M&
Mairs & Power Inc — 13F Portfolio Changes & Top Buys (Q2 2026)
Mairs & Power IncCIK: 0001070134
Diversified strategyMomentum followerQuality / disciplined sizing
Total reported value
$10.9B
Reporting period: 2026-06-30 · Number of holdings: 254
MAIRS & POWER INC disclosed 254 holdings in its latest 13F filing for the period ending 2026-06-30, with total reported value of $10.9B and a quarterly turnover rate of 17.4%.
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Personality snowflake
- Concentration
- 12.34
- Portfolio Stability
- 17.36
- Momentum
- 100
- Sector conviction
- 54.45
- Diversification
- 100
- Sizing Uniformity
- 73.81
Mairs & Power Inc's disclosed holdings carry a Herfindahl concentration index of 0.031 — mathematically equivalent to about 32 equally-sized positions, well below its 254 actual disclosed holdings. That gap points to a strategy built around a small core of high-conviction bets rather than broad diversification.
Position sizes vary widely across the portfolio (a coefficient of variation of 2.62), with a handful of outsized bets alongside many smaller positions.
No strong tilt toward either adding to existing winners or initiating outsized new positions was observed in the latest reported quarter.
Source and citation information
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Recent moves
View source Form 13F filing on SEC.govAdd PANW
+12.6% $119.2M
Add GOOG
+4.5% $132.5M
Add NVT
-0.7% $103.8M
Trim GGG
-0.5% -$35.9M
Trim MSFT
+0.4% $8.6M
New buy AJG
Holdings Map
New buyAddUnchangedTrim
Top 10 holdings by weight
Full holdings list this quarter
Showing top 200 holdings (of 254 total)
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | NVDA | Nvidia CORP | Stock-Tech | 8.64% | +0.15% | -1.12% | |
| 2 | MSFT | Microsoft CORP | Stock-Tech | 6.68% | -0.67% | +0.43% | |
| 3 | AMZN | Amazon.com Inc | Stock-Consumer Disc | 5.68% | +0.14% | -0.13% | |
| 4 | GOOG | Alphabet Inc-cl C | Stock-Comm Services | 5.46% | +0.74% | +4.46% | |
| 5 | LLY | Eli Lilly & Co | Stock-Healthcare | 3.54% | +0.47% | -1.28% | |
| 6 | NVT | nVent Electric plc | Stock-Industrials | 3.19% | +0.69% | -0.66% | |
| 7 | AAPL | Apple Inc | Stock-Tech | 3.02% | -0.11% | -5.79% | |
| 8 | JPM | Jpmorgan Chase & Co | Stock-Financials | 2.77% | -0.40% | -12.39% | |
| 9 | V | Visa Inc-class A Shares | Stock-Financials | 2.68% | +0.08% | +1.32% | |
| 10 | GGG | Graco Inc | Stock-Industrials | 2.63% | -0.67% | -0.48% | |
| 11 | LFUS | Littelfuse Inc | Stock-Tech | 2.52% | +0.01% | -16.92% | |
| 12 | TTC | Toro Co | Stock-Industrials | 2.39% | -0.21% | -1.56% | |
| 13 | ENTG | Entegris Inc | Stock-Tech | 2.15% | +0.54% | -3.09% | |
| 14 | UNH | Unitedhealth Group Inc | Stock-Healthcare | 2.14% | +0.09% | -24.44% | |
| 15 | TSM | Taiwan Semiconductor-sp Adr | Stock-Tech | 2.09% | +0.41% | -2.06% | |
| 16 | MSI | Motorola Solutions Inc | Stock-Tech | 2.08% | -0.32% | +0.77% | |
| 17 | ECL | Ecolab Inc | Stock-Materials | 1.99% | -0.08% | +2.06% | |
| 18 | WEC | Wec Energy Group Inc | Stock-Utilities | 1.92% | -0.34% | -6.43% | |
| 19 | PANW | Palo Alto Networks Inc | Stock-Tech | 1.88% | +1.01% | +12.61% | |
| 20 | LNT | Alliant Energy CORP | Stock-Utilities | 1.86% | -0.26% | -8.00% | |
| 21 | TECH | Bio-techne CORP | Stock-Healthcare | 1.75% | +0.28% | -1.80% | |
| 22 | META | Meta Platforms Inc-class A | Stock-Comm Services | 1.72% | -0.18% | +2.54% | |
| 23 | FAST | Fastenal Co | Stock-Industrials | 1.71% | -0.15% | -1.31% | |
| 24 | SHW | Sherwin-williams Co/the | Stock-Materials | 1.39% | -0.04% | +0.65% | |
| 25 | CHRW | C.h. Robinson Worldwide Inc | Stock-Industrials | 1.33% | -0.11% | -9.14% | |
| 26 | FUL | H.b. Fuller Co. | Stock-Materials | 1.30% | -0.19% | +3.11% | |
| 27 | VZ | Verizon Communications Inc | Stock-Comm Services | 1.28% | -0.42% | -0.71% | |
| 28 | WM | Waste Management Inc | Stock-Industrials | 1.21% | +0.27% | +48.41% | |
| 29 | ROK | Rockwell Automation Inc | Stock-Industrials | 1.17% | +0.13% | -9.08% | |
| 30 | FISV | Fiserv Inc | Stock-Other | 1.03% | -0.20% | +6.51% | |
| 31 | JNJ | Johnson & Johnson | Stock-Healthcare | 0.99% | -0.45% | -26.76% | |
| 32 | AMP | Ameriprise Financial Inc | Stock-Financials | 0.90% | +0.01% | +8.63% | |
| 33 | CGNX | Cognex CORP | Stock-Tech | 0.87% | +0.26% | +6.86% | |
| 34 | HRL | Hormel Foods CORP | Stock-Consumer Staples | 0.77% | -0.02% | -0.58% | |
| 35 | CASY | Casey's General Stores Inc | Stock-Consumer Disc | 0.66% | -0.05% | -5.02% | |
| 36 | WFC | Wells Fargo & Co | Stock-Financials | 0.66% | -0.45% | -36.14% | |
| 37 | AJG | Arthur J Gallagher & Co | Stock-Financials | 0.66% | +0.66% | NEW | |
| 38 | ABT | Abbott Laboratories | Stock-Healthcare | 0.61% | -0.15% | +1.05% | |
| 39 | TXN | Texas Instruments Inc | Stock-Tech | 0.59% | +0.13% | -5.93% | |
| 40 | TNC | Tennant Co | Stock-Other | 0.55% | — | -15.14% | |
| 41 | ISRG | Intuitive Surgical Inc | Stock-Healthcare | 0.53% | +0.06% | +46.63% | |
| 42 | MMM | 3m Co | Stock-Industrials | 0.52% | — | -0.71% | |
| 43 | HD | Home Depot Inc | Stock-Consumer Disc | 0.49% | -0.03% | -0.62% | |
| 44 | TRV | Travelers Cos Inc/the | Stock-Financials | 0.47% | +0.05% | +9.88% | |
| 45 | AXP | American Express Co | Stock-Financials | 0.45% | -0.01% | -2.16% | |
| 46 | IDA | Idacorp Inc | Stock-Utilities | 0.43% | -0.01% | +2.85% | |
| 47 | MEDP | Medpace Holdings Inc | Stock-Healthcare | 0.42% | — | +1.16% | |
| 48 | CME | Cme Group Inc | Stock-Financials | 0.40% | +0.40% | NEW | |
| 49 | DCI | Donaldson Co Inc | Stock-Industrials | 0.38% | -0.05% | -7.14% | |
| 50 | WK | Workiva Inc | Stock-Tech | 0.37% | -0.07% | +15.91% |
1–50 of 200
Portfolio Performance
Performance for Q3 2026
+3.9%
Performance Last 4 Quarters
+17.3%
- Stdev
- +13.4%
- Beta
- +1
- Alpha
- -4.2%
- Max Drawdown
- -11.7%
- Annualized Perf
- +16%
- Batting Avg vs S&P
- +38.9%
- Sortino
- +2.2
- Stutzer
- +0.35
- Treynor
- +0.16
- Sterling
- +0.92
- Calmar
- +1.36
- Information Ratio
- -1.19
- Tracking Error
- +3.5%
- Stdev Down
- +7.2%
- Winning Months %
- +69.4%
- Losing Months %
- +30.6%
- Best 12 Months
- +33.6%
- Worst 12 Months
- +1.1%
- Efficiency Ratio
- +0.48
- Sharpe
- +1.18
- Stdev Sectors
- +9.1%
- Skewness
- +0.05
- Kurtosis
- +0.02
- Upside Potential
- +3.8
Reported value over time
Sector allocation
Sector allocation over time
Quarterly history
| Period | Holdings | Total value | Stability | Top holdings | |
|---|---|---|---|---|---|
| 2026 Q2 | 254 | $10.9B | 17 | ||
| 2026 Q1 | 245 | $9.8B | 20 | ||
| 2025 Q4 | 243 | $10.4B | 12 | ||
| 2025 Q3 | 248 | $10.6B | 25 | ||
| 2025 Q2 | 235 | $10.1B | 0 | ||
| 2025 Q1 | 221 | $9.6B | 100 | ||
| 2024 Q4 | 229 | $10.3B | 0 | ||
| 2024 Q3 | 228 | $10.6B | 0 | ||
| 2024 Q2 | 222 | $10.3B | 0 | ||
| 2024 Q1 | 226 | $10.3B | 0 | ||
| 2023 Q4 | 231 | $9.5B | 0 | ||
| 2023 Q3 | 214 | $8.5B | 0 | ||
| 2023 Q2 | 226 | $9.2B | 0 | ||
| 2023 Q1 | 236 | $8.7B | 0 | ||
| 2022 Q4 | 227 | $8.3B | 0 | ||
| 2022 Q3 | 221 | $7.9B | 0 | ||
| 2022 Q2 | 202 | $8.3B | 0 | ||
| 2022 Q1 | 216 | $9.9B | 0 | ||
| 2021 Q4 | 218 | $10.8B | 0 | ||
| 2021 Q3 | 210 | $10.0B | 0 | ||
| 2021 Q2 | 212 | $10.1B | 97 | ||
| 2021 Q1 | 216 | $9.5B | 10 | ||
| 2020 Q4 | 213 | $9.0B | 16 | ||
| 2020 Q3 | 199 | $8.0B | 10 | ||
| 2020 Q2 | 201 | $7.7B | 19 | ||
| 2020 Q1 | 198 | $6.9B | 29 | ||
| 2019 Q4 | 220 | $8.8B | 10 | ||
| 2019 Q3 | 214 | $8.3B | 9 | ||
| 2019 Q2 | 218 | $8.3B | 12 | ||
| 2019 Q1 | 212 | $8.2B | 14 | ||
| 2018 Q4 | 200 | $7.4B | 16 | ||
| 2018 Q3 | 216 | $8.6B | 12 | ||
| 2018 Q2 | 214 | $8.1B | 12 | ||
| 2018 Q1 | 203 | $8.1B | 12 | ||
| 2017 Q4 | 199 | $8.6B | 8 | ||
| 2017 Q3 | 201 | $8.3B | 8 | ||
| 2017 Q2 | 199 | $8.3B | 9 | ||
| 2017 Q1 | 203 | $8.2B | 16 | ||
| 2016 Q4 | 189 | $7.8B | 8 | ||
| 2016 Q3 | 194 | $7.6B | 9 | ||
| 2016 Q2 | 189 | $7.4B | 11 | ||
| 2016 Q1 | 188 | $7.0B | 10 | ||
| 2015 Q4 | 190 | $6.7B | 9 | ||
| 2015 Q3 | 174 | $6.4B | 14 | ||
| 2015 Q2 | 181 | $7.1B | 6 | ||
| 2015 Q1 | 187 | $7.3B | 7 | ||
| 2014 Q4 | 193 | $7.2B | 15 | ||
| 2014 Q3 | 193 | $6.9B | 10 | ||
| 2014 Q2 | 196 | $7.1B | 12 | ||
| 2014 Q1 | 205 | $6.7B | 8 | ||
| 2013 Q4 | 210 | $6.5B | 13 | ||
| 2013 Q3 | 186 | $5.8B | 12 | ||
| 2013 Q2 | 179 | $5.2B | 0 |
Holding changes this quarter
Mairs & Power Inc's most significant position changes for 2026-06-30: New buy: Arthur J Gallagher & Co (AJG); Sold out: Honeywell International Inc (HON); New buy: Cme Group Inc (CME); New buy: ; New buy: Mge Energy Inc (MGEE).
Showing top 200 changes by size (of 262 total)
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | PANW | Palo Alto Networks Inc | +1% | +12.61% | Add |
| 2 | GOOG | Alphabet Inc-cl C | +0.7% | +4.46% | Add |
| 3 | NVT | nVent Electric plc | +0.7% | -0.66% | Trim |
| 4 | AJG | Arthur J Gallagher & Co | +0.7% | NEW | New buy |
| 5 | ENTG | Entegris Inc | +0.5% | -3.09% | Trim |
| 6 | LLY | Eli Lilly & Co | +0.5% | -1.28% | Trim |
| 7 | TSM | Taiwan Semiconductor-sp Adr | +0.4% | -2.06% | Trim |
| 8 | CME | Cme Group Inc | +0.4% | NEW | New buy |
| 9 | TECH | Bio-techne CORP | +0.3% | -1.80% | Trim |
| 10 | WM | Waste Management Inc | +0.3% | +48.41% | Add |
| 11 | CGNX | Cognex CORP | +0.3% | +6.86% | Add |
| 12 | ✓ | +0.2% | NEW | New buy | |
| 13 | BSY | Bentley Systems Inc-class B | +0.2% | +310.79% | Add |
| 14 | NVDA | Nvidia CORP | +0.2% | -1.12% | Trim |
| 15 | AMZN | Amazon.com Inc | +0.1% | -0.13% | Trim |
| 16 | ROK | Rockwell Automation Inc | +0.1% | -9.08% | Trim |
| 17 | TXN | Texas Instruments Inc | +0.1% | -5.93% | Trim |
| 18 | SFM | Sprouts Farmers Market Inc | +0.1% | +54.64% | Add |
| 19 | UNH | Unitedhealth Group Inc | +0.1% | -24.44% | Trim |
| 20 | V | Visa Inc-class A Shares | +0.1% | +1.32% | Add |
| 21 | GLW | Corning Inc | +0.1% | -3.18% | Trim |
| 22 | ISRG | Intuitive Surgical Inc | +0.1% | +46.63% | Add |
| 23 | TRV | Travelers Cos Inc/the | +0.1% | +9.88% | Add |
| 24 | GNRC | Generac Holdings Inc | +0.1% | -6.37% | Trim |
| 25 | CAT | Caterpillar Inc | +0.1% | -1.89% | Trim |
| 26 | AMBA | Ambarella, Inc. | 0% | +7.46% | Add |
| 27 | ALRS | Alerus Financial CORP | 0% | +156.08% | Add |
| 28 | AMAT | Applied Materials Inc | 0% | -2.83% | Trim |
| 29 | IVV | Ishares Core S&p 500 ETF | 0% | +64.90% | Add |
| 30 | GOOGL | Alphabet Inc-cl A | 0% | -2.94% | Trim |
| 31 | PLXS | Plexus CORP | 0% | -14.37% | Trim |
| 32 | LFUS | Littelfuse Inc | 0% | -16.92% | Trim |
| 33 | AMP | Ameriprise Financial Inc | 0% | +8.63% | Add |
| 34 | LTH | Life Time Group Holdings Inc | 0% | — | Unchanged |
| 35 | JBTM | Jbt Marel CORP | 0% | +14.15% | Add |
| 36 | AIR | Aar CORP | 0% | -6.11% | Trim |
| 37 | PATK | Patrick Industries Inc | 0% | +63.79% | Add |
| 38 | JHX | James Hardie Industries plc | 0% | -0.02% | Trim |
| 39 | TREX | Trex Company Inc | 0% | — | Unchanged |
| 40 | MINN | Mairs & Power Mn Muni Bond | 0% | +14.56% | Add |
| 41 | WTFC | Wintrust Financial CORP | 0% | +1.58% | Add |
| 42 | INTC | Intel CORP | 0% | +1.40% | Add |
| 43 | MGEE | Mge Energy Inc | 0% | NEW | New buy |
| 44 | ASB | Associated Banc-corp | 0% | — | Unchanged |
| 45 | IWP | Ishares Russell Mid-cap Grow | 0% | NEW | New buy |
| 46 | IJH | Ishares Core S&p Midcap ETF | 0% | NEW | New buy |
| 47 | PII | Polaris Inc | 0% | -1.89% | Trim |
| 48 | IWR | Ishares Russell Mid-cap ETF | 0% | NEW | New buy |
| 49 | GE | General Electric | 0% | — | Unchanged |
| 50 | AMD | Advanced Micro Devices | 0% | -14.61% | Trim |
1–50 of 200
Filing History
FAQ
What is Mairs & Power Inc and what type of investor is it?
Mairs & Power Inc is an investment manager that files SEC Form 13F quarterly, disclosing its U.S. public equity holdings to regulators. As of the most recent reporting period (2026-06-30), the firm manages a tracked equity portfolio valued at approximately $10.9B, spread across 254 disclosed positions.
What are Mairs & Power Inc's largest equity positions?
Based on the latest 13F filing, Mairs & Power Inc's top holdings by market value are:
1. Nvidia CORP (NVDA) — $942.0M (8.6%)
2. Microsoft CORP (MSFT) — $727.7M (6.7%)
3. Amazon.com Inc (AMZN) — $619.6M (5.7%)
4. Alphabet Inc-cl C (GOOG) — $594.8M (5.5%)
5. Eli Lilly & Co (LLY) — $386.4M (3.5%)
What changes did Mairs & Power Inc make in its most recent portfolio filing?
In the latest reported quarter, Mairs & Power Inc made 161 notable position adjustments: 17 new positions were initiated, 45 existing holdings were added to, 91 positions were partially reduced, and 8 were completely exited. The largest of these moves: New buy: Arthur J Gallagher & Co (AJG); Sold out: Honeywell International Inc (HON); New buy: Cme Group Inc (CME); New buy: ; New buy: Mge Energy Inc (MGEE)
What sectors does Mairs & Power Inc focus on?
Mairs & Power Inc is concentrated in the following sectors based on its current disclosed equity portfolio:
• Information Technology: 33.5%
• Industrials: 16.2%
• Health Care: 11.3%
• Financials: 10.8%
• Communication Services: 9.1%
• Consumer Discretionary: 7.5%
Investment Profile
Mairs & Power Inc returned an annualized 16.0% over the trailing 36 months — underperforming the S&P 500 by 4.2 points — based on a reconstructed track record of its disclosed 13F positions, with a beta of 1.00 (roughly in line with the market) and a 39% quarterly batting average against the index.
Its portfolio is broadly diversified and long-term-holding, with 33.5% of the portfolio concentrated in Information Technology.
Its turnover score has risen from 0 to 17 over the past 4 quarters — a shift toward more active trading.
It has added to its PANW position over the past two quarters (+$163.9M, now $204.6M), while trimming JPM over the same stretch (-$109.0M, still holding $302.3M).
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Developer Access
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