DIMETRICS
F
Comfort Systems USA
FIX · AI Construction & EPC
$1,734.72
-40.38 (-2.27%)
As of Jul 15, 2026 close
Institutional Ownership — Q1 2026 (filed through May 26)
Institutional Holders
1180
+145 vs Q4 2025
Shares Held
32.4M
-802K QoQ
% of Shares Out
35.6%
12.5M held with sole discretion
Value Held
$56.3B
at $1,734.72 · Jul 15, 2026 close
5%+ Owners
4
via 13G/13D
% of Shares Out counts only shares held with sole investment discretion. Where two managers share discretion, Form 13F requires each to report the full position, so summing every filer exceeds 100% of shares outstanding for widely-held names.
Holder Map
Block size ∝ position · color = QoQ change
Whale Activity — Q1 2026 Filings
Increased441
Decreased392
New position241
Closed96
Institutional Shares Held by Quarter
Holders
Sortable · search holders
Source
% of Shrs Out
Period
BlackRock, Inc.13F
3,512,927
+64,292
+1.9%
$4.8B
10.0%
Mar 31, 2026
VANGUARD CAPITAL MANAGEMENT LLC13F
2,285,949
+2,285,949
new
$3.2B
6.5%
Mar 31, 2026
VANGUARD PORTFOLIO MANAGEMENT LLC13F
1,881,184
+1,881,184
new
$2.6B
5.3%
Mar 31, 2026
STATE STREET CORP13F
1,471,879
+43,205
+3.0%
$2.0B
4.2%
Mar 31, 2026
FMR LLC13F
1,449,517
-221,194
-13.2%
$2.0B
4.1%
Mar 31, 2026
GEODE CAPITAL MANAGEMENT, LLC13F
1,238,619
+52,710
+4.4%
$1.7B
3.5%
Mar 31, 2026
AQR CAPITAL MANAGEMENT LLC13F
1,116,230
+96,308
+9.4%
$1.5B
3.2%
Mar 31, 2026
JPMORGAN CHASE & CO13F
889,891
+182,899
+25.9%
$1.1B
2.5%
Mar 31, 2026
Capital World Investors13F
865,780
-774,752
-47.2%
$1.2B
2.5%
Mar 31, 2026
WESTFIELD CAPITAL MANAGEMENT CO LP13F
620,915
-47,920
-7.2%
$856.2M
1.8%
Mar 31, 2026
Invesco Ltd.13F
606,580
-46,399
-7.1%
$836.5M
1.7%
Mar 31, 2026
MORGAN STANLEY13F
460,135
+28,462
+6.6%
$634.5M
1.3%
Mar 31, 2026
FIRST TRUST ADVISORS LP13F
415,886
-66,213
-13.7%
$573.5M
1.2%
Mar 31, 2026
Capital International Investors13F
391,831
+278,199
+244.8%
$540.3M
1.1%
Mar 31, 2026
NORTHERN TRUST CORP13F
329,098
+10,316
+3.2%
$453.8M
0.9%
Mar 31, 2026
CHARLES SCHWAB INVESTMENT MANAGEMENT INC13F
287,735
+1,253
+0.4%
$396.8M
0.8%
Mar 31, 2026
DIMENSIONAL FUND ADVISORS LP13F
279,947
+14,423
+5.4%
$385.8M
0.8%
Mar 31, 2026
FEDERATED HERMES, INC.13F
267,030
-50,436
-15.9%
$368.2M
0.8%
Mar 31, 2026
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP13F
252,979
+28,712
+12.8%
$348.9M
0.7%
Mar 31, 2026
Hood River Capital Management LLC13F
249,385
+3,528
+1.4%
$343.9M
0.7%
Mar 31, 2026
GOLDMAN SACHS GROUP INC13F
244,047
+46,057
+23.3%
$336.5M
0.7%
Mar 31, 2026
FULLER & THALER ASSET MANAGEMENT, INC.13F
242,196
-46,843
-16.2%
$334.0M
0.7%
Mar 31, 2026
DEUTSCHE BANK AG\13F
240,791
-72,033
-23.0%
$332.0M
0.7%
Mar 31, 2026
LORD, ABBETT & CO. LLC13F
237,647
-33,933
-12.5%
$327.7M
0.7%
Mar 31, 2026
BAILLIE GIFFORD & CO13F
225,118
-49,624
-18.1%
$310.4M
0.6%
Mar 31, 2026
Point72 Asset Management, L.P.13F
219,232
+72,378
+49.3%
$302.3M
0.6%
Mar 31, 2026
Bank of New York Mellon Corp13F
218,195
-9,493
-4.2%
$300.9M
0.6%
Mar 31, 2026
Value Aligned Research Advisors, LLC13F
213,637
+66,616
+45.3%
$294.6M
0.6%
Mar 31, 2026
Castle Hook Partners LP13F
208,906
-58,928
-22.0%
$288.1M
0.6%
Mar 31, 2026
Artisan Partners Limited Partnership13F
208,177
-8,034
-3.7%
$287.1M
0.6%
Mar 31, 2026
FRANKLIN RESOURCES INC13F
203,388
+23,377
+13.0%
$280.5M
0.6%
Mar 31, 2026
VANGUARD FIDUCIARY TRUST CO13F
202,952
+202,952
new
$279.9M
0.6%
Mar 31, 2026
UBS Group AG13F
190,544
+36,810
+23.9%
$262.8M
0.5%
Mar 31, 2026
Nuveen, LLC13F
188,471
+11,485
+6.5%
$259.9M
0.5%
Mar 31, 2026
PRICE T ROWE ASSOCIATES INC /MD/13F
161,169
-16,447
-9.3%
$222.3M
0.5%
Mar 31, 2026
Clearbridge Investments, LLC13F
159,961
-40,584
-20.2%
$220.6M
0.5%
Mar 31, 2026
Legal & General Group Plc13F
153,779
+31,919
+26.2%
$212.1M
0.4%
Mar 31, 2026
Capital Research Global Investors13F
153,639
+37,052
+31.8%
$211.9M
0.4%
Mar 31, 2026
SG Americas Securities, LLC13F
153,458
+30,993
+25.3%
$211.6M
0.4%
Mar 31, 2026
ALLIANCEBERNSTEIN L.P.13F
148,961
-33,846
-18.5%
$139.0M
0.4%
Mar 31, 2026
AMERIPRISE FINANCIAL INC13F
147,298
+31,318
+27.0%
$203.1M
0.4%
Mar 31, 2026
ROYAL BANK OF CANADA13F
146,195
+28,829
+24.6%
$201.6M
0.4%
Mar 31, 2026
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC13F
146,007
+11,731
+8.7%
$201.3M
0.4%
Mar 31, 2026
ROYAL LONDON ASSET MANAGEMENT LTD13F
138,256
-56,544
-29.0%
$190.7M
0.4%
Mar 31, 2026
Amundi13F
136,835
+24,209
+21.5%
$188.7M
0.4%
Mar 31, 2026
RAYMOND JAMES FINANCIAL INC13F
135,009
+48,619
+56.3%
$181.3M
0.4%
Mar 31, 2026
Evercore Wealth Management, LLC13F
134,308
-20,929
-13.5%
$185.2M
0.4%
Mar 31, 2026
BANK OF AMERICA CORP /DE/13F
129,056
-25,546
-16.5%
$178.0M
0.4%
Mar 31, 2026
Allspring Global Investments Holdings, LLC13F
124,989
+59,623
+91.2%
$178.5M
0.4%
Mar 31, 2026
VOYA INVESTMENT MANAGEMENT LLC13F
121,608
-56,519
-31.7%
$167.2M
0.3%
Mar 31, 2026
Page 1 of 20
Derivatives Institutional Owners
13F put/call positions · excluded from ownership totals
Type
Period
CITADEL ADVISORS LLCPut
158,100
+100,400
+174.0%
$218.0M
Mar 31, 2026
JANE STREET GROUP, LLCPut
151,300
+113,100
+296.1%
$208.6M
Mar 31, 2026
JANE STREET GROUP, LLCCall
138,000
+110,200
+396.4%
$190.3M
Mar 31, 2026
CITADEL ADVISORS LLCCall
118,500
+89,500
+308.6%
$163.4M
Mar 31, 2026
SUSQUEHANNA INTERNATIONAL GROUP, LLPPut
97,500
-10,800
-10.0%
$134.5M
Mar 31, 2026
SUSQUEHANNA INTERNATIONAL GROUP, LLPCall
96,100
+15,900
+19.8%
$132.5M
Mar 31, 2026
Tidal Investments LLCPut
40,000
+40,000
new
$55.2M
Mar 31, 2026
Temasek Holdings (Private) LtdPut
40,000
+40,000
new
$55.2M
Mar 31, 2026
Squarepoint Ops LLCPut
39,300
+21,900
+125.9%
$54.2M
Mar 31, 2026
Point72 Asset Management, L.P.Put
27,200
-1,000
-3.5%
$37.5M
Mar 31, 2026
Jain Global LLCCall
21,600
+21,600
new
$29.8M
Mar 31, 2026
Jain Global LLCPut
17,600
+17,600
new
$24.3M
Mar 31, 2026
D. E. Shaw & Co., Inc.Put
16,200
-9,400
-36.7%
$22.3M
Mar 31, 2026
Point72 Asset Management, L.P.Call
15,100
+400
+2.7%
$20.8M
Mar 31, 2026
D. E. Shaw & Co., Inc.Call
12,100
-2,100
-14.8%
$16.7M
Mar 31, 2026
Squarepoint Ops LLCCall
8,300
+1,700
+25.8%
$11.4M
Mar 31, 2026
LAKEWOOD CAPITAL MANAGEMENT, LPPut
8,000
+0
+0.0%
$11.0M
Mar 31, 2026
Laurion Capital Management LPPut
7,100
+7,100
new
$9.8M
Mar 31, 2026
MILLENNIUM MANAGEMENT LLCCall
6,600
+6,600
new
$9.1M
Mar 31, 2026
TWO SIGMA INVESTMENTS, LPCall
2,000
+2,000
new
$2.8M
Mar 31, 2026
Laurion Capital Management LPCall
2,000
+2,000
new
$2.8M
Mar 31, 2026
TWO SIGMA INVESTMENTS, LPPut
2,000
+2,000
new
$2.8M
Mar 31, 2026
TUDOR INVESTMENT CORP ET ALCall
1,800
-2,800
-60.9%
$2.5M
Mar 31, 2026
Walleye Trading LLCCall
1,600
-900
-36.0%
$2.2M
Mar 31, 2026
TUDOR INVESTMENT CORP ET ALPut
1,400
-1,500
-51.7%
$1.9M
Mar 31, 2026
Walleye Trading LLCPut
1,200
-200
-14.3%
$1.7M
Mar 31, 2026
Dockside LLCPut
1,040
+1,040
new
$1.4M
Mar 31, 2026
MILLENNIUM MANAGEMENT LLCPut
800
-200
-20.0%
$1.1M
Mar 31, 2026
Alphadyne Asset Management LPCall
600
+600
new
$827.4K
Mar 31, 2026
Walleye Capital LLCPut
500
-1,100
-68.8%
$689.5K
Mar 31, 2026
Cetera Investment AdvisersPut
400
+0
+0.0%
$400.0K
Mar 31, 2026
Alphadyne Asset Management LPPut
400
+400
new
$551.6K
Mar 31, 2026
Walleye Capital LLCCall
200
-200
-50.0%
$275.8K
Mar 31, 2026
Verdence Capital Advisors LLCCall
100
+100
new
$137.9K
Mar 31, 2026
Ownership Events — 13G / 13D
Event-driven, scanned daily
FMR LLC falls below 5% (from 5.4%)
Schedule 13G/A · position exited
13G/AMay 6, 2026
Vanguard Portfolio Management crosses 5.0%
Initial Schedule 13G · 1,891,176 shares reported
13GApr 29, 2026
Vanguard Capital Management crosses 5.0%
Initial Schedule 13G · 2,634,611 shares reported
13GApr 29, 2026
Capital World Investors falls below 5% (from 5.1%)
Schedule 13G/A · position exited
13G/AFeb 13, 2026
The Vanguard Group reports 12.2%
Schedule 13G/A · amendment
13G/AJan 30, 2026
BlackRock, Inc. reports 8.3% (from 10.8%)
Schedule 13G/A · amendment
13G/AJan 21, 2026
BlackRock, Inc. reports 10.8% (from 9.4%)
Schedule 13G/A · amendment
13G/ADec 4, 2025
Capital World Investors reports 5.1% (from 6.4%)
Schedule 13G/A · amendment
13G/ANov 13, 2025
FMR LLC crosses 5.0%
Initial Schedule 13G · 1,892,021.47 shares reported
13GNov 5, 2025
BlackRock, Inc. reports 9.4%
Schedule 13G/A · amendment
13G/AApr 24, 2025
Quarterly holdings from SEC Form 13F-HR structured data sets (filed within 45 days of quarter end); 5%+ ownership events from Schedule 13G/13D filings scanned daily via EDGAR. Each row links to the source filing. Est. Avg Cost is a rolling-average estimate — each quarter's added shares priced at that quarter's 13F value ÷ shares, split-adjusted, with history beginning 2024-Q2; positions with one quarter of history or a data-quality flag show “—”.