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William Blair & Company Portfolio holdings
AUM
$38.4B
1-Year Est. Return
25.71%
This Fund
S&P 500
This Quarter
Est. Return
+2.39%
1 Year Est. Return
+25.71%
3 Year Est. Return
+88.7%
5 Year Est. Return
+104.53%
10 Year Est. Return
+665.86%
AUM
$26.5B
AUM Growth
-$769M
(-2.8%)
Cap. Flow
-$1.09B
Cap. Flow
% of AUM
-4.11%
Top 10 Holdings %
Top 10 Hldgs %
22.54%
Holding
1,941
New
123
Increased
715
Reduced
742
Closed
84
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
CarMax
KMX
|
+$73M |
| 2 |
OSH
Oak Street Health, Inc.
OSH
|
+$60.6M |
| 3 |
iRhythm Holdings
IRTC
|
+$51.2M |
| 4 |
DexCom
DXCM
|
+$39.4M |
| 5 |
Aon
AON
|
+$30.5M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$449M |
| 2 |
Vanguard Morningstar Growth ETF
VUG
|
+$271M |
| 3 |
Amazon
AMZN
|
+$157M |
| 4 |
Microsoft
MSFT
|
+$83.3M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$78.4M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 25.67% |
| 2 | Healthcare | 19.26% |
| 3 | Financials | 11.68% |
| 4 | Consumer Discretionary | 10.53% |
| 5 | Industrials | 9.66% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
326
Norfolk Southern
NSC
$75.3B
| $9.4M | 0.04% |
35,010
+391
| +1% | +$99K |
|
327
AppFolio
APPF
$6.97B
| $9.37M | 0.04% |
66,234
+164
| +0.2% | +$25.5K |
|
328
Airgain
AIRG
$69.3M
| $9.36M | 0.04% |
441,797
-171,968
| -28% | -$3.88M |
|
329
iShares Core S&P Small-Cap ETF
IJR
$112B
| $9.29M | 0.04% |
85,622
-6,821
| -7% | -$714K |
|
330
Baidu
BIDU
$35.6B
| $9.29M | 0.04% |
42,689
+326
| +0.8% | +$85.1K |
|
331
Ares Capital
ARCC
$14.3B
| $9.26M | 0.03% |
495,084
+5,984
| +1% | +$108K |
|
|
MMP
332
DELISTED
Magellan Midstream Partners, L.P.
MMP
| $9.22M | 0.03% |
212,661
-10,282
| -5% | -$450K |
|
333
Invesco Ultra Short Duration ETF
GSY
$3.88B
| $9.11M | 0.03% |
180,429
+3,744
| +2% | +$189K |
|
334
Virgin Galactic
SPCE
$500M
| $9.08M | 0.03% |
14,816
-700
| -5% | -$527K |
|
335
State Street Technology Select Sector SPDR ETF
XLK
$124B
| $9.07M | 0.03% |
136,518
+2,948
| +2% | +$195K |
|
336
State Street SPDR S&P Dividend ETF
SDY
$22.1B
| $8.98M | 0.03% |
76,080
+2,052
| +3% | +$230K |
|
337
Global X US Infrastructure Development ETF
PAVE
$14.3B
| $8.96M | 0.03% |
357,365
+187,780
| +111% | +$4.32M |
|
338
Vanguard Morningstar Small-Cap Growth ETF
VBK
$24.8B
| $8.93M | 0.03% |
32,499
-179,509
| -85% | -$50.6M |
|
339
Advanced Micro Devices
AMD
$788B
| $8.92M | 0.03% |
113,673
+10,480
| +10% | +$902K |
|
340
Lyft
LYFT
$6.28B
| $8.89M | 0.03% |
140,697
+57,810
| +70% | +$3.23M |
|
341
Xylem
XYL
$28.5B
| $8.84M | 0.03% |
84,017
-5,816
| -6% | -$590K |
|
342
Ball Corp
BALL
$16.4B
| $8.82M | 0.03% |
104,128
+31,981
| +44% | +$2.8M |
|
343
iShares Core S&P US Growth ETF
IUSG
$33.7B
| $8.72M | 0.03% |
96,024
+2,657
| +3% | +$239K |
|
|
PFPT
344
DELISTED
Proofpoint, Inc.
PFPT
| $8.7M | 0.03% |
69,185
+2,142
| +3% | +$279K |
|
345
Moody's
MCO
$82.8B
| $8.7M | 0.03% |
29,139
-361
| -1% | -$102K |
|
346
State Street Health Care Select Sector SPDR ETF
XLV
$44B
| $8.69M | 0.03% |
74,398
+5,461
| +8% | +$630K |
|
347
EPAM Systems
EPAM
$5.17B
| $8.68M | 0.03% |
21,869
-443
| -2% | -$162K |
|
348
Markel Group
MKL
$22.8B
| $8.66M | 0.03% |
7,599
+6,225
| +453% | +$6.71M |
|
349
Lockheed Martin
LMT
$140B
| $8.63M | 0.03% |
23,358
-14,575
| -38% | -$5M |
|
350
Rush Street Interactive
RSI
$2.81B
| $8.63M | 0.03% |
528,102
+372,017
| +238% | +$7.17M |
|
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William Blair & Company's Q1 2021 Portfolio in Review
As of Q1 2021, William Blair & Company held 1,941 positions worth $26.5B, down 2.8% from $27.3B the previous quarter. Its ten largest holdings account for 23% of the portfolio.
William Blair & Company withdrew a net $1.09B in Q1 2021, closing 84 positions and reducing 742 holdings. Its most notable exit was HMS Holdings Corp., an estimated $7.64M position sold in full.
By sector, the portfolio is most concentrated in Technology at 26% of assets, down from 28% a quarter earlier, followed by Healthcare and Financials.
Against the trend, William Blair & Company opened a new position in Oak Street Health, Inc. worth $59.1M.
- William Blair & Company's largest Q1 2021 buy was Oak Street Health, Inc.: 1,089,318 shares worth $59.1M.
- William Blair & Company added most to CarMax in Q1 2021, an estimated $73M increase.
- William Blair & Company's biggest Q1 2021 reduction was Apple, cutting an estimated $449M.
- William Blair & Company fully exited HMS Holdings Corp. in Q1 2021, selling an estimated $7.64M.
- William Blair & Company's ten largest holdings make up 23% of its $26.5B portfolio in Q1 2021.
- William Blair & Company opened 123 new positions and closed 84 in Q1 2021.
- William Blair & Company's portfolio value fell 2.8% quarter-over-quarter to $26.5B.
Based on William Blair & Company's 13F filing for Q1 2021, filed 13 May 2021.