Mosbrooker Eric
SEC insider (Form 3/4/5 filer). CIK 0001715283. Chief Commercial Officer at Avidity Biosciences, Inc. (RNAM). 12 reported Form 4/5 transactions since Sep 2024; latest on Feb 27, 2026. Located in SAN DIEGO, CA.
Companies Mosbrooker Eric has filed insider reports for
- Avidity Biosciences, Inc. (RNAM): Officer, Chief Commercial Officer
Mosbrooker Eric
CIK: 0001715283
Transaction Breakdown
High conviction signal
Position reduction
Derivative conversions
Compensation grants
Gifts, tax withholding, conversions, dispositions to the issuer and other codes
Companies & Roles (1)
Avidity Biosciences, Inc.
Discretionary Trading P&L
Holdings
Transaction History (12 total)
- Feb 27, 2026RNAM
Avidity Biosciences, Inc.
DispositionDirect79.4K shares- - Dec 17, 2025RNA
Avidity Biosciences, Inc.
Tax PaymentDirect11.4K shares at avg. $71.87$821K - Dec 17, 2025RNA
Avidity Biosciences, Inc.
AwardDirect72K shares- - Dec 17, 2025RNA
Avidity Biosciences, Inc.
Tax PaymentDirect36.6K shares at avg. $71.87$2.6M - Oct 3, 2025RNA
Avidity Biosciences, Inc.
ExerciseDirect6.6K shares at avg. $9.05$59K - Oct 3, 2025RNA
Avidity Biosciences, Inc.
SaleDirect6.6K shares at avg. $45.38$298K - Sep 3, 2025RNA
Avidity Biosciences, Inc.
ExerciseDirect6.6K shares at avg. $9.05$59K - Sep 3, 2025RNA
Avidity Biosciences, Inc.
SaleDirect6.6K shares at avg. $47.07$309K - Aug 6, 2025RNA
Avidity Biosciences, Inc.
ExerciseDirect124.7K shares at avg. $9.05$1.1M - Aug 6, 2025RNA
Avidity Biosciences, Inc.
SaleDirect124.7K shares at avg. $44.06$5.5M
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| Feb 27, 2026 | RNAM Avidity Biosciences, Inc. | Disposition | 79,413 | - | $0 | Direct |
| Dec 17, 2025 |  RNA Avidity Biosciences, Inc. | Tax Payment | 11,426 | $71.87 | $821,187 | Direct |
| Dec 17, 2025 | RNA Avidity Biosciences, Inc. | Award | 72,000 | - | - | Direct |
| Dec 17, 2025 | RNA Avidity Biosciences, Inc. | Tax Payment | 36,564 | $71.87 | $2,627,855 | Direct |
| Oct 3, 2025 | RNA Avidity Biosciences, Inc. | Exercise | 6,562 | $9.05 | $59,386 | Direct |
| Oct 3, 2025 | RNA Avidity Biosciences, Inc. | Sale | 6,562 | $45.38 | $297,771 | Direct |
| Sep 3, 2025 | RNA Avidity Biosciences, Inc. | Exercise | 6,563 | $9.05 | $59,395 | Direct |
| Sep 3, 2025 | RNA Avidity Biosciences, Inc. | Sale | 6,563 | $47.07 | $308,936 | Direct |
| Aug 6, 2025 | RNA Avidity Biosciences, Inc. | Exercise | 124,687 | $9.05 | $1,128,417 | Direct |
| Aug 6, 2025 | RNA Avidity Biosciences, Inc. | Sale | 124,687 | $44.06 | $5,494,033 | Direct |
1-10 of 12 transactions