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 | |
|---|---|---|---|---|---|---|
|
SIX
901
CALL
DELISTED
Six Flags Entertainment Corp.
SIX
| $5.69M | 0.01% |
1,668
+882
| +112% | +$24.2K |
|
902
CALL
PagSeguro Digital
PAGS
$2.64B
| $5.68M | 0.01% |
999
-188
| -16% | -$8.44K |
|
903
CALL
GameStop
GME
$9.58B
| $5.68M | 0.01% |
12,052
+1,360
| +13% | +$4.68K |
|
|
FTCH
904
CALL
DELISTED
Farfetch Limited Class A Ordinary Shares
FTCH
| $5.67M | 0.01% |
888
-444
| -33% | -$19.6K |
|
905
CALL
Xcel Energy
XEL
$50.4B
| $5.66M | 0.01% |
849
+782
| +1,167% | +$54.5K |
|
906
PUT
SAP
SAP
$171B
| $5.66M | 0.01% |
434
+189
| +77% | +$24.4K |
|
|
BBBY
907
PUT
DELISTED
Bed Bath & Beyond Inc
BBBY
| $5.66M | 0.01% |
3,185
+490
| +18% | +$10.2K |
|
908
CALL
StoneCo
STNE
$2.67B
| $5.63M | 0.01% |
671
-713
| -52% | -$47.8K |
|
909
CALL
F5
FFIV
$21.9B
| $5.63M | 0.01% |
320
+201
| +169% | +$30.5K |
|
910
PUT
BioMarin Pharmaceuticals
BMRN
$11.4B
| $5.63M | 0.01% |
642
-164
| -20% | -$13K |
|
911
CALL
Chegg
CHGG
$109M
| $5.63M | 0.01% |
623
-316
| -34% | -$25.1K |
|
912
PUT
Keurig Dr Pepper
KDP
$40.4B
| $5.63M | 0.01% |
1,758
+1,286
| +272% | +$38.1K |
|
913
CALL
Alaska Air
ALK
$4.99B
| $5.61M | 0.01% |
1,079
-8
| -0.7% | -$360 |
|
914
PUT
Vulcan Materials
VMC
$35.7B
| $5.59M | 0.01% |
377
-74
| -16% | -$10.6K |
|
915
CALL
Cerence
CRNC
$398M
| $5.58M | 0.01% |
555
-246
| -31% | -$18.3K |
|
916
PUT
Travel + Leisure Co
TNL
$4.5B
| $5.58M | 0.01% |
1,243
+1,190
| +2,245% | +$46.7K |
|
917
CALL
Calix
CALX
$2.28B
| $5.57M | 0.01% |
1,873
+1,447
| +340% | +$35.7K |
|
|
PSTH
918
PUT
DELISTED
Pershing Square Tontine Holdings, Ltd.
PSTH
| $5.57M | 0.01% |
2,050
+523
| +34% | +$12.6K |
|
919
Trade Desk
TTD
$7.89B
| $5.56M | 0.01% |
69,470
+56,150
| +422% | +$4.24M |
|
|
RWT
920
PUT
Redwood Trust
RWT
$614M
| $5.54M | 0.01% |
6,314
+2,202
| +54% | +$18.9K |
|
921
CALL
Darden Restaurants
DRI
$22.2B
| $5.54M | 0.01% |
465
-292
| -39% | -$31.3K |
|
922
CALL
Teva Pharmaceuticals
TEVA
$36.3B
| $5.53M | 0.01% |
5,732
-1,172
| -17% | -$11.2K |
|
923
PUT
Universal Display
OLED
$3.71B
| $5.51M | 0.01% |
240
-281
| -54% | -$60K |
|
|
CLDR
924
CALL
DELISTED
Cloudera, Inc.
CLDR
| $5.51M | 0.01% |
3,964
+173
| +5% | +$1.98K |
|
925
CALL
EPR Properties
EPR
$4.74B
| $5.5M | 0.01% |
1,694
+636
| +60% | +$18.7K |
|
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.