Insiders / Fust Matthew K
Fust Matthew K
CIK 1397266personinsider
Companies
4
First seen
May 18, 2026
Last activity
Jun 22, 2026
Companies
| Company | Shares held | Latest |
|---|---|---|
| Ultragenyx Pharmaceutical Inc. · RARE | 33,696 | — |
| Atara Biotherapeutics, Inc. · ATRA | 30,188 | — |
| Crinetics Pharmaceuticals, Inc. · CRNX | 28,761 | — |
| Neumora Therapeutics, Inc. · NMRA | — | — |
All securities held
6 positions · latest reported per filing
| Company | Security | Shares |
|---|---|---|
| Atara Biotherapeutics, Inc. | Common Stock | 30,188 |
| Crinetics Pharmaceuticals, Inc. | Common Stock | 28,761 |
| Crinetics Pharmaceuticals, Inc. | Stock Option (Right to Buy)Derivative | 9,730 |
| Neumora Therapeutics, Inc. | Stock Option (Right to Buy)Derivative | 80,000 |
| Ultragenyx Pharmaceutical Inc. | Common Stock | 33,696 |
| Ultragenyx Pharmaceutical Inc. | Stock Option (Right to Buy)Derivative | 14,058 |
Activity
InsidersInstitutions
This person's insider trades (Form 4), across every company.| Date | Action | Company | Value | Shares Δ | Position after | Impact |
|---|---|---|---|---|---|---|
| Jun 18, 2026 | Grant | CRNX Crinetics Pharmaceuticals, Inc. Common Stock | $0 | +6K +25.95% | 28,761 0.03% of shares | low |
| Jun 9, 2026 | Grant | ATRA Atara Biotherapeutics, Inc. Common Stock | $0 | +12K +65.98% | 30,188 0.30% of shares | low |
| May 14, 2026 | Grant | RARE Ultragenyx Pharmaceutical Inc. Common Stock | $0 | +8K +29.87% | 33,696 0.03% of shares | low |
| Jun 18, 2026 | Grant | CRNX Crinetics Pharmaceuticals, Inc. Stock Option (Right to Buy) | — | +10K | 9,730 <0.01% of shares | low |
| May 27, 2026 | Grant | NMRA Neumora Therapeutics, Inc. Stock Option (Right to Buy) | — | +80K | 80,000 0.04% of shares | low |
| May 14, 2026 | Grant | RARE Ultragenyx Pharmaceutical Inc. Stock Option (Right to Buy) | — | +14K | 14,058 0.01% of shares | low |