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	$209M	Buy	151,300 +113,100	+296%	+$144M	0.03%	389
2025 Q4	$35.7M	Buy	38,200 +26,600	+229%	+$24.6M	0.01%	1136
2025 Q3	$9.57M	Buy	11,600 +5,900	+104%	+$4M	﹤0.01%	2482
2025 Q2	$3.06M	Buy	5,700 +700	+14%	+$305K	﹤0.01%	3721
2025 Q1	$1.61M	Buy	5,000 +3,400	+213%	+$1.37M	﹤0.01%	4719
2024 Q4	$678K	Sell	1,600 -500	-24%	-$220K	﹤0.01%	6120
2024 Q3	$820K	Sell	2,100 -100	-5%	-$32.9K	﹤0.01%	6266
2024 Q2	$669K	Sell	2,200 -5,000	-69%	-$1.59M	﹤0.01%	6543
2024 Q1	$2.29M	Buy	7,200 +800	+13%	+$204K	﹤0.01%	3889
2023 Q4	$1.32M	Buy	6,400 +5,200	+433%	+$961K	﹤0.01%	5080
2023 Q3	$204K	Buy	+1,200	New	+$211K	﹤0.01%	7593

Other funds holding FIX

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 Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

AQR Capital Management Greenwich, Connecticut $218B AUM 29.41% 1-Year Est. Return

Capital World Investors Los Angeles, California $733B AUM 35.63% 1-Year Est. Return

JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return

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.