Mairs & Power 13F, Q1 2026
Mairs & Power · quarter ending 31 March 2026 · filed 14 May 2026 · SEC CIK 1070134
Common stock only: shares the fund reported owning at the quarter end, valued as filed.
Largest positions, Q1 2026
The 25 largest of 245 positions. Weights are against the whole filed book. Changes are in shares held, against the Q4 2025 filing.
| Company | Ticker | Value | % of book | vs Q4 2025 |
|---|---|---|---|---|
| NVIDIA CORPORATION | NVDA | $830.38M | 8.5% | -4% shares |
| MICROSOFT CORP | MSFT | $719.01M | 7.3% | unchanged |
| AMAZON COM INC | AMZN | $542.11M | 5.5% | unchanged |
| ALPHABET INC | GOOG | $462.31M | 4.7% | -5% shares |
| GRACO INC | GGG | $323.00M | 3.3% | -2% shares |
| JPMORGAN CHASE & CO | JPM | $310.10M | 3.2% | -17% shares |
| APPLE INC | AAPL | $306.68M | 3.1% | unchanged |
| ELI LILLY & CO | LLY | $300.13M | 3.1% | -6% shares |
| VISA INC | V | $254.16M | 2.6% | +5% shares |
| TORO CO | TTC | $254.06M | 2.6% | -21% shares |
| LITTELFUSE INC | LFUS | $245.93M | 2.5% | -7% shares |
| NVENT ELEC PLC | $244.42M | 2.5% | -2% shares | |
| MOTOROLA SOLUTIONS INC | MSI | $234.66M | 2.4% | +3% shares |
| WEC ENERGY GROUP INC | WEC | $221.20M | 2.3% | unchanged |
| ALLIANT ENERGY CORP | LNT | $207.32M | 2.1% | -2% shares |
| ECOLAB INC | ECL | $202.66M | 2.1% | unchanged |
| UNITEDHEALTH GROUP INC | UNH | $200.53M | 2.0% | -11% shares |
| META PLATFORMS INC | META | $185.73M | 1.9% | +3% shares |
| FASTENAL CO | FAST | $182.00M | 1.9% | -16% shares |
| VERIZON COMMUNICATIONS INC | VZ | $166.43M | 1.7% | unchanged |
| TAIWAN SEMICONDUCTOR MANUFAC | TSM | $164.33M | 1.7% | unchanged |
| ENTEGRIS INC | ENTG | $157.47M | 1.6% | unchanged |
| FULLER H B CO | FUL | $145.66M | 1.5% | -2% shares |
| BIO-TECHNE CORP | TECH | $143.73M | 1.5% | unchanged |
| JOHNSON & JOHNSON | JNJ | $141.19M | 1.4% | -28% shares |
What changed since Q4 2025
Against the Q4 2025 filing, Mairs & Power opened 22 new positions, added to 48, trimmed 85, left 90 unchanged and exited 20. Every position is compared, matched on its CUSIP; a change of 2% or less in shares counts as unchanged.
New positions
and 14 more
Exited
- 62Cwas $59.74M
- INSPwas $5.31M
- MGPIwas $4.21M
- CLEARWATER ANALYTICS HLDGS Iwas $2.23M
- THRMwas $1.93M
- EXKwas $1.75M
- XLIwas $1.63M
- XLPwas $1.56M
and 12 more
Other quarters
Source: SEC Form 13F-HR, accession 0001172661-26-001819, filed by MAIRS & POWER INC. Values are as filed and cover US-listed positions only; a 13F does not show short positions or holdings outside the US. A 13F may be filed up to 45 days after the quarter ends, so the fund may have traded since. Educational information, not financial advice.