Biogen, Inc. is a security (CUSIP 09062XAN3) tracked across SEC portfolio filings. 2 registered fund positions totaling $10.3M via N-PORT as of 2026-04-30.
| Fund | Registrant | Value | % of fund |
|---|---|---|---|
| MFS Limited Maturity Fund | MFS Series Trust IX | $9.7M | 29.16% |
| BlackRock Total Return Fund | BlackRock Bond Fund, Inc. | $565K | 0.32% |