William Blair & Company
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William Blair & Company’s Aecom ACM Stock Holding History

William Blair & Company’s Portfolio ACM Stock Details ACM Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$281K Buy
+4,031
New +$309K ﹤0.01% 1447
2026
Q1 		– Sell
-5,153
Closed -$491K – 1924
2025
Q4 		$491K Sell
5,153
-8,182
-61% -$962K ﹤0.01% 1155
2025
Q3 		$1.74M Buy
13,335
+9,379
+237% +$1.13M ﹤0.01% 765
2025
Q2 		$446K Buy
+3,956
New +$411K ﹤0.01% 1124

Other funds holding ACM

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Primecap Management
Primecap Management Pasadena, California $169B AUM 114.72% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Barrow, Hanley, Mewhinney & Strauss
Barrow, Hanley, Mewhinney & Strauss Dallas, Texas $33B AUM 40.62% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
UBS AM
UBS AM Chicago, Illinois $550B AUM 43.33% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

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

William Blair & Company opened a new position in Aecom (ACM) in Q2 2026: 4,031 shares worth $281K. The stake represents ﹤0.01% of the portfolio and ranks #1447 among its holdings. This is a return to the name: William Blair & Company previously reported a position in ACM as recently as Q4 2025.

William Blair & Company first reported a position in ACM in Q2 2025 and has held it in 4 quarters since. The position peaked at $1.74M in Q3 2025. 574 funds tracked by Wall St. Rank hold ACM as of Q2 2026.

  • William Blair & Company held 4,031 shares of Aecom worth $281K as of Q2 2026.
  • Aecom was a new William Blair & Company position in Q2 2026.
  • Aecom made up ﹤0.01% of William Blair & Company's portfolio in Q2 2026, its #1447 holding.
  • William Blair & Company first reported a position in Aecom in Q2 2025 and has held it in 4 quarters since.
  • William Blair & Company's Aecom position peaked at $1.74M in Q3 2025.
  • 574 funds tracked by Wall St. Rank held Aecom as of Q2 2026.

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