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 | |
|---|---|---|---|---|---|---|---|
4276
PUT
Primo Brands
PRMB
$7.13B
| $694K | ﹤0.01% |
28,400
-20,100
| -41% | -$446K |
2025 Q4
2 quarters
|
|
4277
CALL
TORM
TRMD
$4.1B
| $693K | ﹤0.01% |
26,600
+9,600
| +56% | +$291K |
2025 Q2
4 quarters
|
|
4278
VanEck Pharmaceutical ETF
PPH
$1.12B
| $692K | ﹤0.01% |
6,329
+3,072
| +94% | +$318K |
2025 Q4
2 quarters
|
|
4279
Leverage Shares 2X Long AMD Daily ETF
AMDG
$24M
| $692K | ﹤0.01% |
+4,943
| New | +$397K |
2026 Q2
0 quarters
|
|
4280
PUT
Robert Half
RHI
$4.7B
| $691K | ﹤0.01% |
22,500
+4,400
| +24% | +$123K |
2025 Q2
4 quarters
|
|
4281
CALL
iRhythm Holdings
IRTC
$4B
| $690K | ﹤0.01% |
5,800
+2,200
| +61% | +$256K |
2026 Q1
1 quarter
|
|
4282
PUT
Onity Group
ONIT
$215M
| $688K | ﹤0.01% |
17,300
+5,900
| +52% | +$233K |
2026 Q1
1 quarter
|
|
4283
CALL
Atomera
ATOM
$115M
| $687K | ﹤0.01% |
78,900
+67,700
| +604% | +$531K |
2026 Q1
1 quarter
|
|
4284
ODDITY Tech
ODD
$1.04B
| $687K | ﹤0.01% |
45,383
+30,763
| +210% | +$412K |
2025 Q4
2 quarters
|
|
4285
CALL
Honda
HMC
$44.3B
| $686K | ﹤0.01% |
25,300
-1,700
| -6% | -$43.2K |
2024 Q4
6 quarters
|
|
4286
CALL
DRDGold
DRD
$2.08B
| $686K | ﹤0.01% |
32,200
+2,400
| +8% | +$64.8K |
2025 Q3
3 quarters
|
|
4287
PUT
Alliance Resource Partners
ARLP
$3.36B
| $686K | ﹤0.01% |
28,600
-6,900
| -19% | -$175K |
2024 Q3
7 quarters
|
|
4288
PUT
Tandem Diabetes Care
TNDM
$1.21B
| $685K | ﹤0.01% |
45,400
+24,700
| +119% | +$431K |
2025 Q4
2 quarters
|
|
4289
Vanguard Real Estate ETF
VNQ
$37.2B
| $685K | ﹤0.01% |
7,104
-11,733
| -62% | -$1.12M |
2025 Q3
3 quarters
|
|
4290
CALL
Progyny
PGNY
$2.22B
| $683K | ﹤0.01% |
23,700
+11,100
| +88% | +$248K |
2025 Q4
2 quarters
|
|
4291
Rezolve AI
RZLV
$613M
| $683K | ﹤0.01% |
216,841
+32,197
| +17% | +$84.7K |
2025 Q4
2 quarters
|
|
4292
PUT
Sabre
SABR
$613M
| $683K | ﹤0.01% |
326,800
-200
| -0.1% | -$350 |
2024 Q2
8 quarters
|
|
4293
Trex
TREX
$5.13B
| $683K | ﹤0.01% |
+13,648
| New | +$566K |
2026 Q2
0 quarters
|
|
4294
PUT
Sidus Space
SIDU
$117M
| $683K | ﹤0.01% |
+243,000
| New | +$931K |
2026 Q2
0 quarters
|
|
4295
CALL
Astronics
ATRO
$2.49B
| $683K | ﹤0.01% |
+8,400
| New | +$573K |
2026 Q2
0 quarters
|
|
4296
PUT
Americold
COLD
$4.13B
| $682K | ﹤0.01% |
43,400
-34,800
| -45% | -$478K |
2025 Q4
2 quarters
|
|
4297
CALL
Steven Madden
SHOO
$3.16B
| $682K | ﹤0.01% |
16,200
-142,900
| -90% | -$5.78M |
2025 Q3
3 quarters
|
|
4298
Schwab US Broad Market ETF
SCHB
$44.3B
| $680K | ﹤0.01% |
23,489
+5,570
| +31% | +$156K |
2026 Q1
1 quarter
|
|
4299
PUT
Dentsply Sirona
XRAY
$1.88B
| $680K | ﹤0.01% |
64,100
+22,200
| +53% | +$242K |
2025 Q3
3 quarters
|
|
4300
PUT
Descartes Systems
DSGX
$8.04B
| $679K | ﹤0.01% |
9,800
+1,100
| +13% | +$78.5K |
2026 Q1
1 quarter
|
|
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.