Who owns SION
122 institutions reported holding SION for 2026Q1, together 101% of the company, more than the 100 a quarter earlier.
122
Institutions reporting a position · as of 2026Q1 · up from 100 the quarter before
- Shares held by institutions
- 45.4M
Shares held by institutions · 101% of the company · long US equity positions only, as reported on Form 13F
- Reported value
- $1.82B
Reported value · at 2026-03-31 prices, not today's
- Top 5 holders
- 58%
Top 5 holders · of the whole company, between five filers
Details›
- Reporting quarter2026-03-31
- 2026Q1
- Quarters on record
- 5
- New positions
- 28
- Positions exited
- 10
- Added to
- 39
- Reduced
- 29
- Top 10 holdersof the company
- 76%
| Quarter | Filers | Shares | Reported value |
|---|---|---|---|
| 2026Q1 | 122 | 45.4M | $1.82B |
| 2025Q4 | 100 | 43.9M | $1.81B |
| 2025Q3 | 78 | 42.8M | $1.26B |
| 2025Q2 | 65 | 43.4M | $754M |
| 2025Q1 | 47 | 41.5M | $434M |
| Holder | Shares | % of company | Value |
|---|---|---|---|
| RA CAPITAL MANAGEMENT, L.P. | 9.9M | 22% | $397M |
| TPG GP A, LLC | 6.5M | 14% | $260M |
| ORBIMED ADVISORS LLC | 3.5M | 7.9% | $142M |
| VIKING GLOBAL INVESTORS LP | 3.2M | 7.1% | $128M |
| Atlas Venture Life Science Advisors, LLC | 3.0M | 6.7% | $120M |
| ENAVATE SCIENCES GP, LLC | 2.5M | 5.5% | $99M |
| JPMORGAN CHASE & CO | 1.5M | 3.3% | $54M |
| JENNISON ASSOCIATES LLC | 1.5M | 3.2% | $58M |
| BlackRock Inc. | 1.3M | 2.9% | $52M |
| VANGUARD GROUP INC | 1.3M | 2.9% | $52M |
SEC Form 13F data sets (DERA bulk files). 13F is quarterly, filed up to 45 days late, and covers long US equity positions only, no shorts, no derivatives, nothing held below the reporting threshold.
reading the register…