MAIRS & POWER INC: MSI position timeline

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

MAIRS & POWER INC held 544,876 MSI 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 544,876 shares
Change vs previous 13F +4,144 shares
2.08% of the 13F portfolio, value $226,281,554.
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 540,732 shares
Change vs previous 13F +15,518 shares
2.4% of the 13F portfolio, value $234,661,466.
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).
period ended2025-12-31
13F 525,214 shares
Change vs previous 13F +64,985 shares
1.94% of the 13F portfolio, value $201,325,030.
13F-HR 0001172661-26-001057 filed by MAIRS & POWER INC
Filed 2026-02-17 (acceptance time not in the bulk data set), ingested 2026-10-07 03:01:36 UTC
Acceptance time not in the bulk data set (spec §4.2).
period ended2025-09-30
13F 460,229 shares
Change vs previous 13F -14,877 shares
1.98% of the 13F portfolio, value $210,458,119.
13F-HR 0001172661-25-004985 filed by MAIRS & POWER INC
Filed 2025-11-14 (acceptance time not in the bulk data set), ingested 2026-10-07 03:02:25 UTC
Acceptance time not in the bulk data set (spec §4.2).
period ended2025-06-30
13F 475,106 shares
Change vs previous 13F -2,499 shares
1.97% of the 13F portfolio, value $199,763,069.
13F-HR 0001172661-25-003391 filed by MAIRS & POWER INC
Filed 2025-08-14 (acceptance time not in the bulk data set), ingested 2026-10-07 18:23:11 UTC
Acceptance time not in the bulk data set (spec §4.2).
period ended2025-03-31
13F 477,605 shares
Change vs previous 13F -6,933 shares
2.18% of the 13F portfolio, value $209,100,245.
13F-HR 0001172661-25-002089 filed by MAIRS & POWER INC
Filed 2025-05-15 (acceptance time not in the bulk data set), ingested 2026-10-07 18:25:06 UTC
Acceptance time not in the bulk data set (spec §4.2).
period ended2024-12-31
13F 484,538 shares
Change vs previous 13F -4,214 shares
2.17% of the 13F portfolio, value $223,968,000.
13F-HR 0001172661-25-000936 filed by MAIRS & POWER INC
Filed 2025-02-14 (acceptance time not in the bulk data set), ingested 2026-10-07 18:25:55 UTC
Acceptance time not in the bulk data set (spec §4.2).
period ended2024-09-30
13F 488,752 shares
Change vs previous 13F not available
2.07% of the 13F portfolio, value $219,757,562.
13F-HR 0001172661-24-004776 filed by MAIRS & POWER INC
Filed 2024-11-14 (acceptance time not in the bulk data set), ingested 2026-10-07 18:26:56 UTC
Acceptance time not in the bulk data set (spec §4.2).