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Disclosery

ARIZONA STATE RETIREMENT SYSTEM: BIIB position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of ARIZONA STATE RETIREMENT SYSTEM on BIIB, newest first. How the timeline and the estimate are built.

ARIZONA STATE RETIREMENT SYSTEM held 42,077 BIIB shares at 2026-06-30 per its 13F-HR filed 2026-08-07.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 42,077 shares
    Change vs previous 13F +2,214 shares

    0.05% of the 13F portfolio, value $9,091,157.

    13F-HR 0000897069-26-001594 filed by ARIZONA STATE RETIREMENT SYSTEM
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  2. period ended2026-03-31
    13F 39,863 shares
    Change vs previous 13F -357 shares

    0.04% of the 13F portfolio, value $7,308,084.

    13F-HR 0000897069-26-000996 filed by ARIZONA STATE RETIREMENT SYSTEM
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  3. period ended2025-12-31
    13F 40,220 shares
    Change vs previous 13F -3,199 shares

    0.04% of the 13F portfolio, value $7,078,318.

    13F-HR 0000897069-26-000191 filed by ARIZONA STATE RETIREMENT SYSTEM
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  4. period ended2025-09-30
    13F 43,419 shares
    Change vs previous 13F +666 shares

    0.03% of the 13F portfolio, value $6,082,134.

    13F-HR 0000897069-25-001611 filed by ARIZONA STATE RETIREMENT SYSTEM
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  5. period ended2025-06-30
    13F 42,753 shares
    Change vs previous 13F +639 shares

    0.03% of the 13F portfolio, value $5,369,349.

    13F-HR 0000897069-25-001322 filed by ARIZONA STATE RETIREMENT SYSTEM
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  6. period ended2025-03-31
    13F 42,114 shares
    Change vs previous 13F +1,344 shares

    0.04% of the 13F portfolio, value $5,762,880.

    13F-HR 0000897069-25-000898 filed by ARIZONA STATE RETIREMENT SYSTEM
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  7. period ended2024-12-31
    13F 40,770 shares
    Change vs previous 13F -951 shares

    0.04% of the 13F portfolio, value $6,234,548.

    13F-HR 0000897069-25-000186 filed by ARIZONA STATE RETIREMENT SYSTEM
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  8. period ended2024-09-30
    13F 41,721 shares
    Change vs previous 13F not available

    0.05% of the 13F portfolio, value $8,087,199.

    13F-HR 0000897069-24-002139 filed by ARIZONA STATE RETIREMENT SYSTEM
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).