Biogen ($BIIB) Insider Trading & Smart Money Activity
Biogen Inc. ($BIIB) has 7 congress trades, 27 13F position changes and 5 analyst ratings on file.
- Insider buyers (12 mo)
- 0
- Insider sellers (12 mo)
- 0
- Net insider $ (12 mo)
- $0
- Congress trades (12 mo)
- 7
- 13F moves on file
- 27
- Analyst ratings on file
- 5
BIIB insider buying and selling by quarter
| Quarter | Insider buys | Insider sales | Congress buys / sales | 13F added / cut |
|---|---|---|---|---|
| Q1 2026 | 0 | 0 | 1 / 0 | 0 / 0 |
| Q2 2026 | 0 | 0 | 3 / 1 | 19 / 8 |
| Q3 2026 | 0 | 0 | 0 / 2 | 0 / 0 |
| Q4 2026 | 0 | 0 | 0 / 0 | 0 / 0 |
Insider buys and sales count open-market trades only (Form 4 codes P and S). Grants, option exercises and tax withholding are left out.
All BIIB insider, congress, 13F and analyst activity
| Date | Source | Who | Action | Shares | Value / amount | ΔOwn | 1W | 1M | 6M | Filing | Story |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Analyst | JP Morgan | Raises to Overweight | PT $300 | Read | |||||||
| Analyst | UBS | Reiterates to Buy | PT $270 | +3.1% | Read | ||||||
| Analyst | RBC Capital | Reiterates to Outperform | PT $256 | +7.7% | — | ||||||
| Congress | Maria Elvira Salazar | Sale | $1,001 - $15,000 | -1.6% | Read | ||||||
| Congress | Kevin Hern | Sale | $1,001 - $15,000 | +3.9% | +3.1% | — | |||||
| Analyst | Needham | Reiterates to buy | PT $256 | -3.8% | -3.4% | Read | |||||
| Analyst | Mizuho | Reiterates to buy | PT $221 | +0.5% | -0.7% | Read | |||||
| Congress | Gilbert Ray Cisneros Jr. | Purchase | $1,001 - $15,000 | +2.4% | +6.7% | Read | |||||
| Congress | Maria Elvira Salazar | Sale | $15,001 - $50,000 | +5.4% | +14.5% | — | |||||
| 13F | Zurcher Kantonalbank (Zurich Cantonalbank) | Added | +69.71K sh | $113.11M | +0.4% | +2.9% | — | ||||
| 13F | Zurcher Kantonalbank (Zurich Cantonalbank) | Added | +69.71K sh | $104.41M | +0.4% | +2.9% | — | ||||
| 13F | Van Eck Associates | Added | +14.24K sh | $233.93M | +0.4% | +2.9% | Read | ||||
| 13F | Man Group | Reduced | -20.54K sh | $69.05M | +0.4% | +2.9% | Read | ||||
| 13F | Lmr Partners | Added | +107.50K sh | $25.16M | +0.4% | +2.9% | — | ||||
| 13F | Lmr Partners | Added | +107.50K sh | $23.22M | +0.4% | +2.9% | — | ||||
| 13F | Gotham Asset Management | Added | +21.63K sh | $64.65M | +0.4% | +2.9% | — | ||||
| 13F | Gotham Asset Management | Added | +21.63K sh | $59.68M | +0.4% | +2.9% | — | ||||
| 13F | Fred Alger Management | Reduced | -65.58K sh | $158.83M | +0.4% | +2.9% | — | ||||
| 13F | Cresset Asset Management | Reduced | -8.88K sh | $14.62M | +0.4% | +2.9% | — | ||||
| 13F | Balyasny Asset Management L.P. | Added | +42.09K sh | $140.82M | +0.4% | +2.9% | — | ||||
| 13F | Balyasny Asset Management L.P. | Added | +42.09K sh | $129.98M | +0.4% | +2.9% | — | ||||
| 13F | AQR Capital Management | Added | +394.94K sh | $416.70M | +0.4% | +2.9% | — | ||||
| 13F | AQR Capital Management | Added | +394.94K sh | $384.63M | +0.4% | +2.9% | — | ||||
| 13F | Peak6 | New | +28.17K sh | $6.10M | -1.0% | +3.8% | — | ||||
| 13F | Peak6 | New | +28.17K sh | $5.63M | -1.0% | +3.8% | — | ||||
| 13F | Exoduspoint Capital Management | New | +151.99K sh | $32.93M | -1.0% | +3.8% | — | ||||
| 13F | Hudson Bay Capital Management | Reduced | -20.49K sh | $43.62M | -8.2% | -2.2% | — | ||||
| Congress | Maria Elvira | Purchase | $1,001 - $15,000 | -4.4% | +0.3% | Read | |||||
| 13F | Creative Planning | Added | +27.23K sh | $25.40M | -4.4% | +0.3% | — | ||||
| 13F | Creative Planning | Added | +27.23K sh | $23.44M | -4.4% | +0.3% | — | ||||
| Congress | Maria Elvira | Purchase | $50,001 - $100,000 | -3.1% | -1.9% | Read | |||||
| 13F | Legal & General Group | Reduced | -109.77K sh | $292.41M | -0.3% | -0.4% | — | ||||
| 13F | Legal & General Group | Reduced | -109.77K sh | $269.91M | -0.3% | -0.4% | — | ||||
| 13F | Candriam S.C.A. | Added | +51.30K sh | $82.70M | +1.1% | +1.6% | — | ||||
| 13F | Pictet Asset Management Holding | Reduced | -34.17K sh | $197.85M | +2.3% | +1.9% | — | ||||
| 13F | Pictet Asset Management Holding | Reduced | -34.17K sh | $182.63M | +2.3% | +1.9% | — | ||||
| Congress | Alan Armstrong | Purchase | $1,001 - $15,000 | -6.3% | -1.7% | +23.8% | — |
Showing 37 of 39 filings (the latest 13F moves are capped at 25; see the institutions below).
1W / 1M / 6M = how BIIB moved from the trade or filing date.
Members of Congress trading BIIB
Institutions moving BIIB (13F)
Analyst ratings on BIIB
Frequently asked questions
Which members of Congress traded BIIB?
7 disclosed trades by Maria Elvira Salazar, Maria Elvira, Kevin Hern, Gilbert Ray Cisneros Jr. and Alan Armstrong. The latest was on Sep 24, 2026.
Which institutions changed their BIIB positions?
Recent 13F filers moving the stock include Zurcher Kantonalbank (Zurich Cantonalbank), Lmr Partners, Gotham Asset Management, Balyasny Asset Management L.P. and AQR Capital Management.
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Data comes from public SEC Form 4 and 13F filings and STOCK Act disclosures. Dates are the trade or filing date reported. This page is for research only and is not investment advice.
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