William Blair Investment Management
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William Blair Investment Management’s Constellium CSTM Stock Holding History

William Blair Investment Management’s Portfolio CSTM Stock Details CSTM Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$28.1M Sell
882,306
-35,784
-4% -$1.16M 0.08% 194
2026
Q1 		$22.6M Buy
+918,090
New +$21.8M 0.07% 243

Other funds holding CSTM

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
B
Bpifrance Maisons Alfort, Cedex, France $1.36B AUM 21.86% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
American Century Companies
American Century Companies Kansas City, Missouri $226B AUM 44.75% 1-Year Est. Return
T. Rowe Price Investment Management
T. Rowe Price Investment Management Baltimore, Maryland $153B AUM 38.14% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Arrowstreet Capital
Arrowstreet Capital Boston, Massachusetts $225B AUM 49.49% 1-Year Est. Return
Nuveen
Nuveen Charlotte, North Carolina $419B AUM 43.02% 1-Year Est. Return
KPM
Kinetic Partners Management Miami, Florida $4.19B AUM 61.52% 1-Year Est. Return

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

William Blair Investment Management reduced its Constellium (CSTM) stake by 3.9% in Q2 2026, selling an estimated $1.16M and leaving 882,306 shares worth $28.1M. The position accounts for 0.08% of the portfolio, ranked #194.

William Blair Investment Management first reported a position in CSTM in Q1 2026 and has held it in 2 quarters since. 388 funds tracked by Wall St. Rank hold CSTM as of Q2 2026.

  • William Blair Investment Management held 882,306 shares of Constellium worth $28.1M as of Q2 2026.
  • William Blair Investment Management sold 35,784 Constellium shares in Q2 2026, an estimated $1.16M.
  • Constellium made up 0.08% of William Blair Investment Management's portfolio in Q2 2026, its #194 holding.
  • William Blair Investment Management first reported a position in Constellium in Q1 2026 and has held it in 2 quarters since.
  • 388 funds tracked by Wall St. Rank held Constellium as of Q2 2026.

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