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 | |
|---|---|---|---|---|---|---|
4676
Artivion
AORT
$1.34B
| $189K | ﹤0.01% |
8,032
+6,111
| +318% | +$124K |
|
|
EFC
4677
PUT
Ellington Financial
EFC
$1.69B
| $189K | ﹤0.01% |
128
-29
| -18% | -$404 |
|
4678
PUT
iRhythm Holdings
IRTC
$4.02B
| $189K | ﹤0.01% |
8
-20
| -71% | -$4.56K |
|
4679
PUT
Ironwood Pharmaceuticals
IRWD
$586M
| $189K | ﹤0.01% |
166
-77
| -32% | -$843 |
|
4680
PUT
Jefferies Financial Group
JEF
$12.7B
| $189K | ﹤0.01% |
81
+41
| +103% | +$860 |
|
|
NOVA
4681
PUT
DELISTED
Sunnova Energy
NOVA
| $189K | ﹤0.01% |
42
-33
| -44% | -$1.15K |
|
4682
CALL
Q2 Holdings
QTWO
$3.78B
| $189K | ﹤0.01% |
15
-9
| -38% | -$969 |
|
|
PDCO
4683
PUT
DELISTED
Patterson Companies, Inc.
PDCO
| $189K | ﹤0.01% |
64
-53
| -45% | -$1.5K |
|
|
TELL
4684
CALL
DELISTED
Tellurian Inc.
TELL
| $189K | ﹤0.01% |
1,484
+34
| +2% | +$38 |
|
|
CAMP
4685
CALL
DELISTED
CalAmp Corp.
CAMP
| $189K | ﹤0.01% |
8
+6
| +300% | +$1.21K |
|
4686
Frontline
FRO
$8.71B
| $188K | ﹤0.01% |
30,321
-74,194
| -71% | -$477K |
|
|
GDEN
4687
CALL
DELISTED
Golden Entertainment
GDEN
| $188K | ﹤0.01% |
95
+83
| +692% | +$1.33K |
|
4688
Global Partners
GLP
$1.65B
| $188K | ﹤0.01% |
11,360
+8,760
| +337% | +$139K |
|
4689
PUT
Mativ Holdings
MATV
$479M
| $188K | ﹤0.01% |
47
| – | – |
|
|
IAA
4690
CALL
DELISTED
IAA, Inc. Common Stock
IAA
| $188K | ﹤0.01% |
29
-104
| -78% | -$6.23K |
|
4691
PUT
Cal-Maine
CALM
$4.43B
| $187K | ﹤0.01% |
50
-202
| -80% | -$7.77K |
|
4692
CDW
CDW
$18.9B
| $187K | ﹤0.01% |
+1,419
| New | +$186K |
|
4693
CALL
G-III Apparel Group
GIII
$1.54B
| $187K | ﹤0.01% |
79
-31
| -28% | -$575 |
|
|
4694
PUT
Global Partners
GLP
$1.65B
| $187K | ﹤0.01% |
113
+42
| +59% | +$666 |
|
4695
CALL
ImmunityBio
IBRX
$7.15B
| $187K | ﹤0.01% |
141
-147
| -51% | -$1.41K |
|
4696
CALL
Icahn Enterprises
IEP
$5.1B
| $187K | ﹤0.01% |
37
-32
| -46% | -$1.63K |
|
4697
Opendoor
OPEN
$3.54B
| $187K | ﹤0.01% |
8,534
-13,007
| -60% | -$273K |
|
4698
Waters Corp
WAT
$37.3B
| $187K | ﹤0.01% |
758
+279
| +58% | +$63.2K |
|
|
PACW
4699
PUT
DELISTED
PacWest Bancorp
PACW
| $187K | ﹤0.01% |
74
-140
| -65% | -$3.12K |
|
|
SPPI
4700
DELISTED
Spectrum Pharmaceuticals Inc
SPPI
| $187K | ﹤0.01% |
54,993
+44,388
| +419% | +$183K |
|
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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.