William Blair & Company
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William Blair & Company’s Ceco Environmental CECO Stock Holding History

William Blair & Company’s Portfolio CECO Stock Details CECO Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2017
Q3 		– Sell
-500
Closed -$5K – 1385
2017
Q2 		$5K Buy
+500
New +$5.04K ﹤0.01% 1606

Other funds holding CECO

Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
T. Rowe Price Investment Management
T. Rowe Price Investment Management Baltimore, Maryland $153B AUM 38.14% 1-Year Est. Return
American Century Companies
American Century Companies Kansas City, Missouri $226B AUM 44.75% 1-Year Est. Return
DCM
Driehaus Capital Management Chicago, Illinois $17.3B AUM 211.34% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
DSCM
Divisadero Street Capital Management Miami, Florida $4.41B AUM 90.53% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

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

William Blair & Company opened a new position in Ceco Environmental (CECO) in Q2 2026: 2,317 shares worth $210K. The stake represents ﹤0.01% of the portfolio and ranks #1558 among its holdings. This is a return to the name: William Blair & Company previously reported a position in CECO as recently as Q3 2017.

William Blair & Company first reported a position in CECO in Q2 2015 and has held it in 9 quarters since. The position peaked at $1.76M in Q1 2017. 343 funds tracked by Wall St. Rank hold CECO as of Q2 2026.

  • William Blair & Company held 2,317 shares of Ceco Environmental worth $210K as of Q2 2026.
  • Ceco Environmental was a new William Blair & Company position in Q2 2026.
  • Ceco Environmental made up ﹤0.01% of William Blair & Company's portfolio in Q2 2026, its #1558 holding.
  • William Blair & Company first reported a position in Ceco Environmental in Q2 2015 and has held it in 9 quarters since.
  • William Blair & Company's Ceco Environmental position peaked at $1.76M in Q1 2017.
  • 343 funds tracked by Wall St. Rank held Ceco Environmental as of Q2 2026.

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