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 |
Invesco QQQ Trust
QQQ
|
+$203M |
| 2 |
JD.com
JD
|
+$105M |
| 3 |
Boeing
BA
|
+$105M |
| 4 |
Applovin
APP
|
+$93.6M |
| 5 |
Netflix
NFLX
|
+$81.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$167M |
| 2 |
State Street Financial Select Sector SPDR ETF
XLF
|
+$146M |
| 3 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$135M |
| 4 |
Pinduoduo
PDD
|
+$128M |
| 5 |
Palantir
PLTR
|
+$108M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 0.39% |
| 2 | Technology | 0.33% |
| 3 | Communication Services | 0.22% |
| 4 | Industrials | 0.16% |
| 5 | Financials | 0.14% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3251
CALL
FormFactor
FORM
$9.46B
| $437K | ﹤0.01% |
12,000
-1,200
| -9% | -$38.6K |
|
3252
PUT
Coursera
COUR
$1.5B
| $437K | ﹤0.01% |
37,300
+10,300
| +38% | +$112K |
|
3253
PUT
Liberty Global Class A
LBTYA
$3.48B
| $437K | ﹤0.01% |
38,100
+15,400
| +68% | +$169K |
|
3254
CALL
Extreme Networks
EXTR
$3.14B
| $436K | ﹤0.01% |
21,100
-700
| -3% | -$13.9K |
|
3255
CALL
Harmony Biosciences
HRMY
$2.3B
| $435K | ﹤0.01% |
+15,800
| New | +$544K |
|
3256
Altimmune
ALT
$583M
| $435K | ﹤0.01% |
115,360
-71,458
| -38% | -$276K |
|
3257
PUT
Stratasys
SSYS
$782M
| $433K | ﹤0.01% |
38,700
-24,200
| -38% | -$261K |
|
3258
CALL
Byrna Technologies
BYRN
$107M
| $432K | ﹤0.01% |
19,500
+6,800
| +54% | +$151K |
|
|
TWO
3259
PUT
Two Harbors Investment
TWO
$1.26B
| $431K | ﹤0.01% |
43,700
+24,700
| +130% | +$249K |
|
3260
CALL
LifeMD
LFMD
$163M
| $430K | ﹤0.01% |
63,400
+12,000
| +23% | +$99.1K |
|
3261
Tilray
TLRY
$651M
| $430K | ﹤0.01% |
+24,853
| New | +$238K |
|
3262
PUT
Open Text
OTEX
$5.81B
| $430K | ﹤0.01% |
+11,500
| New | +$369K |
|
3263
PUT
Crescent Energy
CRGY
$4.1B
| $428K | ﹤0.01% |
+48,000
| New | +$436K |
|
|
CAN
3264
CALL
Canaan Creative
CAN
$150M
| $428K | ﹤0.01% |
485,300
+61,000
| +14% | +$46.3K |
|
|
APLS
3265
PUT
DELISTED
Apellis Pharmaceuticals
APLS
| $428K | ﹤0.01% |
18,900
+2,200
| +13% | +$51.3K |
|
3266
PUT
Schrodinger
SDGR
$1.4B
| $427K | ﹤0.01% |
21,300
-1,600
| -7% | -$32.1K |
|
3267
CALL
Beazer Homes USA
BZH
$874M
| $427K | ﹤0.01% |
17,400
-14,900
| -46% | -$366K |
|
|
CIM
3268
CALL
Chimera Investment
CIM
$996M
| $427K | ﹤0.01% |
32,300
+1,400
| +5% | +$19.5K |
|
3269
CALL
FLEX LNG
FLNG
$1.58B
| $426K | ﹤0.01% |
16,900
-8,300
| -33% | -$206K |
|
3270
CALL
Tandem Diabetes Care
TNDM
$1.63B
| $425K | ﹤0.01% |
35,000
+17,400
| +99% | +$236K |
|
3271
CALL
Denison Mines
DNN
$3B
| $424K | ﹤0.01% |
+154,100
| New | +$341K |
|
3272
PUT
Anavex Life Sciences
AVXL
$325M
| $423K | ﹤0.01% |
+47,500
| New | +$482K |
|
3273
NovoCure
NVCR
$2.06B
| $420K | ﹤0.01% |
32,534
+12,764
| +65% | +$171K |
|
3274
PUT
Sprott Junior Uranium Miners ETF
URNJ
$366M
| $420K | ﹤0.01% |
14,400
+3,000
| +26% | +$69.5K |
|
3275
B2Gold
BTG
$6.7B
| $419K | ﹤0.01% |
84,580
-89,773
| -51% | -$353K |
|
Similar funds
IMC Chicago's Q3 2025 Portfolio in Review
As of Q3 2025, IMC Chicago held 4,045 positions worth $275B, up 22% from $225B the previous quarter. Its ten largest holdings account for 38% of the portfolio.
IMC Chicago deployed $23.7B of net new capital in Q3 2025, opening 783 new positions and adding to 1,843 existing holdings. Its largest new stake was Netflix: 666,120 shares worth $79.9M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 0.39% of assets, up from 0.25% a quarter earlier, followed by Technology and Communication Services.
On the sell side, the largest reduction was State Street SPDR Dow Jones Industrial Average ETF Trust, an estimated $135M trimmed.
- IMC Chicago's largest Q3 2025 buy was Netflix: 666,120 shares worth $79.9M.
- IMC Chicago added most to Invesco QQQ Trust in Q3 2025, an estimated $203M increase.
- IMC Chicago's biggest Q3 2025 reduction was State Street SPDR Dow Jones Industrial Average ETF Trust, cutting an estimated $135M.
- IMC Chicago fully exited Apple in Q3 2025, selling an estimated $167M.
- IMC Chicago's ten largest holdings make up 38% of its $275B portfolio in Q3 2025.
- IMC Chicago opened 783 new positions and closed 492 in Q3 2025.
- IMC Chicago's portfolio value rose 22% quarter-over-quarter to $275B.
Based on IMC Chicago's 13F filing for Q3 2025, filed 4 Nov 2025.