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 Q2	$226M	Sell	114,100 -37,200	-25%	-$67.5M	0.02%	528
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 $6.73T AUM 46.02% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

AQR Capital Management Greenwich, Connecticut $287B AUM 42.33% 1-Year Est. Return

JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return

Capital World Investors Los Angeles, California $846B AUM 46.74% 1-Year Est. Return

Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return

Jane Street's FIX Position: Q2 2026 in Review

Jane Street reduced its Comfort Systems (FIX) stake by 9.4% in Q2 2026, selling an estimated $593K and leaving 3,136 shares worth $6.22M. The position accounts for ﹤0.01% of the portfolio, ranked #3415.

Jane Street first reported a position in FIX in Q2 2013 and has held it in 28 quarters since. The position peaked at $80.4M in Q2 2024. 1,350 funds tracked by Wall St. Rank hold FIX as of Q2 2026.

Jane Street held 3,136 shares of Comfort Systems worth $6.22M as of Q2 2026.
Jane Street sold 327 Comfort Systems shares in Q2 2026, an estimated $593K.
Comfort Systems made up ﹤0.01% of Jane Street's portfolio in Q2 2026, its #3415 holding.
Jane Street first reported a position in Comfort Systems in Q2 2013 and has held it in 28 quarters since.
Jane Street's Comfort Systems position peaked at $80.4M in Q2 2024.
1,350 funds tracked by Wall St. Rank held Comfort Systems as of Q2 2026.

Based on Jane Street's 13F filing for Q2 2026, filed 14 Aug 2026.