Common Fund Bets
See what stocks and ETFs funds are collectively bullish/bearish on
Largest Fund Trades
Explore the largest stock and ETF buys and sells made by funds
High Conviction Trades
Discover high conviction trades that caused a significant change in a fund's stake in a stock
Fund Manager Portfolios
Gain insights from the world’s largest funds and super investors
Fund Manager Index
Stock index based on fund manager consensus updated each quarter
Sign in Sign up
We are live on ! Find out more
William Blair & Company

William Blair & Company Portfolio holdings

AUM $34.9B
1-Year Est. Return 18.88%
This Fund
S&P 500
2026 Q1 2025 Q4 2025 Q3 2025 Q2 2025 Q1 2024 Q4 2024 Q3 2024 Q2 2024 Q1 2023 Q4 2023 Q3 2023 Q2 2023 Q1 2022 Q4 2022 Q3 2022 Q2 2022 Q1 2021 Q4 2021 Q3 2021 Q2 2021 Q1 2020 Q4 2020 Q3 2020 Q2 2020 Q1 2019 Q4 2019 Q3 2019 Q2 2019 Q1 2018 Q4 2018 Q3 2018 Q2 2018 Q1 2017 Q4 2017 Q3 2017 Q2 2017 Q1 2016 Q4 2016 Q3 2016 Q2 2016 Q1 2015 Q4 2015 Q3 2015 Q2 2015 Q1 2014 Q4 2014 Q3 2014 Q2 2014 Q1 2013 Q4 2013 Q3 2013 Q2
This Quarter Est. Return
+1.36%
1 Year Est. Return
+18.88%
3 Year Est. Return
+73.84%
5 Year Est. Return
+90.13%
10 Year Est. Return
+563.35%
AUM
$17.4B
AUM Growth
-$134M (-0.77%)
Cap. Flow
-$77.4M
Cap. Flow % of AUM
-0.45%
Top 10 Holdings % Top 10 Hldgs %
22.49%
Holding
1,807
New
76
Increased
584
Reduced
700
Closed
110

Top Buys

Rank Stock Value
1
DIS icon
Walt Disney
DIS
+$38.7M
2
BX icon
Blackstone
BX
+$30.7M
3
FISV
Fiserv Inc
FISV
+$22.7M
4
COLD icon
Americold
COLD
+$18.8M
5
PRO
PROS Holdings
PRO
+$16.9M

Top Sells

Rank Stock Value
1
NFLX icon
Netflix
NFLX
+$45.9M
2
P
Everpure Inc
P
+$43.7M
3
WDAY icon
Workday
WDAY
+$41.7M
4
SMAR
Smartsheet Inc.
SMAR
+$27.6M
5
KMPR icon
Kemper
KMPR
+$21.8M

Sector Composition

Rank Sector Weight
1 Technology 22.76%
2 Healthcare 17.55%
3 Financials 12.49%
4 Consumer Discretionary 10.27%
5 Industrials 9.42%
New
Increased
Maintained
Reduced
Closed
Shares
Call Options
Put Options
Stocks
ETFs
Mega Cap
Over $200B
Large Cap
$10B to $200B
Mid Cap
$2B to $10B
Small Cap
$250M to $2B
Micro Cap
Under $250M
Communication Services
Consumer Discretionary
Consumer Staples
Energy
Financials
Healthcare
Industrials
Materials
Real Estate
Technology
Utilities
Communication Services
Advertising Agencies
Broadcasting
Electronic Gaming & Multimedia
Entertainment
Internet Content & Information
Publishing
Telecom Services
Consumer Discretionary
Apparel Manufacturing
Apparel Retail
Auto Manufacturers
Auto Parts
Auto & Truck Dealerships
Department Stores
Footwear & Accessories
Furnishings, Fixtures & Appliances
Gambling
Home Improvement Retail
Internet Retail
Leisure
Lodging
Luxury Goods
Packaging & Containers
Personal Services
Recreational Vehicles
Residential Construction
Resorts & Casinos
Restaurants
Specialty Retail
Textile Manufacturing
Travel Services
Consumer Staples
Beverages - Brewers
Beverages - Non-Alcoholic
Beverages - Wineries & Distilleries
Confectioners
Discount Stores
Education & Training Services
Farm Products
Food Distribution
Grocery Stores
Household & Personal Products
Packaged Foods
Tobacco
Energy
Oil & Gas Drilling
Oil & Gas Equipment & Services
Oil & Gas Exploration & Production
Oil & Gas Integrated
Oil & Gas Midstream
Oil & Gas Refining & Marketing
Thermal Coal
Uranium
Financials
Asset Management
Banks - Diversified
Banks - Regional
Capital Markets
Credit Services
Diversified Insurance
Financial Conglomerates
Financial Data & Stock Exchanges
Insurance Brokers
Life Insurance
Mortgage Finance
Property & Casualty Insurance
Reinsurance
Shell Companies
Specialty - Insurance
Healthcare
Biotechnology
Diagnostics & Research
Drug Manufacturers - General
Drug Manufacturers - Specialty & Generic
Healthcare Plans
Health Information Services
Medical Care Facilities
Medical Devices
Medical Distribution
Medical Instruments & Supplies
Pharmaceutical Retailers
Industrials
Aerospace & Defense
Airlines
Airports & Air Services
Building Products & Equipment
Business Equipment & Supplies
Conglomerates
Consulting Services
Electrical Equipment & Parts
Engineering & Construction
Farm & Heavy Construction Machinery
Industrial Distribution
Infrastructure Operations
Integrated Freight & Logistics
Marine Shipping
Metal Fabrication
Pollution & Treatment Controls
Railroads
Rental & Leasing Services
Security & Protection Services
Specialty Business Services
Specialty Industrial Machinery
Staffing & Employment Services
Tools & Accessories
Trucking
Waste Management
Materials
Agricultural Inputs
Aluminum
Building Materials
Chemicals
Coking Coal
Copper
Gold
Lumber & Wood Production
Other Industrial Metals & Mining
Other Precious Metals & Mining
Paper & Paper Products
Silver
Specialty Chemicals
Steel
Real Estate
Diversified REIT
Healthcare Facilities REIT
Hotel & Motel REIT
Industrial REIT
Mortgage REIT
Office REIT
Real Estate Development
Real Estate Diversified
Real Estate Services
Residential REIT
Retail REIT
Specialty REIT
Technology
Communication Equipment
Computer Hardware
Consumer Electronics
Electronic Components
Electronics & Computer Distribution
Information Technology Services
Scientific & Technical Instruments
Semiconductor Equipment & Materials
Semiconductors
Software - Application
Software - Infrastructure
Solar
Utilities
Diversified Utilities
Electric Utilities
Gas Utilities
Independent Power Producers
Renewable Electricity
Water Utilities
# Name Market Value Portfolio Weight Shares or Principal Change
in Stake
Capital Flow
1076
MTB icon
1076
M&T Bank
MTB
$36.1B
$329K ﹤0.01%
2,085
-680
-25% -$107K
1077
FDN icon
1077
First Trust Dow Jones Internet Index Fund ETF
FDN
$5.34B
$327K ﹤0.01%
2,429
-251
-9% -$35.5K
1078
VRTU
1078
DELISTED
Virtusa Corporation
VRTU
$327K ﹤0.01%
9,073
-674
-7% -$27K
1079
ASML icon
1079
ASML
ASML
$655B
$326K ﹤0.01%
1,312
+175
+15% +$39.4K
1080
FTS icon
1080
Fortis
FTS
$28.6B
$326K ﹤0.01%
7,701
– –
1081
OTEX icon
1081
Open Text
OTEX
$6.21B
$326K ﹤0.01%
8,000
– –
1082
SWKS icon
1082
Skyworks Solutions
SWKS
$10.1B
$325K ﹤0.01%
4,106
+154
+4% +$12.3K
1083
MCK icon
1083
McKesson
MCK
$102B
$321K ﹤0.01%
2,348
+702
+43% +$99.6K
1084
SSNC icon
1084
SS&C Technologies
SSNC
$18.7B
$321K ﹤0.01%
+6,232
New +$319K
1085
DSGX icon
1085
Descartes Systems
DSGX
$6.67B
$320K ﹤0.01%
7,950
-2,125
-21% -$78.6K
1086
GRFS
1086
Grifois
GRFS
$5.33B
$319K ﹤0.01%
15,924
– –
1087
OOMA icon
1087
Ooma
OOMA
$588M
$319K ﹤0.01%
30,710
-7,085
-19% -$83K
1088
PS
1088
DELISTED
Pluralsight, Inc. Class A Common Stock
PS
$317K ﹤0.01%
18,900
+500
+3% +$10.8K
1089
HZNP
1089
DELISTED
Horizon Therapeutics Public Limited Company Ordinary Shares
HZNP
$317K ﹤0.01%
11,658
-1,275
-10% -$33K
1090
BNS icon
1090
Scotiabank
BNS
$108B
$316K ﹤0.01%
5,550
-300
-5% -$16.1K
1091
HWM icon
1091
Howmet Aerospace
HWM
$116B
$316K ﹤0.01%
15,858
– –
1092
INSG icon
1092
Inseego
INSG
$87.1M
$314K ﹤0.01%
6,550
+3,950
+152% +$184K
1093
XSW icon
1093
State Street SPDR S&P Software & Services ETF
XSW
$471M
$314K ﹤0.01%
3,363
– –
1094
KNOW
1094
DELISTED
Direxion All Cap Insider Sentiment Shares
KNOW
$313K ﹤0.01%
8,178
+44
+0.5% +$1.69K
1095
B
1095
Barrick Mining
B
$69.3B
$312K ﹤0.01%
17,985
+7,300
+68% +$129K
1096
KEYS icon
1096
Keysight
KEYS
$57.6B
$312K ﹤0.01%
3,206
+897
+39% +$83.1K
1097
CM icon
1097
Canadian Imperial Bank of Commerce
CM
$108B
$311K ﹤0.01%
7,534
-414
-5% -$16.3K
1098
TTWO icon
1098
Take-Two Interactive
TTWO
$43.5B
$310K ﹤0.01%
+2,471
New +$308K
1099
CISN
1099
DELISTED
Cision Ltd. Ordinary Share
CISN
$310K ﹤0.01%
40,300
-1,000
-2% -$8.61K
1100
IGF icon
1100
iShares Global Infrastructure ETF
IGF
$10.8B
$309K ﹤0.01%
6,659
-30
-0.4% -$1.37K
1
42 43
44
45 46
72

Similar funds

SAM
Storebrand Asset Management Lysaker, Norway $34.8B AUM 25.49% 1-Year Est. Return
Chevy Chase Trust
Chevy Chase Trust Bethesda, Maryland $34.7B AUM 29.45% 1-Year Est. Return
VIA
Vanguard Investments Australia Victoria, Australia $34.6B AUM
Alyeska Investment Group
Alyeska Investment Group Chicago, Illinois $35.4B AUM 33.54% 1-Year Est. Return
Pacer Advisors
Pacer Advisors Malvern, Pennsylvania $35.6B AUM 18.19% 1-Year Est. Return
Kayne Anderson Rudnick Investment Management
Kayne Anderson Rudnick Investment Management Los Angeles, California $34B AUM 6.31% 1-Year Est. Return
Viking Global Investors
Viking Global Investors Stamford, Connecticut $35.7B AUM 21.3% 1-Year Est. Return
MML Investors Services
MML Investors Services Springfield, Massachusetts $36.1B AUM 19.68% 1-Year Est. Return

William Blair & Company's Q3 2019 Portfolio in Review

As of Q3 2019, William Blair & Company held 1,807 positions worth $17.4B, down 0.77% from $17.5B the previous quarter. Its ten largest holdings account for 22% of the portfolio.

William Blair & Company's Q3 2019 filing shows 76 new, 584 increased, 700 reduced and 110 closed positions. Its largest new stake was Blackstone: 629,283 shares worth $30.7M. The largest sale was Netflix, an estimated $45.9M.

By sector, the portfolio is most concentrated in Technology at 23% of assets, up from 23% a quarter earlier, followed by Healthcare and Financials.

  • William Blair & Company's largest Q3 2019 buy was Blackstone: 629,283 shares worth $30.7M.
  • William Blair & Company added most to Walt Disney in Q3 2019, an estimated $38.7M increase.
  • William Blair & Company's biggest Q3 2019 reduction was Netflix, cutting an estimated $45.9M.
  • William Blair & Company fully exited Worldpay, Inc. in Q3 2019, selling an estimated $9.57M.
  • William Blair & Company's ten largest holdings make up 22% of its $17.4B portfolio in Q3 2019.
  • William Blair & Company opened 76 new positions and closed 110 in Q3 2019.
  • William Blair & Company's portfolio value fell 0.77% quarter-over-quarter to $17.4B.

Based on William Blair & Company's 13F filing for Q3 2019, filed 12 Nov 2019.

Product
Portfolios Fund Managers Fund Trends Large Buys & Sells Stocks ETFs Sectors Industries Rankings
Popular funds
Jane Street Citadel Renaissance Situational Awareness Coatue Bridgewater Berkshire Appaloosa Pershing Square
Resources
API Docs Plans Learn Methodology
Policies
Terms & Conditions Privacy Policy Disclaimer Climate Commitment
Connect
Contact Us About X (Twitter) LinkedIn

© 2026 Wall St. Rank

Sign up Sign in
Common Fund Bets See what stocks and ETFs funds are collectively bullish/bearish on Largest Fund Trades Explore the largest stock and ETF buys and sells made by funds High Conviction Trades Discover high conviction trades that caused a significant change in a fund's stake in a stock Fund Manager Portfolios Gain insights from the world’s largest funds and super investors
Fund Manager Index Stock index based on fund manager consensus updated each quarter

Theme