William Blair Investment Management
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William Blair Investment Management’s Mueller Industries MLI Stock Holding History

William Blair Investment Management’s Portfolio MLI Stock Details MLI Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$244M Sell
3,972,278
-247,180
-6% -$16.2M 0.73% 22
2026
Q1 		$234M Buy
4,219,458
+659,646
+19% +$39.6M 0.77% 18
2025
Q4 		$204M Sell
3,559,812
-429,938
-11% -$23.1M 0.57% 39
2025
Q3 		$202M Sell
3,989,750
-649,388
-14% -$29.8M 0.52% 48
2025
Q2 		$184M Sell
4,639,138
-72,804
-2% -$2.75M 0.49% 54
2025
Q1 		$179M Sell
4,711,942
-363,054
-7% -$14.5M 0.5% 52
2024
Q4 		$201M Buy
+5,074,996
New +$206M 0.49% 60

Other funds holding MLI

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
First Trust Advisors
First Trust Advisors Wheaton, Illinois $170B AUM 46.21% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
AQR Capital Management
AQR Capital Management Greenwich, Connecticut $287B AUM 42.33% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return

William Blair Investment Management's MLI Position: Q2 2026 in Review

William Blair Investment Management reduced its Mueller Industries (MLI) stake by 5.9% in Q2 2026, selling an estimated $16.2M and leaving 3,972,278 shares worth $244M. The position accounts for 0.73% of the portfolio, ranked #22.

William Blair Investment Management first reported a position in MLI in Q4 2024 and has held it in 7 quarters since. 738 funds tracked by Wall St. Rank hold MLI as of Q2 2026.

  • William Blair Investment Management held 3,972,278 shares of Mueller Industries worth $244M as of Q2 2026.
  • William Blair Investment Management sold 247,180 Mueller Industries shares in Q2 2026, an estimated $16.2M.
  • Mueller Industries made up 0.73% of William Blair Investment Management's portfolio in Q2 2026, its #22 holding.
  • William Blair Investment Management first reported a position in Mueller Industries in Q4 2024 and has held it in 7 quarters since.
  • 738 funds tracked by Wall St. Rank held Mueller Industries as of Q2 2026.

Based on William Blair Investment Management's 13F filing for Q2 2026, filed 12 Aug 2026.