ACK Asset Management LLC: LFUS position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of ACK Asset Management LLC on LFUS, newest first. How the timeline and the estimate are built.

ACK Asset Management LLC held 125,000 LFUS shares at 2026-06-30 per its 13F-HR filed 2026-08-13.

the latest 13F is the newest step

period ended2026-06-30
13F 125,000 shares
Change vs previous 13F -10,000 shares
6.65% of the 13F portfolio, value $56,916,250.
13F-HR 0001510940-26-000005 filed by ACK Asset Management LLC
Filed 2026-08-13 (acceptance time not in the bulk data set), ingested 2026-10-06 09:57:27 UTC
Acceptance time not in the bulk data set (spec §4.2).
period ended2026-03-31
13F 135,000 shares
Change vs previous 13F not available
5.72% of the 13F portfolio, value $45,812,250.
13F-HR 0001510940-26-000004 filed by ACK Asset Management LLC
Filed 2026-05-15 (acceptance time not in the bulk data set), ingested 2026-10-06 09:58:43 UTC
Acceptance time not in the bulk data set (spec §4.2).