2026 Q2 Portfolio Activity
In 2026 Q2, WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC maintained a portfolio of 460 distinct positions. The most significant new addition was GE AEROSPACE, now representing 0.89% of the total fund value. They heavily accumulated shares in ALPHABET INC, increasing the position by 27.4%. The fund also reduced its exposure to MICROSOFT CORP by 29.3%.
Position History
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Total Positions
460
Quarter
2026 Q2
Top Holding
TSM (7.1%)
Top 10 Concentration
28.9%
Turnover Rate
23.4%
Sector HHI
0.18
Items per page:
Showing 1-50 of 460
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
TSM
TAIWAN SEMICOND...
|
Technology | 7.09% | 6.16% |
#1
Prev: #1
|
5.3 |
—
|
-581,852 | -10.5% |
P
S
|
4,936,408 | $2,357,357,783 | 2015 Q3 | 13F Filing | 2026-06-30 | 2026-08-12 | |||
|
NVDA
NVIDIA CORPORAT...
|
Technology | 5.17% | 5.15% |
#2
Prev: #2
|
4.1 |
—
|
-342,735 | -3.8% |
P
S
|
8,599,021 | $1,720,578,016 | 2021 Q2 | 13F Filing | 2026-06-30 | 2026-08-12 | |||
|
GOOGL
ALPHABET INC
|
Communication Services | 3.43% | 2.38% |
#3
2
Prev: #5
|
4.9 |
—
|
686,407 | 27.4% |
P
S
|
3,191,012 | $1,140,372,074 | 2015 Q4 | 13F Filing | 2026-06-30 | 2026-08-12 | |||
|
AAPL
APPLE INC
|
Technology | 2.84% | 4.04% |
#4
1
Prev: #3
|
1.6 |
—
|
-1,552,519 | -32.3% |
P
S
|
3,259,914 | $943,288,764 | 2015 Q3 | 13F Filing | 2026-06-30 | 2026-08-12 | |||
|
AVGO
BROADCOM INC
|
Technology | 2.34% | 2.25% |
#5
1
Prev: #6
|
1.9 |
—
|
-145,423 | -6.6% |
P
S
|
2,056,135 | $776,705,149 | 2016 Q1 | 13F Filing | 2026-06-30 | 2026-08-12 | |||
|
MSFT
MICROSOFT CORP
|
Technology | 2.30% | 3.54% |
#6
2
Prev: #4
|
0.9 |
—
|
-848,140 | -29.3% |
P
S
|
2,048,642 | $764,184,389 | 2015 Q3 | 13F Filing | 2026-06-30 | 2026-08-12 | |||
|
META
META PLATFORMS ...
|
Communication Services | 1.61% | 1.92% |
#7
1
Prev: #8
|
1.1 |
—
|
-63,007 | -6.2% |
P
S
|
950,115 | $535,190,234 | 2015 Q3 | 13F Filing | 2026-06-30 | 2026-08-12 | |||
|
AMZN
AMAZON COM INC
|
Consumer Cyclical | 1.42% | 2.18% |
#8
1
Prev: #7
|
0.6 |
—
|
-1,176,544 | -37.2% |
P
S
|
1,987,085 | $473,601,839 | 2015 Q3 | 13F Filing | 2026-06-30 | 2026-08-12 | |||
|
MA
MASTERCARD INCO...
|
Financial Services | 1.42% | 1.75% |
#9
Prev: #9
|
1.1 |
—
|
-142,646 | -13.4% |
P
S
|
918,005 | $471,487,500 | 2015 Q3 | 13F Filing | 2026-06-30 | 2026-08-12 | |||
|
AMD
ADVANCED MICRO ...
|
Technology | 1.33% | 0.70% |
#10
11
Prev: #21
|
0.5 |
—
|
-279,077 | -26.8% |
P
S
|
763,517 | $443,534,660 | 2019 Q2 | 13F Filing | 2026-06-30 | 2026-08-12 | |||
|
AMAT
APPLIED MATLS I...
|
Technology | 1.08% | 0.04% |
#11
294
Prev: #305
|
3.4 |
—
|
463,006 | 1325.1% |
P
S
|
497,946 | $360,014,958 | 2023 Q4 | 13F Filing | 2026-06-30 | 2026-08-12 | |||
|
GE
GE AEROSPACE
|
Industrials | 0.89% | — |
#12
Prev: #—
|
3.9 |
—
|
790,801 | — |
NEW
|
790,801 | $295,546,058 | 2015 Q4 | 13F Filing | 2026-06-30 | 2026-08-12 | |||
|
AZNCF
ASTRAZENECA PLC
|
Unknown | 0.85% | 1.25% |
#13
3
Prev: #10
|
0.3 |
—
|
-427,360 | -22.0% |
P
S
|
1,514,795 | $283,249,808 | 2026 Q1 | 13F Filing | 2026-06-30 | 2026-08-12 | |||
|
PRMB
PRIMO BRANDS CO...
|
Consumer Defensive | 0.84% | 0.81% |
#14
3
Prev: #17
|
0.8 |
—
|
-1,629,369 | -12.5% |
P
S
|
11,426,823 | $279,271,556 | 2024 Q4 | 13F Filing | 2026-06-30 | 2026-08-12 | |||
|
PSTG
EVERPURE INC
|
Technology | 0.82% | 0.56% |
#15
26
Prev: #41
|
2.3 |
—
|
573,900 | 19.9% |
P
S
|
3,455,381 | $272,249,469 | 2018 Q1 | 13F Filing | 2026-06-30 | 2026-08-12 | |||
|
APH
AMPHENOL CORP
|
Technology | 0.81% | 0.45% |
#16
44
Prev: #60
|
2.8 |
—
|
457,625 | 42.5% |
P
S
|
1,535,059 | $270,661,603 | 2026 Q1 | 13F Filing | 2026-06-30 | 2026-08-12 | |||
|
LIN
LINDE PLC
|
Basic Materials | 0.79% | 1.04% |
#17
6
Prev: #11
|
0.3 |
—
|
-131,385 | -20.6% |
P
S
|
504,953 | $262,040,310 | 2018 Q4 | 13F Filing | 2026-06-30 | 2026-08-12 | |||
|
ONTO
ONTO INNOVATION...
|
Technology | 0.76% | 0.65% |
#18
9
Prev: #27
|
0.3 |
—
|
-298,836 | -31.0% |
P
S
|
665,377 | $251,811,926 | 2023 Q2 | 13F Filing | 2026-06-30 | 2026-08-12 | |||
|
BWA
BORGWARNER INC
|
Consumer Cyclical | 0.76% | 0.52% |
#19
32
Prev: #51
|
2.8 |
—
|
900,645 | 31.2% |
P
S
|
3,784,707 | $251,304,551 | 2015 Q3 | 13F Filing | 2026-06-30 | 2026-08-12 | |||
|
CG
CARLYLE GROUP I...
|
Financial Services | 0.75% | 1.01% |
#20
8
Prev: #12
|
0.8 |
—
|
-386,204 | -6.1% |
P
S
|
5,914,905 | $249,076,659 | 2022 Q4 | 13F Filing | 2026-06-30 | 2026-08-12 | |||
|
ARGX
ARGENX SE
|
Healthcare | 0.74% | 0.64% |
#21
9
Prev: #30
|
0.8 |
—
|
-1,450 | -0.5% |
P
S
|
264,617 | $245,489,701 | 2025 Q4 | 13F Filing | 2026-06-30 | 2026-08-12 | |||
|
MLI
MUELLER INDS IN...
|
Industrials | 0.73% | 0.77% |
#22
4
Prev: #18
|
0.8 |
—
|
-123,590 | -5.9% |
P
S
|
1,986,139 | $244,156,078 | 2024 Q4 | 13F Filing | 2026-06-30 | 2026-08-12 | |||
|
MNST
MONSTER BEVERAG...
|
Consumer Defensive | 0.73% | 0.70% |
#23
3
Prev: #20
|
0.8 |
—
|
-397,111 | -13.5% |
P
S
|
2,538,136 | $243,965,632 | 2015 Q3 | 13F Filing | 2026-06-30 | 2026-08-12 | |||
|
FFIV
F5 INC
|
Technology | 0.73% | 0.62% |
#24
9
Prev: #33
|
0.8 |
—
|
-63,677 | -9.8% |
P
S
|
586,271 | $243,865,285 | 2017 Q4 | 13F Filing | 2026-06-30 | 2026-08-12 | |||
|
BAP
CREDICORP LTD
|
Financial Services | 0.73% | 0.70% |
#25
3
Prev: #22
|
0.8 |
—
|
2,454 | 0.4% |
P
S
|
625,144 | $243,543,600 | 2015 Q4 | 13F Filing | 2026-06-30 | 2026-08-12 | |||
|
CW
CURTISS WRIGHT ...
|
Industrials | 0.72% | 0.52% |
#26
23
Prev: #49
|
2.8 |
—
|
85,237 | 36.7% |
P
S
|
317,306 | $240,441,795 | 2015 Q3 | 13F Filing | 2026-06-30 | 2026-08-12 | |||
|
ITUB
ITAU UNIBANCO H...
|
Preferred | 0.69% | 0.88% |
#27
13
Prev: #14
|
0.8 |
—
|
-3,401,226 | -10.7% |
P
S
|
28,283,482 | $231,061,774 | 2016 Q4 | 13F Filing | 2026-06-30 | 2026-08-12 | |||
|
SNOW
SNOWFLAKE INC
|
Technology | 0.69% | 0.56% |
#28
14
Prev: #42
|
0.3 |
—
|
-226,438 | -20.1% |
P
S
|
901,087 | $229,326,642 | 2025 Q3 | 13F Filing | 2026-06-30 | 2026-08-12 | |||
|
TWST
TWIST BIOSCIENC...
|
Healthcare | 0.67% | 0.83% |
#29
14
Prev: #15
|
0.3 |
—
|
-3,095,124 | -58.7% |
P
S
|
2,174,594 | $223,722,231 | 2020 Q1 | 13F Filing | 2026-06-30 | 2026-08-12 | |||
|
TEVA
TEVA PHARMACEUT...
|
Healthcare | 0.67% | 0.14% |
#30
119
Prev: #149
|
3.3 |
—
|
5,167,554 | 362.5% |
P
S
|
6,593,221 | $223,369,747 | 2015 Q3 | 13F Filing | 2026-06-30 | 2026-08-12 | |||
|
UNH
UNITEDHEALTH GR...
|
Healthcare | 0.65% | 0.60% |
#31
5
Prev: #36
|
0.3 |
—
|
-149,876 | -22.3% |
P
S
|
523,387 | $217,535,213 | 2015 Q3 | 13F Filing | 2026-06-30 | 2026-08-12 | |||
|
CRWD
CROWDSTRIKE HLD...
|
Technology | 0.65% | — |
#32
Prev: #—
|
3.8 |
—
|
281,409 | — |
NEW
|
281,409 | $214,754,464 | 2022 Q1 | 13F Filing | 2026-06-30 | 2026-08-12 | |||
|
RRX
REGAL REXNORD C...
|
Industrials | 0.64% | 0.52% |
#33
17
Prev: #50
|
2.3 |
—
|
53,646 | 6.4% |
P
S
|
891,139 | $212,260,398 | 2021 Q2 | 13F Filing | 2026-06-30 | 2026-08-12 | |||
|
KRYS
KRYSTAL BIOTECH...
|
Healthcare | 0.64% | 0.35% |
#34
49
Prev: #83
|
2.8 |
—
|
162,975 | 40.0% |
P
S
|
570,153 | $211,908,766 | 2025 Q2 | 13F Filing | 2026-06-30 | 2026-08-12 | |||
|
CRS
CARPENTER TECHN...
|
Industrials | 0.62% | 0.46% |
#35
23
Prev: #58
|
0.7 |
—
|
-18,289 | -5.2% |
P
S
|
332,607 | $205,165,302 | 2015 Q3 | 13F Filing | 2026-06-30 | 2026-08-12 | |||
|
POWI
POWER INTEGRATI...
|
Technology | 0.60% | 0.40% |
#36
32
Prev: #68
|
0.7 |
—
|
1,330 | 0.1% |
P
S
|
2,382,007 | $199,516,906 | 2018 Q2 | 13F Filing | 2026-06-30 | 2026-08-12 | |||
|
NVT
NVENT ELEC PLC
|
Industrials | 0.60% | 0.48% |
#37
18
Prev: #55
|
0.7 |
—
|
-66,111 | -5.4% |
P
S
|
1,167,763 | $198,064,282 | 2024 Q3 | 13F Filing | 2026-06-30 | 2026-08-12 | |||
|
GH
GUARDANT HEALTH...
|
Healthcare | 0.59% | 0.29% |
#38
60
Prev: #98
|
2.7 |
—
|
360,206 | 37.9% |
P
S
|
1,311,320 | $196,737,340 | 2026 Q1 | 13F Filing | 2026-06-30 | 2026-08-12 | |||
|
HALO
HALOZYME THERAP...
|
Healthcare | 0.59% | 0.54% |
#39
7
Prev: #46
|
0.7 |
—
|
-14,925 | -0.6% |
P
S
|
2,511,050 | $196,539,884 | 2019 Q1 | 13F Filing | 2026-06-30 | 2026-08-12 | |||
|
TLN
TALEN ENERGY CO...
|
Utilities | 0.58% | 0.55% |
#40
3
Prev: #43
|
0.7 |
—
|
-27,554 | -5.2% |
P
S
|
497,660 | $191,230,832 | 2024 Q4 | 13F Filing | 2026-06-30 | 2026-08-12 | |||
|
TRU
TRANSUNION
|
Financial Services | 0.57% | 0.66% |
#41
15
Prev: #26
|
0.7 |
—
|
-242,443 | -8.4% |
P
S
|
2,648,744 | $191,080,410 | 2017 Q1 | 13F Filing | 2026-06-30 | 2026-08-12 | |||
|
CCJ
CAMECO CORP
|
Energy | 0.57% | 0.60% |
#42
7
Prev: #35
|
2.2 |
—
|
176,432 | 10.5% |
P
S
|
1,858,735 | $189,330,699 | 2018 Q3 | 13F Filing | 2026-06-30 | 2026-08-12 | |||
|
STRL
STERLING INFRAS...
|
Industrials | 0.56% | 0.44% |
#43
19
Prev: #62
|
0.2 |
—
|
-99,724 | -30.8% |
P
S
|
223,697 | $187,762,314 | 2025 Q3 | 13F Filing | 2026-06-30 | 2026-08-12 | |||
|
COST
COSTCO WHOLESAL...
|
Consumer Defensive | 0.56% | 1.00% |
#44
31
Prev: #13
|
0.2 |
—
|
-103,113 | -34.1% |
P
S
|
199,355 | $186,490,622 | 2015 Q3 | 13F Filing | 2026-06-30 | 2026-08-12 | |||
|
ALHC
ALIGNMENT HEALT...
|
Healthcare | 0.56% | 0.30% |
#45
48
Prev: #93
|
2.7 |
—
|
2,546,789 | 48.8% |
P
S
|
7,761,403 | $184,799,005 | 2023 Q1 | 13F Filing | 2026-06-30 | 2026-08-12 | |||
|
CHRW
C H ROBINSON WO...
|
Industrials | 0.55% | 0.57% |
#46
6
Prev: #40
|
0.7 |
—
|
-63,361 | -6.1% |
P
S
|
978,297 | $184,252,457 | 2025 Q4 | 13F Filing | 2026-06-30 | 2026-08-12 | |||
|
STX
SEAGATE TECHNOL...
|
Technology | 0.55% | — |
#47
Prev: #—
|
3.7 |
—
|
190,847 | — |
NEW
|
190,847 | $184,167,355 | 2026 Q2 | 13F Filing | 2026-06-30 | 2026-08-12 | |||
|
DIOD
DIODES INC
|
Technology | 0.55% | 0.10% |
#48
141
Prev: #189
|
3.2 |
—
|
1,241,124 | 281.1% |
P
S
|
1,682,686 | $184,153,156 | 2023 Q3 | 13F Filing | 2026-06-30 | 2026-08-12 | |||
|
BWXT
BWX TECHNOLOGIE...
|
Industrials | 0.55% | 0.66% |
#49
24
Prev: #25
|
0.7 |
—
|
-40,549 | -4.1% |
P
S
|
941,233 | $183,211,003 | 2016 Q3 | 13F Filing | 2026-06-30 | 2026-08-12 | |||
|
AKAM
AKAMAI TECHNOLO...
|
Technology | 0.55% | 0.61% |
#50
16
Prev: #34
|
0.7 |
—
|
-83,593 | -5.2% |
P
S
|
1,535,467 | $181,507,554 | 2015 Q3 | 13F Filing | 2026-06-30 | 2026-08-12 |
Showing 1-50 of 460 holdings