IMC Chicago Portfolio holdings
IMC-Chicago, a key arm of IMC Trading founded in 1989 by Rob Defares and René Schelvis in Amsterdam, is a proprietary trading firm and market maker headquartered in Chicago since opening its first overseas office there in 2000. Employing over 650 of IMC’s 1,600+ global workforce, it operates at the heart of North America’s financial hub, trading equities, options, futures, and other derivatives on major exchanges like the Chicago Mercantile Exchange (CME) and Chicago Board Options Exchange (CBOE). Known for its technology-driven approach, IMC-Chicago leverages advanced algorithms and low-latency systems to provide liquidity across more than 100 global venues, evolving from a trading outfit with strong tech to a tech company that trades. Under CEO Rob Defares, the firm emphasizes innovation, quantitative strategies, and a collaborative culture, making it a powerhouse in the U.S. derivatives market.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
iShares Russell 2000 ETF
IWM
|
+$302M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$170M |
| 3 |
Broadcom
AVGO
|
+$164M |
| 4 |
Tesla
TSLA
|
+$158M |
| 5 |
Palantir
PLTR
|
+$109M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
iShares Bitcoin Trust
IBIT
|
+$167M |
| 2 |
Applovin
APP
|
+$126M |
| 3 |
JD.com
JD
|
+$103M |
| 4 |
Amazon
AMZN
|
+$97.8M |
| 5 |
Vanguard S&P 500 ETF
VOO
|
+$90.4M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.56% |
| 2 | Consumer Discretionary | 0.3% |
| 3 | Communication Services | 0.16% |
| 4 | Financials | 0.13% |
| 5 | Industrials | 0.11% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1126
CALL
Viking Therapeutics
VKTX
$4B
| $11.5M | ﹤0.01% |
326,100
-21,900
| -6% | -$776K |
|
1127
PUT
ProShares UltraPro Short S&P 500
SPXU
$384M
| $11.5M | ﹤0.01% |
+230,500
| New | +$12M |
|
1128
PUT
Royal Bank of Canada
RY
$293B
| $11.5M | ﹤0.01% |
67,200
+10,500
| +19% | +$1.61M |
|
1129
CALL
Edwards Lifesciences
EW
$51.7B
| $11.4M | ﹤0.01% |
134,100
-12,200
| -8% | -$1M |
|
1130
CALL
ACM Research
ACMR
$5.79B
| $11.4M | ﹤0.01% |
289,700
+74,400
| +35% | +$2.77M |
|
1131
CALL
L3Harris
LHX
$53.4B
| $11.4M | ﹤0.01% |
38,900
-15,200
| -28% | -$4.39M |
|
1132
PUT
Alnylam Pharmaceuticals
ALNY
$29.3B
| $11.4M | ﹤0.01% |
28,700
| – | – |
|
1133
CALL
Galicia Financial Group
GGAL
$7.42B
| $11.4M | ﹤0.01% |
211,500
+115,400
| +120% | +$5.4M |
|
1134
CALL
Alexandria Real Estate Equities
ARE
$8.56B
| $11.4M | ﹤0.01% |
233,000
+142,300
| +157% | +$8.38M |
|
1135
AeroVironment
AVAV
$9.45B
| $11.4M | ﹤0.01% |
47,100
+24,844
| +112% | +$7.81M |
|
1136
PUT
NRG Energy
NRG
$24.8B
| $11.4M | ﹤0.01% |
71,400
-10,600
| -13% | -$1.75M |
|
1137
PUT
SAP
SAP
$238B
| $11.3M | ﹤0.01% |
46,700
-11,300
| -19% | -$2.88M |
|
1138
PUT
Fluor
FLR
$7.96B
| $11.3M | ﹤0.01% |
286,200
+116,300
| +68% | +$5.15M |
|
1139
CALL
AerCap
AER
$23.8B
| $11.3M | ﹤0.01% |
78,800
-12,200
| -13% | -$1.62M |
|
1140
PUT
CF Industries
CF
$17.3B
| $11.3M | ﹤0.01% |
146,300
-47,600
| -25% | -$3.91M |
|
1141
Riot Platforms
RIOT
$7.76B
| $11.3M | ﹤0.01% |
+888,417
| New | +$15.2M |
|
1142
CALL
Crown Castle
CCI
$32.2B
| $11.2M | ﹤0.01% |
126,300
+29,200
| +30% | +$2.69M |
|
1143
CALL
Carlyle Group
CG
$17.2B
| $11.2M | ﹤0.01% |
189,800
-37,600
| -17% | -$2.14M |
|
1144
CALL
Jefferies Financial Group
JEF
$13.1B
| $11.2M | ﹤0.01% |
180,800
+79,000
| +78% | +$4.53M |
|
1145
Roku
ROKU
$22.7B
| $11.2M | ﹤0.01% |
102,852
+2,133
| +2% | +$216K |
|
1146
PUT
DexCom
DXCM
$32B
| $11.2M | ﹤0.01% |
168,100
-137,100
| -45% | -$8.86M |
|
1147
CALL
C3.ai
AI
$1.59B
| $11.2M | ﹤0.01% |
827,500
-415,200
| -33% | -$6.62M |
|
1148
Freeport-McMoran
FCX
$97.5B
| $11.1M | ﹤0.01% |
219,220
-577,548
| -72% | -$25M |
|
|
FISV
1149
Fiserv Inc
FISV
$27.9B
| $11.1M | ﹤0.01% |
165,610
+83,115
| +101% | +$6.96M |
|
1150
CALL
Bilibili
BILI
$7.84B
| $11.1M | ﹤0.01% |
452,000
+86,900
| +24% | +$2.34M |
|
Similar funds
IMC Chicago's Q4 2025 Portfolio in Review
As of Q4 2025, IMC Chicago held 4,538 positions worth $275B, up 0.14% from $275B the previous quarter. Its ten largest holdings account for 36% of the portfolio.
IMC Chicago's Q4 2025 filing shows 985 new, 1,665 increased, 1,358 reduced and 525 closed positions. Its largest new stake was Palantir: 601,853 shares worth $107M. The largest sale was iShares Bitcoin Trust, an estimated $167M.
By sector, the portfolio is most concentrated in Technology at 0.56% of assets, up from 0.33% a quarter earlier, followed by Consumer Discretionary and Communication Services.
- IMC Chicago's largest Q4 2025 buy was Palantir: 601,853 shares worth $107M.
- IMC Chicago added most to iShares Russell 2000 ETF in Q4 2025, an estimated $302M increase.
- IMC Chicago's biggest Q4 2025 reduction was iShares Bitcoin Trust, cutting an estimated $167M.
- IMC Chicago fully exited Amazon in Q4 2025, selling an estimated $97.8M.
- IMC Chicago's ten largest holdings make up 36% of its $275B portfolio in Q4 2025.
- IMC Chicago opened 985 new positions and closed 525 in Q4 2025.
- IMC Chicago's portfolio value rose 0.14% quarter-over-quarter to $275B.
Based on IMC Chicago's 13F filing for Q4 2025, filed 29 Jan 2026.