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 | |
|---|---|---|---|---|---|---|
|
FLNT
4051
CALL
Fluent
FLNT
$102M
| $304K | ﹤0.01% |
96
+65
| +210% | +$1.28K |
|
4052
Kodak
KODK
$812M
| $304K | ﹤0.01% |
+37,415
| New | +$312K |
|
4053
PUT
Laureate Education
LAUR
$5.28B
| $304K | ﹤0.01% |
+209
| New | +$2.95K |
|
4054
Neogen
NEOG
$2B
| $304K | ﹤0.01% |
+7,690
| New | +$286K |
|
4055
Rigel Pharmaceuticals
RIGL
$712M
| $304K | ﹤0.01% |
8,708
+5,509
| +172% | +$159K |
|
|
TGNA
4056
PUT
DELISTED
TEGNA Inc
TGNA
| $304K | ﹤0.01% |
218
-288
| -57% | -$3.85K |
|
4057
PUT
Casey's General Stores
CASY
$31.7B
| $303K | ﹤0.01% |
17
-11
| -39% | -$2K |
|
4058
Franklin Covey
FC
$248M
| $303K | ﹤0.01% |
+13,642
| New | +$284K |
|
4059
PUT
Halozyme
HALO
$9.9B
| $303K | ﹤0.01% |
71
-98
| -58% | -$3.52K |
|
4060
CALL
Centrus Energy
LEU
$3.34B
| $303K | ﹤0.01% |
+131
| New | +$1.83K |
|
4061
PUT
Otis Worldwide
OTIS
$28B
| $303K | ﹤0.01% |
45
-55
| -55% | -$3.57K |
|
4062
Rhythm Pharmaceuticals
RYTM
$7.41B
| $303K | ﹤0.01% |
10,200
+5,415
| +113% | +$138K |
|
4063
PUT
Alexandria Real Estate Equities
ARE
$9.41B
| $302K | ﹤0.01% |
17
+5
| +42% | +$826 |
|
4064
CALL
EverQuote
EVER
$960M
| $302K | ﹤0.01% |
81
+33
| +69% | +$1.25K |
|
4065
Snap-on
SNA
$21.7B
| $302K | ﹤0.01% |
+1,768
| New | +$296K |
|
|
WIRE
4066
PUT
DELISTED
Encore Wire Corp
WIRE
| $302K | ﹤0.01% |
+50
| New | +$2.58K |
|
|
NGHC
4067
DELISTED
National General Holdings Corp
NGHC
| $302K | ﹤0.01% |
+8,856
| New | +$302K |
|
|
HDS
4068
CALL
DELISTED
HD Supply Holdings, Inc.
HDS
| $302K | ﹤0.01% |
54
-115
| -68% | -$5.58K |
|
4069
Invesco DB Commodity Index Tracking Fund
DBC
$1.65B
| $301K | ﹤0.01% |
20,508
-32,970
| -62% | -$450K |
|
4070
Pentair
PNR
$10.8B
| $301K | ﹤0.01% |
+5,674
| New | +$291K |
|
4071
CACI
CACI
$11.3B
| $300K | ﹤0.01% |
1,206
+994
| +469% | +$229K |
|
4072
PUT
Federated Hermes
FHI
$4.59B
| $300K | ﹤0.01% |
104
+46
| +79% | +$1.22K |
|
4073
VanEck High Yield Muni ETF
HYD
$4.45B
| $300K | ﹤0.01% |
4,877
+1,231
| +34% | +$74.3K |
|
4074
PUT
Ingersoll Rand
IR
$33.9B
| $300K | ﹤0.01% |
66
-497
| -88% | -$20.6K |
|
|
RC
4075
CALL
Ready Capital
RC
$261M
| $300K | ﹤0.01% |
241
+213
| +761% | +$2.62K |
|
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.