl Ann | Pres. & Chief Research Officer | Sell | 6,000 | $0.82 | $4,920.60 | -1.5% | → |
| 2017-11-24 | Williams Julia Ann | - | Buy | 1,700 | $0.90 | $1,525.24 | +7.7% | → |
| 2017-11-21 | Mayer Loretta Powers | CEO & Chief Scientific Officer | Sell | 6,000 | $0.89 | $5,362.80 | -1.5% | → |
| 2017-11-02 | Dyer Cheryl Ann | Pres. & Chief Research Officer | Sell | 6,000 | $2.72 | $16,339.20 | -1.5% | → |
| 2017-10-20 | Mayer Loretta Powers | CEO & Chief Scientific Officer | Sell | 6,000 | $1.52 | $9,126.00 | -1.5% | → |
| 2017-10-03 | Dyer Cheryl Ann | Pres. & Chief Research Officer | Sale+OE | 6,000 | $1.97 | $11,808.00 | -1.3% | → |
| 2017-09-22 | Mayer Loretta Powers | CEO & Chief Scientific Officer | Sell | 6,000 | $1.79 | $10,740.00 | -1.5% | → |
| 2017-09-05 | Dyer Cheryl Ann | Pres. & Chief Research Officer | Sell | 6,000 | $2.31 | $13,834.20 | -1.4% | → |
| 2017-08-21 | Mayer Loretta Powers | CEO & Chief Scientific Officer | Sell | 6,000 | $2.37 | $14,220.60 | -1.5% | → |
| 2017-08-18 | Altman Andrew | Chief Operating Officer | Buy | 20,000 | $2.77 | $55,391.64 | +82.7% | → |
| 2017-08-17 | Williams Julia Ann | - | Buy | 9,100 | $2.80 | $25,475.00 | +37.9% | → |
| 2017-07-26 | WICKERSHAM GROVER T. | - | Buy | 10,000 | $3.04 | $30,442.00 | +4.2% | → |
| 2017-07-26 | Williams Julia Ann | - | Buy | 10,000 | $3.21 | $32,099.00 | +512.8% | → |
| 2017-07-25 | WICKERSHAM GROVER T. | - | Buy | 15,000 | $2.85 | $42,775.00 | +5.4% | → |
| 2017-07-17 | CHESTERMAN THOMAS C | CFO and Treasurer | Sell | 1,411 | $5.14 | $7,247.01 | -4.4% | → |
| 2017-06-12 | CHESTERMAN THOMAS C | CFO and Treasurer | Sell | 10,000 | $5.71 | $57,124.00 | -20.1% | → |
| 2017-01-27 | Williams Julia Ann | - | Buy | 1,950 | $7.94 | $15,483.00 | New | → |
| 2017-01-27 | WICKERSHAM GROVER T. | - | Buy | 1,600 | $7.45 | $11,912.96 | +0.7% | → |
| 2017-01-27 | RAMSEY ROBERT E JR | - | Buy | 7,000 | $7.46 | $52,188.50 | +35.0% | → |
| 2017-01-24 | WICKERSHAM GROVER T. | - | Buy | 1,000 | $7.42 | $7,415.30 | +2.0% | → |
| 2016-12-13 | WICKERSHAM GROVER T | - | Buy | 52,500 | $8.00 | $420,000.00 | +8.4% | → |