Stocks/Funds/CIK 1070134

MAIRS & POWER INC

long-term holder
Quarterly 13F filings · Latest period 2026-03-31 · CIK 1070134
Assets
$9.79B
+1.8% YoY
Holdings
245
Lifetime alpha vs market
-1.01% annual
Average hold time
6.6 yr
median 8.0 yr

Quarterly history

Cum return +236% vs S&P +272% · α -37% lifetimeAUM $9.8B · peak $10.8BFlow $-204M (-2%)2016-062017-122019-062020-122022-062023-122025-062026-03
AUM ($B)fundS&P 500(gap = α)/ Flow in/out

Behavior signals (lifetime)

Dip response
+1.32%
adds when stocks drop
when a holding falls −10%+
Middle response
-0.37%
baseline attrition
Rally response
-5.83%
trims into rallies
when a holding rises +10%+

Top positions · 30

Ticker$ value% portYoYHold time
NVDANVIDIA Corporation$830M8.5%+60.9%7.0 yr
MSFTMicrosoft Corporation$719M7.3%-0.6%10.5 yr
AMZNAmazon.com, Inc.$542M5.5%+9.5%10.5 yr
GOOGAlphabet Inc.$462M4.7%+84.3%10.5 yr
GGGGraco Inc.$323M3.3%+2.7%10.5 yr
JPMJPMorgan Chase & Co.$310M3.2%+21.8%10.5 yr
AAPLApple Inc.$307M3.1%+14.7%10.5 yr
LLYEli Lilly and Company$300M3.1%+12.2%10.5 yr
VVisa Inc.$254M2.6%-13.1%10.5 yr
TTCThe Toro Company$254M2.6%+30.4%10.5 yr
LFUSLittelfuse, Inc.$246M2.5%+74.5%8.3 yr
NVTnVent Electric plc$244M2.5%+127.9%8.0 yr
MSIMotorola Solutions, Inc.$235M2.4%+0.2%7.8 yr
WECWEC Energy Group, Inc.$221M2.3%+9.8%10.5 yr
LNTAlliant Energy Corporati$207M2.1%+15.1%10.5 yr

Portfolio composition (YoY)

Industry mix
Semiconductors13.0%+2.9pp$1.27B
Software - Infrastructure8.3%+0.4pp$809M
Internet Content & Information6.8%+3.3pp$664M
Specialty Retail6.3%+0.1pp$613M
Industrial - Machinery5.8%-1.2pp$569M
Regulated Electric5.2%+1.3pp$505M
Drug Manufacturers - General5.1%+0.0pp$499M
Chemicals - Specialty5.1%-0.1pp$494M
Banks - Diversified4.6%-2.2pp$453M
Hardware, Equipment & Parts3.5%+1.3pp$343M
Country
US95.3%-1.5pp
GB2.6%+1.2pp
TW1.7%+1.0pp
IE0.4%-0.1pp
Unknown0.1%-0.6pp
CA0.0%+0.0pp
CH0.0%+0.0pp
Top 5: 29.4% · Top 10: 44.0% · Top 25: 73.0%

Winners

TickerPrev $PnLYoY %
NVDA$629M+0.38B60.9%
GOOG$320M+0.27B84.3%
NVT$123M+0.16B127.9%
LFUS$174M+0.13B74.5%
JPM$408M+0.09B21.8%

Losers

TickerPrev $PnLYoY %
UNH$475M-0.22B-46.9%
V$289M-0.04B-13.1%
TECH$155M-0.02B-10.4%
SHW$165M-0.01B-7.4%
MSFT$749M-0.00B-0.6%

Top buys this quarter · 15

WM Waste Management, Inc.+$91M
AMP Ameriprise Financial, Inc.+$69M
PANW Palo Alto Networks, Inc.+$50M
PIPR Piper Sandler Companiesnew+$42M
SFM Sprouts Farmers Market, Inc.new+$23M
ISRG Intuitive Surgical, Inc.+$17M
V Visa Inc.+$254M
MSFT Microsoft Corporation+$719M
MEDP Medpace Holdings, Inc.+$9M
ZTS Zoetis Inc.+$9M

Top sells this quarter · 15

TTC The Toro Company$66M
JPM JPMorgan Chase & Co.$65M
JNJ Johnson & Johnson$55M
CRM Salesforce, Inc.$46M
FAST Fastenal Company$35M
NVDA NVIDIA Corporation$33M
KHC The Kraft Heinz Company$31M
WFC Wells Fargo & Company$29M
GOOG Alphabet Inc.$25M
UNH UnitedHealth Group Incorporate$24M

Quarterly history (TTM returns)

PeriodAUM# PosReturn (1yr)SPY (1yr)Alpha (1yr)Flow
2026-03-31$9.79B245+14.79%+17.59%-2.80%-0.20B
2025-12-31$10.39B243+12.98%+17.72%-4.74%-0.44B
2025-09-30$10.64B246+11.36%+17.52%-6.16%-0.38B
2025-06-30$10.13B235+6.24%+14.94%-8.70%-0.23B
2025-03-31$9.61B221-0.35%+8.30%-8.65%-0.17B
2024-12-31$10.34B229+14.47%+24.89%-10.41%-0.33B
2024-09-30$10.63B228+29.70%+36.04%-6.33%-0.11B
2024-06-30$10.35B222+17.90%+24.49%-6.59%-0.10B
2024-03-31$10.33B226+27.26%+29.62%-2.36%+0.01B
2023-12-31$9.49B231+21.46%+26.18%-4.72%-0.20B
2023-09-30$8.52B214+14.04%+21.57%-7.53%-0.15B
2023-06-30$9.19B226+16.80%+19.42%-2.62%-0.27B
2023-03-31$8.67B236-5.75%-7.82%+2.07%+0.05B
2022-12-31$8.31B227-13.35%-18.17%+4.83%-0.15B
2022-09-30$7.93B221-9.83%-15.51%+5.68%-0.14B
2022-06-30$8.34B202-6.14%-10.62%+4.48%-0.40B