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 | |
|---|---|---|---|---|---|---|
826
Becton Dickinson
BDX
$42.2B
| $6.33M | 0.01% |
25,939
+23,713
| +1,065% | +$5.53M |
|
827
PUT
CRISPR Therapeutics
CRSP
$4.7B
| $6.32M | 0.01% |
413
+59
| +17% | +$6.97K |
|
828
CALL
Digital Turbine
APPS
$982M
| $6.32M | 0.01% |
1,117
+590
| +112% | +$24.2K |
|
829
PUT
XPO
XPO
$25.1B
| $6.3M | 0.01% |
1,530
-552
| -27% | -$20K |
|
830
CALL
Burlington
BURL
$21.3B
| $6.3M | 0.01% |
241
+23
| +11% | +$5.12K |
|
831
Home Depot
HD
$323B
| $6.29M | 0.01% |
+23,687
| New | +$6.51M |
|
832
ProShares Ultra S&P500
SSO
$7.79B
| $6.26M | 0.01% |
274,324
+88,076
| +47% | +$1.81M |
|
833
CALL
Cleveland-Cliffs
CLF
$6.27B
| $6.26M | 0.01% |
4,300
+1,375
| +47% | +$13.9K |
|
834
PUT
NetApp
NTAP
$32.1B
| $6.26M | 0.01% |
945
-444
| -32% | -$23.5K |
|
835
PUT
Tractor Supply
TSCO
$15.6B
| $6.25M | 0.01% |
2,225
-3,885
| -64% | -$109K |
|
836
CALL
Cognizant
CTSH
$20.2B
| $6.24M | 0.01% |
762
-744
| -49% | -$56.6K |
|
837
CALL
Zoetis
ZTS
$30.9B
| $6.24M | 0.01% |
377
+84
| +29% | +$13.7K |
|
838
CALL
PTC
PTC
$13.1B
| $6.23M | 0.01% |
521
+41
| +9% | +$4.08K |
|
839
PUT
Dropbox
DBX
$6.55B
| $6.21M | 0.01% |
2,800
+18
| +0.6% | +$367 |
|
840
PUT
The Mosaic Company
MOS
$7.06B
| $6.19M | 0.01% |
2,690
+818
| +44% | +$16.5K |
|
841
CALL
United States Natural Gas Fund
UNG
$474M
| $6.19M | 0.01% |
1,681
+200
| +14% | +$8.63K |
|
|
IPFF
842
CALL
DELISTED
iShares International Preferred Stock ETF
IPFF
| $6.17M | 0.01% |
1,351
+758
| +128% | +$11.2K |
|
843
PUT
State Street SPDR Portfolio Europe ETF
SPEU
$707M
| $6.16M | 0.01% |
1,467
+55
| +4% | +$1.93K |
|
844
PUT
VeriSign
VRSN
$23.5B
| $6.14M | 0.01% |
284
+171
| +151% | +$35K |
|
845
PUT
Regency Centers
REG
$14.9B
| $6.14M | 0.01% |
1,346
-54
| -4% | -$2.32K |
|
846
PUT
Five Below
FIVE
$11B
| $6.11M | 0.01% |
349
+176
| +102% | +$26.1K |
|
|
847
PUT
Zoetis
ZTS
$30.9B
| $6.06M | 0.01% |
366
+225
| +160% | +$36.6K |
|
848
PUT
State Street
STT
$50.7B
| $6.05M | 0.01% |
831
+344
| +71% | +$23.4K |
|
|
COUP
849
DELISTED
Coupa Software Incorporated
COUP
| $6.04M | 0.01% |
+17,814
| New | +$5.51M |
|
850
CALL
Qorvo
QRVO
$7.61B
| $6.04M | 0.01% |
363
-303
| -45% | -$44.6K |
|
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.