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 | |
|---|---|---|---|---|---|---|
|
FLG
3801
CALL
Flagstar Bank National Association
FLG
$5.83B
| $374K | ﹤0.01% |
118
-80
| -40% | -$2.21K |
|
3802
PUT
Invesco
IVZ
$13B
| $373K | ﹤0.01% |
214
-10
| -4% | -$154 |
|
3803
PUT
Orion
OEC
$400M
| $373K | ﹤0.01% |
218
+18
| +9% | +$275 |
|
3804
CALL
Lufax Holding
LU
$1.33B
| $372K | ﹤0.01% |
+66
| New | +$3.95K |
|
3805
Realty Income
O
$61.3B
| $372K | ﹤0.01% |
6,184
-15,644
| -72% | -$925K |
|
3806
CALL
Textron
TXT
$15.6B
| $372K | ﹤0.01% |
77
+1
| +1% | +$42 |
|
|
ME
3807
CALL
DELISTED
23andMe Holding Co
ME
| $372K | ﹤0.01% |
+16
| New | +$3.58K |
|
3808
PUT
Alpha and Omega Semiconductor
AOSL
$863M
| $371K | ﹤0.01% |
157
+150
| +2,143% | +$3.06K |
|
3809
CALL
Bally's
BALY
$720M
| $371K | ﹤0.01% |
74
+73
| +7,300% | +$2.56K |
|
3810
Direxion Daily Regional Banks Bull 3X ETF
DPST
$477M
| $371K | ﹤0.01% |
+1,547
| New | +$271K |
|
3811
PUT
Waters Corp
WAT
$37.7B
| $371K | ﹤0.01% |
15
-128
| -90% | -$29K |
|
|
UFOX
3812
Defiance Space and Connective Tech ETF
UFOX
$825M
| $371K | ﹤0.01% |
+11,049
| New | +$345K |
|
|
LADR
3813
Ladder Capital
LADR
$1.26B
| $370K | ﹤0.01% |
37,861
-41,457
| -52% | -$352K |
|
3814
CALL
Dolby
DLB
$4.97B
| $369K | ﹤0.01% |
38
+5
| +15% | +$413 |
|
3815
CALL
BCE
BCE
$20.3B
| $368K | ﹤0.01% |
86
-446
| -84% | -$19.1K |
|
|
XIFR
3816
CALL
XPLR Infrastructure LP
XIFR
$1.11B
| $368K | ﹤0.01% |
55
-176
| -76% | -$11.3K |
|
|
DENN
3817
PUT
DELISTED
Denny's
DENN
| $367K | ﹤0.01% |
250
-84
| -25% | -$962 |
|
|
LMNX
3818
PUT
DELISTED
Luminex Corp
LMNX
| $367K | ﹤0.01% |
159
+84
| +112% | +$1.95K |
|
3819
PUT
Curis
CRIS
$9.41M
| $366K | ﹤0.01% |
+1
| New | +$1.2K |
|
3820
CALL
Pembina Pipeline
PBA
$29B
| $366K | ﹤0.01% |
155
-211
| -58% | -$4.96K |
|
|
CURO
3821
CALL
DELISTED
CURO Group Holdings Corp.
CURO
| $366K | ﹤0.01% |
256
+230
| +885% | +$2.12K |
|
|
WBT
3822
DELISTED
Welbilt, Inc.
WBT
| $366K | ﹤0.01% |
27,728
+14,869
| +116% | +$133K |
|
3823
Sunstone Hotel Investors
SHO
$2.19B
| $365K | ﹤0.01% |
32,222
+25,413
| +373% | +$243K |
|
|
LCI
3824
PUT
DELISTED
Lannett Company, Inc.
LCI
| $365K | ﹤0.01% |
140
-18
| -11% | -$470 |
|
3825
American Airlines Group
AAL
$10.2B
| $364K | ﹤0.01% |
23,090
+22,840
| +9,136% | +$316K |
|
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.