Jane Street
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Jane Street’s Comfort Systems FIX Stock Holding History

Jane Street’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 		$190M Buy
138,000
+110,200
+396% +$140M 0.02% 417
2025
Q4 		$25.9M Buy
27,800
+19,800
+248% +$18.3M ﹤0.01% 1388
2025
Q3 		$6.6M Sell
8,000
-8,600
-52% -$5.83M ﹤0.01% 2994
2025
Q2 		$8.9M Sell
16,600
-8,300
-33% -$3.62M ﹤0.01% 2279
2025
Q1 		$8.03M Buy
24,900
+1,800
+8% +$726K ﹤0.01% 2274
2024
Q4 		$9.8M Buy
23,100
+11,800
+104% +$5.18M ﹤0.01% 1904
2024
Q3 		$4.41M Buy
11,300
+8,700
+335% +$2.87M ﹤0.01% 3070
2024
Q2 		$791K Sell
2,600
-18,800
-88% -$5.98M ﹤0.01% 6225
2024
Q1 		$6.8M Buy
21,400
+10,400
+95% +$2.66M ﹤0.01% 2226
2023
Q4 		$2.26M Sell
11,000
-9,400
-46% -$1.74M ﹤0.01% 4111
2023
Q3 		$3.48M Buy
20,400
+8,200
+67% +$1.44M ﹤0.01% 3148
2023
Q2 		$2M Buy
+12,200
New +$1.81M ﹤0.01% 4161

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

Jane Street's FIX Position: Q1 2026 in Review

Jane Street increased its Comfort Systems (FIX) stake by 26% in Q1 2026, buying an estimated $896K and bringing the position to 3,463 shares worth $4.78M. The position accounts for ﹤0.01% of the portfolio, ranked #3590.

Jane Street first reported a position in FIX in Q2 2013 and has held it in 27 quarters since. The position peaked at $80.4M in Q2 2024. 1,196 funds tracked by Wall St. Rank hold FIX as of Q1 2026.

  • Jane Street held 3,463 shares of Comfort Systems worth $4.78M as of Q1 2026.
  • Jane Street bought 706 Comfort Systems shares in Q1 2026, an estimated $896K.
  • Comfort Systems made up ﹤0.01% of Jane Street's portfolio in Q1 2026, its #3590 holding.
  • Jane Street first reported a position in Comfort Systems in Q2 2013 and has held it in 27 quarters since.
  • Jane Street's Comfort Systems position peaked at $80.4M in Q2 2024.
  • 1,196 funds tracked by Wall St. Rank held Comfort Systems as of Q1 2026.

Based on Jane Street's 13F filing for Q1 2026, filed 12 May 2026.