Blair William & Co holds a diversified book of 1922 stocks worth $34.9B as of Q1 2026 (disclosed May 8, 2026, a ~45-day 13F lag). This quarter they opened AstraZeneca PLC and trimmed Apple Inc. Their largest long position is Apple Inc at 4% of the equity book.
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curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/funds/902367/holdings"
Use Arkolith to show BLAIR WILLIAM & CO/IL'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.
83% 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 | Apple Inc COM | $1.5B | 5.93M | 4.3% | ▼−0.3% Reduced · −19K sh | |
| 2 | Microsoft Corp COM | $1.3B | 3.50M | 3.7% | ▼−2.1% Reduced · −76K sh | |
| 3 | Amazon Com Inc COM | $1.3B | 6.06M | 3.6% | ▼−0.1% Reduced · −6K sh | |
| 4 | Nvidia Corporation COM | $946.6M | 5.43M | 2.7% | ▼−1.2% Reduced · −66K sh | |
| 5 | Alphabet Inc CAP STK CL C | $870.8M | 3.04M | 2.5% | ▼−2.7% Reduced · −83K sh | |
| 6 | Alphabet Inc CAP STK CL A | $700.5M | 2.44M | 2.0% | ▼−2.3% Reduced · −57K sh | |
| 7 | JPMorgan Chase & Co COM | $678.7M | 2.31M | 1.9% | ▼−0.1% Reduced · −3K sh | |
| 8 | Ge Vernova Inc COM | $580.1M | 664.6K | 1.7% | ▲+1.9% Added · +12K sh | |
| 9 | Visa Inc COM CL A | $557.5M | 1.84M | 1.6% | ▼−4.4% Reduced · −85K sh | |
| 10 | State STR SPDR S&P 500 ETF T TR UNIT | $549.7M | 845.3K | 1.6% | ▼−1.4% Reduced · −13K sh | |
| 11 | Idexx Labs Inc COM | $531.7M | 946.3K | 1.5% | ▼−5.5% Reduced · −55K sh | |
| 12 | Costco Wholesale Corporation COM | $519.4M | 521.3K | 1.5% | ▲~0% Added · +95 sh | |
| 13 | Mastercard Incorporated CL A | $461.4M | 923.4K | 1.3% | ▼−3.3% Reduced · −32K sh | |
| 14 | Meta Platforms Inc CL A | $412.9M | 721.7K | 1.2% | ▼−2.0% Reduced · −14K sh | |
| 15 | Fastenal Co COM | $342.1M | 7.37M | 1.0% | ▲+5.1% Added · +359K sh | |
| 16 | Invesco Exchange Traded FD T S&P500 EQL WGT | $322.5M | 1.68M | 0.9% | ▲+206% Added · +1.1M sh | |
| 17 | Amphenol Corp CL A | $318.4M | 2.52M | 0.9% | ▼−5.0% Reduced · −134K sh | |
| 18 | Ishares TR CORE S&P500 ETF | $317.4M | 485.8K | 0.9% | ▼−0.5% Reduced · −3K sh | |
| 19 | Vanguard Intl Equity Index F ALLWRLD EX US | $313.1M | 4.17M | 0.9% | ▲+54% Added · +1.5M sh | |
| 20 | Eli Lilly & Co COM | $298.0M | 324.0K | 0.9% | ▼−0.2% Reduced · −778 sh | |
| 21 | Walmart Inc COM | $295.1M | 2.37M | 0.8% | ▼−1.6% Reduced · −38K sh | |
| 22 | BWX Technologies Inc COM | $294.1M | 1.44M | 0.8% | ▼−0.1% Reduced · −2K sh | |
| 23 | Abbvie Inc COM | $290.2M | 1.33M | 0.8% | ▼−0.3% Reduced · −3K sh | |
| 24 | Broadcom Inc COM | $284.2M | 918.3K | 0.8% | ▲+2.4% Added · +22K sh | |
| 25 | Stryker Corporation COM | $278.5M | 847.7K | 0.8% | ▲+0.3% Added · +3K sh | |
| 26 | Intercontinental Exchange In COM | $250.6M | 1.59M | 0.7% | ▼−5.7% Reduced · −97K sh | |
| 27 | Home Depot Inc COM | $250.4M | 761.4K | 0.7% | ▲+0.7% Added · +5K sh | |
| 28 | Vanguard Tax-Managed FDS VAN FTSE DEV MKT | $247.5M | 3.86M | 0.7% | ▲+23% Added · +714K sh | |
| 29 | Danaher Corp Del COM | $245.9M | 1.30M | 0.7% | ▼−5.5% Reduced · −76K sh | |
| 30 | Progressive Corp COM | $241.8M | 1.22M | 0.7% | ▼−13% Reduced · −187K sh | |
| 31 | Vanguard Index FDS S&P 500 ETF SHS | $237.5M | 397.4K | 0.7% | ▲+5.9% Added · +22K sh | |
| 32 | Berkshire Hathaway Inc Del CL B NEW | $237.4M | 495.3K | 0.7% | ▲+11% Added · +48K sh | |
| 33 | Uber Technologies Inc COM | $237.3M | 3.30M | 0.7% | ▼−20% Reduced · −808K sh | |
| 34 | Johnson & Johnson COM | $233.6M | 955.6K | 0.7% | ▲+0.6% Added · +6K sh | |
| 35 | Ecolab Inc COM | $230.5M | 866.4K | 0.7% | ▲+1.0% Added · +9K sh | |
| 36 | Vanguard Index FDS VALUE ETF | $228.8M | 1.17M | 0.7% | ▲+30% Added · +268K sh | |
| 37 | Watsco Inc COM | $212.0M | 582.7K | 0.6% | ▼−14% Reduced · −93K sh | |
| 38 | American Express Co COM | $209.9M | 693.8K | 0.6% | ▼−0.9% Reduced · −6K sh | |
| 39 | Palo Alto Networks Inc COM | $209.2M | 1.30M | 0.6% | ▲+4.3% Added · +54K sh | |
| 40 | Intuitive Surgical Inc COM NEW | $196.0M | 425.2K | 0.6% | ▼−3.2% Reduced · −14K sh | |
| 41 | Transdigm Group Inc COM | $192.7M | 166.2K | 0.6% | ▼−2.3% Reduced · −4K sh | |
| 42 | Servicenow Inc COM | $188.3M | 1.80M | 0.5% | ▼−19% Reduced · −414K sh | |
| 43 | Veeva Sys Inc CL A COM | $187.5M | 1.07M | 0.5% | ▼−13% Reduced · −161K sh | |
| 44 | Boeing Co COM | $183.5M | 922.1K | 0.5% | ▲+36% Added · +244K sh | |
| 45 | Invesco QQQ TR UNIT SER 1 | $179.5M | 311.0K | 0.5% | ▲+11% Added · +30K sh | |
| 46 | Everpure Inc CL A | $172.3M | 2.92M | 0.5% | ▼−4.4% Reduced · −136K sh | |
| 47 | Netflix Inc. COM | $169.6M | 1.76M | 0.5% | ▲+18% Added · +268K sh | |
| 48 | SPDR Gold TR GOLD SHS | $166.4M | 386.7K | 0.5% | ▲+52% Added · +132K sh | |
| 49 | Cintas Corp COM | $164.7M | 973.6K | 0.5% | ▼−2.1% Reduced · −21K sh | |
| 50 | Exxon Mobil Corp COM | $160.6M | 946.4K | 0.5% | ▼−2.2% Reduced · −22K 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 8, 2026 | 1,922 | $34.9B | 13F-HR |
| Q4 2025 | Dec 31, 2025 | Feb 17, 2026 | 1,920 | $37.3B | 13F-HR |
| Q3 2025 | Sep 30, 2025 | Nov 12, 2025 | 1,844 | $37.6B | 13F-HR |
| Q2 2025 | Jun 30, 2025 | Jul 24, 2025 | 1,824 | $36.0B | 13F-HR |
| Q1 2025 | Mar 31, 2025 | May 9, 2025 | 1,801 | $33.2B | 13F-HR |
| Q4 2024 | Dec 31, 2024 | Feb 12, 2025 | 1,816 | $34.4B | 13F-HR |
| Q3 2024 | Sep 30, 2024 | Nov 12, 2024 | 1,821 | $34.1B | 13F-HR |
| Q2 2024 | Jun 30, 2024 | Aug 12, 2024 | 1,822 | $32.4B | 13F-HR |
| Q1 2024 | Mar 31, 2024 | May 9, 2024 | 1,787 | $31.8B | 13F-HR |
| Q4 2023 | Dec 31, 2023 | Feb 12, 2024 | 1,785 | $29.3B | 13F-HR |
| Q3 2023 | Sep 30, 2023 | Nov 9, 2023 | 1,791 | $26.1B | 13F-HR |
| Q2 2023 | Jun 30, 2023 | Aug 11, 2023 | 1,809 | $27.3B | 13F-HR |
| Q1 2023 | Mar 31, 2023 | May 12, 2023 | 1,801 | $25.0B | 13F-HR |
| Q4 2022 | Dec 31, 2022 | Feb 10, 2023 | 1,814 | $23.0B | 13F-HR |
| Q3 2022 | Sep 30, 2022 | Nov 9, 2022 | 1,823 | $21.8B | 13F-HR |
| Q2 2022 | Jun 30, 2022 | Aug 10, 2022 | 1,863 | $22.5B | 13F-HR |
| Q1 2022 | Mar 31, 2022 | May 13, 2022 | 1,910 | $28.5B | 13F-HR |
| Q4 2021 | Dec 31, 2021 | Feb 14, 2022 | 1,963 | $31.9B | 13F-HR |
| Q3 2021 | Sep 30, 2021 | Nov 12, 2021 | 1,879 | $29.4B | 13F-HR |
| Q2 2021 | Jun 30, 2021 | Aug 12, 2021 | 1,888 | $28.9B | 13F-HR |
| Q1 2021 | Mar 31, 2021 | May 13, 2021 | 1,856 | $26.5B | 13F-HR |
| Q4 2020 | Dec 31, 2020 | Feb 9, 2021 | 1,828 | $27.3B | 13F-HR |
| Q3 2020 | Sep 30, 2020 | Nov 6, 2020 | 1,720 | $23.6B | 13F-HR |
| Q2 2020 | Jun 30, 2020 | Aug 12, 2020 | 1,681 | $21.0B | 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.