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 |
Walmart Inc
WMT
|
+$43.6M |
| 2 |
Apple
AAPL
|
+$40.9M |
| 3 |
VanEck Oil Services ETF
OIH
|
+$37.7M |
| 4 |
Citigroup
C
|
+$34.2M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$32.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$189M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$123M |
| 3 |
NVIDIA
NVDA
|
+$115M |
| 4 |
Tesla
TSLA
|
+$52M |
| 5 |
Meta Platforms (Facebook)
META
|
+$49M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.42% |
| 2 | Consumer Discretionary | 0.2% |
| 3 | Healthcare | 0.17% |
| 4 | Industrials | 0.15% |
| 5 | Communication Services | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
6026
PUT
Diana Shipping
DSX
$302M
| $45K | ﹤0.01% |
15,795
-12,410
| -44% | -$40.1K |
|
6027
PUT
Evolent Health
EVH
$348M
| $45K | ﹤0.01% |
1,400
-1,400
| -50% | -$44.3K |
|
6028
CALL
Heritage Insurance Holdings
HRTG
$889M
| $45K | ﹤0.01% |
+14,900
| New | +$38.8K |
|
6029
PUT
Hycroft Mining Holding Corp
HYMC
$1.82B
| $45K | ﹤0.01% |
10,530
-450
| -4% | -$2.19K |
|
|
JFIN
6030
PUT
Jiayin Group
JFIN
$113M
| $45K | ﹤0.01% |
12,300
+10,900
| +779% | +$34K |
|
6031
CALL
Koppers
KOP
$943M
| $45K | ﹤0.01% |
1,300
-300
| -19% | -$9.97K |
|
6032
Mayville Engineering Co
MEC
$654M
| $45K | ﹤0.01% |
3,045
-2,214
| -42% | -$32.3K |
|
6033
CALL
MaxLinear
MXL
$6.06B
| $45K | ﹤0.01% |
1,300
-4,700
| -78% | -$170K |
|
|
NINE
6034
DELISTED
Nine Energy Service
NINE
| $45K | ﹤0.01% |
8,179
-624
| -7% | -$6.45K |
|
6035
Odyssey Marine Exploration
OMEX
$34.9M
| $45K | ﹤0.01% |
14,131
+13,982
| +9,384% | +$44.9K |
|
6036
PUT
Red Robin
RRGB
$145M
| $45K | ﹤0.01% |
3,200
-24,600
| -88% | -$249K |
|
|
SHCO
6037
DELISTED
Soho House & Co
SHCO
| $45K | ﹤0.01% |
6,923
+5,715
| +473% | +$33.9K |
|
|
SKE
6038
CALL
Skeena Resources
SKE
$3.3B
| $45K | ﹤0.01% |
7,400
+1,700
| +30% | +$9.79K |
|
|
TGB
6039
Trekor Metals
TGB
$2.48B
| $45K | ﹤0.01% |
27,224
-30,510
| -53% | -$50.6K |
|
6040
CALL
Valaris
VAL
$5.48B
| $45K | ﹤0.01% |
700
-22,200
| -97% | -$1.55M |
|
6041
CALL
VirnetX Holding Corp
VHC
$54.4M
| $45K | ﹤0.01% |
1,725
+1,365
| +379% | +$44.2K |
|
6042
PUT
Vista Energy
VIST
$7.84B
| $45K | ﹤0.01% |
2,300
+1,800
| +360% | +$30.8K |
|
|
ZH
6043
PUT
Zhihu
ZH
$281M
| $45K | ﹤0.01% |
5,967
+4,984
| +507% | +$46.2K |
|
|
MORF
6044
PUT
DELISTED
Morphic Holding, Inc. Common Stock
MORF
| $45K | ﹤0.01% |
+1,200
| New | +$44.2K |
|
|
SDC
6045
PUT
DELISTED
SmileDirectClub, Inc. Class A Common Stock
SDC
| $45K | ﹤0.01% |
105,300
-3,800
| -3% | -$1.95K |
|
|
DSEY
6046
CALL
DELISTED
Diversey Holdings, Ltd. Ordinary Shares
DSEY
| $45K | ﹤0.01% |
+5,600
| New | +$35.5K |
|
6047
Advance Auto Parts
AAP
$3.35B
| $44K | ﹤0.01% |
363
-5,623
| -94% | -$787K |
|
6048
Barings BDC
BBDC
$864M
| $44K | ﹤0.01% |
+5,622
| New | +$47.2K |
|
6049
PUT
Black Hills Corp
BKH
$5.42B
| $44K | ﹤0.01% |
+700
| New | +$46.1K |
|
6050
Cytokinetics
CYTK
$10.5B
| $44K | ﹤0.01% |
+1,263
| New | +$51.5K |
|
Similar funds
Simplex Trading's Q1 2023 Portfolio in Review
As of Q1 2023, Simplex Trading held 10,803 positions worth $114B, up 24% from $91.9B the previous quarter. Its ten largest holdings account for 38% of the portfolio.
Simplex Trading deployed $10.1B of net new capital in Q1 2023, opening 1,536 new positions and adding to 3,665 existing holdings. Its largest new stake was Walmart Inc: 918,957 shares worth $45.2M.
By sector, the portfolio is most concentrated in Technology at 0.42% of assets, up from 0.35% a quarter earlier, followed by Consumer Discretionary and Healthcare.
On the sell side, the largest reduction was Meta Platforms (Facebook), an estimated $49M trimmed.
- Simplex Trading's largest Q1 2023 buy was Walmart Inc: 918,957 shares worth $45.2M.
- Simplex Trading added most to Apple in Q1 2023, an estimated $40.9M increase.
- Simplex Trading's biggest Q1 2023 reduction was Meta Platforms (Facebook), cutting an estimated $49M.
- Simplex Trading fully exited Amazon in Q1 2023, selling an estimated $189M.
- Simplex Trading's ten largest holdings make up 38% of its $114B portfolio in Q1 2023.
- Simplex Trading opened 1,536 new positions and closed 1,729 in Q1 2023.
- Simplex Trading's portfolio value rose 24% quarter-over-quarter to $114B.
Based on Simplex Trading's 13F filing for Q1 2023, filed 27 Apr 2023.