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 | |
|---|---|---|---|---|---|---|
2826
CALL
Allison Transmission
ALSN
$10.1B
| $806K | ﹤0.01% |
187
-95
| -34% | -$3.82K |
|
2827
CALL
Hancock Whitney
HWC
$6.13B
| $806K | ﹤0.01% |
237
+41
| +21% | +$1.1K |
|
2828
PUT
Edgewell Personal Care
EPC
$1.27B
| $805K | ﹤0.01% |
233
+24
| +11% | +$779 |
|
2829
CALL
Omeros
OMER
$709M
| $805K | ﹤0.01% |
564
-449
| -44% | -$5.49K |
|
|
HAPN
2830
PUT
Happen Inc
HAPN
$2.08B
| $803K | ﹤0.01% |
762
+311
| +69% | +$2.08K |
|
2831
PUT
Rhythm Pharmaceuticals
RYTM
$7B
| $802K | ﹤0.01% |
270
+267
| +8,900% | +$6.79K |
|
2832
CALL
Starwood Property Trust
STWD
$6.12B
| $802K | ﹤0.01% |
416
+130
| +45% | +$2.21K |
|
2833
CALL
Standard BioTools
LAB
$326M
| $801K | ﹤0.01% |
1,336
+210
| +19% | +$1.38K |
|
2834
PUT
iShares 0-5 Year Investment Grade Corporate Bond ETF
SLQD
$2.36B
| $801K | ﹤0.01% |
210
+204
| +3,400% | +$10.6K |
|
2835
United States Gasoline Fund
UGA
$148M
| $801K | ﹤0.01% |
32,988
+9,655
| +41% | +$201K |
|
2836
PUT
Veru
VERU
$36.1M
| $800K | ﹤0.01% |
93
+85
| +1,063% | +$3.52K |
|
|
APLT
2837
DELISTED
Applied Therapeutics
APLT
| $799K | ﹤0.01% |
+36,322
| New | +$756K |
|
2838
LiveRamp
RAMP
$2.29B
| $799K | ﹤0.01% |
+10,920
| New | +$696K |
|
2839
CALL
Howard Hughes
HHH
$3.93B
| $797K | ﹤0.01% |
106
+69
| +186% | +$4.62K |
|
|
DRD
2840
PUT
DRDGold
DRD
$1.82B
| $796K | ﹤0.01% |
679
+84
| +14% | +$960 |
|
2841
ProShares Ultra Financials
UYG
$811M
| $796K | ﹤0.01% |
18,821
+1,999
| +12% | +$72.6K |
|
2842
PUT
Invesco CurrencyShares Japanese Yen Trust
FXY
$423M
| $795K | ﹤0.01% |
87
-242
| -74% | -$21.9K |
|
2843
Kinder Morgan
KMI
$73.1B
| $795K | ﹤0.01% |
58,177
+33,094
| +132% | +$443K |
|
|
ABB
2844
DELISTED
ABB Ltd
ABB
| $795K | ﹤0.01% |
28,462
+16,020
| +129% | +$427K |
|
2845
PUT
Revolve Group
RVLV
$1.79B
| $794K | ﹤0.01% |
255
+52
| +26% | +$1.16K |
|
|
CNR
2846
DELISTED
Cornerstone Building Brands, Inc.
CNR
| $794K | ﹤0.01% |
85,600
+37,184
| +77% | +$330K |
|
2847
CALL
WEX
WEX
$6.11B
| $793K | ﹤0.01% |
39
-204
| -84% | -$34.3K |
|
|
SAFM
2848
CALL
DELISTED
Sanderson Farms Inc
SAFM
| $793K | ﹤0.01% |
60
+39
| +186% | +$5.14K |
|
2849
CALL
Agios Pharmaceuticals
AGIO
$2.16B
| $792K | ﹤0.01% |
183
+160
| +696% | +$6.33K |
|
2850
Sony
SONY
$123B
| $792K | ﹤0.01% |
+39,215
| New | +$682K |
|
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.