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 |
Microsoft
MSFT
|
+$114M |
| 2 |
NVIDIA
NVDA
|
+$85.9M |
| 3 |
Citigroup
C
|
+$61.5M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$45.5M |
| 5 |
Pfizer
PFE
|
+$41.6M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$467M |
| 2 |
Vanguard S&P 500 ETF
VOO
|
+$71.2M |
| 3 |
Meta Platforms (Facebook)
META
|
+$47.6M |
| 4 |
Intel
INTC
|
+$41.9M |
| 5 |
TSMC
TSM
|
+$35.9M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.51% |
| 2 | Financials | 0.35% |
| 3 | Consumer Discretionary | 0.3% |
| 4 | Healthcare | 0.25% |
| 5 | Industrials | 0.18% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
6126
PUT
Hallador Energy
HNRG
$704M
| $62K | ﹤0.01% |
11,100
+3,900
| +54% | +$24.8K |
|
6127
Heritage Insurance Holdings
HRTG
$915M
| $62K | ﹤0.01% |
27,766
+19,757
| +247% | +$52.9K |
|
6128
CALL
Hexcel
HXL
$7.73B
| $62K | ﹤0.01% |
1,200
-500
| -29% | -$29.1K |
|
6129
CALL
Information Services Group
III
$205M
| $62K | ﹤0.01% |
13,200
+2,800
| +27% | +$17.4K |
|
6130
CALL
Insmed
INSM
$21.3B
| $62K | ﹤0.01% |
2,900
-600
| -17% | -$14.4K |
|
6131
Photronics
PLAB
$1.85B
| $62K | ﹤0.01% |
4,265
-17,139
| -80% | -$337K |
|
6132
CALL
RB Global
RBA
$20.9B
| $62K | ﹤0.01% |
1,000
-78,500
| -99% | -$5.34M |
|
|
RGLS
6133
CALL
DELISTED
Regulus Therapeutics
RGLS
| $62K | ﹤0.01% |
36,500
+9,000
| +33% | +$16.2K |
|
6134
PUT
Repay Holdings
RPAY
$343M
| $62K | ﹤0.01% |
8,800
+5,200
| +144% | +$56.7K |
|
6135
CALL
Rackspace Technology
RXT
$1.21B
| $62K | ﹤0.01% |
15,400
+900
| +6% | +$5.22K |
|
6136
PUT
SPS Commerce
SPSC
$2.72B
| $62K | ﹤0.01% |
500
| – | – |
|
6137
CALL
Telefônica Brasil
VIV
$20.3B
| $62K | ﹤0.01% |
8,300
-6,300
| -43% | -$53.3K |
|
6138
PUT
WEC Energy
WEC
$35.6B
| $62K | ﹤0.01% |
700
-2,000
| -74% | -$204K |
|
6139
Werner Enterprises
WERN
$2.23B
| $62K | ﹤0.01% |
1,664
+120
| +8% | +$4.89K |
|
6140
PUT
Advanced Drainage Systems
WMS
$11.1B
| $62K | ﹤0.01% |
+500
| New | +$62.2K |
|
6141
Wintrust Financial
WTFC
$10.9B
| $62K | ﹤0.01% |
761
-2,117
| -74% | -$180K |
|
|
WW
6142
DELISTED
WW International
WW
| $62K | ﹤0.01% |
15,795
+4,956
| +46% | +$30K |
|
|
CALT
6143
CALL
DELISTED
Calliditas Therapeutics AB American Depositary Shares
CALT
| $62K | ﹤0.01% |
4,100
+3,900
| +1,950% | +$67.9K |
|
|
BTTX
6144
CALL
DELISTED
Better Therapeutics, Inc. Common Stock
BTTX
| $62K | ﹤0.01% |
35,300
+4,400
| +14% | +$8.03K |
|
|
AERI
6145
DELISTED
Aerie Pharmaceuticals
AERI
| $62K | ﹤0.01% |
+4,120
| New | +$47.9K |
|
|
AFMD
6146
DELISTED
Affimed
AFMD
| $61K | ﹤0.01% |
3,003
+980
| +48% | +$27.2K |
|
6147
PUT
Amphastar Pharmaceuticals
AMPH
$892M
| $61K | ﹤0.01% |
+2,200
| New | +$71.8K |
|
6148
Smartbird Inc
BIRD
$19.8M
| $61K | ﹤0.01% |
1,011
-1,702
| -63% | -$150K |
|
6149
PUT
Brookdale Senior Living
BKD
$3.43B
| $61K | ﹤0.01% |
14,300
-44,700
| -76% | -$212K |
|
6150
PUT
CareTrust REIT
CTRE
$9.74B
| $61K | ﹤0.01% |
3,400
+300
| +10% | +$6.11K |
|
Similar funds
Simplex Trading's Q3 2022 Portfolio in Review
As of Q3 2022, Simplex Trading held 11,570 positions worth $88.5B, down 6% from $94.1B the previous quarter. Its ten largest holdings account for 38% of the portfolio.
Simplex Trading's Q3 2022 filing shows 1,564 new, 4,281 increased, 3,851 reduced and 1,575 closed positions. Its largest new stake was Microsoft: 432,062 shares worth $101M. The largest sale was Apple, an estimated $467M.
By sector, the portfolio is most concentrated in Technology at 0.51% of assets, down from 0.84% a quarter earlier, followed by Financials and Consumer Discretionary.
- Simplex Trading's largest Q3 2022 buy was Microsoft: 432,062 shares worth $101M.
- Simplex Trading added most to NVIDIA in Q3 2022, an estimated $85.9M increase.
- Simplex Trading's biggest Q3 2022 reduction was Apple, cutting an estimated $467M.
- Simplex Trading fully exited iShares Core S&P 500 ETF in Q3 2022, selling an estimated $34.3M.
- Simplex Trading's ten largest holdings make up 38% of its $88.5B portfolio in Q3 2022.
- Simplex Trading opened 1,564 new positions and closed 1,575 in Q3 2022.
- Simplex Trading's portfolio value fell 6% quarter-over-quarter to $88.5B.
Based on Simplex Trading's 13F filing for Q3 2022, filed 4 Nov 2022.