William Blair & Company’s State Street SPDR S&P MIDCAP 400 ETF Trust MDY Stock Holding History

Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake
Trade Value Portfolio Weight Portfolio Position
2026
Q2
$53.5M Buy
76,091
+414
+0.5% +$277K 0.14% 142
2026
Q1
$46.7M Buy
75,677
+309
+0.4% +$196K 0.13% 149
2025
Q4
$45.5M Sell
75,368
-1,733
-2% -$1.04M 0.12% 147
2025
Q3
$46M Sell
77,101
-1,265
-2% -$742K 0.12% 150
2025
Q2
$44.4M Buy
78,366
+2,685
+4% +$1.44M 0.12% 151
2025
Q1
$40.4M Buy
75,681
+6,561
+9% +$3.72M 0.12% 158
2024
Q4
$39.4M Sell
69,120
-359
-0.5% -$210K 0.11% 158
2024
Q3
$39.6M Buy
69,479
+1,050
+2% +$578K 0.12% 151
2024
Q2
$36.6M Buy
68,429
+1,661
+2% +$893K 0.11% 150
2024
Q1
$37.1M Buy
66,768
+2,659
+4% +$1.38M 0.12% 145
2023
Q4
$32.5M Sell
64,109
-2,435
-4% -$1.13M 0.11% 156
2023
Q3
$30.4M Sell
66,544
-1,230
-2% -$589K 0.12% 155
2023
Q2
$32.5M Sell
67,774
-5,422
-7% -$2.47M 0.12% 154
2023
Q1
$33.6M Sell
73,196
-5,829
-7% -$2.72M 0.13% 144
2022
Q4
$35M Sell
79,025
-2,230
-3% -$986K 0.15% 132
2022
Q3
$32.6M Buy
81,255
+4,570
+6% +$2.02M 0.15% 136
2022
Q2
$31.7M Buy
76,685
+3,632
+5% +$1.64M 0.14% 144
2022
Q1
$35.8M Buy
73,053
+6,482
+10% +$3.15M 0.13% 165
2021
Q4
$34.5M Buy
66,571
+2,506
+4% +$1.27M 0.11% 171
2021
Q3
$30.8M Buy
64,065
+1,835
+3% +$901K 0.1% 171
2021
Q2
$30.6M Buy
62,230
+6,380
+11% +$3.15M 0.11% 174
2021
Q1
$26.6M Buy
55,850
+886
+2% +$404K 0.1% 180
2020
Q4
$23.1M Buy
54,964
+5,166
+10% +$1.99M 0.08% 200
2020
Q3
$16.9M Sell
49,798
-3,166
-6% -$1.08M 0.07% 208
2020
Q2
$17.2M Sell
52,964
-18,831
-26% -$5.71M 0.08% 199
2020
Q1
$18.9M Sell
71,795
-13,386
-16% -$4.54M 0.12% 163
2019
Q4
$32M Buy
85,181
+13,893
+19% +$5.02M 0.16% 136
2019
Q3
$25.1M Buy
71,288
+6,606
+10% +$2.31M 0.14% 147
2019
Q2
$22.9M Buy
64,682
+10,845
+20% +$3.79M 0.13% 157
2019
Q1
$18.6M Buy
53,837
+15,010
+39% +$5.05M 0.11% 177
2018
Q4
$11.8M Sell
38,827
-23,162
-37% -$7.71M 0.09% 216
2018
Q3
$22.8M Buy
61,989
+38,886
+168% +$14.2M 0.14% 157
2018
Q2
$8.2M Buy
23,103
+7,761
+51% +$2.73M 0.06% 268
2018
Q1
$5.24M Sell
15,342
-1,585
-9% -$552K 0.04% 336
2017
Q4
$5.85M Buy
16,927
+431
+3% +$145K 0.04% 325
2017
Q3
$5.38M Buy
16,496
+205
+1% +$65.2K 0.04% 321
2017
Q2
$5.17M Sell
16,291
-1,182
-7% -$372K 0.04% 333
2017
Q1
$5.49M Buy
17,473
+2,132
+14% +$662K 0.04% 303
2016
Q4
$4.63M Buy
15,341
+1,323
+9% +$382K 0.04% 319
2016
Q3
$3.96M Buy
14,018
+933
+7% +$263K 0.04% 351
2016
Q2
$3.56M Buy
13,085
+3
+0% +$802 0.03% 352
2016
Q1
$3.44M Buy
13,082
+1,240
+10% +$302K 0.03% 343
2015
Q4
$3.01M Buy
11,842
+2,053
+21% +$534K 0.03% 380
2015
Q3
$2.44M Sell
9,789
-115
-1% -$30.5K 0.02% 484
2015
Q2
$2.71M Buy
9,904
+130
+1% +$36.1K ﹤0.01% 1247
2015
Q1
$2.71M Sell
9,774
-50
-0.5% -$13.5K ﹤0.01% 1207
2014
Q4
$2.59M Buy
9,824
+1,015
+12% +$260K ﹤0.01% 1217
2014
Q3
$2.2M Sell
8,809
-150
-2% -$38.5K ﹤0.01% 1230
2014
Q2
$2.33M Buy
8,959
+210
+2% +$52.6K ﹤0.01% 1205
2014
Q1
$2.19M Buy
8,749
+25
+0.3% +$6.13K ﹤0.01% 1174
2013
Q4
$2.13M Buy
8,724
+180
+2% +$42.3K ﹤0.01% 1157
2013
Q3
$1.93M Buy
8,544
+595
+7% +$132K ﹤0.01% 1151
2013
Q2
$1.67M Buy
+7,949
New +$1.68M ﹤0.01% 1125

Other funds holding MDY

William Blair & Company's MDY Position: Q2 2026 in Review

William Blair & Company increased its State Street SPDR S&P MIDCAP 400 ETF Trust (MDY) stake by 0.55% in Q2 2026, buying an estimated $277K and bringing the position to 76,091 shares worth $53.5M. The position accounts for 0.14% of the portfolio, ranked #142.

William Blair & Company first reported a position in MDY in Q2 2013 and has held it in 53 quarters since. 1,531 funds tracked by Wall St. Rank hold MDY as of Q2 2026.

  • William Blair & Company held 76,091 shares of State Street SPDR S&P MIDCAP 400 ETF Trust worth $53.5M as of Q2 2026.
  • William Blair & Company bought 414 State Street SPDR S&P MIDCAP 400 ETF Trust shares in Q2 2026, an estimated $277K.
  • State Street SPDR S&P MIDCAP 400 ETF Trust made up 0.14% of William Blair & Company's portfolio in Q2 2026, its #142 holding.
  • William Blair & Company first reported a position in State Street SPDR S&P MIDCAP 400 ETF Trust in Q2 2013 and has held it in 53 quarters since.
  • 1,531 funds tracked by Wall St. Rank held State Street SPDR S&P MIDCAP 400 ETF Trust as of Q2 2026.

Based on William Blair & Company's 13F filing for Q2 2026, filed 11 Aug 2026.