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 | |
|---|---|---|---|---|---|---|
|
CPE
1951
DELISTED
Callon Petroleum Company
CPE
| $2.17M | ﹤0.01% |
45,969
+44,372
| +2,778% | +$2.37M |
|
1952
CALL
Arthur J. Gallagher & Co
AJG
$63.7B
| $2.17M | ﹤0.01% |
12,800
+6,300
| +97% | +$1.03M |
|
1953
PUT
Enovix
ENVX
$862M
| $2.17M | ﹤0.01% |
+90,743
| New | +$2.2M |
|
1954
PUT
JB Hunt Transport Services
JBHT
$27.1B
| $2.17M | ﹤0.01% |
10,600
+1,600
| +18% | +$308K |
|
1955
PUT
Westlake Corp
WLK
$9.46B
| $2.17M | ﹤0.01% |
22,300
-39,600
| -64% | -$3.86M |
|
1956
Aurinia Pharmaceuticals
AUPH
$1.97B
| $2.16M | ﹤0.01% |
94,641
+6,944
| +8% | +$165K |
|
1957
CALL
iQIYI
IQ
$1.18B
| $2.16M | ﹤0.01% |
474,000
-182,800
| -28% | -$1.29M |
|
1958
CALL
Waters Corp
WAT
$36.8B
| $2.16M | ﹤0.01% |
5,800
+2,900
| +100% | +$1.01M |
|
|
EXE
1959
PUT
Expand Energy Corp
EXE
$21.9B
| $2.16M | ﹤0.01% |
33,500
+20,800
| +164% | +$1.32M |
|
1960
TG Therapeutics
TGTX
$8.58B
| $2.16M | ﹤0.01% |
113,598
+79,651
| +235% | +$2.07M |
|
|
RDS.A
1961
DELISTED
Royal Dutch Shell PLC ADS Class A
RDS.A
| $2.16M | ﹤0.01% |
49,734
-18,706
| -27% | -$845K |
|
|
WWE
1962
CALL
DELISTED
World Wrestling Entertainment
WWE
| $2.16M | ﹤0.01% |
43,700
-35,400
| -45% | -$1.93M |
|
1963
PUT
Planet Fitness
PLNT
$4.23B
| $2.15M | ﹤0.01% |
23,800
-53,000
| -69% | -$4.52M |
|
|
TBHC
1964
PUT
DELISTED
The Brand House Collective
TBHC
| $2.15M | ﹤0.01% |
144,300
-80,600
| -36% | -$1.66M |
|
1965
CALL
SelectQuote
SLQT
$114M
| $2.15M | ﹤0.01% |
237,500
+138,100
| +139% | +$1.51M |
|
|
GREE
1966
CALL
Vulcan Infrastructure and Power Inc. Class A Common Stock
GREE
| $2.15M | ﹤0.01% |
+13,400
| New | +$2.81M |
|
1967
CALL
Huntington Ingalls Industries
HII
$11.3B
| $2.15M | ﹤0.01% |
11,500
-11,300
| -50% | -$2.18M |
|
|
VLRS
1968
CALL
Controladora Vuela Compania de Aviacion
VLRS
$876M
| $2.13M | ﹤0.01% |
118,800
+87,500
| +280% | +$1.57M |
|
1969
CALL
Microvision
MVIS
$88.2M
| $2.13M | ﹤0.01% |
425,800
-93,400
| -18% | -$743K |
|
1970
CALL
Dell
DELL
$283B
| $2.13M | ﹤0.01% |
110,400
-308,665
| -74% | -$17.2M |
|
1971
CALL
GDS Holdings
GDS
$6.34B
| $2.13M | ﹤0.01% |
45,100
+27,200
| +152% | +$1.5M |
|
1972
MBIA
MBI
$288M
| $2.13M | ﹤0.01% |
134,621
+133,512
| +12,039% | +$1.76M |
|
1973
PUT
Cerence
CRNC
$382M
| $2.12M | ﹤0.01% |
27,700
+18,100
| +189% | +$1.6M |
|
|
SIX
1974
PUT
DELISTED
Six Flags Entertainment Corp.
SIX
| $2.12M | ﹤0.01% |
49,800
+3,100
| +7% | +$129K |
|
1975
CALL
AerCap
AER
$23.9B
| $2.12M | ﹤0.01% |
32,400
-79,800
| -71% | -$4.94M |
|
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.