William Blair & Company
FIX icon

William Blair & Company’s Comfort Systems FIX Stock Holding History

William Blair & Company’s Portfolio FIX Stock Details FIX Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$6.4M Buy
3,231
+2,456
+317% +$4.46M 0.02% 468
2026
Q1 		$1.07M Buy
775
+98
+14% +$124K ﹤0.01% 921
2025
Q4 		$631K Sell
677
-229
-25% -$211K ﹤0.01% 1064
2025
Q3 		$747K Sell
906
-394
-30% -$267K ﹤0.01% 992
2025
Q2 		$697K Buy
+1,300
New +$566K ﹤0.01% 993

Other funds holding FIX

BlackRock
BlackRock New York $6.73T AUM 46.02% 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
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 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
AQR Capital Management
AQR Capital Management Greenwich, Connecticut $287B AUM 42.33% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return
Capital World Investors
Capital World Investors Los Angeles, California $846B AUM 46.74% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return

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

William Blair & Company increased its Comfort Systems (FIX) stake by 317% in Q2 2026, buying an estimated $4.46M and bringing the position to 3,231 shares worth $6.4M. The position accounts for 0.02% of the portfolio, ranked #468.

William Blair & Company first reported a position in FIX in Q2 2025 and has held it in 5 quarters since. 1,351 funds tracked by Wall St. Rank hold FIX as of Q2 2026.

  • William Blair & Company held 3,231 shares of Comfort Systems worth $6.4M as of Q2 2026.
  • William Blair & Company bought 2,456 Comfort Systems shares in Q2 2026, an estimated $4.46M.
  • Comfort Systems made up 0.02% of William Blair & Company's portfolio in Q2 2026, its #468 holding.
  • William Blair & Company first reported a position in Comfort Systems in Q2 2025 and has held it in 5 quarters since.
  • 1,351 funds tracked by Wall St. Rank held Comfort Systems as of Q2 2026.

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