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 | |
|---|---|---|---|---|---|---|
1076
PUT
New Oriental
EDU
$7.85B
| $4.42M | 0.01% |
238
-4
| -2% | -$673 |
|
1077
CALL
Labcorp
LH
$23.9B
| $4.42M | 0.01% |
253
+77
| +44% | +$13.3K |
|
1078
Visa
V
$669B
| $4.41M | 0.01% |
20,168
-23,000
| -53% | -$4.71M |
|
1079
CALL
Corteva
CTVA
$59.4B
| $4.4M | 0.01% |
1,137
-176
| -13% | -$6.29K |
|
1080
State Street Energy Select Sector SPDR ETF
XLE
$39.3B
| $4.38M | 0.01% |
231,204
+167,894
| +265% | +$2.89M |
|
1081
CALL
Amphenol
APH
$194B
| $4.35M | 0.01% |
1,332
+120
| +10% | +$3.69K |
|
1082
ProShares UltraPro S&P 500
UPRO
$5.09B
| $4.35M | 0.01% |
113,104
-7,066
| -6% | -$233K |
|
|
TBHC
1083
PUT
DELISTED
The Brand House Collective
TBHC
| $4.34M | 0.01% |
2,427
+588
| +32% | +$8.03K |
|
1084
PUT
Novartis
NVS
$297B
| $4.33M | 0.01% |
459
-262
| -36% | -$22.9K |
|
1085
Fluor
FLR
$7.44B
| $4.32M | 0.01% |
270,271
+265,758
| +5,889% | +$3.76M |
|
1086
CALL
ResMed
RMD
$27.8B
| $4.31M | 0.01% |
203
-72
| -26% | -$14.4K |
|
|
1087
CALL
New Oriental
EDU
$7.85B
| $4.29M | 0.01% |
231
-120
| -34% | -$20.2K |
|
1088
CALL
ChargePoint
CHPT
$140M
| $4.29M | 0.01% |
+54
| New | +$27.1K |
|
1089
Colgate-Palmolive
CL
$72.1B
| $4.29M | 0.01% |
50,142
+12,313
| +33% | +$1.02M |
|
1090
CALL
The Mosaic Company
MOS
$7.08B
| $4.28M | 0.01% |
1,860
-911
| -33% | -$18.3K |
|
1091
KE Holdings
BEKE
$17.8B
| $4.28M | 0.01% |
69,529
+67,499
| +3,325% | +$4.49M |
|
1092
CALL
UWM Holdings
UWMC
$590M
| $4.28M | 0.01% |
+3,258
| New | +$34.1K |
|
1093
SPDR Gold Trust
GLD
$130B
| $4.27M | 0.01% |
23,955
-110,346
| -82% | -$19.4M |
|
1094
Novavax
NVAX
$1.29B
| $4.27M | 0.01% |
38,302
+8,102
| +27% | +$861K |
|
1095
CALL
HP
HPQ
$22.4B
| $4.26M | 0.01% |
1,733
+552
| +47% | +$11.6K |
|
1096
CALL
Hasbro
HAS
$12.4B
| $4.25M | 0.01% |
454
+250
| +123% | +$22.2K |
|
1097
PUT
Sempra
SRE
$61.1B
| $4.24M | 0.01% |
666
-50
| -7% | -$3.22K |
|
1098
PUT
BioNTech
BNTX
$23.3B
| $4.24M | 0.01% |
520
+386
| +288% | +$37.9K |
|
1099
PUT
FIVE9
FIVN
$1.67B
| $4.24M | 0.01% |
243
+22
| +10% | +$3.35K |
|
1100
PUT
Assurant
AIZ
$13.6B
| $4.24M | 0.01% |
311
-72
| -19% | -$9.32K |
|
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.