Stehman-Breen Catherine
SEC insider (Form 3/4/5 filer). CIK 0001702233. Director at Dyne Therapeutics, Inc. (DYN) and 2 other issuers. 13 reported Form 4/5 transactions since Sep 2024; latest on Jun 5, 2026. Located in WALTHAM, MA.
Companies Stehman-Breen Catherine has filed insider reports for
- Dyne Therapeutics, Inc. (DYN): Director
- Tenaya Therapeutics, Inc. (TNYA): Director
- Generation Bio Co. (GBIO): Director
Stehman-Breen Catherine
CIK: 0001702233
Transaction Breakdown
High conviction signal
Position reduction
Derivative conversions
Compensation grants
Gifts, tax withholding, conversions, dispositions to the issuer and other codes
Discretionary Trading P&L
Holdings
Transaction History (13 total)
- Jun 5, 2026DYN
Dyne Therapeutics, Inc.
AwardDirectStock option (right to buy)
35.2K shares- - May 28, 2026TNYA
Tenaya Therapeutics, Inc.
AwardDirectStock Option (Right to buy)
120K shares- - Feb 9, 2026GBIO
Generation Bio Co.
Tender OfferDirect4.8K shares- - Feb 9, 2026GBIO
Generation Bio Co.
DispositionDirectStock Option (right to buy)
1.5K shares- - Feb 9, 2026GBIO
Generation Bio Co.
DispositionDirectStock Option (right to buy)
1.9K shares- - Feb 9, 2026GBIO
Generation Bio Co.
DispositionDirectStock Option (right to buy)
2.5K shares- - Feb 9, 2026GBIO
Generation Bio Co.
DispositionDirectStock Option (right to buy)
6K shares- - Feb 9, 2026GBIO
Generation Bio Co.
DispositionDirectStock Option (right to buy)
3K shares- - Feb 9, 2026GBIO
Generation Bio Co.
DispositionDirectStock Option (right to buy)
5.2K shares- - Jun 4, 2025GBIO
Generation Bio Co.
AwardDirectStock Option (right to buy)
30K shares-
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| Jun 5, 2026 |  DYN Dyne Therapeutics, Inc. | Award Stock option (right to buy) | 35,152 | - | - | Direct |
| May 28, 2026 |  TNYA Tenaya Therapeutics, Inc. | Award Stock Option (Right to buy) | 120,000 | - | - | Direct |
| Feb 9, 2026 |  GBIO Generation Bio Co. | Tender Offer | 4,752 | - | $0 | Direct |
| Feb 9, 2026 | GBIO Generation Bio Co. | Disposition Stock Option (right to buy) | 1,500 | - | - | Direct |
| Feb 9, 2026 | GBIO Generation Bio Co. | Disposition Stock Option (right to buy) | 1,920 | - | - | Direct |
| Feb 9, 2026 | GBIO Generation Bio Co. | Disposition Stock Option (right to buy) | 2,500 | - | - | Direct |
| Feb 9, 2026 | GBIO Generation Bio Co. | Disposition Stock Option (right to buy) | 6,000 | - | - | Direct |
| Feb 9, 2026 | GBIO Generation Bio Co. | Disposition Stock Option (right to buy) | 3,000 | - | - | Direct |
| Feb 9, 2026 | GBIO Generation Bio Co. | Disposition Stock Option (right to buy) | 5,200 | - | - | Direct |
| Jun 4, 2025 | GBIO Generation Bio Co. | Award Stock Option (right to buy) | 30,000 | - | - | Direct |
1-10 of 13 transactions