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 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$568M |
| 2 |
Amazon
AMZN
|
+$341M |
| 3 |
iShares MSCI South Korea ETF
EWY
|
+$278M |
| 4 |
Apple
AAPL
|
+$239M |
| 5 |
TSMC
TSM
|
+$215M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$316M |
| 2 |
Tesla
TSLA
|
+$253M |
| 3 |
Micron Technology
MU
|
+$178M |
| 4 |
iShares Bitcoin Trust
IBIT
|
+$176M |
| 5 |
Sandisk
SNDK
|
+$159M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Miscellaneous | 97.94% |
| 2 | Technology | 0.92% |
| 3 | Consumer Discretionary | 0.31% |
| 4 | Financials | 0.17% |
| 5 | Communication Services | 0.16% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | Held Since | |
|---|---|---|---|---|---|---|---|
4151
CALL
Mayville Engineering Co
MEC
$324M
| $775K | ﹤0.01% |
+20,700
| New | +$553K |
2026 Q2
0 quarters
|
|
4152
PUT
Amentum Holdings
AMTM
$5.32B
| $775K | ﹤0.01% |
37,500
+200
| +0.5% | +$4.84K |
2025 Q4
2 quarters
|
|
4153
PUT
Cinemark Holdings
CNK
$4.6B
| $774K | ﹤0.01% |
24,400
-4,700
| -16% | -$139K |
2024 Q1
9 quarters
|
|
4154
CALL
Cooper-Standard Automotive
CPS
$362M
| $774K | ﹤0.01% |
28,600
+200
| +0.7% | +$5.89K |
2025 Q3
3 quarters
|
|
4155
CALL
International Seaways
INSW
$5.67B
| $774K | ﹤0.01% |
10,100
-300
| -3% | -$24.3K |
2026 Q1
1 quarter
|
|
4156
PUT
MSC Industrial Direct
MSM
$6.36B
| $773K | ﹤0.01% |
6,500
+2,300
| +55% | +$244K |
2025 Q4
2 quarters
|
|
4157
CALL
Calix
CALX
$2.3B
| $773K | ﹤0.01% |
20,700
+11,600
| +127% | +$487K |
2026 Q1
1 quarter
|
|
4158
Gartner
IT
$14.5B
| $772K | ﹤0.01% |
5,958
+4,174
| +234% | +$629K |
2026 Q1
1 quarter
|
|
4159
Encompass Health
EHC
$12.2B
| $772K | ﹤0.01% |
7,638
-431
| -5% | -$44.6K |
2026 Q1
1 quarter
|
|
4160
PUT
EPR Properties
EPR
$4.29B
| $772K | ﹤0.01% |
13,300
-2,700
| -17% | -$154K |
2026 Q1
1 quarter
|
|
4161
EnerSys
ENS
$5.99B
| $771K | ﹤0.01% |
+3,296
| New | +$716K |
2026 Q2
0 quarters
|
|
4162
Turning Point Brands
TPB
$1.28B
| $769K | ﹤0.01% |
+9,066
| New | +$753K |
2026 Q2
0 quarters
|
|
4163
PUT
Fervo Energy
FRVO
$2.37B
| $769K | ﹤0.01% |
+26,300
| New | +$950K |
2026 Q2
0 quarters
|
|
4164
PUT
TAL Education Group
TAL
$5.64B
| $768K | ﹤0.01% |
80,300
+28,900
| +56% | +$304K |
2022 Q3
15 quarters
|
|
4165
CALL
Nexstar Media Group
NXST
$5.16B
| $768K | ﹤0.01% |
4,300
+1,800
| +72% | +$337K |
2026 Q1
1 quarter
|
|
4166
PPL Corp
PPL
$26.3B
| $767K | ﹤0.01% |
+21,088
| New | +$779K |
2026 Q2
0 quarters
|
|
4167
CALL
Andersons Inc
ANDE
$2.21B
| $766K | ﹤0.01% |
11,200
+6,900
| +160% | +$501K |
2026 Q1
1 quarter
|
|
4168
PUT
OSI Systems
OSIS
$3.15B
| $765K | ﹤0.01% |
3,500
+500
| +17% | +$122K |
2026 Q1
1 quarter
|
|
4169
Tencent Music
TME
$13.9B
| $764K | ﹤0.01% |
91,513
-146,578
| -62% | -$1.34M |
2025 Q4
2 quarters
|
|
4170
CALL
Polestar Automotive Holding UK
PSNY
$603M
| $762K | ﹤0.01% |
40,600
-500
| -1% | -$10K |
2025 Q4
2 quarters
|
|
4171
PUT
ZoomInfo Technologies
GTM
$1.27B
| $762K | ﹤0.01% |
260,200
+239,600
| +1,163% | +$1.08M |
2021 Q3
19 quarters
|
|
4172
CALL
Almonty Industries
ALM
$2.56B
| $762K | ﹤0.01% |
+46,000
| New | +$878K |
2026 Q2
0 quarters
|
|
4173
CALL
First Financial Bancorp
FFBC
$3.43B
| $761K | ﹤0.01% |
+22,500
| New | +$687K |
2026 Q2
0 quarters
|
|
4174
PUT
Dropbox
DBX
$8.23B
| $761K | ﹤0.01% |
27,700
-7,100
| -20% | -$182K |
2018 Q4
30 quarters
|
|
4175
Defiance Daily Target 2X Short MU ETF
MUZ
$3.56M
| $760K | ﹤0.01% |
+76,028
| New | +$1.08M |
2026 Q2
0 quarters
|
|
Similar funds
IMC Chicago's Q2 2026 Portfolio in Review
As of Q2 2026, IMC Chicago held 6,955 positions worth $419B, up 50% from $278B the previous quarter. Its ten largest holdings account for 34% of the portfolio.
IMC Chicago's Q2 2026 filing shows 1,282 new, 3,251 increased, 1,751 reduced and 653 closed positions. Its largest new stake was Microsoft: 303,034 shares worth $113M. The largest sale was State Street SPDR S&P 500 ETF Trust, an estimated $316M.
By sector, the portfolio is most concentrated in Miscellaneous at 98% of assets, down from 98% a quarter earlier, followed by Technology and Consumer Discretionary.
- IMC Chicago's largest Q2 2026 buy was Microsoft: 303,034 shares worth $113M.
- IMC Chicago added most to State Street SPDR Dow Jones Industrial Average ETF Trust in Q2 2026, an estimated $568M increase.
- IMC Chicago's biggest Q2 2026 reduction was Tesla, cutting an estimated $253M.
- IMC Chicago fully exited State Street SPDR S&P 500 ETF Trust in Q2 2026, selling an estimated $316M.
- IMC Chicago's ten largest holdings make up 34% of its $419B portfolio in Q2 2026.
- IMC Chicago opened 1,282 new positions and closed 653 in Q2 2026.
- IMC Chicago's portfolio value rose 50% quarter-over-quarter to $419B.
Based on IMC Chicago's 13F filing for Q2 2026, filed 6 Aug 2026.