Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street Financial Select Sector SPDR ETF
XLF
|
+$42.6M |
| 2 |
Shopify
SHOP
|
+$39.6M |
| 3 |
iShares China Large-Cap ETF
FXI
|
+$35.4M |
| 4 |
Verizon
VZ
|
+$34.1M |
| 5 |
KraneShares CSI China Internet ETF
KWEB
|
+$34.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
AMC Entertainment Holdings
AMC
|
+$49.5M |
| 2 |
GE Aerospace
GE
|
+$35.2M |
| 3 |
Carnival Corporation Ltd
CCL
|
+$30.5M |
| 4 |
Advanced Micro Devices
AMD
|
+$28.8M |
| 5 |
Micron Technology
MU
|
+$23.7M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.61% |
| 2 | Consumer Discretionary | 0.43% |
| 3 | Healthcare | 0.35% |
| 4 | Communication Services | 0.23% |
| 5 | Financials | 0.21% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
NVMI
1976
Nova
NVMI
$13.9B
| $2.12M | ﹤0.01% |
14,467
+10,501
| +265% | +$1.27M |
|
1977
CALL
Itaú Unibanco
ITUB
$91.3B
| $2.12M | ﹤0.01% |
930,760
-169,390
| -15% | -$610K |
|
1978
CALL
Global Ship Lease
GSL
$1.57B
| $2.12M | ﹤0.01% |
+92,400
| New | +$2.11M |
|
1979
PUT
Riskified
RSKD
$672M
| $2.12M | ﹤0.01% |
+269,100
| New | +$3.85M |
|
1980
Trip.com Group
TCOM
$27.5B
| $2.11M | ﹤0.01% |
85,890
+26,098
| +44% | +$739K |
|
1981
PUT
Peabody Energy
BTU
$2.78B
| $2.11M | ﹤0.01% |
209,700
+34,200
| +19% | +$415K |
|
1982
CALL
Advance Auto Parts
AAP
$3.37B
| $2.11M | ﹤0.01% |
8,800
-55,100
| -86% | -$12.6M |
|
1983
CALL
TransUnion
TRU
$14.8B
| $2.11M | ﹤0.01% |
17,800
+15,800
| +790% | +$1.81M |
|
1984
PUT
Brunswick
BC
$5.19B
| $2.1M | ﹤0.01% |
20,900
-16,100
| -44% | -$1.58M |
|
1985
CALL
Dominion Energy
D
$62.5B
| $2.1M | ﹤0.01% |
26,800
-45,200
| -63% | -$3.4M |
|
|
CMRC
1986
CALL
Commerce.com Inc Series 1
CMRC
$224M
| $2.1M | ﹤0.01% |
59,500
+47,600
| +400% | +$2.24M |
|
1987
PUT
EVgo
EVGO
$200M
| $2.1M | ﹤0.01% |
+211,700
| New | +$2.32M |
|
|
JKS
1988
CALL
JinkoSolar
JKS
$775M
| $2.1M | ﹤0.01% |
45,800
-35,000
| -43% | -$1.81M |
|
1989
Campbell Soup
CPB
$6.51B
| $2.1M | ﹤0.01% |
48,380
+2,626
| +6% | +$109K |
|
1990
Sabre
SABR
$656M
| $2.1M | ﹤0.01% |
244,663
+183,913
| +303% | +$1.76M |
|
1991
CALL
Silicon Motion
SIMO
$9.19B
| $2.1M | ﹤0.01% |
22,100
+20,500
| +1,281% | +$1.54M |
|
1992
PUT
TransDigm Group
TDG
$69.2B
| $2.1M | ﹤0.01% |
3,300
-9,600
| -74% | -$6.01M |
|
|
BIG
1993
PUT
DELISTED
Big Lots, Inc.
BIG
| $2.1M | ﹤0.01% |
46,600
-32,500
| -41% | -$1.48M |
|
1994
United Microelectronic
UMC
$48.9B
| $2.1M | ﹤0.01% |
179,348
+124,314
| +226% | +$1.38M |
|
|
NVTA
1995
PUT
DELISTED
Invitae Corporation
NVTA
| $2.1M | ﹤0.01% |
137,200
-12,900
| -9% | -$279K |
|
1996
Marathon Petroleum
MPC
$90.3B
| $2.09M | ﹤0.01% |
32,714
-70,807
| -68% | -$4.55M |
|
1997
PUT
Copart
CPRT
$25.9B
| $2.09M | ﹤0.01% |
55,200
-36,800
| -40% | -$1.37M |
|
1998
CALL
Teucrium Soybean Fund
SOYB
$57.2M
| $2.09M | ﹤0.01% |
143,200
-31,100
| -18% | -$679K |
|
|
EMBK
1999
CALL
DELISTED
Embark Technology, Inc. Common Stock
EMBK
| $2.09M | ﹤0.01% |
+12,040
| New | +$2.2M |
|
2000
PUT
Yelp
YELP
$1.38B
| $2.09M | ﹤0.01% |
57,600
+23,700
| +70% | +$890K |
|
Similar funds
Simplex Trading's Q4 2021 Portfolio in Review
As of Q4 2021, Simplex Trading held 12,077 positions worth $99B, down 7.5% from $107B the previous quarter. Its ten largest holdings account for 33% of the portfolio.
Simplex Trading withdrew a net $10.8B in Q4 2021, closing 1,645 positions and reducing 4,258 holdings. Its most notable exit was Carnival Corporation Ltd, an estimated $30.5M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.61% of assets, up from 0.49% a quarter earlier, followed by Consumer Discretionary and Healthcare.
Against the trend, Simplex Trading opened a new position in iShares China Large-Cap ETF worth $33M.
- Simplex Trading's largest Q4 2021 buy was iShares China Large-Cap ETF: 902,666 shares worth $33M.
- Simplex Trading added most to State Street Financial Select Sector SPDR ETF in Q4 2021, an estimated $42.6M increase.
- Simplex Trading's biggest Q4 2021 reduction was AMC Entertainment Holdings, cutting an estimated $49.5M.
- Simplex Trading fully exited Carnival Corporation Ltd in Q4 2021, selling an estimated $30.5M.
- Simplex Trading's ten largest holdings make up 33% of its $99B portfolio in Q4 2021.
- Simplex Trading opened 2,269 new positions and closed 1,645 in Q4 2021.
- Simplex Trading's portfolio value fell 7.5% quarter-over-quarter to $99B.
Based on Simplex Trading's 13F filing for Q4 2021, filed 4 Feb 2022.