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 |
Amazon
AMZN
|
+$170M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$71.3M |
| 3 |
AT&T
T
|
+$44.2M |
| 4 |
Meta Platforms (Facebook)
META
|
+$37.1M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$34.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Microsoft
MSFT
|
+$94.3M |
| 2 |
JPMorgan Chase
JPM
|
+$68.2M |
| 3 |
Citigroup
C
|
+$62.8M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$50.9M |
| 5 |
SPDR Gold Trust
GLD
|
+$46.3M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 0.38% |
| 2 | Technology | 0.35% |
| 3 | Communication Services | 0.24% |
| 4 | Healthcare | 0.2% |
| 5 | Consumer Staples | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
CANO
4076
DELISTED
Cano Health, Inc.
CANO
| $226K | ﹤0.01% |
1,657
+466
| +39% | +$158K |
|
|
TRTN
4077
DELISTED
Triton International Limited
TRTN
| $226K | ﹤0.01% |
3,298
-2,187
| -40% | -$138K |
|
4078
Charles River Laboratories
CRL
$11.5B
| $225K | ﹤0.01% |
1,035
+139
| +16% | +$30.4K |
|
4079
PUT
HDFC Bank
HDB
$123B
| $225K | ﹤0.01% |
6,600
-402,000
| -98% | -$13.1M |
|
4080
CALL
Inovio Pharmaceuticals
INO
$83.9M
| $225K | ﹤0.01% |
12,033
+1,925
| +19% | +$43.6K |
|
4081
CALL
Tyler Technologies
TYL
$14.2B
| $225K | ﹤0.01% |
700
+400
| +133% | +$131K |
|
|
4082
PUT
Tyler Technologies
TYL
$14.2B
| $225K | ﹤0.01% |
700
+500
| +250% | +$163K |
|
4083
PUT
Viper Energy
VNOM
$8.44B
| $225K | ﹤0.01% |
7,100
-10,600
| -60% | -$342K |
|
4084
CALL
Atomera
ATOM
$175M
| $224K | ﹤0.01% |
36,100
-40,200
| -53% | -$330K |
|
4085
CALL
Casey's General Stores
CASY
$32.6B
| $224K | ﹤0.01% |
1,000
-300
| -23% | -$68.3K |
|
|
4086
PUT
Casey's General Stores
CASY
$32.6B
| $224K | ﹤0.01% |
1,000
+100
| +11% | +$22.8K |
|
4087
CALL
Integra LifeSciences
IART
$1.39B
| $224K | ﹤0.01% |
+4,000
| New | +$204K |
|
4088
Stride
LRN
$4.14B
| $224K | ﹤0.01% |
7,178
-40,897
| -85% | -$1.5M |
|
4089
QuidelOrtho
QDEL
$1.13B
| $224K | ﹤0.01% |
+2,626
| New | +$222K |
|
4090
Republic Services
RSG
$68.3B
| $224K | ﹤0.01% |
1,739
+881
| +103% | +$118K |
|
4091
PUT
Revvity
RVTY
$12.4B
| $224K | ﹤0.01% |
1,600
-4,700
| -75% | -$632K |
|
4092
CALL
Tidewater
TDW
$3.61B
| $224K | ﹤0.01% |
6,100
+500
| +9% | +$15.2K |
|
4093
CALL
Tilly's
TLYS
$112M
| $224K | ﹤0.01% |
24,800
+14,600
| +143% | +$128K |
|
|
NVTA
4094
PUT
DELISTED
Invitae Corporation
NVTA
| $224K | ﹤0.01% |
120,700
-378,500
| -76% | -$924K |
|
|
CD
4095
DELISTED
Chindata Group Holdings Limited American Depositary Shares
CD
| $224K | ﹤0.01% |
+28,202
| New | +$198K |
|
4096
CALL
MarketAxess Holdings
MKTX
$4.42B
| $223K | ﹤0.01% |
800
-3,000
| -79% | -$772K |
|
4097
CALL
Treace Medical Concepts
TMCI
$261M
| $223K | ﹤0.01% |
9,700
-80,400
| -89% | -$1.85M |
|
4098
CALL
Beyond Air
XAIR
$3.89M
| $223K | ﹤0.01% |
86
-107
| -55% | -$274K |
|
|
QVCGA
4099
CALL
DELISTED
QVC Group Inc Series A
QVCGA
| $223K | ﹤0.01% |
2,748
-1,836
| -40% | -$187K |
|
4100
Concentrix
CNXC
$1.6B
| $221K | ﹤0.01% |
1,663
-4,462
| -73% | -$542K |
|
Similar funds
Simplex Trading's Q4 2022 Portfolio in Review
As of Q4 2022, Simplex Trading held 11,206 positions worth $91.9B, up 3.9% from $88.5B the previous quarter. Its ten largest holdings account for 34% of the portfolio.
Simplex Trading's Q4 2022 filing shows 1,219 new, 3,365 increased, 4,370 reduced and 1,942 closed positions. Its largest new stake was iShares MSCI Emerging Markets ETF: 932,756 shares worth $35.4M. The largest sale was Microsoft, an estimated $94.3M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 0.38% of assets, up from 0.3% a quarter earlier, followed by Technology and Communication Services.
- Simplex Trading's largest Q4 2022 buy was iShares MSCI Emerging Markets ETF: 932,756 shares worth $35.4M.
- Simplex Trading added most to Amazon in Q4 2022, an estimated $170M increase.
- Simplex Trading's biggest Q4 2022 reduction was Microsoft, cutting an estimated $94.3M.
- Simplex Trading fully exited JPMorgan Chase in Q4 2022, selling an estimated $68.2M.
- Simplex Trading's ten largest holdings make up 34% of its $91.9B portfolio in Q4 2022.
- Simplex Trading opened 1,219 new positions and closed 1,942 in Q4 2022.
- Simplex Trading's portfolio value rose 3.9% quarter-over-quarter to $91.9B.
Based on Simplex Trading's 13F filing for Q4 2022, filed 2 Feb 2023.