Filed: 8/11/2026ACC: 0001104659-26-093821
📋 What this filing means
BLAIR WILLIAM & CO/IL filed this quarterly 13F‑HR report disclosing 1998 equity positions with a total reported market value of $38.39B. This filing provides a transparent view of the manager's long equity holdings as of the quarter end.
1998
Positions
$38.39B
Total AUM (reported)
249.81M
Total Shares
Allocation by class
COM$23.40B60.9%
CL A$2.33B6.1%
CAP STK CL C$1.04B2.7%
COM CL A$873.10M2.3%
CAP STK CL A$858.62M2.2%
TR UNIT$633.29M1.6%
COM NEW$620.43M1.6%
Portfolio Concentration
Top 3$4.34B11.3%
4–10$5.76B15.0%
11–25$5.92B15.4%
Rest$22.36B58.3%
Top 3 weight
11.3%
Top 10 weight
26.3%
Voting Authority Distribution
Total shares with voting rights: 249.81M
Sole
Full voting authority
195.19M
shares
% of voting shares78.1%
Shared
Joint voting authority
0.00
shares
% of voting shares0.0%
None
No voting authority
54.62M
shares
% of voting shares21.9%
Investment Discretion (by position count)
Sole1998
Shared0
Other0
Dominant voting typeSole · 78.1% of voting shares
Institutional Holdings1998
Rows:
APPLE INC
SOLEShares5.73M
TypeSH
Market value$1.66B
4.32%
Sole
4.27M
Shared
0.00
None
1.46M
AMAZON COM INC
SOLEShares5.88M
TypeSH
Market value$1.40B
3.65%
Sole
4.44M
Shared
0.00
None
1.43M
MICROSOFT CORP
SOLEShares3.44M
TypeSH
Market value$1.28B
3.35%
Sole
2.67M
Shared
0.00
None
774.82K
NVIDIA CORPORATION
SOLEShares5.37M
TypeSH
Market value$1.08B
2.80%
Sole
4.25M
Shared
0.00
None
1.12M
ALPHABET INC
SOLEShares2.95M
TypeSH
Market value$1.04B
2.72%
Sole
2.45M
Shared
0.00
None
500.81K
ALPHABET INC
SOLEShares2.40M
TypeSH
Market value$858.62M
2.24%
Sole
1.86M
Shared
0.00
None
546.31K
GE VERNOVA INC
SOLEShares659.67K
TypeSH
Market value$775.02M
2.02%
Sole
520.65K
Shared
0.00
None
139.02K
JPMORGAN CHASE & CO
SOLEShares2.27M
TypeSH
Market value$743.16M
1.94%
Sole
1.52M
Shared
0.00
None
755.01K
STATE STR SPDR S&P 500 ETF T
SOLEShares848.03K
TypeSH
Market value$633.29M
1.65%
Sole
709K
Shared
0.00
None
139.03K
VISA INC
SOLEShares1.84M
TypeSH
Market value$631.84M
1.65%
Sole
1.53M
Shared
0.00
None
306.71K
COSTCO WHOLESALE CORPORATION
SOLEShares524.69K
TypeSH
Market value$490.83M
1.28%
Sole
405.35K
Shared
0.00
None
119.34K
IDEXX LABS INC
SOLEShares918.56K
TypeSH
Market value$483.56M
1.26%
Sole
762.22K
Shared
0.00
None
156.33K
AMPHENOL CORP
SOLEShares2.50M
TypeSH
Market value$441.58M
1.15%
Sole
2.17M
Shared
0.00
None
337.60K
MASTERCARD INCORPORATED
SOLEShares842.35K
TypeSH
Market value$432.63M
1.13%
Sole
666.68K
Shared
0.00
None
175.66K
INVESCO EXCHANGE TRADED FD T
SOLEShares1.98M
TypeSH
Market value$421.79M
1.10%
Sole
1.71M
Shared
0.00
None
271.39K
PALO ALTO NETWORKS INC
SOLEShares1.23M
TypeSH
Market value$418.27M
1.09%
Sole
879.56K
Shared
0.00
None
346.96K
ELI LILLY & CO
SOLEShares347.10K
TypeSH
Market value$416.32M
1.08%
Sole
249.36K
Shared
0.00
None
97.74K
META PLATFORMS INC
SOLEShares670.88K
TypeSH
Market value$377.90M
0.98%
Sole
547.75K
Shared
0.00
None
123.13K
VANGUARD INTL EQUITY INDEX F
SOLEShares4.48M
TypeSH
Market value$375.13M
0.98%
Sole
3.98M
Shared
0.00
None
504.08K
MICRON TECHNOLOGY INC
SOLEShares315.88K
TypeSH
Market value$364.62M
0.95%
Sole
272.07K
Shared
0.00
None
43.81K
ISHARES TR
SOLEShares484.70K
TypeSH
Market value$362.99M
0.95%
Sole
412.03K
Shared
0.00
None
72.68K
FASTENAL CO
SOLEShares7.41M
TypeSH
Market value$355.76M
0.93%
Sole
4.59M
Shared
0.00
None
2.81M
BROADCOM INC
SOLEShares929.72K
TypeSH
Market value$351.20M
0.91%
Sole
795.15K
Shared
0.00
None
134.57K
ABBVIE INC
SOLEShares1.29M
TypeSH
Market value$324.08M
0.84%
Sole
1.04M
Shared
0.00
None
246.28K
VANGUARD TAX-MANAGED FDS
SOLEShares4.29M
TypeSH
Market value$305.74M
0.80%
Sole
3.84M
Shared
0.00
None
453.12K
| Issuer | Class | Shares | Type | Value / Portfolio % | Voting — Sole | Shared | None |
|---|---|---|---|---|---|---|---|
APPLE INCSOLE | COM | 5.73M | SH | $1.66B 4.32% | 4.27M | 0.00 | 1.46M |
AMAZON COM INCSOLE | COM | 5.88M | SH | $1.40B 3.65% | 4.44M | 0.00 | 1.43M |
MICROSOFT CORPSOLE | COM | 3.44M | SH | $1.28B 3.35% | 2.67M | 0.00 | 774.82K |
NVIDIA CORPORATIONSOLE | COM | 5.37M | SH | $1.08B 2.80% | 4.25M | 0.00 | 1.12M |
ALPHABET INCSOLE | CAP STK CL C | 2.95M | SH | $1.04B 2.72% | 2.45M | 0.00 | 500.81K |
ALPHABET INCSOLE | CAP STK CL A | 2.40M | SH | $858.62M 2.24% | 1.86M | 0.00 | 546.31K |
GE VERNOVA INCSOLE | COM | 659.67K | SH | $775.02M 2.02% | 520.65K | 0.00 | 139.02K |
JPMORGAN CHASE & COSOLE | COM | 2.27M | SH | $743.16M 1.94% | 1.52M | 0.00 | 755.01K |
STATE STR SPDR S&P 500 ETF TSOLE | TR UNIT | 848.03K | SH | $633.29M 1.65% | 709K | 0.00 | 139.03K |
VISA INCSOLE | COM CL A | 1.84M | SH | $631.84M 1.65% | 1.53M | 0.00 | 306.71K |
COSTCO WHOLESALE CORPORATIONSOLE | COM | 524.69K | SH | $490.83M 1.28% | 405.35K | 0.00 | 119.34K |
IDEXX LABS INCSOLE | COM | 918.56K | SH | $483.56M 1.26% | 762.22K | 0.00 | 156.33K |
AMPHENOL CORPSOLE | CL A | 2.50M | SH | $441.58M 1.15% | 2.17M | 0.00 | 337.60K |
MASTERCARD INCORPORATEDSOLE | CL A | 842.35K | SH | $432.63M 1.13% | 666.68K | 0.00 | 175.66K |
INVESCO EXCHANGE TRADED FD TSOLE | S&P500 EQL WGT | 1.98M | SH | $421.79M 1.10% | 1.71M | 0.00 | 271.39K |
PALO ALTO NETWORKS INCSOLE | COM | 1.23M | SH | $418.27M 1.09% | 879.56K | 0.00 | 346.96K |
ELI LILLY & COSOLE | COM | 347.10K | SH | $416.32M 1.08% | 249.36K | 0.00 | 97.74K |
META PLATFORMS INCSOLE | CL A | 670.88K | SH | $377.90M 0.98% | 547.75K | 0.00 | 123.13K |
VANGUARD INTL EQUITY INDEX FSOLE | ALLWRLD EX US | 4.48M | SH | $375.13M 0.98% | 3.98M | 0.00 | 504.08K |
MICRON TECHNOLOGY INCSOLE | COM | 315.88K | SH | $364.62M 0.95% | 272.07K | 0.00 | 43.81K |
ISHARES TRSOLE | CORE S&P500 ETF | 484.70K | SH | $362.99M 0.95% | 412.03K | 0.00 | 72.68K |
FASTENAL COSOLE | COM | 7.41M | SH | $355.76M 0.93% | 4.59M | 0.00 | 2.81M |
BROADCOM INCSOLE | COM | 929.72K | SH | $351.20M 0.91% | 795.15K | 0.00 | 134.57K |
ABBVIE INCSOLE | COM | 1.29M | SH | $324.08M 0.84% | 1.04M | 0.00 | 246.28K |
VANGUARD TAX-MANAGED FDSSOLE | VAN FTSE DEV MKT | 4.29M | SH | $305.74M 0.80% | 3.84M | 0.00 | 453.12K |
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