William Blair & Company
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William Blair & Company’s State Street SPDR Bloomberg Convertible Securities ETF CWB Stock Holding History

William Blair & Company’s Portfolio CWB Stock Details CWB Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$2.2M Sell
24,004
-25,548
-52% -$2.39M 0.01% 707
2025
Q4 		$4.42M Buy
49,552
+5,575
+13% +$507K 0.01% 554
2025
Q3 		$3.98M Buy
43,977
+19,701
+81% +$1.69M 0.01% 577
2025
Q2 		$2.01M Sell
24,276
-9,012
-27% -$708K 0.01% 713
2025
Q1 		$2.55M Buy
33,288
+411
+1% +$32.5K 0.01% 658
2024
Q4 		$2.56M Buy
32,877
+285
+0.9% +$22.5K 0.01% 664
2024
Q3 		$2.5M Sell
32,592
-159
-0.5% -$11.7K 0.01% 650
2024
Q2 		$2.36M Sell
32,751
-133
-0.4% -$9.52K 0.01% 650
2024
Q1 		$2.4M Sell
32,884
-462
-1% -$33.1K 0.01% 631
2023
Q4 		$2.41M Buy
33,346
+401
+1% +$27.2K 0.01% 629
2023
Q3 		$2.23M Sell
32,945
-4,971
-13% -$347K 0.01% 626
2023
Q2 		$2.65M Sell
37,916
-3,345
-8% -$225K 0.01% 604
2023
Q1 		$2.77M Sell
41,261
-11,685
-22% -$783K 0.01% 585
2022
Q4 		$3.41M Buy
52,946
+3,005
+6% +$196K 0.01% 511
2022
Q3 		$3.16M Buy
49,941
+4,149
+9% +$279K 0.01% 521
2022
Q2 		$2.96M Buy
45,792
+556
+1% +$38.6K 0.01% 538
2022
Q1 		$3.48M Sell
45,236
-727
-2% -$55.6K 0.01% 556
2021
Q4 		$3.81M Buy
45,963
+1,278
+3% +$109K 0.01% 556
2021
Q3 		$3.81M Buy
44,685
+1,753
+4% +$151K 0.01% 519
2021
Q2 		$3.72M Buy
42,932
+285
+0.7% +$24.1K 0.01% 533
2021
Q1 		$3.56M Buy
42,647
+1,913
+5% +$165K 0.01% 530
2020
Q4 		$3.37M Buy
40,734
+12,262
+43% +$925K 0.01% 525
2020
Q3 		$1.96M Buy
28,472
+21,795
+326% +$1.45M 0.01% 588
2020
Q2 		$404K Sell
6,677
-115
-2% -$6.3K ﹤0.01% 999
2020
Q1 		$325K Sell
6,792
-10,914
-62% -$594K ﹤0.01% 992
2019
Q4 		$983K Buy
17,706
+730
+4% +$39.3K 0.01% 785
2019
Q3 		$890K Buy
16,976
+2,089
+14% +$111K 0.01% 786
2019
Q2 		$787K Sell
14,887
-124
-0.8% -$6.49K ﹤0.01% 829
2019
Q1 		$784K Buy
15,011
+158
+1% +$8.01K ﹤0.01% 813
2018
Q4 		$695K Buy
14,853
+1,131
+8% +$56.9K 0.01% 804
2018
Q3 		$740K Buy
13,722
+1,013
+8% +$54.3K ﹤0.01% 835
2018
Q2 		$674K Buy
12,709
+1,245
+11% +$65.7K ﹤0.01% 843
2018
Q1 		$592K Buy
11,464
+199
+2% +$10.4K ﹤0.01% 869
2017
Q4 		$570K Sell
11,265
-2,282
-17% -$117K ﹤0.01% 920
2017
Q3 		$692K Buy
13,547
+1,403
+12% +$71K 0.01% 826
2017
Q2 		$603K Sell
12,144
-7,710
-39% -$378K ﹤0.01% 916
2017
Q1 		$950K Buy
19,854
+1,885
+10% +$89.2K 0.01% 721
2016
Q4 		$820K Sell
17,969
-1,867
-9% -$85.2K 0.01% 690
2016
Q3 		$920K Buy
19,836
+2,129
+12% +$97.1K 0.01% 669
2016
Q2 		$776K Buy
+17,707
New +$768K 0.01% 699

Other funds holding CWB

Bank of America
Bank of America Charlotte, North Carolina $1.37T AUM 24.88% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return
Wells Fargo
Wells Fargo San Francisco, California $530B AUM 22.01% 1-Year Est. Return
LPL Financial
LPL Financial San Diego, California $377B AUM 19.32% 1-Year Est. Return
Bessemer Group
Bessemer Group Woodbridge, New Jersey $63.6B AUM 28.76% 1-Year Est. Return
Northwestern Mutual Wealth Management
Northwestern Mutual Wealth Management Milwaukee, Wisconsin $162B AUM 16.35% 1-Year Est. Return
AssetMark Inc
AssetMark Inc Concord, California $58.2B AUM 22.78% 1-Year Est. Return
Ameriprise
Ameriprise Minneapolis, Minnesota $432B AUM 30.22% 1-Year Est. Return
PNC Financial Services Group
PNC Financial Services Group Pittsburgh, Pennsylvania $173B AUM 20.72% 1-Year Est. Return
Deutsche Bank
Deutsche Bank Frankfurt Am Main Ge, Germany $303B AUM 30.15% 1-Year Est. Return

William Blair & Company's CWB Position: Q1 2026 in Review

William Blair & Company reduced its State Street SPDR Bloomberg Convertible Securities ETF (CWB) stake by 52% in Q1 2026, selling an estimated $2.39M and leaving 24,004 shares worth $2.2M. The position accounts for 0.01% of the portfolio, ranked #707.

William Blair & Company first reported a position in CWB in Q2 2016 and has held it in 40 quarters since. The position peaked at $4.42M in Q4 2025. 524 funds tracked by Wall St. Rank hold CWB as of Q1 2026.

  • William Blair & Company held 24,004 shares of State Street SPDR Bloomberg Convertible Securities ETF worth $2.2M as of Q1 2026.
  • William Blair & Company sold 25,548 State Street SPDR Bloomberg Convertible Securities ETF shares in Q1 2026, an estimated $2.39M.
  • State Street SPDR Bloomberg Convertible Securities ETF made up 0.01% of William Blair & Company's portfolio in Q1 2026, its #707 holding.
  • William Blair & Company first reported a position in State Street SPDR Bloomberg Convertible Securities ETF in Q2 2016 and has held it in 40 quarters since.
  • William Blair & Company's State Street SPDR Bloomberg Convertible Securities ETF position peaked at $4.42M in Q4 2025.
  • 524 funds tracked by Wall St. Rank held State Street SPDR Bloomberg Convertible Securities ETF as of Q1 2026.

Based on William Blair & Company's 13F filing for Q1 2026, filed 8 May 2026.