Ownership history in GLG LLC · 16 quarters on record
This page tracks every 13F SEC filing in which GLG LLC reported a position in BIOGEN IDEC INC (BIIB). Data includes quarterly share count, position size as % of portfolio, estimated market value, and end-of-quarter stock price — sourced directly from SEC EDGAR 13F filings.
| Quarter | Action | Shares | Change | Chg % | % of Fund | Mkt Value | Price (EOQ) |
|---|---|---|---|---|---|---|---|
| 2017 Q4 | UNCHANGED | 36,128 | — | 0% | 0.83% | $11.5M | $318.57 |
| 2017 Q3 | ADDED | 36,128 | +7,107 | +24.5% | 0.73% | $11.3M | $313.12 |
| 2017 Q2 | ADDED | 29,021 | +7,283 | +33.5% | 0.48% | $7.9M | $271.36 |
| 2017 Q1 | ADDED | 21,738 | +9,951 | +84.4% | 0.33% | $5.9M | $273.42 |
| 2016 Q4 | REDUCED | 11,787 | -9,251 | -44.0% | 0.23% | $3.3M | $283.58 |
| 2016 Q3 | REDUCED | 21,038 | -19,799 | -48.5% | 0.47% | $6.6M | $313.03 |
| 2016 Q2 | ADDED | 40,837 | +29,642 | +264.8% | 0.74% | $9.9M | $241.82 |
| 2016 Q1 | REDUCED | 11,195 | -1,863 | -14.3% | 0.18% | $2.9M | $260.32 |
| 2015 Q4 | REDUCED | 13,058 | -6,903 | -34.6% | 0.24% | $4.0M | $306.35 |
| 2015 Q3 | REDUCED | 19,961 | -20,335 | -50.5% | 0.15% | $5.8M | $291.81 |
As of 2025 Q4 — sorted by position size