Mairs & Power Inc holds a diversified book of 245 stocks worth $9.8B as of Q1 2026 (disclosed May 14, 2026, a ~45-day 13F lag). This quarter they opened Piper Sandler Cos and trimmed Nvidia Corp. Their largest long position is Nvidia Corp at 8% of the equity book.
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curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/funds/1070134/holdings"
Use Arkolith to show MAIRS & POWER INC's latest holdings, largest changes, and filing provenance.
Top-heavy: diversified book
Share of the disclosed book in its largest positions. A higher top-5 share means a more concentrated, higher-conviction portfolio.
99% mapped to company sectors
Direct operating-company sectors from our SIC-based security master. ETF/fund and unclassified holdings stay visible separately; this is not ETF look-through exposure.
Estimated $ traded · quarter-end prices, no cost basis
Bars show each stock's share of the portfolio. Click a row for its position history.
| # | Security | Value | Shares | % Port | Last move | History |
|---|---|---|---|---|---|---|
| 1 | Nvidia Corporation COM | $830.4M | 4.76M | 8.5% | ▼−3.8% Reduced · −188K sh | |
| 2 | Microsoft Corp COM | $719.0M | 1.94M | 7.3% | ▲+1.5% Added · +29K sh | |
| 3 | Amazon Com Inc COM | $542.1M | 2.60M | 5.5% | ▲+0.4% Added · +10K sh | |
| 4 | Alphabet Inc CAP STK CL C | $462.3M | 1.61M | 4.7% | ▼−5.1% Reduced · −86K sh | |
| 5 | Graco Inc COM | $323.0M | 3.82M | 3.3% | ▼−2.3% Reduced · −90K sh | |
| 6 | JPMorgan Chase & Co COM | $310.1M | 1.05M | 3.2% | ▼−17% Reduced · −222K sh | |
| 7 | Apple Inc COM | $306.7M | 1.21M | 3.1% | ▼−0.7% Reduced · −9K sh | |
| 8 | Eli Lilly & Co COM | $300.1M | 326.3K | 3.1% | ▼−5.5% Reduced · −19K sh | |
| 9 | Visa Inc COM CL A | $254.2M | 840.9K | 2.6% | ▲+4.8% Added · +38K sh | |
| 10 | Toro Co COM | $254.1M | 2.72M | 2.6% | ▼−21% Reduced · −704K sh | |
| 11 | Littelfuse Inc COM | $245.9M | 724.7K | 2.5% | ▼−7.0% Reduced · −54K sh | |
| 12 | Nvent Elec PLC SHS | $244.4M | 2.07M | 2.5% | ▼−2.1% Reduced · −45K sh | |
| 13 | Motorola Solutions Inc COM NEW | $234.7M | 540.7K | 2.4% | ▲+3.0% Added · +16K sh | |
| 14 | Wec Energy Group Inc COM | $221.2M | 1.91M | 2.3% | ▲+0.1% Added · +2K sh | |
| 15 | Alliant Energy Corp COM | $207.3M | 2.89M | 2.1% | ▼−2.3% Reduced · −68K sh | |
| 16 | Ecolab Inc COM | $202.7M | 761.8K | 2.1% | ▼−1.1% Reduced · −9K sh | |
| 17 | Unitedhealth Group Inc COM | $200.5M | 741.1K | 2.0% | ▼−11% Reduced · −89K sh | |
| 18 | Meta Platforms Inc CL A | $185.7M | 324.6K | 1.9% | ▲+2.5% Added · +8K sh | |
| 19 | Fastenal Co COM | $182.0M | 3.92M | 1.9% | ▼−16% Reduced · −745K sh | |
| 20 | Verizon Communications Inc COM | $166.4M | 3.32M | 1.7% | ▼−1.7% Reduced · −58K sh | |
| 21 | Taiwan Semiconductor Manufac SPONSORED ADS | $164.3M | 486.3K | 1.7% | ▼−0.1% Reduced · −294 sh | |
| 22 | Entegris Inc COM | $157.5M | 1.34M | 1.6% | ▼−0.4% Reduced · −6K sh | |
| 23 | Fuller H B Co COM | $145.7M | 2.36M | 1.5% | ▼−2.0% Reduced · −49K sh | |
| 24 | Bio-Techne Corp COM | $143.7M | 2.75M | 1.5% | ▼−0.6% Reduced · −17K sh | |
| 25 | Johnson & Johnson COM | $141.2M | 577.6K | 1.4% | ▼−28% Reduced · −227K sh | |
| 26 | C H Robinson Worldwide In COM NEW | $140.9M | 848.2K | 1.4% | ▼−1.6% Reduced · −14K sh | |
| 27 | Sherwin Williams Co COM | $140.3M | 437.8K | 1.4% | ▼−6.8% Reduced · −32K sh | |
| 28 | Fiserv Inc COM | $120.1M | 2.15M | 1.2% | ▲+31% Added · +510K sh | |
| 29 | Wells Fargo & Co COM | $108.7M | 1.37M | 1.1% | ▼−21% Reduced · −363K sh | |
| 30 | Rockwell Automation Inc COM | $101.8M | 283.6K | 1.0% | ▼−14% Reduced · −47K sh | |
| 31 | Waste Mgmt Inc Del COM | $91.5M | 398.2K | 0.9% | ▲398× Added · +397K sh | |
| 32 | Ameriprise Finl Inc COM | $87.6M | 197.0K | 0.9% | ▲+362% Added · +154K sh | |
| 33 | Palo Alto Networks Inc COM | $85.4M | 532.7K | 0.9% | ▲+141% Added · +312K sh | |
| 34 | Hormel Foods Corp COM | $77.4M | 3.42M | 0.8% | ▼−9.8% Reduced · −372K sh | |
| 35 | Abbott Laboratories COM | $74.1M | 721.8K | 0.8% | ▲+1.9% Added · +14K sh | |
| 36 | Caseys Gen Stores Inc COM | $69.8M | 95.9K | 0.7% | ▼−7.6% Reduced · −8K sh | |
| 37 | Qualcomm Inc COM | $61.6M | 478.1K | 0.6% | ▼−13% Reduced · −72K sh | |
| 38 | Cognex Corp COM | $60.0M | 1.22M | 0.6% | ▲+4.5% Added · +52K sh | |
| 39 | Tennant Co COM | $53.4M | 803.5K | 0.5% | ▼−25% Reduced · −268K sh | |
| 40 | 3M Co COM | $51.1M | 351.8K | 0.5% | ▲+0.8% Added · +3K sh | |
| 41 | Home Depot Inc COM | $50.5M | 153.4K | 0.5% | ▼−2.3% Reduced · −4K sh | |
| 42 | Honeywell Intl Inc COM | $47.1M | 208.4K | 0.5% | ▼−11% Reduced · −26K sh | |
| 43 | Intuitive Surgical Inc COM NEW | $46.0M | 99.9K | 0.5% | ▲+60% Added · +38K sh | |
| 44 | American Express Co COM | $45.0M | 148.8K | 0.5% | ▼−6.7% Reduced · −11K sh | |
| 45 | Texas Instrs Inc COM | $44.9M | 231.2K | 0.5% | ▼−1.8% Reduced · −4K sh | |
| 46 | Idacorp Inc COM | $43.1M | 301.4K | 0.4% | ▼−0.4% Reduced · −1K sh | |
| 47 | Workiva Inc COM CL A | $42.7M | 715.6K | 0.4% | ▼−1.7% Reduced · −12K sh | |
| 48 | Donaldson Inc COM | $42.4M | 499.4K | 0.4% | ▼−11% Reduced · −61K sh | |
| 49 | Piper Sandler Companies COM NEW | $41.8M | 546.1K | 0.4% | ▲New New position | |
| 50 | Travelers Companies Inc COM | $41.5M | 142.4K | 0.4% | ▲+25% Added · +29K sh |
As-of date vs the date the SEC received each filing
| Quarter | As of | Filed | Positions | Value | Form |
|---|---|---|---|---|---|
| Q1 2026 | Mar 31, 2026 | May 14, 2026 | 245 | $9.8B | 13F-HR |
| Q4 2025 | Dec 31, 2025 | Feb 17, 2026 | 243 | $10.4B | 13F-HR |
| Q3 2025 | Sep 30, 2025 | Nov 14, 2025 | 248 | $10.6B | 13F-HR |
| Q2 2025 | Jun 30, 2025 | Aug 14, 2025 | 235 | $10.1B | 13F-HR |
| Q1 2025 | Mar 31, 2025 | May 15, 2025 | 221 | $9.6B | 13F-HR |
| Q4 2024 | Dec 31, 2024 | Feb 14, 2025 | 229 | $10.3B | 13F-HR |
| Q3 2024 | Sep 30, 2024 | Nov 14, 2024 | 228 | $10.6B | 13F-HR |
| Q2 2024 | Jun 30, 2024 | Aug 14, 2024 | 222 | $10.3B | 13F-HR |
| Q1 2024 | Mar 31, 2024 | May 15, 2024 | 226 | $10.3B | 13F-HR |
| Q4 2023 | Dec 31, 2023 | Feb 14, 2024 | 231 | $9.5B | 13F-HR |
| Q3 2023 | Sep 30, 2023 | Nov 14, 2023 | 214 | $8.5B | 13F-HR |
| Q2 2023 | Jun 30, 2023 | Aug 14, 2023 | 226 | $9.2B | 13F-HR |
| Q1 2023 | Mar 31, 2023 | May 15, 2023 | 236 | $8.7B | 13F-HR |
| Q4 2022 | Dec 31, 2022 | Feb 14, 2023 | 227 | $8.3B | 13F-HR |
| Q3 2022 | Sep 30, 2022 | Nov 14, 2022 | 221 | $7.9B | 13F-HR |
| Q2 2022 | Jun 30, 2022 | Aug 15, 2022 | 202 | $8.3B | 13F-HR |
| Q1 2022 | Mar 31, 2022 | May 16, 2022 | 216 | $9.9B | 13F-HR |
| Q4 2021 | Dec 31, 2021 | Feb 14, 2022 | 218 | $10.8B | 13F-HR |
| Q3 2021 | Sep 30, 2021 | Nov 15, 2021 | 210 | $10.0B | 13F-HR |
| Q2 2021 | Jun 30, 2021 | Aug 16, 2021 | 212 | $10.1B | 13F-HR |
| Q1 2021 | Mar 31, 2021 | May 14, 2021 | 216 | $9.5B | 13F-HR |
| Q4 2020 | Dec 31, 2020 | Feb 16, 2021 | 213 | $9.0B | 13F-HR |
| Q3 2020 | Sep 30, 2020 | Nov 16, 2020 | 199 | $8.0B | 13F-HR |
| Q2 2020 | Jun 30, 2020 | Aug 14, 2020 | 201 | $7.7B | 13F-HR |
Holdings from SEC EDGAR 13F-HR filings, updated quarterly ~45 days after quarter-end. Public domain. The book and weighting are long equity only; disclosed put/call options are listed separately and excluded from those totals. Price-derived performance is withheld until the price-source policy and freshness gate are green.