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Disclosery

Starboard Value LP: AQN position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of Starboard Value LP on AQN, newest first. How the timeline and the estimate are built.

Starboard Value LP held 57,189,420 AQN 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 57,189,420 shares
    Change vs previous 13F 0 shares

    7.41% of the 13F portfolio, value $335,130,001.

    13F-HR 0000921895-26-002172 filed by Starboard Value LP
    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 57,189,420 shares
    Change vs previous 13F -6,300,000 shares

    7.69% of the 13F portfolio, value $351,143,039.

    13F-HR 0000921895-26-001402 filed by Starboard Value LP
    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 63,489,420 shares
    Change vs previous 13F 0 shares

    7.4% of the 13F portfolio, value $390,459,933.

    13F-HR 0000921895-26-000450 filed by Starboard Value LP
    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 63,489,420 shares
    Change vs previous 13F 0 shares

    6.42% of the 13F portfolio, value $340,938,185.

    13F-HR 0000921895-25-003099 filed by Starboard Value LP
    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 63,489,420 shares
    Change vs previous 13F -2,943,580 shares

    6.31% of the 13F portfolio, value $363,794,377.

    13F-HR 0000921895-25-002289 filed by Starboard Value LP
    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 66,433,000 shares
    Change vs previous 13F +1,117,000 shares

    6.21% of the 13F portfolio, value $341,465,620.

    13F-HR 0000921895-25-001532 filed by Starboard Value LP
    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 65,316,000 shares
    Change vs previous 13F +3,175,000 shares

    5.26% of the 13F portfolio, value $290,656,200.

    13F-HR 0000921895-25-000464 filed by Starboard Value LP
    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 62,141,000 shares
    Change vs previous 13F not available

    7.2% of the 13F portfolio, value $338,668,450.

    13F-HR 0000921895-24-002729 filed by Starboard Value LP
    Filed (acceptance time not in the bulk data set), ingested

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