Insiders / Backstrom Jay T.
Backstrom Jay T.
CIK 1796398personinsider
Companies
5
First seen
Jan 6, 2021
Last activity
Jul 10, 2026
Companies
| Company | Shares held | Latest |
|---|---|---|
| Scholar Rock Holding Corp · SRRK | 352,671 | — |
| Acceleron Pharma Inc · XLRN | 20,781 | — |
| Agios Pharmaceuticals, Inc. · AGIO | 1,447 | — |
| Disc Medicine, Inc. · GMTX | — | — |
| LAVA Therapeutics N.V. · LVTX | — | — |
All securities held
11 positions · latest reported per filing
Shares
| Company | Security | Shares |
|---|---|---|
| Acceleron Pharma Inc | Common stock | 20,781 |
| Agios Pharmaceuticals, Inc. | Common stock | 1,447 |
| Scholar Rock Holding Corp | Common stock | 352,671 |
Awards
| Company | Security | Shares |
|---|---|---|
| Agios Pharmaceuticals, Inc. | Restricted units | 2,894 |
Derivatives
| Company | Security | Shares |
|---|---|---|
| Acceleron Pharma Inc | Options | 20,896 |
| Agios Pharmaceuticals, Inc. | Options | 14,950 |
| Disc Medicine, Inc. | Options | 7,000 |
| Scholar Rock Holding Corp | Options | 285,715 |
Other
| Company | Security | Shares |
|---|---|---|
| LAVA Therapeutics N.V. | Unclassified | 33,390 |
| Scholar Rock Holding Corp | Unclassified | 425,561 |
| Scholar Rock Holding Corp | Unclassified | 151,430 |
Ownership percentages elsewhere on the site count common and ordinary shares only, because that is what shares outstanding are measured in. Everything above is a real holding; not all of it is a share of the company.
Activity
InsidersInstitutions
This person's trades in company stock, across every company.| Date | Action | Company | Value | Shares Δ | Position after | Impact |
|---|---|---|---|---|---|---|
| Jan 16, 2025 | Sell Open-market sale | SRRK Scholar Rock Holding Corp Common Stock | $986.0K | -22K -6.33% | 330,363 0.27% of shares | medium |
| Feb 18, 2025 | Sell Open-market sale | SRRK Scholar Rock Holding Corp Common Stock | $676.6K | -18K -5.56% | 311,991 0.26% of shares | medium |
| Jan 4, 2021 | Other Withheld for taxes | XLRN Acceleron Pharma Inc Common Stock |