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
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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
BLAIR WILLIAM & CO/IL Full Holdings List — 2026 Q2
| Stock | History | Sector / Type | Port % | Prev % | Rank / Prev | Conviction | 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%
|
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 | 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 | 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