Blair William & Co holds a diversified book of 1998 stocks worth $38.4B as of Q2 2026 (disclosed Aug 11, 2026, a ~42-day 13F lag). This quarter they opened Honeywell Intl Inc and trimmed Apple Inc. Their largest long position is Apple Inc at 4% of the equity book.
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.
81% 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
Other tracked managers holding the same core names as Blair William & Co
| Manager / fund | Shared names | Their $ in those |
|---|---|---|
| BlackRock, Inc. | 80 / 80 | $2.5T |
| FMR LLC | 80 / 80 | $858.3B |
| MORGAN STANLEY | 80 / 80 | $686.5B |
| JPMORGAN CHASE & CO | 80 / 80 | $603.8B |
| BANK OF AMERICA CORP /DE/ | 80 / 80 | $498.6B |
| GOLDMAN SACHS GROUP INC | 80 / 80 | $304.0B |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AME | 80 / 80 | $240.0B |
| Bank of New York Mellon Corp | 80 / 80 | $227.1B |
Ranked by the share of each fund's own book sitting in the names it shares with Blair William & Co: only funds sharing at least a tenth of the book qualify. Index giants, bank custody books and market makers are excluded. They hold everything, so their overlap says nothing.
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 | $1.7B | 5.73M | 4.3% | ▼−3.4% Reduced · −199K sh | |
| 2 | Amazon Com Inc COM | $1.4B | 5.88M | 3.6% | ▼−3.0% Reduced · −183K sh | |
| 3 | Microsoft Corp COM | $1.3B | 3.44M | 3.3% | ▼−1.6% Reduced · −56K sh | |
| 4 | Nvidia Corporation COM | $1.1B | 5.37M | 2.8% | ▼−1.0% Reduced · −53K sh | |
| 5 | Alphabet Inc CAP STK CL C | $1.0B | 2.95M | 2.7% | ▼−2.7% Reduced · −82K sh | |
| 6 | Alphabet Inc CAP STK CL A | $858.6M | 2.40M | 2.2% | ▼−1.4% Reduced · −33K sh | |
| 7 | Ge Vernova Inc COM | $775.0M | 659.7K | 2.0% | ▼−0.7% Reduced · −5K sh | |
| 8 | JPMorgan Chase & Co COM | $743.2M | 2.27M | 1.9% | ▼−1.6% Reduced · −37K sh | |
| 9 | State STR SPDR S&P 500 ETF T TR UNIT | $633.3M | 848.0K | 1.6% | ▲+0.3% Added · +3K sh | |
| 10 | Visa Inc COM CL A | $631.8M | 1.84M | 1.6% | ▼−0.2% Reduced · −3K sh | |
| 11 | Costco Wholesale Corporation COM | $490.8M | 524.7K | 1.3% | ▲+0.7% Added · +3K sh | |
| 12 | Idexx Labs Inc COM | $483.6M | 918.6K | 1.3% | ▼−2.9% Reduced · −28K sh | |
| 13 | Amphenol Corp CL A | $441.6M | 2.50M | 1.2% | ▼−0.6% Reduced · −16K sh | |
| 14 | Mastercard Incorporated CL A | $432.6M | 842.4K | 1.1% | ▼−8.8% Reduced · −81K sh | |
| 15 | Invesco Exchange Traded FD T S&P500 EQL WGT | $421.8M | 1.98M | 1.1% | ▲+18% Added · +302K sh | |
| 16 | Palo Alto Networks Inc COM | $418.3M | 1.23M | 1.1% | ▼−6.0% Reduced · −78K sh | |
| 17 | Eli Lilly & Co COM | $416.3M | 347.1K | 1.1% | ▲+7.1% Added · +23K sh | |
| 18 | Meta Platforms Inc CL A | $377.9M | 670.9K | 1.0% | ▼−7.0% Reduced · −51K sh | |
| 19 | Vanguard Intl Equity Index F ALLWRLD EX US | $375.1M | 4.48M | 1.0% | ▲+7.5% Added · +311K sh | |
| 20 | Micron Technology Inc COM | $364.6M | 315.9K | 0.9% | ▼−4.9% Reduced · −16K sh | |
| 21 | Ishares TR CORE S&P500 ETF | $363.0M | 484.7K | 0.9% | ▼−0.2% Reduced · −1K sh | |
| 22 | Fastenal Co COM | $355.8M | 7.41M | 0.9% | ▲+0.5% Added · +33K sh | |
| 23 | Broadcom Inc COM | $351.2M | 929.7K | 0.9% | ▲+1.2% Added · +11K sh | |
| 24 | Abbvie Inc COM | $324.1M | 1.29M | 0.8% | ▼−3.5% Reduced · −46K sh | |
| 25 | Vanguard Tax-Managed FDS VAN FTSE DEV MKT | $305.7M | 4.29M | 0.8% | ▲+11% Added · +429K sh | |
| 26 | BWX Technologies Inc COM | $303.0M | 1.56M | 0.8% | ▲+8.2% Added · +118K sh | |
| 27 | Vanguard Index FDS S&P 500 ETF SHS | $288.0M | 419.4K | 0.8% | ▲+5.5% Added · +22K sh | |
| 28 | Arista Networks Inc COM SHS | $272.6M | 1.60M | 0.7% | ▲+39% Added · +453K sh | |
| 29 | Vanguard Index FDS VALUE ETF | $268.6M | 1.23M | 0.7% | ▲+5.7% Added · +67K sh | |
| 30 | Invesco QQQ TR UNIT SER 1 | $264.5M | 359.2K | 0.7% | ▲+15% Added · +48K sh | |
| 31 | Walmart Inc COM | $257.2M | 2.27M | 0.7% | ▼−4.3% Reduced · −103K sh | |
| 32 | Home Depot Inc COM | $246.0M | 697.6K | 0.6% | ▼−8.4% Reduced · −64K sh | |
| 33 | Johnson & Johnson COM | $242.9M | 956.3K | 0.6% | ▲+0.1% Added · +630 sh | |
| 34 | Berkshire Hathaway Inc Del CL B NEW | $242.0M | 483.6K | 0.6% | ▼−2.4% Reduced · −12K sh | |
| 35 | Everpure Inc CL A | $240.2M | 3.05M | 0.6% | ▲+4.5% Added · +130K sh | |
| 36 | Ecolab Inc COM | $238.0M | 854.3K | 0.6% | ▼−1.4% Reduced · −12K sh | |
| 37 | Watsco Inc COM | $235.0M | 564.0K | 0.6% | ▼−3.2% Reduced · −19K sh | |
| 38 | American Express Co COM | $230.1M | 680.3K | 0.6% | ▼−1.9% Reduced · −13K sh | |
| 39 | Progressive Corp COM | $225.9M | 1.03M | 0.6% | ▼−15% Reduced · −186K sh | |
| 40 | Servicenow Inc COM | $222.4M | 2.24M | 0.6% | ▲+24% Added · +439K sh | |
| 41 | Transdigm Group Inc COM | $219.7M | 165.0K | 0.6% | ▼−0.8% Reduced · −1K sh | |
| 42 | Stryker Corporation COM | $215.5M | 684.4K | 0.6% | ▼−19% Reduced · −163K sh | |
| 43 | Ishares TR RUSSELL 2000 ETF | $210.6M | 701.1K | 0.5% | ▲+12% Added · +73K sh | |
| 44 | Crowdstrike Hldgs Inc CL A | $207.8M | 272.2K | 0.5% | ▲+7.9% Added · +20K sh | |
| 45 | Uber Technologies Inc COM | $201.7M | 2.79M | 0.5% | ▼−15% Reduced · −505K sh | |
| 46 | Vanguard Index FDS TOTAL STK MKT | $195.6M | 528.5K | 0.5% | ▲+42% Added · +156K sh | |
| 47 | Aaon Inc COM PAR $0.004 | $194.5M | 1.53M | 0.5% | ▼−5.5% Reduced · −89K sh | |
| 48 | Boeing Co COM | $190.1M | 878.4K | 0.5% | ▼−4.7% Reduced · −44K sh | |
| 49 | Danaher Corp Del COM | $185.0M | 971.1K | 0.5% | ▼−25% Reduced · −326K sh | |
| 50 | Cintas Corp COM | $180.9M | 1.06M | 0.5% | ▲+9.2% Added · +90K sh |
The public view is the crawlable proof. The same sourced dataset is available through REST and MCP for agents, research scripts, and back-office tools.
This fund page is the Follow view. The Build view lets your agent pull holdings, quarter changes, overlap, and source filings through API or MCP.
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.
As-of date vs the date the SEC received each filing
| Quarter | As of | Filed | Positions | Value | Form |
|---|---|---|---|---|---|
| Q2 2026 | Jun 30, 2026 | Aug 11, 2026 | 2,054 | $38.4B | 13F-HR |
| 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 |
Holdings from SEC EDGAR 13F-HR filings, updated quarterly, filed up to 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.