N-PORT filing recap · September 2025

What did Mairs & Power Fund buy in September 2025?

Reported stock-position changes between this filing and the previous one. These are Mairs & Power Fund's own holdings, not the firm's.

Stock value

$5.55B

Positions

Estimated turnover

5.5%

Turnover is a proxy: verified trade-origin share changes valued at period-end and divided by average reported stock value. SEC holdings reports do not disclose execution dates or prices. Corporate actions and unreconciled activity are excluded.

Period in review

Mairs & Power Fund opened new positions in Cognex Corporation and Palo Alto Networks, while exiting Abbott Laboratories and Donaldson Company entirely. The fund trimmed Microsoft and Nvidia slightly, and reduced JPMorgan Chase, Fastenal, and Piper Sandler. It added to Meta Platforms, WEC Energy Group, Taiwan Semiconductor Manufacturing, Entegris, and Salesforce, and substantially cut Qualcomm.

New positions

CGNXCognex Corporation$14.72Mreported value+325.0K shares PANWPalo Alto Networks, Inc$8.14Mreported value+40.0K shares

Increased positions

METAMeta Platforms, Inc.$146.88Mreported value+25.0K shares+14.3%RHHBYRoche Holding AG$141.84Mreported value+200.0K shares+6.3%WECWec Energy Group, Inc.$141.00Mreported value+125.0K shares+11.3%TSMTaiwan Semiconductor Manufacturing$106.69Mreported value+40.0K shares

Reduced positions

MSFTMicrosoft Corporation$637.00Mreported value-85.1K shares-6.5%NVDANvidia Corp$619.97Mreported value-62.5K shares-1.8%JPMJPMorgan Chase & Co$300.60Mreported value-130.0K shares-12.0%FASTFastenal Co$116.89Mreported value-540.5K shares

Exited positions

ABTAbbott Laboratories$16.10Mprior reported value-118.4K shares-100.0%DCIDonaldson Company, Inc.$8.57Mprior reported value-123.6K shares-100.0%