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
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 $5.72T AUM 30.48% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
AQR Capital Management
AQR Capital Management Greenwich, Connecticut $218B AUM 29.41% 1-Year Est. Return
Capital World Investors
Capital World Investors Los Angeles, California $733B AUM 35.63% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return
Westfield Capital Management
Westfield Capital Management Boston, Massachusetts $23.8B AUM 49.45% 1-Year Est. Return

William Blair & Company's FIX Position: Q1 2026 in Review

William Blair & Company increased its Comfort Systems (FIX) stake by 14% in Q1 2026, buying an estimated $124K and bringing the position to 775 shares worth $1.07M. The position accounts for ﹤0.01% of the portfolio, ranked #921.

William Blair & Company first reported a position in FIX in Q2 2025 and has held it in 4 quarters since. 1,196 funds tracked by Wall St. Rank hold FIX as of Q1 2026.

  • William Blair & Company held 775 shares of Comfort Systems worth $1.07M as of Q1 2026.
  • William Blair & Company bought 98 Comfort Systems shares in Q1 2026, an estimated $124K.
  • Comfort Systems made up ﹤0.01% of William Blair & Company's portfolio in Q1 2026, its #921 holding.
  • William Blair & Company first reported a position in Comfort Systems in Q2 2025 and has held it in 4 quarters since.
  • 1,196 funds tracked by Wall St. Rank held Comfort Systems as of Q1 2026.

Based on William Blair & Company's 13F filing for Q1 2026, filed 8 May 2026.