Institutional Manager · CIK 0001070134

MAIRS & POWER INC

St Paul, MN · File #028-07342

Latest AUM

$10.39B

Positions

243

Top-10 Concentration

52.0%

Filings

Portfolio Value Over Time

2024-03

2024-06

2024-09

2024-12

2025-03

2025-06

2025-09

2025-12

Biggest QoQ Changes

Ranked by conviction flow (share change × current price) so mark-to-market moves don't dominate. Price effect column shows how much of the $ change was just the stock moving.

Action	Issuer	Ticker / CUSIP	Δ Shares	Flow ($)	Price Effect
REDUCE	NVIDIA CORPORATION	NVDA	-626,772	-$116.9M	-$446,011
REDUCE	UNITEDHEALTH GROUP INC	UNH	-239,412	-$79.0M	-$16.3M
REDUCE	WELLS FARGO CO NEW	949746101	-442,996	-$41.3M	+$20.4M
ADD	META PLATFORMS INC	META	+59,602	+$39.3M	-$19.1M
REDUCE	JOHNSON & JOHNSON	JNJ	-181,156	-$37.5M	+$21.2M
NEW	INTUITIVE SURGICAL INC	ISRG	+62,277	+$35.3M	$0
REDUCE	ROCKWELL AUTOMATION INC	ROK	-80,443	-$31.3M	+$16.2M
ADD	ZOETIS INC	ZTS	+224,910	+$28.3M	-$30,545
REDUCE	JPMORGAN CHASE & CO.	VYLD	-85,126	-$27.4M	+$9.2M
ADD	MOTOROLA SOLUTIONS INC	MSI	+64,985	+$24.9M	-$34.0M

Sector Allocation

Technology

31.0%$3.22B

Industrials

12.2%$1.27B

Healthcare

11.1%$1.16B

Consumer Discretionary

6.5%$674.8M

Materials

4.9%$509.1M

Financials

4.5%$467.5M

Utilities

4.3%$444.7M

Communication Services

3.3%$346.3M

Energy

2.8%$286.6M

Consumer Staples

1.8%$182.2M

Real Estate

0.0%$855,612

Filing History

Feb 17, 202613F HOLDINGS REPORTQ/E Dec 2025243 pos · $10.39B
Nov 14, 202513F HOLDINGS REPORTQ/E Sep 2025248 pos · $10.64B
Aug 14, 202513F HOLDINGS REPORTQ/E Jun 2025235 pos · $10.13B
May 15, 202513F HOLDINGS REPORTQ/E Mar 2025221 pos · $9.61B
Feb 14, 202513F HOLDINGS REPORTQ/E Dec 2024229 pos · $10.34B
Nov 14, 202413F HOLDINGS REPORTQ/E Sep 2024228 pos · $10.63B
Aug 14, 202413F HOLDINGS REPORTQ/E Jun 2024222 pos · $10.35B
May 15, 202413F HOLDINGS REPORTQ/E Mar 2024226 pos · $10.33B
Nov 14, 202313F HOLDINGS REPORTQ/E Dec 2023214 pos · $8.52B

Top 20 Holdings — Dec 2025

#	Issuer	Ticker	Shares	Value	% of Portfolio
1	MICROSOFT CORP	MSFT	1,912,896	$925.1M	9.68%
2	NVIDIA CORPORATION	NVDA	4,949,648	$923.1M	9.66%
3	AMAZON COM INC	AMZN	2,592,768	$598.5M	6.26%
4	ALPHABET INC	GOOG	1,697,969	$532.8M	5.57%
5	JPMORGAN CHASE & CO.	VYLD	1,276,404	$411.3M	4.30%
6	ELI LILLY & CO	LLY	345,345	$371.1M	3.88%
7	APPLE INC	AAPL	1,217,486	$331.0M	3.46%
8	GRACO INC	GGG	3,905,582	$320.1M	3.35%
9	VISA INC	V	802,518	$281.5M	2.94%
10	UNITEDHEALTH GROUP INC	UNH	830,535	$274.2M	2.87%
11	TORO CO	TORO	3,422,823	$269.4M	2.82%
12	NVENT ELECTRIC PLC	NVT	2,111,211	$215.3M	2.25%
13	META PLATFORMS INC	META	316,529	$208.9M	2.19%
14	ECOLAB INC	ECL	770,571	$202.3M	2.12%
15	MOTOROLA SOLUTIONS INC	MSI	525,214	$201.3M	2.11%
16	WEC ENERGY GROUP INC	WEC	1,908,774	$201.3M	2.11%
17	LITTELFUSE INC	LFUS	778,951	$197.0M	2.06%
18	ALLIANT ENERGY CORP	LNT	2,956,947	$192.2M	2.01%
19	FASTENAL CO	FAST	4,667,499	$187.3M	1.96%
20	JOHNSON & JOHNSON	JNJ	804,346	$166.5M	1.74%