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Equibles

CITADEL ADVISORS LLC

Position in FIX — Comfort Systems USA Inc

CIK 1423053 MIAMI, FL
Back to FIX Full portfolio

Position in FIX

as of Jun 30, 2026 · filed Aug 14, 2026
Position Value
$92,872,194
+$59,369,633 QoQ
Shares Held
46,859
+92.9% QoQ
Ownership
0.133%
of shares outstanding
% of Portfolio
0.06%
of 13F equity value
Holder Rank
#102
of 1,341 holders
Holding Since
Mar 2020
26 quarters on record
Voting authority Sole 100% Shared 0% None 0%

Common Shares in FIX Over Time

Shares Held

Position Value (USD)

Derivatives in FIX

reported options exposure · as of Jun 30, 2026
CallValue
$217,419,915
CallShares
109,700
PutValue
$221,185,620
PutShares
111,600

Notional value of option positions as reported on Form 13F. Calls and puts are disclosed separately and do not net against the common-share stake above.

Position in Engineering & Construction

Industrials · as of Jun 30, 2026

CITADEL ADVISORS LLC holds $1,086,069,989 across 37 Engineering & Construction names. FIX ranks #2 (8.6% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 PWR
Quanta Services, Inc.
 632,022 $455,081,120
2 FIX
Comfort Systems USA Inc
This page 		46,859 $92,872,194
3 EME
EMCOR Group, Inc.
 94,598 $78,504,988
4 DY
Dycom Industries Inc
 153,980 $77,850,748
5 STRL
Sterling Infrastructure, Inc.
 69,151 $58,042,582
6 ACM
Aecom
 677,771 $47,308,415
7 TTEK
Tetra Tech Inc
 1,287,534 $37,196,856
8 FLR
Fluor Corp
 592,625 $31,047,622

All Filings in FIX

Export CSV
50 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $221,185,620 111,600
2026-06-30 $92,872,194 46,859
2026-06-30 $217,419,915 109,700
2026-03-31 $33,502,561 24,295
2026-03-31 $163,410,315 118,500
2026-03-31 $218,018,319 158,100
2025-12-31 $27,065,410 29,000
2025-12-31 $8,529,336 9,139
2025-12-31 $53,850,833 57,700
2025-09-30 $54,956,988 66,600
2025-09-30 $57,105,756 69,204
2025-09-30 $31,109,286 37,700
2025-06-30 $34,490,635 64,323
2025-06-30 $22,413,578 41,800
2025-06-30 $14,960,259 27,900
2025-03-31 $15,278,442 47,400
2025-03-31 $12,603,103 39,100
2025-03-31 $62,442,089 193,721
2024-12-31 $15,775,032 37,200
2024-12-31 $12,340,146 29,100
2024-12-31 $10,832,612 25,545
2024-09-30 $7,924,105 20,300
2024-09-30 $15,692,070 40,200
2024-09-30 $16,168,686 41,421
2024-06-30 $10,826,672 35,600
2024-06-30 $11,681,857 38,412
2024-06-30 $1,703,072 5,600
2024-03-31 $8,165,147 25,700
2024-03-31 $25,628,394 80,666
2024-03-31 $3,685,436 11,600
2023-12-31 $1,665,927 8,100
2023-12-31 $12,261,222 59,616
2023-12-31 $4,545,307 22,100
2023-09-30 $4,515,865 26,500
2023-09-30 $3,200,470 18,781
2023-09-30 $2,402,781 14,100
2023-06-30 $3,151,819 19,195
2023-06-30 $476,180 2,900
2023-06-30 $4,088,580 24,900
2023-03-31 $2,131,016 14,600
2023-03-31 $321,112 2,200
2023-03-31 $39,364,973 269,697
2022-12-31 $1,461,516 12,700
2022-12-31 $1,288,896 11,200
2022-12-31 $17,916,344 155,686
2022-09-30 $12,149,703 124,830
2022-09-30 $360,121 3,700
2022-09-30 $1,382,086 14,200
2022-06-30 $2,680,007 32,231
2022-06-30 $981,170 11,800

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