MAIRS & POWER INC: AMBA position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of MAIRS & POWER INC on AMBA, newest first. How the timeline and the estimate are built.

MAIRS & POWER INC held 126,353 AMBA shares at 2026-06-30 per its 13F-HR filed 2026-08-14.

the latest 13F is the newest step

period ended2026-06-30
13F 126,353 shares
Change vs previous 13F +8,772 shares
0.1% of the 13F portfolio, value $10,841,087.
13F-HR 0001172661-26-003496 filed by MAIRS & POWER INC
Filed 2026-08-14 (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 117,581 shares
Change vs previous 13F not available
0.06% of the 13F portfolio, value $6,052,482.
13F-HR 0001172661-26-001819 filed by MAIRS & POWER INC
Filed 2026-05-14 (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).