MAIRS & POWER INC

CIK 0001070134 · Q1 2026

13F Equity AUM

$9.8B

-5.8% QoQ

Positions

245

+2 QoQ

AUM Rank

#648

Top 5%

Skill Alpha (FF)

-0.7%/yr^ns

No Clear Edge

Rank #3,312 · Top 40%

vs S&P -3.3%/yr (unadj.)

Quarters Tracked

~13 years

Portfolio Concentration

Top 5: 29.4%Top 10: 44.0%Top 20: 65.3%

NVDA8.5%

MSFT7.3%

AMZN5.5%

GOOG4.7%

GGG3.3%

JPM3.2%

AAPL3.1%

LLY3.1%

V2.6%

TTC2.6%

Others (235)56.0%

HHI (Herfindahl-Hirschman Index) measures portfolio concentration. Low (<1500) = diversified, Moderate (1500-2500), High (>2500) = concentrated bets.

Sector Allocation

Technology32.4%

Industrials16.9%

Healthcare10.8%

Financial Services9.8%

Communication Services8.7%

Consumer Cyclical7.0%

Utilities5.3%

Basic Materials5.2%

Other3.7%

Portfolio weight by GICS sector based on latest 13F filing. Sectors below 2% are grouped as “Other.”

Position Sizing

Positions: 245Median: 0.02%Avg: 0.41%

0–0.5%

204(12.9%)

0.5–1%

11(7.8%)

1–3%

22(40.5%)

3–5%

5(17.4%)

5%+

3(21.4%)

Count of positions per weight bucket — (%) = combined portfolio weight

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Portfolio Overlap

Shared: 244Unique: 1vs 20 funds

3.3%Low

245

Fund positions

7,299

Consensus CUSIPs

Jaccard similarity of this fund’s portfolio vs the consensus of top 20 funds by AUM. Low (<15%) = contrarian, Moderate (15-40%), High (>40%) = follows the crowd.

Most Similar Funds

Top 9 benchmark funds with highest portfolio overlap (Jaccard similarity)

MORGAN STANLEY

4.7%

BlackRock, Inc.

6.1%

BANK OF AMERICA CORP /DE/

5.1%

JPMORGAN CHASE & CO

FMR LLC

8.1%

STATE STREET CORP

6.4%

VANGUARD CAPITAL MANAGEMENT LLC

6.1%

GEODE CAPITAL MANAGEMENT, LLC

VANGUARD PORTFOLIO MANAGEMENT LLC

7.2%

Jaccard similarity per fund: shared CUSIPs / (fund A + fund B − shared). Higher values indicate more similar portfolios.

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Position Changes This Quarter

New22Increased62Decreased106Exited20

New Positions

PIPER SANDLER COMPAN…0.4%

+546K

SFM0.2%

+292K

VOO0.1%

+15K

AMBA0.1%

+118K

SOLS0.0%

+22K

APG0.0%

+58K

VONE0.0%

+3K

VGLT0.0%

+13K

MDY0.0%

+819

GQ90.0%

+1K

Increased

FISV1.2%

+510K(+31%)

WM0.9%

+397K(+39724%)

PANW0.9%

+312K(+141%)

A4S0.9%

+154K(+362%)

BSY0.1%

+153K(+185%)

JAMES HARDIE INDS PL…0.1%

+150K(+166%)

MINN0.1%

+86K(+27%)

ZTS0.4%

+77K(+34%)

CGNX0.6%

+52K(+4%)

VEA0.0%

+40K(+782%)

Decreased

KHC0.1%

-1,356,268(-81%)

FAST1.9%

-745,057(-16%)

TTC2.6%

-703,840(-21%)

HRL0.8%

-371,554(-10%)

WFC1.1%

-363,465(-21%)

TN10.6%

-268,160(-25%)

CRM0.1%

-246,017(-83%)

JNJ1.4%

-226,756(-28%)

JPM3.2%

-222,207(-17%)

NVDA8.5%

-188,297(-4%)

Exited

-175,861

-57,616

-173,245

-10,535

-92,510

-17,236

-52,946

-88,520

-25,310

-20,045

Quarter-over-quarter changes compared to prior 13F filing. New = first appearance; Exited = no longer held.

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Holdings

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