Nicacio Leonardo Viana (CIK 2064901) reported 3 SEC Form 4 insider transactions across 2 companies over the past 18 months (most recent 2026-08-17). Recent activity: Buy CRBP (58,333 shares), Buy TARA (26,000 shares), Buy TARA (50,000 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-08-17 | Corbus Pharmaceuticals Holdings, Inc. (CRBP) | Chief Medical Officer | Buy | 58,333 | $0 |
| 2026-01-21 | Protara Therapeutics, Inc. (TARA) | Chief Medical Officer | Buy | 26,000 | $0 |
| 2025-04-17 | Protara Therapeutics, Inc. (TARA) | Chief Medical Officer | Buy | 50,000 | $0 |
Source: SEC Form 4 filings · as of 2026-08-17