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Disclosery

K2 PRINCIPAL FUND, L.P.: ATII position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of K2 PRINCIPAL FUND, L.P. on ATII, newest first. How the timeline and the estimate are built.

K2 PRINCIPAL FUND, L.P. held 526,227 ATII 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 526,227 shares
    Change vs previous 13F +438,327 shares

    0.52% of the 13F portfolio, value $5,672,727.

    13F-HR 0001461790-26-000032 filed by K2 PRINCIPAL FUND, L.P.
    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 87,900 shares
    Change vs previous 13F 0 shares

    0.1% of the 13F portfolio, value $915,039.

    13F-HR 0001461790-26-000030 filed by K2 PRINCIPAL FUND, L.P.
    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 87,900 shares
    Change vs previous 13F -25,770 shares

    0.09% of the 13F portfolio, value $910,644.

    13F-HR 0001461790-26-000016 filed by K2 PRINCIPAL FUND, L.P.
    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 113,670 shares
    Change vs previous 13F -46,500 shares

    0.12% of the 13F portfolio, value $1,160,571.

    13F-HR 0001461790-25-000054 filed by K2 PRINCIPAL FUND, L.P.
    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 160,170 shares
    Change vs previous 13F not available

    0.3% of the 13F portfolio, value $1,638,539.

    13F-HR 0001461790-25-000044 filed by K2 PRINCIPAL FUND, L.P.
    Filed (acceptance time not in the bulk data set), ingested

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