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 | |
|---|---|---|---|---|---|---|
4126
PUT
Xponential Fitness
XPOF
$282M
| $237K | ﹤0.01% |
7,800
+4,000
| +105% | +$106K |
|
4127
CALL
AvePoint
AVPT
$2.74B
| $236K | ﹤0.01% |
57,300
-48,000
| -46% | -$217K |
|
4128
PUT
Highwoods Properties
HIW
$3.71B
| $236K | ﹤0.01% |
10,200
+10,100
| +10,100% | +$272K |
|
|
PPTA
4129
CALL
Perpetua Resources
PPTA
$2.18B
| $236K | ﹤0.01% |
53,200
+41,300
| +347% | +$143K |
|
4130
CALL
RxSight
RXST
$250M
| $236K | ﹤0.01% |
+14,200
| New | +$201K |
|
|
4131
Xponential Fitness
XPOF
$282M
| $236K | ﹤0.01% |
7,771
+5,666
| +269% | +$150K |
|
4132
CALL
Garrett Motion
GTX
$5.6B
| $235K | ﹤0.01% |
30,800
-13,200
| -30% | -$102K |
|
4133
iShares US Oil & Gas Exploration & Production ETF
IEO
$549M
| $235K | ﹤0.01% |
+2,748
| New | +$246K |
|
4134
Louisiana-Pacific
LPX
$5.35B
| $235K | ﹤0.01% |
4,337
-12,384
| -74% | -$758K |
|
4135
CALL
MSC Industrial Direct
MSM
$6.97B
| $235K | ﹤0.01% |
2,800
+1,600
| +133% | +$133K |
|
4136
CALL
OSI Systems
OSIS
$3.64B
| $235K | ﹤0.01% |
2,300
+400
| +21% | +$37K |
|
4137
PUT
RLX Technology
RLX
$2.43B
| $235K | ﹤0.01% |
81,100
-277,000
| -77% | -$672K |
|
4138
Rambus
RMBS
$9.49B
| $235K | ﹤0.01% |
4,591
-1,443
| -24% | -$62K |
|
4139
CALL
Rhythm Pharmaceuticals
RYTM
$7.41B
| $235K | ﹤0.01% |
13,200
+11,000
| +500% | +$276K |
|
|
SVM
4140
PUT
Silvercorp Metals
SVM
$2.08B
| $235K | ﹤0.01% |
61,600
+1,400
| +2% | +$4.61K |
|
4141
PUT
First Industrial Realty Trust
FR
$8.77B
| $234K | ﹤0.01% |
4,400
| – | – |
|
4142
AdvisorShares Ranger Equity Bear ETF
HDGE
$59.2M
| $234K | ﹤0.01% |
9,232
+8,644
| +1,470% | +$218K |
|
4143
Napco Security Technologies
NSSC
$1.33B
| $234K | ﹤0.01% |
6,253
+6,106
| +4,154% | +$195K |
|
|
4144
OSI Systems
OSIS
$3.64B
| $234K | ﹤0.01% |
+2,292
| New | +$212K |
|
4145
CALL
Progyny
PGNY
$2.41B
| $234K | ﹤0.01% |
7,300
-2,400
| -25% | -$79.3K |
|
|
SCPH
4146
CALL
DELISTED
scPharmaceuticals
SCPH
| $234K | ﹤0.01% |
25,800
+21,200
| +461% | +$155K |
|
|
SNBR
4147
PUT
DELISTED
Sleep Number
SNBR
| $234K | ﹤0.01% |
7,700
-1,900
| -20% | -$62.1K |
|
4148
PUT
Acadia Pharmaceuticals
ACAD
$4.45B
| $233K | ﹤0.01% |
12,400
-73,500
| -86% | -$1.4M |
|
4149
PUT
Bausch + Lomb
BLCO
$5.92B
| $233K | ﹤0.01% |
13,400
+11,800
| +738% | +$200K |
|
4150
PUT
Box
BOX
$4.36B
| $233K | ﹤0.01% |
8,700
-17,000
| -66% | -$512K |
|
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.