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 | |
|---|---|---|---|---|---|---|
2976
PUT
Post Holdings
POST
$4.15B
| $717K | ﹤0.01% |
108
+85
| +370% | +$5.25K |
|
|
BPY
2977
CALL
DELISTED
Brookfield Property Partners L.P. Limited Partnership Units
BPY
| $717K | ﹤0.01% |
496
+357
| +257% | +$5.24K |
|
2978
Conduent
CNDT
$237M
| $713K | ﹤0.01% |
148,733
+106,033
| +248% | +$443K |
|
2979
PUT
Black Hills Corp
BKH
$5.73B
| $712K | ﹤0.01% |
116
+112
| +2,800% | +$6.7K |
|
|
MIK
2980
CALL
DELISTED
Michaels Stores, Inc
MIK
| $712K | ﹤0.01% |
548
-237
| -30% | -$2.41K |
|
2981
CALL
AZZ Inc
AZZ
$4.44B
| $711K | ﹤0.01% |
+150
| New | +$6.07K |
|
2982
CALL
TTM Technologies
TTMI
$12.9B
| $711K | ﹤0.01% |
516
+456
| +760% | +$5.83K |
|
|
SUMO
2983
PUT
DELISTED
Sumo Logic, Inc. Common Stock
SUMO
| $711K | ﹤0.01% |
+249
| New | +$5.87K |
|
2984
Ascendis Pharma A/S
ASND
$16.8B
| $710K | ﹤0.01% |
4,258
+3,095
| +266% | +$512K |
|
2985
PUT
Evergy
EVRG
$20B
| $710K | ﹤0.01% |
128
+127
| +12,700% | +$6.97K |
|
2986
Advanced Drainage Systems
WMS
$10.9B
| $710K | ﹤0.01% |
8,497
+6,910
| +435% | +$490K |
|
2987
CALL
InterDigital
IDCC
$6.61B
| $709K | ﹤0.01% |
117
+84
| +255% | +$5.03K |
|
2988
PUT
UBS Group
UBS
$172B
| $709K | ﹤0.01% |
502
-1,257
| -71% | -$16.6K |
|
2989
La-Z-Boy
LZB
$1.61B
| $708K | ﹤0.01% |
+17,792
| New | +$659K |
|
|
ESPR
2990
CALL
DELISTED
Esperion Therapeutics
ESPR
| $707K | ﹤0.01% |
272
+212
| +353% | +$6.35K |
|
2991
CALL
Murphy Oil
MUR
$5.45B
| $707K | ﹤0.01% |
585
+146
| +33% | +$1.45K |
|
2992
CALL
Hubbell
HUBB
$25.5B
| $705K | ﹤0.01% |
45
-21
| -32% | -$3.22K |
|
2993
CALL
Quanta Services
PWR
$92.3B
| $705K | ﹤0.01% |
98
-100
| -51% | -$6.59K |
|
2994
Papa John's
PZZA
$1.01B
| $705K | ﹤0.01% |
+8,314
| New | +$680K |
|
|
IDEX
2995
DELISTED
Ideanomics, Inc. Common Stock
IDEX
| $705K | ﹤0.01% |
+2,836
| New | +$525K |
|
|
SWN
2996
CALL
DELISTED
Southwestern Energy Company
SWN
| $704K | ﹤0.01% |
2,366
+143
| +6% | +$421 |
|
2997
PUT
Clean Energy Fuels
CLNE
$434M
| $703K | ﹤0.01% |
895
+715
| +397% | +$2.79K |
|
2998
CALL
Regenxbio
RGNX
$645M
| $703K | ﹤0.01% |
155
+141
| +1,007% | +$4.93K |
|
2999
CALL
Republic Services
RSG
$66.8B
| $702K | ﹤0.01% |
73
-177
| -71% | -$16.8K |
|
|
PVG
3000
PUT
DELISTED
PRETIUM RESOURCES INC.
PVG
| $702K | ﹤0.01% |
612
+61
| +11% | +$734 |
|
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.