BLAIR WILLIAM & CO/IL

CIK: 0000902367Latest portfolio: $37.3B · Q4 2025

Holdings

1,867

Total Value

$37.3B

New Positions

123

Closed Positions

97

#StockSharesValue% PortfolioChangeType
1
MSFTMICROSOFT CORP
3,574,568$1.7B4.64%-32,538
2
AAPLAPPLE INC
5,949,948$1.6B4.34%-42,847
3
AMZNAMAZON COM INC
6,064,424$1.4B3.75%+58K
4
NVDANVIDIA CORPORATION
5,494,350$1.0B2.75%-150,762
5
GOOGALPHABET INC
3,118,759$978.0M2.62%-27,196
6
GOOGLALPHABET INC
2,493,580$779.0M2.09%-32,394
7
JPMJPMORGAN CHASE & CO.
2,309,809$744.0M2.00%+3K
8
IDXXIDEXX LABS INC
1,001,375$676.0M1.81%-30,411
9
VVISA INC
1,929,237$676.0M1.81%-32,916
10
SPYSPDR S&P 500 ETF TR
857,803$584.0M1.57%-1,541
11
MAMASTERCARD INCORPORATED
955,188$545.0M1.46%-21,409
12
METAMETA PLATFORMS INC
736,202$485.0M1.30%+57K
13
COSTCOSTCO WHSL CORP NEW
521,182$448.0M1.20%-30,376
14
GEVGE VERNOVA INC
652,306$426.0M1.14%+24K
15
APHAMPHENOL CORP NEW
2,653,891$358.0M0.96%-97,623
16
LLYELI LILLY & CO
324,796$349.0M0.94%+25K
17
NOWSERVICENOW INC
2,214,840$338.0M0.91%+1.8M
18
UBERUBER TECHNOLOGIES INC
4,107,558$335.0M0.90%-139,935
19
IVVISHARES TR
488,420$334.0M0.90%+42K
20
PGRPROGRESSIVE CORP
1,407,032$320.0M0.86%-32,124
21
DHRDANAHER CORPORATION
1,372,624$314.0M0.84%+7K
22
AVGOBROADCOM INC
896,446$309.0M0.83%+7K
23
ABBVABBVIE INC
1,337,461$305.0M0.82%+74K
24
SYKSTRYKER CORPORATION
844,899$296.0M0.79%-74,606
25
FASTFASTENAL CO
7,014,666$281.0M0.75%+49K

Quarterly Changes

New Positions

Closed Positions

Increased Positions

NameSharesChange
NFLX1.5M+1.3M
VEU2.7M+445K
POCT372K+336K
SMMD480K+293K
MIAX655K+291K
BWXT1.4M+249K
SLV402K+216K
MEC584K+207K
VCYT192K+176K
RDVY753K+175K

Decreased Positions

NameSharesChange
CWAN3.4M-3761687
CSGP2.0M-1104950
DKNG25K-528762
PRCT210K-456176
DVAX1.8M-447167
NEOG11K-416597
EVH43K-395725
TREX131K-341931
CPRT4.4M-323592
THRY231K-316117

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

QuarterFiling DatePortfolio ValueHoldings
Q4 2025Feb 17, 2026$37.3B1,920
Q3 2025Nov 12, 2025$37.6T1,844
Q2 2025Jul 24, 2025$36.0T1,824
Q1 2025May 9, 2025$33.2T1,801
Q4 2024Feb 12, 2025$34.4T1,816
Q3 2024Nov 12, 2024$34050.2T1,821
Q2 2024Aug 12, 2024$32421.1T1,822
Q1 2024May 9, 2024$31838.5T1,787
Q4 2023Feb 12, 2024$29346.8T1,785
Q3 2023Nov 9, 2023$26075.5T1,791
Q2 2023Aug 11, 2023$27298.2T1,809
Q1 2023May 12, 2023$25033.9T1,801
Q4 2022Feb 10, 2023$22998.0T1,814
Q3 2022Nov 9, 2022$21.8T1,823
Q2 2022Aug 10, 2022$22.5T1,863
Q1 2022May 13, 2022$28.5T1,910
Q4 2021Feb 14, 2022$31.9T1,963
Q3 2021Nov 12, 2021$29.4T1,879
Q2 2021Aug 12, 2021$28.9T1,888
Q1 2021May 13, 2021$26.5T1,856
Q4 2020Feb 9, 2021$27.3T1,828
Q3 2020Nov 6, 2020$23.6T1,720
Q2 2020Aug 12, 2020$21.0T1,681
Q1 2020May 11, 2020$16.0T1,660
Q4 2019Feb 13, 2020$19.5T1,728
Q3 2019Nov 12, 2019$17.4T1,697
Q2 2019Aug 13, 2019$17.5T1,734
Q1 2019May 14, 2019$16.4T1,705
Q4 2018Feb 14, 2019$13.7T1,654
Q3 2018Nov 13, 2018$16.3T1,619
Q2 2018Aug 13, 2018$14.7T1,586
Q1 2018May 15, 2018$14.1T1,506
Q4 2017Feb 14, 2018$14.7T1,362
Q3 2017Nov 13, 2017$13.3T1,357
Q2 2017Aug 4, 2017$13.3T1,644
Q1 2017May 10, 2017$12.4T1,477
Q4 2016Feb 14, 2017$11.2T1,415
Q3 2016Nov 14, 2016$11.3T1,296
Q2 2016Aug 8, 2016$10.7T1,242
Q1 2016May 16, 2016$10.6T1,218

Fund Information

CIK0000902367
Most Recent FilingFeb 17, 2026
Number of Filings40

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.