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 | |
|---|---|---|---|---|---|---|
1126
CALL
Element Solutions
ESI
$9.12B
| $5.7M | 0.01% |
234,600
+104,900
| +81% | +$2.48M |
|
1127
PUT
Norfolk Southern
NSC
$78.8B
| $5.69M | 0.01% |
19,100
+8,700
| +84% | +$2.43M |
|
|
CALY
1128
CALL
Callaway Golf Company
CALY
$3.26B
| $5.68M | 0.01% |
207,100
+36,000
| +21% | +$1,000K |
|
1129
CALL
Diageo
DEO
$46.2B
| $5.68M | 0.01% |
25,800
-2,300
| -8% | -$472K |
|
1130
CALL
Blackstone Mortgage Trust
BXMT
$2.82B
| $5.68M | 0.01% |
185,400
+28,100
| +18% | +$893K |
|
1131
CALL
Western Union
WU
$2.57B
| $5.67M | 0.01% |
317,900
+191,000
| +151% | +$3.52M |
|
1132
CALL
Digital Realty Trust
DLR
$73.7B
| $5.66M | 0.01% |
32,000
+12,700
| +66% | +$2.03M |
|
1133
CALL
IQVIA
IQV
$34.7B
| $5.64M | 0.01% |
20,000
+14,000
| +233% | +$3.63M |
|
|
MIME
1134
CALL
DELISTED
Mimecast Limited
MIME
| $5.63M | 0.01% |
70,800
+67,100
| +1,814% | +$5.06M |
|
1135
CALL
Steel Dynamics
STLD
$35.6B
| $5.63M | 0.01% |
90,700
-44,700
| -33% | -$2.8M |
|
1136
PUT
CRISPR Therapeutics
CRSP
$4.58B
| $5.62M | 0.01% |
74,200
-1,200
| -2% | -$105K |
|
|
FPAC
1137
CALL
DELISTED
Far Peak Acquisition Corporation
FPAC
| $5.62M | 0.01% |
558,600
+310,900
| +126% | +$3.2M |
|
1138
PUT
ScottsMiracle-Gro
SMG
$4.03B
| $5.62M | 0.01% |
34,900
+12,100
| +53% | +$1.87M |
|
1139
PUT
On Holding
ONON
$11.9B
| $5.6M | 0.01% |
+148,200
| New | +$5.44M |
|
1140
PUT
Trip.com Group
TCOM
$27.5B
| $5.59M | 0.01% |
227,200
+4,200
| +2% | +$119K |
|
1141
PUT
3D Systems Corp
DDD
$420M
| $5.59M | 0.01% |
259,600
+164,700
| +174% | +$4.16M |
|
1142
PUT
United Microelectronic
UMC
$48.9B
| $5.59M | 0.01% |
477,500
+259,600
| +119% | +$2.89M |
|
|
BRSL
1143
CALL
Brightstar Lottery PLC
BRSL
$1.91B
| $5.58M | 0.01% |
193,100
+87,500
| +83% | +$2.48M |
|
1144
PUT
Aramark
ARMK
$15B
| $5.58M | 0.01% |
209,689
-74,652
| -26% | -$1.95M |
|
|
IRBT
1145
PUT
DELISTED
iRobot
IRBT
| $5.55M | 0.01% |
84,300
+19,000
| +29% | +$1.5M |
|
1146
PUT
Martin Marietta Materials
MLM
$33.6B
| $5.55M | 0.01% |
12,600
+4,700
| +59% | +$1.91M |
|
|
AVLR
1147
PUT
DELISTED
Avalara, Inc.
AVLR
| $5.54M | 0.01% |
42,900
+9,600
| +29% | +$1.5M |
|
1148
Mastercard
MA
$477B
| $5.52M | 0.01% |
15,366
-34,936
| -69% | -$12.1M |
|
1149
Twilio
TWLO
$29.1B
| $5.51M | 0.01% |
20,931
+19,588
| +1,459% | +$5.86M |
|
1150
CALL
SkinHealth Systems
SKIN
$94.9M
| $5.51M | 0.01% |
228,000
+128,400
| +129% | +$3.31M |
|
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.