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T. Rowe Price Investment Management, Inc.: ALNY position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of T. Rowe Price Investment Management, Inc. on ALNY, newest first. How the timeline and the estimate are built.

T. Rowe Price Investment Management, Inc. held 5,642,173 ALNY shares at 2026-06-30 per its 13F-HR filed 2026-08-14.

the latest 13F is the newest step

  1. period ended2026-06-30
    13F 5,642,173 shares
    Change vs previous 13F +448,849 shares

    1.11% of the 13F portfolio, value $1,698,464,000.

    13F-HR 0001897612-26-000578 filed by T. Rowe Price Investment Management, Inc.
    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 5,193,324 shares
    Change vs previous 13F +3,439,684 shares

    1.18% of the 13F portfolio, value $1,718,316,000.

    13F-HR 0001897612-26-000460 filed by T. Rowe Price Investment Management, Inc.
    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/A 1,753,640 shares
    Change vs previous 13F -420,344 shares

    0.44% of the 13F portfolio, value $697,335,000.

    13F-HR/A 0001897612-26-000299 filed by T. Rowe Price Investment Management, Inc.
    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 2,173,984 shares
    Change vs previous 13F -2,107,295 shares

    0.61% of the 13F portfolio, value $991,337,000.

    13F-HR 0001897612-25-000511 filed by T. Rowe Price Investment Management, Inc.
    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 4,281,279 shares
    Change vs previous 13F -136,866 shares

    0.88% of the 13F portfolio, value $1,396,083,000.

    13F-HR 0000080255-25-000548 filed by T. Rowe Price Investment Management, Inc.
    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 4,418,145 shares
    Change vs previous 13F +33,696 shares

    0.79% of the 13F portfolio, value $1,192,988,000.

    13F-HR 0000080255-25-000283 filed by T. Rowe Price Investment Management, Inc.
    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 4,384,449 shares
    Change vs previous 13F +1,245,195 shares

    0.64% of the 13F portfolio, value $1,031,705,000.

    13F-HR 0000080255-25-000217 filed by T. Rowe Price Investment Management, Inc.
    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 3,139,254 shares
    Change vs previous 13F not available

    0.52% of the 13F portfolio, value $863,390,000.

    13F-HR 0001897612-24-002015 filed by T. Rowe Price Investment Management, Inc.
    Filed (acceptance time not in the bulk data set), ingested

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