William Blair & Company
MDYG icon

William Blair & Company’s State Street SPDR S&P 400 Mid Cap Growth ETF MDYG Stock Holding History

William Blair & Company’s Portfolio MDYG Stock Details MDYG Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$576K Buy
6,001
+387
+7% +$37.9K ﹤0.01% 1105
2025
Q4 		$519K Buy
5,614
+130
+2% +$11.9K ﹤0.01% 1135
2025
Q3 		$502K Buy
5,484
+9
+0.2% +$809 ﹤0.01% 1116
2025
Q2 		$476K Buy
5,475
+15
+0.3% +$1.23K ﹤0.01% 1097
2025
Q1 		$434K Buy
5,460
+106
+2% +$9.12K ﹤0.01% 1124
2024
Q4 		$465K Sell
5,354
-185
-3% -$16.6K ﹤0.01% 1119
2024
Q3 		$486K Buy
5,539
+3,245
+141% +$277K ﹤0.01% 1118
2024
Q2 		$193K Buy
2,294
+2,050
+840% +$173K ﹤0.01% 1420
2024
Q1 		$21.3K Buy
244
+40
+20% +$3.19K ﹤0.01% 1676
2023
Q4 		$15.4K Sell
204
-67
-25% -$4.7K ﹤0.01% 1683
2023
Q3 		$18.7K Hold
271
– – ﹤0.01% 1683
2023
Q2 		$19.4K Sell
271
-240
-47% -$16.4K ﹤0.01% 1696
2023
Q1 		$35K Sell
511
-775
-60% -$52.9K ﹤0.01% 1630
2022
Q4 		$84K Buy
1,286
+592
+85% +$38.9K ﹤0.01% 1511
2022
Q3 		$42K Buy
694
+204
+42% +$13.5K ﹤0.01% 1621
2022
Q2 		$30K Hold
490
– – ﹤0.01% 1685
2022
Q1 		$36K Sell
490
-320
-40% -$23.7K ﹤0.01% 1749
2021
Q4 		$66K Sell
810
-308
-28% -$24.7K ﹤0.01% 1742
2021
Q3 		$85K Hold
1,118
– – ﹤0.01% 1633
2021
Q2 		$87K Sell
1,118
-123
-10% -$9.47K ﹤0.01% 1630
2021
Q1 		$93K Buy
1,241
+223
+22% +$16.5K ﹤0.01% 1604
2020
Q4 		$71K Sell
1,018
-57
-5% -$3.65K ﹤0.01% 1585
2020
Q3 		$62K Buy
1,075
+1,018
+1,786% +$58.1K ﹤0.01% 1481
2020
Q2 		$3K Sell
57
-843
-94% -$42K ﹤0.01% 1638
2020
Q1 		$39K Hold
900
– – ﹤0.01% 1418
2019
Q4 		$51K Hold
900
– – ﹤0.01% 1483
2019
Q3 		$48K Hold
900
– – ﹤0.01% 1460
2019
Q2 		$49K Hold
900
– – ﹤0.01% 1499
2019
Q1 		$47K Sell
900
-62
-6% -$3.14K ﹤0.01% 1477
2018
Q4 		$44K Sell
962
-5
-0.5% -$251 ﹤0.01% 1407
2018
Q3 		$54K Buy
967
+67
+7% +$3.74K ﹤0.01% 1455
2018
Q2 		$49K Hold
900
– – ﹤0.01% 1420
2018
Q1 		$47K Buy
+900
New +$47.8K ﹤0.01% 1349

Other funds holding MDYG

LPL Financial
LPL Financial San Diego, California $445B AUM 25.58% 1-Year Est. Return
Financial Engines Advisors
Financial Engines Advisors Santa Clara, California $49.2B AUM 14.31% 1-Year Est. Return
AWM
AE Wealth Management Topeka, Kansas $21.5B AUM 26.98% 1-Year Est. Return
NP
NorthRock Partners Minneapolis, Minnesota $6.2B AUM 15.8% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return
CF
Convergence Financial Columbia, Missouri $1.26B AUM 24.35% 1-Year Est. Return
FWP
FAS Wealth Partners Leawood, Kansas $1.92B AUM 26.86% 1-Year Est. Return
Raymond James Financial
Raymond James Financial St Petersburg, Florida $324B AUM 22.36% 1-Year Est. Return
Envestnet Asset Management
Envestnet Asset Management Chicago, Illinois $424B AUM 22.96% 1-Year Est. Return
PAG
Private Advisor Group Morristown, New Jersey $21.8B AUM 28.57% 1-Year Est. Return

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

William Blair & Company increased its State Street SPDR S&P 400 Mid Cap Growth ETF (MDYG) stake by 6.9% in Q1 2026, buying an estimated $37.9K and bringing the position to 6,001 shares worth $576K. The position accounts for ﹤0.01% of the portfolio, ranked #1105.

William Blair & Company first reported a position in MDYG in Q1 2018 and has held it in 33 quarters since. 397 funds tracked by Wall St. Rank hold MDYG as of Q1 2026.

  • William Blair & Company held 6,001 shares of State Street SPDR S&P 400 Mid Cap Growth ETF worth $576K as of Q1 2026.
  • William Blair & Company bought 387 State Street SPDR S&P 400 Mid Cap Growth ETF shares in Q1 2026, an estimated $37.9K.
  • State Street SPDR S&P 400 Mid Cap Growth ETF made up ﹤0.01% of William Blair & Company's portfolio in Q1 2026, its #1105 holding.
  • William Blair & Company first reported a position in State Street SPDR S&P 400 Mid Cap Growth ETF in Q1 2018 and has held it in 33 quarters since.
  • 397 funds tracked by Wall St. Rank held State Street SPDR S&P 400 Mid Cap Growth ETF as of Q1 2026.

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