BLAIR WILLIAM & CO/IL
CIK: 0000902367Latest portfolio: $37.3B · Q4 2025
Holdings
1,867
Total Value
$37.3B
New Positions
123
Closed Positions
97
Top Holdings
View All 1,867 Holdings →| # | Stock | Shares | Value | % Portfolio | Change | Type |
|---|---|---|---|---|---|---|
| 1 | MSFTMICROSOFT CORP | 3,574,568 | $1.7B | 4.64% | -32,538 | |
| 2 | AAPLAPPLE INC | 5,949,948 | $1.6B | 4.34% | -42,847 | |
| 3 | AMZNAMAZON COM INC | 6,064,424 | $1.4B | 3.75% | +58K | |
| 4 | NVDANVIDIA CORPORATION | 5,494,350 | $1.0B | 2.75% | -150,762 | |
| 5 | GOOGALPHABET INC | 3,118,759 | $978.0M | 2.62% | -27,196 | |
| 6 | GOOGLALPHABET INC | 2,493,580 | $779.0M | 2.09% | -32,394 | |
| 7 | JPMJPMORGAN CHASE & CO. | 2,309,809 | $744.0M | 2.00% | +3K | |
| 8 | IDXXIDEXX LABS INC | 1,001,375 | $676.0M | 1.81% | -30,411 | |
| 9 | VVISA INC | 1,929,237 | $676.0M | 1.81% | -32,916 | |
| 10 | SPYSPDR S&P 500 ETF TR | 857,803 | $584.0M | 1.57% | -1,541 | |
| 11 | MAMASTERCARD INCORPORATED | 955,188 | $545.0M | 1.46% | -21,409 | |
| 12 | METAMETA PLATFORMS INC | 736,202 | $485.0M | 1.30% | +57K | |
| 13 | COSTCOSTCO WHSL CORP NEW | 521,182 | $448.0M | 1.20% | -30,376 | |
| 14 | GEVGE VERNOVA INC | 652,306 | $426.0M | 1.14% | +24K | |
| 15 | APHAMPHENOL CORP NEW | 2,653,891 | $358.0M | 0.96% | -97,623 | |
| 16 | LLYELI LILLY & CO | 324,796 | $349.0M | 0.94% | +25K | |
| 17 | NOWSERVICENOW INC | 2,214,840 | $338.0M | 0.91% | +1.8M | |
| 18 | UBERUBER TECHNOLOGIES INC | 4,107,558 | $335.0M | 0.90% | -139,935 | |
| 19 | IVVISHARES TR | 488,420 | $334.0M | 0.90% | +42K | |
| 20 | PGRPROGRESSIVE CORP | 1,407,032 | $320.0M | 0.86% | -32,124 | |
| 21 | DHRDANAHER CORPORATION | 1,372,624 | $314.0M | 0.84% | +7K | |
| 22 | AVGOBROADCOM INC | 896,446 | $309.0M | 0.83% | +7K | |
| 23 | ABBVABBVIE INC | 1,337,461 | $305.0M | 0.82% | +74K | |
| 24 | SYKSTRYKER CORPORATION | 844,899 | $296.0M | 0.79% | -74,606 | |
| 25 | FASTFASTENAL CO | 7,014,666 | $281.0M | 0.75% | +49K |
Quarterly Changes
New Positions
Increased Positions
Sector Breakdown
TechnologyNaN% ($InfinityT)
Financial ServicesNaN% ($InfinityT)
HealthcareNaN% ($InfinityT)
IndustrialsNaN% ($InfinityT)
UnknownNaN% ($InfinityT)
Consumer Cyclical0.0% ($InfinityT)
Energy0.0% ($1.1600010100045001e+154T)
Consumer Defensive0.0% ($4.48000268000124e+131T)
Basic Materials0.0% ($2.250009900026e+127T)
Communication Services0.0% ($9.780007790004848e+112T)
Utilities0.0% ($4.260003200022e+107T)
Real Estate0.0% ($1.36000119000116e+107T)
Filing History
| Quarter | Filing Date | Portfolio Value | Holdings |
|---|---|---|---|
| Q4 2025 | Feb 17, 2026 | $37.3B | 1,920 |
| Q3 2025 | Nov 12, 2025 | $37.6T | 1,844 |
| Q2 2025 | Jul 24, 2025 | $36.0T | 1,824 |
| Q1 2025 | May 9, 2025 | $33.2T | 1,801 |
| Q4 2024 | Feb 12, 2025 | $34.4T | 1,816 |
| Q3 2024 | Nov 12, 2024 | $34050.2T | 1,821 |
| Q2 2024 | Aug 12, 2024 | $32421.1T | 1,822 |
| Q1 2024 | May 9, 2024 | $31838.5T | 1,787 |
| Q4 2023 | Feb 12, 2024 | $29346.8T | 1,785 |
| Q3 2023 | Nov 9, 2023 | $26075.5T | 1,791 |
| Q2 2023 | Aug 11, 2023 | $27298.2T | 1,809 |
| Q1 2023 | May 12, 2023 | $25033.9T | 1,801 |
| Q4 2022 | Feb 10, 2023 | $22998.0T | 1,814 |
| Q3 2022 | Nov 9, 2022 | $21.8T | 1,823 |
| Q2 2022 | Aug 10, 2022 | $22.5T | 1,863 |
| Q1 2022 | May 13, 2022 | $28.5T | 1,910 |
| Q4 2021 | Feb 14, 2022 | $31.9T | 1,963 |
| Q3 2021 | Nov 12, 2021 | $29.4T | 1,879 |
| Q2 2021 | Aug 12, 2021 | $28.9T | 1,888 |
| Q1 2021 | May 13, 2021 | $26.5T | 1,856 |
| Q4 2020 | Feb 9, 2021 | $27.3T | 1,828 |
| Q3 2020 | Nov 6, 2020 | $23.6T | 1,720 |
| Q2 2020 | Aug 12, 2020 | $21.0T | 1,681 |
| Q1 2020 | May 11, 2020 | $16.0T | 1,660 |
| Q4 2019 | Feb 13, 2020 | $19.5T | 1,728 |
| Q3 2019 | Nov 12, 2019 | $17.4T | 1,697 |
| Q2 2019 | Aug 13, 2019 | $17.5T | 1,734 |
| Q1 2019 | May 14, 2019 | $16.4T | 1,705 |
| Q4 2018 | Feb 14, 2019 | $13.7T | 1,654 |
| Q3 2018 | Nov 13, 2018 | $16.3T | 1,619 |
| Q2 2018 | Aug 13, 2018 | $14.7T | 1,586 |
| Q1 2018 | May 15, 2018 | $14.1T | 1,506 |
| Q4 2017 | Feb 14, 2018 | $14.7T | 1,362 |
| Q3 2017 | Nov 13, 2017 | $13.3T | 1,357 |
| Q2 2017 | Aug 4, 2017 | $13.3T | 1,644 |
| Q1 2017 | May 10, 2017 | $12.4T | 1,477 |
| Q4 2016 | Feb 14, 2017 | $11.2T | 1,415 |
| Q3 2016 | Nov 14, 2016 | $11.3T | 1,296 |
| Q2 2016 | Aug 8, 2016 | $10.7T | 1,242 |
| Q1 2016 | May 16, 2016 | $10.6T | 1,218 |
Fund Information
BLAIR WILLIAM & CO/IL is an institutional investment manager that files 13F reports with the SEC. As of the Q4 2025 filing, the fund reported a portfolio valued at $37.3B across 1,867 holdings. The largest position is MICROSOFT CORP (MSFT), representing 4.6% of the portfolio. Compared to the previous quarter, the fund opened 124 new positions and closed 101 positions. 13F filings are required quarterly disclosures that provide transparency into the holdings of institutional investment managers with at least $100 million in qualifying assets.