0001752724-23-029946.txt : 20230221
0001752724-23-029946.hdr.sgml : 20230221
20230221091226
ACCESSION NUMBER: 0001752724-23-029946
CONFORMED SUBMISSION TYPE: NPORT-P
PUBLIC DOCUMENT COUNT: 1
CONFORMED PERIOD OF REPORT: 20221231
FILED AS OF DATE: 20230221
DATE AS OF CHANGE: 20230221
PERIOD START: 20221231
FILER:
COMPANY DATA:
COMPANY CONFORMED NAME: WILLIAM BLAIR FUNDS
CENTRAL INDEX KEY: 0000822632
IRS NUMBER: 000000000
FISCAL YEAR END: 1231
FILING VALUES:
FORM TYPE: NPORT-P
SEC ACT: 1940 Act
SEC FILE NUMBER: 811-05344
FILM NUMBER: 23645615
BUSINESS ADDRESS:
STREET 1: 150 NORTH RIVERSIDE PLAZA
CITY: CHICAGO
STATE: IL
ZIP: 60606
BUSINESS PHONE: 3123648000
MAIL ADDRESS:
STREET 1: 150 NORTH RIVERSIDE PLAZA
CITY: CHICAGO
STATE: IL
ZIP: 60606
FORMER COMPANY:
FORMER CONFORMED NAME: WILLIAM BLAIR MUTUAL FUNDS INC
DATE OF NAME CHANGE: 19960112
FORMER COMPANY:
FORMER CONFORMED NAME: BLAIR WILLIAM READY RESERVES INC
DATE OF NAME CHANGE: 19920316
0000822632
S000010050
William Blair Mid Cap Growth Fund
C000027836
Class N
WCGNX
C000027837
Class I
WCGIX
C000211724
Class R6
WCGJX
NPORT-P
1
primary_doc.xml
NPORT-P
false
0000822632
XXXXXXXX
S000010050
C000027836
C000027837
C000211724
WILLIAM BLAIR FUNDS
811-05344
0000822632
SNQR0U5FDV8EZZX4W051
150 NORTH RIVERSIDE PLAZA
CHICAGO
60606
312-364-8000
William Blair Mid Cap Growth Fund
S000010050
549300N1VIU42BB76F73
2022-12-31
2022-12-31
N
32581438.88
70212.36
32511226.52
0.00000000
0.00000000
0.00000000
0.00000000
0.00000000
0.00000000
0.00000000
0.00000000
0.00000000
0.00000000
0.00000000
0.00000000
0.00000000
0.00000000
N
Charles River Laboratories International Inc
549300BSQ0R4UZ5KX287
Charles River Laboratories International Inc
159864107
2300.00000000
NS
USD
501170.00000000
1.541529045948
Long
EC
CORP
US
N
1
N
N
N
Pure Storage Inc
549300NPDB0BZTK3WO90
Pure Storage Inc
74624M102
28910.00000000
NS
USD
773631.60000000
2.379582940446
Long
EC
CORP
US
N
1
N
N
N
EPAM Systems Inc
549300XCR4R530HJP604
EPAM Systems Inc
29414B104
1175.00000000
NS
USD
385094.50000000
1.184496991410
Long
EC
CORP
US
N
1
N
N
N
Dynatrace Inc
N/A
Dynatrace Inc
268150109
21010.00000000
NS
USD
804683.00000000
2.475092717603
Long
EC
CORP
US
N
1
N
N
N
Teledyne Technologies Inc
549300VSMO9KYQWDND94
Teledyne Technologies Inc
879360105
2680.00000000
NS
USD
1071758.80000000
3.296580642199
Long
EC
CORP
US
N
1
N
N
N
Chipotle Mexican Grill Inc
N/A
Chipotle Mexican Grill Inc
169656105
667.00000000
NS
USD
925455.83000000
2.846573104311
Long
EC
CORP
US
N
1
N
N
N
Pool Corp
5493005VZK1KMN6CO617
Pool Corp
73278L105
1800.00000000
NS
USD
544194.00000000
1.673864871462
Long
EC
CORP
US
N
1
N
N
N
Hess Corp
UASVRYNXNK17ULIGK870
Hess Corp
42809H107
6845.00000000
NS
USD
970757.90000000
2.985915955532
Long
EC
CORP
US
N
1
N
N
N
Agilent Technologies Inc
QUIX8Y7A2WP0XRMW7G29
Agilent Technologies Inc
00846U101
5970.00000000
NS
USD
893410.50000000
2.748006137050
Long
EC
CORP
US
N
1
N
N
N
Burlington Stores Inc
5299003Z37DVGKKC1W09
Burlington Stores Inc
122017106
4130.00000000
NS
USD
837398.80000000
2.575721957105
Long
EC
CORP
US
N
1
N
N
N
Fixed Income Clearing Corp
549300H47WTHXPU08X20
FIXED INC CLEARING CORP.REPO
000000000
1190830.67000000
PA
USD
1190830.67000000
3.662829113098
Long
RA
CORP
US
N
2
Repurchase
N
1.60000000
2023-01-03
838500.00000000
USD
1214712.72000000
USD
UST
N
N
N
Vulcan Materials Co
549300Q8LSNHAVWBNI21
Vulcan Materials Co
929160109
6675.00000000
NS
USD
1168859.25000000
3.595248088474
Long
EC
CORP
US
N
1
N
N
N
Crown Holdings Inc
NYLWZIOY8PUNIT4JOE22
Crown Holdings Inc
228368106
6230.00000000
NS
USD
512168.30000000
1.575358283345
Long
EC
CORP
US
N
1
N
N
N
CONTRA ABIOMED INC
N/A
CONTRA ABIOMED INC
003CVR016
1508.00000000
NS
USD
0.00000000
0.000000
Long
EC
CORP
US
N
3
N
N
N
Western Alliance Bancorp
5493003VJXZ5JXT9S762
Western Alliance Bancorp
957638109
8000.00000000
NS
USD
476480.00000000
1.465586048274
Long
EC
CORP
US
N
1
N
N
N
Align Technology Inc
549300N5YSE0U3LCP840
Align Technology Inc
016255101
1995.00000000
NS
USD
420745.50000000
1.294154496881
Long
EC
CORP
US
N
1
N
N
N
Veeva Systems Inc
549300YZEXPDB92M2F02
Veeva Systems Inc
922475108
6915.00000000
NS
USD
1115942.70000000
3.432484158398
Long
EC
CORP
US
N
1
N
N
N
Axon Enterprise Inc
549300QP2IEEGFE16681
Axon Enterprise Inc
05464C101
6235.00000000
NS
USD
1034573.55000000
3.182203997636
Long
EC
CORP
US
N
1
N
N
N
Coupa Software Inc
549300Q95ICR2GFL2K37
Coupa Software Inc
22266L106
5183.00000000
NS
USD
410338.11000000
1.262142816259
Long
EC
CORP
US
N
1
N
N
N
Take-Two Interactive Software Inc
BOMSTHHJK882EWYX3334
Take-Two Interactive Software Inc
874054109
3295.00000000
NS
USD
343108.35000000
1.055353447797
Long
EC
CORP
US
N
1
N
N
N
MongoDB Inc
549300TPTG69WKWE1Z37
MongoDB Inc
60937P106
2565.00000000
NS
USD
504894.60000000
1.552985396258
Long
EC
CORP
US
N
1
N
N
N
Ares Management Corp
529900JUV61FH7B8VW38
Ares Management Corp
03990B101
5585.00000000
NS
USD
382237.40000000
1.175708950152
Long
EC
CORP
US
N
1
N
N
N
Nice Ltd
254900YTY4EF5Z4W0A51
Nice Ltd
653656108
3610.00000000
NS
USD
694203.00000000
2.135271640929
Long
EC
CORP
IL
N
1
N
N
N
Guidewire Software Inc
549300WXSG0J8IXZCK32
Guidewire Software Inc
40171V100
3792.00000000
NS
USD
237227.52000000
0.729678776819
Long
EC
CORP
US
N
1
N
N
N
Etsy Inc
54930089Q7XT501AEA40
Etsy Inc
29786A106
4229.00000000
NS
USD
506549.62000000
1.558076007032
Long
EC
CORP
US
N
1
N
N
N
CoStar Group Inc
N/A
CoStar Group Inc
22160N109
15210.00000000
NS
USD
1175428.80000000
3.615455108335
Long
EC
CORP
US
N
1
N
N
N
BWX Technologies Inc
549300NP85N265KWMS58
BWX Technologies Inc
05605H100
19514.00000000
NS
USD
1133373.12000000
3.486097700136
Long
EC
CORP
US
N
1
N
N
N
Cadence Design Systems Inc
GCT7RXJOGLXPV0NXZY22
Cadence Design Systems Inc
127387108
6915.00000000
NS
USD
1110825.60000000
3.416744672233
Long
EC
CORP
US
N
1
N
N
N
SolarEdge Technologies Inc
5493000K6Y58XXPDF853
SolarEdge Technologies Inc
83417M104
2085.00000000
NS
USD
590617.95000000
1.816658469149
Long
EC
CORP
US
N
1
N
N
N
Cameco Corp
N4BHALMXL3GMZKCUON55
Cameco Corp
13321L108
24170.00000000
NS
USD
547933.90000000
1.685368282439
Long
EC
CORP
CA
N
1
N
N
N
Bright Horizons Family Solutions Inc
N/A
Bright Horizons Family Solutions Inc
109194100
4920.00000000
NS
USD
310452.00000000
0.954907068206
Long
EC
CORP
US
N
1
N
N
N
Clarivate PLC
549300WDHIIODXFO0R55
Clarivate PLC
000000000
56900.00000000
NS
USD
474546.00000000
1.459637333916
Long
EC
CORP
JE
N
1
N
N
N
SBA Communications Corp
5299001HX8ZN8Y8QIT49
SBA Communications Corp
78410G104
1840.00000000
NS
USD
515770.40000000
1.586437840733
Long
EC
US
N
1
N
N
N
Dexcom Inc
549300YSK3QDSFR5EU59
Dexcom Inc
252131107
8315.00000000
NS
USD
941590.60000000
2.896201407291
Long
EC
CORP
US
N
1
N
N
N
Warner Music Group Corp
N/A
Warner Music Group Corp
934550203
22325.00000000
NS
USD
781821.50000000
2.404773930995
Long
EC
CORP
US
N
1
N
N
N
Palo Alto Networks Inc
549300QXR2YVZV231H43
Palo Alto Networks Inc
697435105
3915.00000000
NS
USD
546299.10000000
1.680339865565
Long
EC
CORP
US
N
1
N
N
N
MKS Instruments Inc
549300KEQATBHAGVF505
MKS Instruments Inc
55306N104
6560.00000000
NS
USD
555828.80000000
1.709651894117
Long
EC
CORP
US
N
1
N
N
N
Euronet Worldwide Inc
YG3575C4DSHJPA5KET68
Euronet Worldwide Inc
298736109
9275.00000000
NS
USD
875374.50000000
2.692529915663
Long
EC
CORP
US
N
1
N
N
N
Live Nation Entertainment Inc
5493007B9BM9ZXJINO78
Live Nation Entertainment Inc
538034109
8171.00000000
NS
USD
569845.54000000
1.752765432117
Long
EC
CORP
US
N
1
N
N
N
Copart Inc
549300KVYX3JWMYEHU61
Copart Inc
217204106
18889.00000000
NS
USD
1150151.21000000
3.537704765744
Long
EC
CORP
US
N
1
N
N
N
New Fortress Energy Inc
N/A
New Fortress Energy Inc
644393100
17648.00000000
NS
USD
748628.16000000
2.302675845032
Long
EC
CORP
US
N
1
N
N
N
Builders FirstSource Inc
549300W0SKP6L3H7DP63
Builders FirstSource Inc
12008R107
10735.00000000
NS
USD
696486.80000000
2.142296291318
Long
EC
CORP
US
N
1
N
N
N
Mettler-Toledo International Inc
5493000BD5GJNUDIUG10
Mettler-Toledo International Inc
592688105
515.00000000
NS
USD
744406.75000000
2.289691376429
Long
EC
CORP
US
N
1
N
N
N
Performance Food Group Co
549300EUK8GR9IT1YK57
Performance Food Group Co
71377A103
9635.00000000
NS
USD
562587.65000000
1.730441174386
Long
EC
CORP
US
N
1
N
N
N
Aptiv PLC
N/A
Aptiv PLC
000000000
5145.00000000
NS
USD
479153.85000000
1.473810438081
Long
EC
CORP
JE
N
1
N
N
N
STERIS PLC
N/A
STERIS PLC
000000000
2025.00000000
NS
USD
373997.25000000
1.150363397609
Long
EC
CORP
IE
N
1
N
N
N
IDEXX Laboratories Inc
OGMTXK0LUU1HKV2P0J84
IDEXX Laboratories Inc
45168D104
1305.00000000
NS
USD
532387.80000000
1.637550646305
Long
EC
CORP
US
N
1
N
N
N
PacWest Bancorp
549300YI8VMFO7G36V04
PacWest Bancorp
695263103
12795.00000000
NS
USD
293645.25000000
0.903211848434
Long
EC
CORP
US
N
1
N
N
N
2023-01-19
WILLIAM BLAIR FUNDS
John Raczek
John Raczek
Principal Financial Officer