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 | |
|---|---|---|---|---|---|---|
1201
CALL
WIX.com
WIX
$2.12B
| $3.77M | ﹤0.01% |
151
-141
| -48% | -$37.1K |
|
|
AMRN
1202
CALL
Amarin Corp
AMRN
$286M
| $3.77M | ﹤0.01% |
386
+191
| +98% | +$18.4K |
|
1203
Direxion Daily Gold Miners Index Bull 2X ETF
NUGT
$884M
| $3.77M | ﹤0.01% |
54,298
+26,892
| +98% | +$2.04M |
|
|
PFPT
1204
PUT
DELISTED
Proofpoint, Inc.
PFPT
| $3.76M | ﹤0.01% |
276
+90
| +48% | +$9.87K |
|
1205
CALL
Futu Holdings
FUTU
$14B
| $3.76M | ﹤0.01% |
822
+808
| +5,771% | +$30.4K |
|
1206
CALL
Sunoco
SUN
$14.4B
| $3.75M | ﹤0.01% |
1,304
+693
| +113% | +$18.8K |
|
|
ANSS
1207
PUT
DELISTED
Ansys
ANSS
| $3.75M | ﹤0.01% |
103
-11
| -10% | -$3.68K |
|
|
SOHU
1208
PUT
Sohu.com
SOHU
$335M
| $3.75M | ﹤0.01% |
2,350
+1,217
| +107% | +$22.3K |
|
1209
CALL
Flex
FLEX
$44.2B
| $3.74M | ﹤0.01% |
2,759
+1,784
| +183% | +$20.6K |
|
1210
CALL
HDFC Bank
HDB
$121B
| $3.73M | ﹤0.01% |
1,034
+686
| +197% | +$21.9K |
|
1211
CALL
Cedar Fair
FUN
$1.78B
| $3.72M | ﹤0.01% |
946
+627
| +197% | +$20.8K |
|
1212
CALL
Sonos
SONO
$1.73B
| $3.72M | ﹤0.01% |
1,591
-326
| -17% | -$6.08K |
|
|
SHNY
1213
PUT
DELISTED
Direxion Daily Silver Miners Index Bull 2X Shares
SHNY
| $3.72M | ﹤0.01% |
5,491
-479
| -8% | -$324K |
|
1214
CALL
GDS Holdings
GDS
$6.4B
| $3.72M | ﹤0.01% |
397
-318
| -44% | -$28.2K |
|
1215
PUT
Weyerhaeuser
WY
$17.2B
| $3.71M | ﹤0.01% |
1,106
+917
| +485% | +$27.6K |
|
1216
CALL
Bloom Energy
BE
$57.5B
| $3.7M | ﹤0.01% |
1,291
+266
| +26% | +$5.68K |
|
1217
CALL
Magnite
MGNI
$2.65B
| $3.69M | ﹤0.01% |
1,202
+854
| +245% | +$12.9K |
|
|
SINA
1218
CALL
DELISTED
Sina Corp
SINA
| $3.68M | ﹤0.01% |
869
-559
| -39% | -$24K |
|
1219
CALL
Suncor Energy
SU
$78.2B
| $3.68M | ﹤0.01% |
2,193
+105
| +5% | +$1.54K |
|
1220
CALL
Tractor Supply
TSCO
$15.8B
| $3.67M | ﹤0.01% |
1,305
-690
| -35% | -$19.3K |
|
1221
CALL
BioNTech
BNTX
$22.6B
| $3.66M | ﹤0.01% |
449
+117
| +35% | +$11.5K |
|
1222
PUT
CME Group
CME
$91.1B
| $3.66M | ﹤0.01% |
201
-256
| -56% | -$43.5K |
|
1223
CALL
Spruce Power Holding Corp
SPRU
$42.1M
| $3.66M | ﹤0.01% |
+193
| New | +$20.8K |
|
|
LADR
1224
PUT
Ladder Capital
LADR
$1.24B
| $3.65M | ﹤0.01% |
3,737
+1,059
| +40% | +$8.99K |
|
1225
PUT
Lamb Weston
LW
$6.74B
| $3.65M | ﹤0.01% |
464
+455
| +5,056% | +$33.1K |
|
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.