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 |
Alibaba
BABA
|
+$39.9M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$39M |
| 3 |
Mastercard
MA
|
+$31.3M |
| 4 |
Apple
AAPL
|
+$25.3M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$25.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
JPMorgan Chase
JPM
|
+$52.8M |
| 2 |
TSMC
TSM
|
+$43M |
| 3 |
Amazon
AMZN
|
+$24.7M |
| 4 |
iShares Silver Trust
SLV
|
+$24.2M |
| 5 |
Netflix
NFLX
|
+$21.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 0.65% |
| 2 | Technology | 0.37% |
| 3 | Healthcare | 0.33% |
| 4 | Industrials | 0.21% |
| 5 | Communication Services | 0.19% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
EBIX
4176
PUT
DELISTED
Ebix Inc
EBIX
| $280K | ﹤0.01% |
74
+57
| +335% | +$1.6K |
|
4177
PUT
Donaldson
DCI
$11.1B
| $279K | ﹤0.01% |
+50
| New | +$2.64K |
|
4178
CALL
Essential Properties Realty Trust
EPRT
$6.94B
| $279K | ﹤0.01% |
132
-42
| -24% | -$822 |
|
4179
Progress Software
PRGS
$1.66B
| $279K | ﹤0.01% |
6,194
+5,046
| +440% | +$204K |
|
|
TCP
4180
PUT
DELISTED
TC Pipelines LP
TCP
| $279K | ﹤0.01% |
+95
| New | +$2.83K |
|
4181
CALL
Bank OZK
OZK
$5.62B
| $278K | ﹤0.01% |
89
-400
| -82% | -$10.8K |
|
4182
CALL
Reinsurance Group of America
RGA
$15.9B
| $278K | ﹤0.01% |
24
+12
| +100% | +$1.34K |
|
|
TWNK
4183
CALL
DELISTED
Hostess Brands, Inc. Class A Common Stock
TWNK
| $278K | ﹤0.01% |
190
+63
| +50% | +$848 |
|
4184
CALL
Archrock
AROC
$6.19B
| $277K | ﹤0.01% |
321
+229
| +249% | +$1.67K |
|
|
DVAX
4185
PUT
DELISTED
Dynavax Technologies
DVAX
| $277K | ﹤0.01% |
624
+57
| +10% | +$258 |
|
4186
PUT
Warrior Met Coal
HCC
$4.17B
| $277K | ﹤0.01% |
130
+89
| +217% | +$1.56K |
|
4187
Prospect Capital
PSEC
$1.12B
| $277K | ﹤0.01% |
51,208
-19,438
| -28% | -$102K |
|
4188
CALL
Atmos Energy
ATO
$29.9B
| $276K | ﹤0.01% |
29
+18
| +164% | +$1.74K |
|
4189
CALL
The Greenbrier Companies
GBX
$1.6B
| $276K | ﹤0.01% |
76
-129
| -63% | -$4.26K |
|
4190
CALL
MYR Group
MYRG
$5.31B
| $276K | ﹤0.01% |
+46
| New | +$2.29K |
|
4191
Rithm Capital
RITM
$5.46B
| $276K | ﹤0.01% |
27,781
-27,406
| -50% | -$242K |
|
4192
iShares Global Clean Energy ETF
ICLN
$2.27B
| $275K | ﹤0.01% |
9,744
-12,066
| -55% | -$271K |
|
|
SPNS
4193
PUT
DELISTED
Sapiens International
SPNS
| $275K | ﹤0.01% |
+90
| New | +$2.64K |
|
|
ARNA
4194
DELISTED
Arena Pharmaceuticals Inc
ARNA
| $275K | ﹤0.01% |
3,583
+1,751
| +96% | +$131K |
|
4195
Customers Bancorp
CUBI
$2.69B
| $274K | ﹤0.01% |
15,075
+6,815
| +83% | +$108K |
|
4196
Dell
DELL
$253B
| $274K | ﹤0.01% |
+7,397
| New | +$258K |
|
4197
CALL
Global Net Lease
GNL
$1.86B
| $274K | ﹤0.01% |
160
+122
| +321% | +$2K |
|
4198
PUT
La-Z-Boy
LZB
$1.65B
| $274K | ﹤0.01% |
69
-73
| -51% | -$2.7K |
|
4199
Comstock Resources
CRK
$3.64B
| $273K | ﹤0.01% |
62,676
-13,211
| -17% | -$65.4K |
|
4200
PUT
Element Solutions
ESI
$8.89B
| $273K | ﹤0.01% |
154
+153
| +15,300% | +$2.12K |
|
Similar funds
Simplex Trading's Q4 2020 Portfolio in Review
As of Q4 2020, Simplex Trading held 9,568 positions worth $77.2B, up 5% from $73.5B the previous quarter. Its ten largest holdings account for 42% of the portfolio.
Simplex Trading's Q4 2020 filing shows 1,711 new, 3,402 increased, 3,106 reduced and 1,157 closed positions. Its largest new stake was Alibaba: 143,630 shares worth $33.4M. The largest sale was JPMorgan Chase, an estimated $52.8M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 0.65% of assets, up from 0.53% a quarter earlier, followed by Technology and Healthcare.
- Simplex Trading's largest Q4 2020 buy was Alibaba: 143,630 shares worth $33.4M.
- Simplex Trading added most to Invesco QQQ Trust in Q4 2020, an estimated $39M increase.
- Simplex Trading's biggest Q4 2020 reduction was JPMorgan Chase, cutting an estimated $52.8M.
- Simplex Trading fully exited Target in Q4 2020, selling an estimated $14.3M.
- Simplex Trading's ten largest holdings make up 42% of its $77.2B portfolio in Q4 2020.
- Simplex Trading opened 1,711 new positions and closed 1,157 in Q4 2020.
- Simplex Trading's portfolio value rose 5% quarter-over-quarter to $77.2B.
Based on Simplex Trading's 13F filing for Q4 2020, filed 2 Feb 2021.