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 | |
|---|---|---|---|---|---|---|
1826
PUT
Rithm Capital
RITM
$5.09B
| $1.88M | ﹤0.01% |
1,891
+457
| +32% | +$4.04K |
|
1827
CALL
Avantor
AVTR
$7.81B
| $1.88M | ﹤0.01% |
667
-641
| -49% | -$16.5K |
|
1828
CALL
Ralph Lauren
RL
$22.2B
| $1.88M | ﹤0.01% |
181
-181
| -50% | -$15.2K |
|
|
SNP
1829
PUT
DELISTED
CHINA PETROLEUM & CHEMICAL CORPORATION ADS (REP 100 ORDINARY H SHARES)
SNP
| $1.88M | ﹤0.01% |
421
-566
| -57% | -$24.4K |
|
1830
CALL
Coeur Mining
CDE
$15.6B
| $1.88M | ﹤0.01% |
1,813
+647
| +55% | +$5.31K |
|
1831
PUT
Ziff Davis
ZD
$1.9B
| $1.88M | ﹤0.01% |
221
+151
| +216% | +$10.9K |
|
1832
Sabre
SABR
$656M
| $1.87M | ﹤0.01% |
155,953
-149,202
| -49% | -$1.38M |
|
1833
CALL
Stem
STEM
$49.2M
| $1.87M | ﹤0.01% |
+46
| New | +$11.6K |
|
1834
PUT
Brinker International
EAT
$8.02B
| $1.87M | ﹤0.01% |
331
-381
| -54% | -$18.8K |
|
1835
PUT
Targa Resources
TRGP
$60.4B
| $1.87M | ﹤0.01% |
710
+371
| +109% | +$7.9K |
|
1836
CALL
Verisk Analytics
VRSK
$26.4B
| $1.87M | ﹤0.01% |
90
+79
| +718% | +$15.4K |
|
1837
BioCryst Pharmaceuticals
BCRX
$2.37B
| $1.87M | ﹤0.01% |
250,512
+224,394
| +859% | +$1.16M |
|
1838
CALL
Celsius Holdings
CELH
$6.93B
| $1.87M | ﹤0.01% |
1,113
+852
| +326% | +$8.51K |
|
1839
PUT
Dillards
DDS
$8.87B
| $1.87M | ﹤0.01% |
296
+38
| +15% | +$1.86K |
|
1840
CALL
e.l.f. Beauty
ELF
$4.56B
| $1.87M | ﹤0.01% |
741
-395
| -35% | -$8.49K |
|
|
GRMN
1841
PUT
Garmin
GRMN
$46.9B
| $1.87M | ﹤0.01% |
156
-202
| -56% | -$22.4K |
|
1842
PUT
Canadian Natural Resources
CNQ
$96.9B
| $1.86M | ﹤0.01% |
1,581
+386
| +32% | +$3.88K |
|
1843
CALL
EQT Corp
EQT
$33.2B
| $1.86M | ﹤0.01% |
1,464
+540
| +58% | +$7.78K |
|
|
CEQP
1844
CALL
DELISTED
Crestwood Equity Partners LP
CEQP
| $1.86M | ﹤0.01% |
980
-447
| -31% | -$7.31K |
|
1845
CALL
Huntington Ingalls Industries
HII
$11.3B
| $1.86M | ﹤0.01% |
109
-44
| -29% | -$6.99K |
|
1846
Simon Property Group
SPG
$74.5B
| $1.86M | ﹤0.01% |
21,785
-13,636
| -38% | -$1.04M |
|
1847
Invesco DB US Dollar Index Bearish Fund
UDN
$107M
| $1.86M | ﹤0.01% |
85,308
-16,166
| -16% | -$344K |
|
1848
PUT
Aecom
ACM
$9.07B
| $1.86M | ﹤0.01% |
373
+187
| +101% | +$8.94K |
|
|
MYOV
1849
PUT
DELISTED
Myovant Sciences Ltd.
MYOV
| $1.85M | ﹤0.01% |
671
-234
| -26% | -$4.55K |
|
|
PLAN
1850
CALL
DELISTED
Anaplan, Inc.
PLAN
| $1.85M | ﹤0.01% |
258
-611
| -70% | -$39.7K |
|
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.