BLAIR WILLIAM & CO/IL — 13F Holdings

2026 Q2  ·  2089 Positions

2026 Q2 Portfolio Activity

In 2026 Q2, BLAIR WILLIAM & CO/IL maintained a portfolio of 2089 distinct positions. The most significant new addition was PATTERN GROUP INC, now representing 0.05% of the total fund value. They heavily accumulated shares in ARISTA NETWORKS INC, increasing the position by 39.4%. The fund also reduced its exposure to DANAHER CORP DEL by 25.1%.
Position History hover any row below to update
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BLAIR WILLIAM & CO/IL Chicago, IL Investment Bank & Asset Manager AUM $37,674M
Fund Overview SEC EDGAR
PCA Score Concentration Risk
Risk ENB
To Excel To CSV
Total Positions
2089
Quarter
2026 Q2
Top Holding
AAPL (4.3%)
Top 10 Concentration
26.3%
Turnover Rate
23.4%
Sector HHI
0.18
Items per page:
Showing 1-50 of 2089
Stock History Sector / Type Port % Prev % Rank / Prev Conviction
Freshness
Change % Change Influence Shares Mkt Value Avg Cost Price Held 1st Owned Source Source Date Date Reported
AAPL
APPLE INC
Technology 4.32% 4.31% #1
Prev: #1
4.2
—
-199,389 -3.4%
P
S
5,731,525 $1,658,473,962
$72.59 +326.2%
$289.11 +7.0%
1999 Q3 13F Filing 2026-06-30 2026-08-11
AMZN
AMAZON COM INC
Consumer Cyclical 3.65% 3.62% #2 1
Prev: #3
3.5
—
-182,814 -3.0%
P
S
5,875,124 $1,400,277,006
$98.09 +163.7%
$238.34 +8.5%
1999 Q2 13F Filing 2026-06-30 2026-08-11
MSFT
MICROSOFT CORP
Technology 3.35% 3.71% #3 1
Prev: #2
2.8
—
-55,536 -1.6%
P
S
3,442,574 $1,284,149,026
$31.53 +1445.8%
$372.32 +30.9%
1999 Q2 13F Filing 2026-06-30 2026-08-11
NVDA
NVIDIA CORPORAT...
Technology 2.80% 2.71% #4
Prev: #4
2.1
—
-53,451 -1.0%
P
S
5,374,424 $1,075,368,561 2005 Q1 13F Filing 2026-06-30 2026-08-11
GOOG
ALPHABET INC
Communication Services 2.72% 2.50% #5
Prev: #5
2.1
—
-82,041 -2.7%
P
S
2,953,724 $1,043,639,186 2005 Q2 13F Filing 2026-06-30 2026-08-11
GOOGL
ALPHABET INC
Communication Services 2.24% 2.01% #6
Prev: #6
1.4
—
-33,496 -1.4%
P
S
2,402,621 $858,624,702 2015 Q4 13F Filing 2026-06-30 2026-08-11
GEV
GE VERNOVA INC
Industrials 2.02% 1.66% #7 1
Prev: #8
1.3
—
-4,930 -0.7%
P
S
659,673 $775,022,876 2024 Q2 13F Filing 2026-06-30 2026-08-11
JPM
JPMORGAN CHASE ...
Financial Services 1.94% 1.94% #8 1
Prev: #7
1.3
—
-36,893 -1.6%
P
S
2,270,360 $743,156,822 1999 Q2 13F Filing 2026-06-30 2026-08-11
SPY
STATE STR SPDR ...
ETF 1.65% 1.58% #9 1
Prev: #10
1.2
—
2,740 0.3%
P
S
848,034 $633,286,009 1999 Q2 13F Filing 2026-06-30 2026-08-11
V
VISA INC
Financial Services 1.65% 1.60% #10 1
Prev: #9
1.2
—
-2,979 -0.2%
P
S
1,841,604 $631,835,921 2008 Q1 13F Filing 2026-06-30 2026-08-11
COST
COSTCO WHOLESAL...
Consumer Defensive 1.28% 1.49% #11 1
Prev: #12
1.0
—
3,415 0.7%
P
S
524,692 $490,833,719 1999 Q2 13F Filing 2026-06-30 2026-08-11
IDXX
IDEXX LABS INC
Healthcare 1.26% 1.52% #12 1
Prev: #11
1.0
—
-27,780 -2.9%
P
S
918,556 $483,564,860 2003 Q4 13F Filing 2026-06-30 2026-08-11
APH
AMPHENOL CORP
Technology 1.15% 0.91% #13 4
Prev: #17
1.0
—
-15,910 -0.6%
P
S
2,504,409 $441,577,319 2008 Q4 13F Filing 2026-06-30 2026-08-11
MA
MASTERCARD INCO...
Financial Services 1.13% 1.32% #14 1
Prev: #13
1.0
—
-81,055 -8.8%
P
S
842,350 $432,630,792 2006 Q2 13F Filing 2026-06-30 2026-08-11
RSP
INVESCO EXCHANG...
Unknown 1.10% 0.92% #15 1
Prev: #16
2.4
—
301,788 18.0%
P
S
1,982,392 $421,793,485 2017 Q4 13F Filing 2026-06-30 2026-08-11
PANW
PALO ALTO NETWO...
Technology 1.09% 0.60% #16 23
Prev: #39
0.9
—
-78,339 -6.0%
P
S
1,226,519 $418,267,566 2012 Q3 13F Filing 2026-06-30 2026-08-11
LLY
ELI LILLY & CO
Healthcare 1.08% 0.85% #17 3
Prev: #20
2.4
—
23,080 7.1%
P
S
347,098 $416,319,968 1999 Q2 13F Filing 2026-06-30 2026-08-11
META
META PLATFORMS ...
Communication Services 0.98% 1.18% #18 4
Prev: #14
0.9
—
-50,839 -7.0%
P
S
670,881 $377,900,414 2012 Q2 13F Filing 2026-06-30 2026-08-11
VEU
VANGUARD INTL E...
ETF 0.98% 0.90% #19
Prev: #19
2.4
—
310,593 7.5%
P
S
4,479,218 $375,134,515 2008 Q3 13F Filing 2026-06-30 2026-08-11
MU
MICRON TECHNOLO...
Technology 0.95% 0.32% #20 54
Prev: #74
0.9
—
-16,433 -4.9%
P
S
315,878 $364,615,192 1999 Q2 13F Filing 2026-06-30 2026-08-11
IVV
ISHARES TR
ETF 0.95% 0.91% #21 3
Prev: #18
0.9
—
-1,135 -0.2%
P
S
484,704 $362,990,262 2008 Q2 13F Filing 2026-06-30 2026-08-11
FAST
FASTENAL CO
Industrials 0.93% 0.98% #22 7
Prev: #15
0.9
—
33,352 0.5%
P
S
7,407,059 $355,761,040 1999 Q2 13F Filing 2026-06-30 2026-08-11
AVGO
BROADCOM INC
Technology 0.91% 0.81% #23 1
Prev: #24
0.9
—
11,388 1.2%
P
S
929,716 $351,200,187 2016 Q2 13F Filing 2026-06-30 2026-08-11
ABBV
ABBVIE INC
Healthcare 0.84% 0.83% #24 1
Prev: #23
0.8
—
-46,252 -3.5%
P
S
1,287,857 $324,076,456 2013 Q1 13F Filing 2026-06-30 2026-08-11
VEA
VANGUARD TAX-MA...
ETF 0.80% 0.71% #25 3
Prev: #28
2.3
—
428,937 11.1%
P
S
4,291,023 $305,735,367 2011 Q2 13F Filing 2026-06-30 2026-08-11
BWXT
BWX TECHNOLOGIE...
Industrials 0.79% 0.84% #26 4
Prev: #22
2.3
—
118,292 8.2%
P
S
1,556,417 $302,956,557 2016 Q3 13F Filing 2026-06-30 2026-08-11
VOO
VANGUARD INDEX ...
ETF 0.75% 0.68% #27 4
Prev: #31
2.3
—
21,992 5.5%
P
S
419,372 $288,028,908 2013 Q3 13F Filing 2026-06-30 2026-08-11
ANET
ARISTA NETWORKS...
Technology 0.71% 0.41% #28 27
Prev: #55
2.8
—
453,489 39.4%
P
S
1,604,716 $272,609,153 2016 Q3 13F Filing 2026-06-30 2026-08-11
VTV
VANGUARD INDEX ...
ETF 0.70% 0.66% #29 7
Prev: #36
2.3
—
66,585 5.7%
P
S
1,232,497 $268,598,032 2009 Q4 13F Filing 2026-06-30 2026-08-11
QQQ
INVESCO QQQ TR
ETF 0.69% 0.51% #30 15
Prev: #45
2.3
—
48,203 15.5%
P
S
359,219 $264,528,652 1999 Q4 13F Filing 2026-06-30 2026-08-11
WMT
WALMART INC
Consumer Defensive 0.67% 0.85% #31 10
Prev: #21
0.8
—
-103,403 -4.4%
P
S
2,270,879 $257,199,781 1999 Q2 13F Filing 2026-06-30 2026-08-11
HD
HOME DEPOT INC
Consumer Cyclical 0.64% 0.72% #32 5
Prev: #27
0.8
—
-63,829 -8.4%
P
S
697,590 $246,025,938 1999 Q2 13F Filing 2026-06-30 2026-08-11
JNJ
JOHNSON & JOHNS...
Healthcare 0.63% 0.67% #33 1
Prev: #34
0.8
—
630 0.1%
P
S
956,262 $242,861,932 1999 Q2 13F Filing 2026-06-30 2026-08-11
BRK/B
BERKSHIRE HATHA...
Financial Services 0.63% 0.68% #34 2
Prev: #32
0.8
—
-11,736 -2.4%
P
S
483,586 $241,981,741 2009 Q4 13F Filing 2026-06-30 2026-08-11
PSTG
EVERPURE INC
Technology 0.63% 0.49% #35 11
Prev: #46
0.8
—
130,048 4.5%
P
S
3,048,094 $240,159,308 2016 Q1 13F Filing 2026-06-30 2026-08-11
ECL
ECOLAB INC
Basic Materials 0.62% 0.66% #36 1
Prev: #35
0.7
—
-12,117 -1.4%
P
S
854,294 $238,014,780 1999 Q2 13F Filing 2026-06-30 2026-08-11
WSO
WATSCO INC
Industrials 0.61% 0.61% #37
Prev: #37
0.7
—
-18,676 -3.2%
P
S
564,024 $235,045,592 2001 Q1 13F Filing 2026-06-30 2026-08-11
AXP
AMERICAN EXPRES...
Financial Services 0.60% 0.60% #38
Prev: #38
0.7
—
-13,446 -1.9%
P
S
680,321 $230,118,643 1999 Q2 13F Filing 2026-06-30 2026-08-11
PGR
PROGRESSIVE COR...
Financial Services 0.59% 0.69% #39 9
Prev: #30
0.7
—
-185,645 -15.2%
P
S
1,034,104 $225,900,097 1999 Q2 13F Filing 2026-06-30 2026-08-11
NOW
SERVICENOW INC
Technology 0.58% 0.54% #40 2
Prev: #42
2.7
—
439,042 24.4%
P
S
2,240,030 $222,390,177 2014 Q4 13F Filing 2026-06-30 2026-08-11
TDG
TRANSDIGM GROUP...
Industrials 0.57% 0.55% #41
Prev: #41
0.7
—
-1,288 -0.8%
P
S
164,960 $219,733,476 2009 Q1 13F Filing 2026-06-30 2026-08-11
SYK
STRYKER CORPORA...
Healthcare 0.56% 0.80% #42 17
Prev: #25
0.7
—
-163,309 -19.3%
P
S
684,392 $215,474,067 1999 Q2 13F Filing 2026-06-30 2026-08-11
IWM
ISHARES TR
ETF 0.55% 0.45% #43 8
Prev: #51
2.2
—
72,823 11.6%
P
S
701,051 $210,630,787 2003 Q1 13F Filing 2026-06-30 2026-08-11
CRWD
CROWDSTRIKE HLD...
Technology 0.54% 0.28% #44 42
Prev: #86
2.2
—
19,856 7.9%
P
S
272,235 $207,753,341 2019 Q3 13F Filing 2026-06-30 2026-08-11
UBER
UBER TECHNOLOGI...
Technology 0.53% 0.68% #45 12
Prev: #33
0.7
—
-505,006 -15.3%
P
S
2,794,590 $201,657,621 2019 Q2 13F Filing 2026-06-30 2026-08-11
VTI
VANGUARD INDEX ...
ETF 0.51% 0.34% #46 22
Prev: #68
2.7
—
156,154 41.9%
P
S
528,525 $195,575,374 2008 Q2 13F Filing 2026-06-30 2026-08-11
AAON
AAON INC
Industrials 0.51% 0.38% #47 13
Prev: #60
0.7
—
-88,769 -5.5%
P
S
1,533,434 $194,531,388 2024 Q2 13F Filing 2026-06-30 2026-08-11
BA
BOEING CO
Industrials 0.50% 0.53% #48 4
Prev: #44
0.7
—
-43,706 -4.7%
P
S
878,396 $190,146,384 1999 Q2 13F Filing 2026-06-30 2026-08-11
DHR
DANAHER CORP DE...
Healthcare 0.48% 0.70% #49 20
Prev: #29
0.2
—
-325,709 -25.1%
P
S
971,095 $184,974,108 1999 Q2 13F Filing 2026-06-30 2026-08-11
CTAS
CINTAS CORP
Industrials 0.47% 0.47% #50 1
Prev: #49
2.2
—
89,977 9.2%
P
S
1,063,530 $180,885,157 1999 Q2 13F Filing 2026-06-30 2026-08-11
Showing 1-50 of 2089 holdings

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