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Disclosery

Stockbridge Partners LLC: ALSN position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of Stockbridge Partners LLC on ALSN, newest first. How the timeline and the estimate are built.

Stockbridge Partners LLC held 1,499,984 ALSN 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 1,499,984 shares
    Change vs previous 13F +469,586 shares

    3.56% of the 13F portfolio, value $169,108,196.

    13F-HR 0000919574-26-005193 filed by Stockbridge Partners LLC
    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 1,030,398 shares
    Change vs previous 13F not available

    2.91% of the 13F portfolio, value $120,618,390.

    13F-HR 0000919574-26-003151 filed by Stockbridge Partners LLC
    Filed (acceptance time not in the bulk data set), ingested

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