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Super Investors MAIRS & POWER INC
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MAIRS & POWER INC

Quarterly 13F snapshot: US-listed longs only, no performance figures — 13F data cannot support them.

Portfolio value
$10.9B
Positions
254
Quarter ended
June 30, 2026
Filed
August 14, 2026

Reported portfolio value by quarter (53 quarters reported)

$10.9B $5.23B
Q2 13 Q1 16 Q4 18 Q3 21 Q2 24 Q2 26

$5.23B in Q2 2013 → $10.9B now. Hover for any quarter.

Holdings

As reported for the quarter ended June 30, 2026. Activity is the change in share count since the prior quarter's filing.

Holding % of portfolio Activity Shares Value
Nvidia Corporation 8.6% Trimmed 1.1% 4,707,792 $942M
Microsoft Corp 6.7% Added 0.4% 1,950,737 $728M
Amazon Com Inc 5.7% Trimmed 0.1% 2,599,441 $620M
Alphabet Inc 5.5% Added 4.5% 1,683,439 $595M
EL Eli Lilly & Co 3.5% Trimmed 1.3% 322,129 $386M
NE Nvent Elec PLC 3.2% Trimmed 0.7% 2,052,813 $348M
Apple Inc 3.0% Trimmed 5.8% 1,138,448 $329M
Jpmorgan Chase & Co 2.8% Trimmed 12% 923,550 $302M
Visa Inc 2.7% Added 1.3% 852,050 $292M
Graco Inc 2.6% Trimmed 0.5% 3,797,451 $287M
Littelfuse Inc 2.5% Trimmed 17% 602,104 $274M
Toro Co 2.4% Trimmed 1.6% 2,676,474 $261M
Entegris Inc 2.1% Trimmed 3.1% 1,301,640 $234M
Unitedhealth Group Inc 2.1% Trimmed 24% 559,951 $233M
TS Taiwan Semiconductor Manufac 2.1% Trimmed 2.1% 476,245 $227M
Motorola Solutions Inc 2.1% Added 0.8% 544,876 $226M
Ecolab Inc 2.0% Added 2.1% 777,541 $217M
Wec Energy Group Inc 1.9% Trimmed 6.4% 1,787,905 $209M
Palo Alto Networks Inc 1.9% Added 13% 599,841 $205M
Alliant Energy Corp 1.9% Trimmed 8.0% 2,657,913 $203M
Bio-techne Corp 1.8% Trimmed 1.8% 2,700,698 $191M
Meta Platforms Inc 1.7% Added 2.5% 332,871 $188M
Fastenal Co 1.7% Trimmed 1.3% 3,870,891 $186M
Sherwin Williams Co 1.4% Added 0.6% 440,586 $152M
CH C H Robinson Worldwide In 1.3% Trimmed 9.1% 770,708 $145M
FH Fuller H B Co 1.3% Added 3.1% 2,435,168 $142M
Verizon Communications Inc 1.3% Trimmed 0.7% 3,291,850 $139M
WM Waste Mgmt Inc Del 1.2% Added 48% 591,025 $132M
Rockwell Automation Inc 1.2% Trimmed 9.1% 257,811 $128M
Fiserv Inc 1.0% Added 6.5% 2,293,029 $112M
Johnson & Johnson 1.0% Trimmed 27% 423,010 $107M
AF Ameriprise Finl Inc 0.9% Added 8.6% 214,056 $98.2M
Cognex Corp 0.9% Added 6.9% 1,307,856 $94.7M
Hormel Foods Corp 0.8% Trimmed 0.6% 3,398,047 $84.3M
CG Caseys Gen Stores Inc 0.7% Trimmed 5.0% 91,125 $72.4M
Wells Fargo & Co 0.7% Trimmed 36% 872,186 $72.1M
GA Gallagher Arthur J & Co 0.7% New 311,539 $71.5M
Abbott Laboratories 0.6% Added 1.1% 729,358 $66.2M
TI Texas Instrs Inc 0.6% Trimmed 5.9% 217,453 $64.8M
Tennant Co 0.5% Trimmed 15% 681,800 $59.7M
Intuitive Surgical Inc 0.5% Added 47% 146,459 $58.2M
3m Co 0.5% Trimmed 0.7% 349,350 $56.6M
Home Depot Inc 0.5% Trimmed 0.6% 152,452 $53.8M
Travelers Companies Inc 0.5% Added 9.9% 156,482 $51.7M
American Express Co 0.5% Trimmed 2.2% 145,612 $49.3M
Idacorp Inc 0.4% Added 2.9% 309,970 $46.9M
MH Medpace Hldgs Inc 0.4% Added 1.2% 86,715 $45.9M
Cme Group Inc 0.4% New 195,585 $43.2M
Donaldson Inc 0.4% Trimmed 7.1% 463,717 $41.6M
Workiva Inc 0.4% Added 16% 829,491 $40.2M
Piper Sandler Companies 0.4% Trimmed 0.3% 544,505 $39.4M
SF Sprouts Fmrs Mkt Inc 0.4% Added 55% 451,826 $38.2M
Procter & Gamble Co 0.3% Added 0.8% 245,423 $36M
UB Us Bancorp 0.3% Trimmed 6.7% 561,453 $33.9M
Zoetis Inc 0.3% Added 54% 467,515 $33.6M
Qualcomm Inc 0.3% Trimmed 62% 179,832 $33.2M
Xcel Energy Inc 0.3% Trimmed 2.4% 392,497 $31.5M
BS Bentley Sys Inc 0.3% Added 311% 970,114 $29M
AD Automatic Data Processing In 0.3% Added 2.2% 127,173 $28.5M
Medtronic PLC 0.3% Trimmed 9.6% 363,349 $28.4M

Showing top 60 of 254 positions.

Timeline of changes

What changed each quarter, from the filings' own share counts. Largest moves first; most recent 8 quarters.

Q2 2026

quarter ended June 30, 2026 · filed August 14, 2026

Company Action Shares changed Value of change % of portfolio
Unitedhealth Group Inc Trimmed −181,132 −$75.3M 2.1%
GA Gallagher Arthur J & Co New +311,539 +$71.5M 0.7%
Littelfuse Inc Trimmed −122,606 −$55.8M 2.5%
Qualcomm Inc Trimmed −298,223 −$55.1M 0.3%
HI Honeywell Intl Inc Exited −208,448 −$47.1M —
Cme Group Inc New +195,585 +$43.2M 0.4%
WM Waste Mgmt Inc Del Added +192,785 +$43M 1.2%
Jpmorgan Chase & Co Trimmed −130,647 −$42.8M 2.8%
Wells Fargo & Co Trimmed −493,690 −$40.8M 0.7%
Johnson & Johnson Trimmed −154,580 −$39.3M 1.0%

Showing the 10 largest of 190 changes.

Q1 2026

quarter ended March 31, 2026 · filed May 14, 2026

Company Action Shares changed Value of change % of portfolio
WM Waste Mgmt Inc Del Added +397,240 +$91.3M 0.9%
AF Ameriprise Finl Inc Added +154,436 +$68.6M 0.9%
Toro Co Trimmed −703,840 −$65.8M 2.6%
Jpmorgan Chase & Co Trimmed −222,207 −$65.4M 3.2%
Piper Sandler Companies Exited −175,861 −$59.7M —
Johnson & Johnson Trimmed −226,756 −$55.4M 1.4%
Palo Alto Networks Inc Added +312,032 +$50M 0.9%
Salesforce Inc Trimmed −246,017 −$45.9M 0.1%
Piper Sandler Companies New +546,090 +$41.8M 0.4%
Fastenal Co Trimmed −745,057 −$34.6M 1.9%

Showing the 10 largest of 210 changes.

Q4 2025

quarter ended December 31, 2025 · filed February 17, 2026

Company Action Shares changed Value of change % of portfolio
Nvidia Corporation Trimmed −626,772 −$117M 8.9%
Unitedhealth Group Inc Trimmed −239,412 −$79M 2.6%
WF Wells Fargo Co New Trimmed −442,996 −$41.3M 1.6%
Meta Platforms Inc Added +59,602 +$39.3M 2.0%
Johnson & Johnson Trimmed −181,156 −$37.5M 1.6%
Intuitive Surgical Inc New +62,277 +$35.3M 0.3%
Rockwell Automation Inc Trimmed −80,443 −$31.3M 1.2%
Zoetis Inc Added +224,910 +$28.3M 0.3%
Jpmorgan Chase & Co. Trimmed −85,126 −$27.4M 4.0%
Motorola Solutions Inc Added +64,985 +$24.9M 1.9%

Showing the 10 largest of 209 changes.

Q3 2025

quarter ended September 30, 2025 · filed November 14, 2025

Company Action Shares changed Value of change % of portfolio
Microsoft Corp Trimmed −99,261 −$51.4M 9.3%
Qualcomm Inc Trimmed −280,228 −$46.6M 1.0%
Nvidia Corporation Trimmed −236,451 −$44.1M 9.8%
Jpmorgan Chase & Co. Trimmed −139,436 −$44M 4.0%
IT Ishares Tr Trimmed −4,645 −$36.5M —
Wec Energy Group Inc Added +301,323 +$34.5M 1.9%
Fastenal Co Trimmed −653,723 −$32.1M 2.2%
Meta Platforms Inc Added +38,166 +$28M 1.8%
AL Abbott Labs Trimmed −179,057 −$24M 0.9%
Cognex Corp Added +483,517 +$21.9M 0.3%

Showing the 10 largest of 214 changes.

Q2 2025

quarter ended June 30, 2025 · filed August 14, 2025

Company Action Shares changed Value of change % of portfolio
Meta Platforms Inc Added +193,254 +$143M 1.6%
Fastenal Co Added +2,682,904 +$113M 2.2%
Unitedhealth Group Inc Added +150,506 +$47M 3.3%
Jpmorgan Chase & Co. Trimmed −161,804 −$46.9M 4.3%
Best Buy Inc Trimmed −672,762 −$45.2M 0.1%
UB Us Bancorp Del Trimmed −997,454 −$45.1M 0.5%
Apple Inc Trimmed −213,024 −$43.7M 2.3%
Alphabet Inc Trimmed −246,266 −$43.7M 3.2%
PF Principal Financial Group In Trimmed −429,146 −$34.1M 0.3%
Ulta Beauty Inc Trimmed −67,592 −$31.6M —

Showing the 10 largest of 218 changes.

Q1 2025

quarter ended March 31, 2025 · filed May 15, 2025

Company Action Shares changed Value of change % of portfolio
UB Us Bancorp Del Trimmed −2,138,623 −$90.3M 0.9%
Wec Energy Group Inc Added +625,323 +$68.1M 1.6%
TS Taiwan Semiconductor Mfg Ltd New +397,657 +$66M 0.7%
Qualcomm Inc Trimmed −368,523 −$56.6M 1.5%
Alliant Energy Corp Trimmed −869,329 −$55.9M 2.0%
SC Schwab Charles Corp Trimmed −590,359 −$46.2M 0.4%
Fiserv Inc Trimmed −153,852 −$34M 3.9%
Kraft Heinz Co Added +985,915 +$30M 0.8%
Medtronic PLC Trimmed −237,176 −$21.3M 0.5%
EL Eli Lilly & Co Added +25,526 +$21.1M 3.1%

Showing the 10 largest of 196 changes.

Q4 2024

quarter ended December 31, 2024 · filed February 14, 2025

Company Action Shares changed Value of change % of portfolio
Alphabet Inc Trimmed −566,101 −$108M 4.0%
Medtronic PLC Trimmed −1,194,109 −$95.4M 0.6%
Wec Energy Group Inc Added +759,658 +$71.4M 0.7%
Verizon Communications Inc Trimmed −1,339,939 −$53.6M 1.3%
Sysco Corp Trimmed −333,764 −$25.5M 0.3%
Hormel Foods Corp Trimmed −789,113 −$24.8M 1.3%
Nvidia Corporation Trimmed −152,098 −$20.4M 7.6%
Kraft Heinz Co Added +554,492 +$17M 0.4%
HI Honeywell Intl Inc Trimmed −73,815 −$16.7M 0.8%
UB Us Bancorp Del Trimmed −346,903 −$16.6M 1.9%

Showing the 10 largest of 184 changes.

Q3 2024

quarter ended September 30, 2024 · filed November 14, 2024

Company Action Shares changed Value of change % of portfolio
Medtronic PLC Trimmed −970,474 −$87.4M 1.7%
HI Honeywell Intl Inc Trimmed −188,005 −$38.9M 0.8%
Sysco Corp Trimmed −381,219 −$29.8M 0.5%
Kraft Heinz Co New +831,775 +$29.2M 0.3%
PF Principal Financial Group In Trimmed −337,998 −$29M 0.7%
Visa Inc Added +101,837 +$28M 2.0%
UB Us Bancorp Del Trimmed −606,360 −$27.7M 2.0%
Unitedhealth Group Inc Added +46,847 +$27.4M 4.9%
Polaris Inc Trimmed −282,906 −$23.5M 0.1%
Nvidia Corporation Trimmed −148,848 −$18.1M 6.9%

Showing the 10 largest of 197 changes.

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