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 |
Pfizer
PFE
|
+$89.5M |
| 2 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$85.5M |
| 3 |
Boeing
BA
|
+$71M |
| 4 |
Intel
INTC
|
+$60.7M |
| 5 |
Meta Platforms (Facebook)
META
|
+$48.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$117M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$104M |
| 3 |
Alibaba
BABA
|
+$82.8M |
| 4 |
Walt Disney
DIS
|
+$68.5M |
| 5 |
Citigroup
C
|
+$59.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.38% |
| 2 | Healthcare | 0.27% |
| 3 | Consumer Discretionary | 0.25% |
| 4 | Industrials | 0.17% |
| 5 | Communication Services | 0.16% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
SCPH
5126
CALL
DELISTED
scPharmaceuticals
SCPH
| $153K | ﹤0.01% |
30,600
+13,200
| +76% | +$73.9K |
|
5127
PUT
Tanger
SKT
$4.67B
| $153K | ﹤0.01% |
5,200
-77,700
| -94% | -$2.18M |
|
5128
PUT
Ternium
TX
$9.67B
| $153K | ﹤0.01% |
3,700
-9,800
| -73% | -$388K |
|
|
VTNR
5129
DELISTED
Vertex Energy, Inc
VTNR
| $153K | ﹤0.01% |
109,374
+42,150
| +63% | +$67.2K |
|
|
CRESY
5130
PUT
Cresud
CRESY
$795M
| $152K | ﹤0.01% |
17,245
+9,379
| +119% | +$79.6K |
|
5131
GoPro
GPRO
$130M
| $152K | ﹤0.01% |
+68,446
| New | +$183K |
|
5132
Direxion Daily MSCI India Bull 2X ETF
INDL
$57.2M
| $152K | ﹤0.01% |
2,473
+1,695
| +218% | +$102K |
|
5133
CALL
Lands' End
LE
$370M
| $152K | ﹤0.01% |
14,000
+12,900
| +1,173% | +$118K |
|
5134
CALL
Markel Group
MKL
$23.3B
| $152K | ﹤0.01% |
100
-200
| -67% | -$293K |
|
5135
PUT
PDS Biotechnology
PDSB
$38.4M
| $152K | ﹤0.01% |
38,500
-19,900
| -34% | -$103K |
|
|
SFBS
5136
CALL
ServisFirst Bancshares
SFBS
$4.89B
| $152K | ﹤0.01% |
2,300
-6,900
| -75% | -$439K |
|
5137
PUT
Vertex
VERX
$2.09B
| $152K | ﹤0.01% |
4,800
+3,200
| +200% | +$86.3K |
|
5138
Weibo
WB
$2B
| $152K | ﹤0.01% |
16,803
-300,507
| -95% | -$2.73M |
|
5139
PUT
Wolverine World Wide
WWW
$1.61B
| $152K | ﹤0.01% |
13,600
+7,600
| +127% | +$70.4K |
|
|
AMRN
5140
CALL
Amarin Corp
AMRN
$298M
| $151K | ﹤0.01% |
8,480
-1,075
| -11% | -$22.9K |
|
5141
Bitdeer Technologies
BTDR
$2.56B
| $151K | ﹤0.01% |
+21,581
| New | +$158K |
|
|
DCBO
5142
CALL
Docebo
DCBO
$525M
| $151K | ﹤0.01% |
3,100
+3,000
| +3,000% | +$144K |
|
5143
4D Molecular Therapeutics
FDMT
$532M
| $151K | ﹤0.01% |
4,741
-6,369
| -57% | -$162K |
|
5144
PUT
Herc Holdings
HRI
$5.02B
| $151K | ﹤0.01% |
900
-2,600
| -74% | -$396K |
|
5145
Navigator Holdings
NVGS
$1.38B
| $151K | ﹤0.01% |
+9,854
| New | +$152K |
|
|
UCTT
5146
CALL
Ultra Clean Holdings
UCTT
$3.73B
| $151K | ﹤0.01% |
3,300
-2,200
| -40% | -$89.4K |
|
5147
CALL
Vitesse Energy
VTS
$651M
| $151K | ﹤0.01% |
6,400
+3,300
| +106% | +$72.4K |
|
5148
PUT
Amcor
AMCR
$20.8B
| $150K | ﹤0.01% |
3,160
+2,000
| +172% | +$93.6K |
|
|
BCTX
5149
CALL
Briacell Therapeutics
BCTX
$29.9M
| $150K | ﹤0.01% |
351
+230
| +190% | +$127K |
|
5150
iPath Bloomberg Commodity Index Total Return ETN due 12 June 2036
DJP
$800M
| $150K | ﹤0.01% |
+4,853
| New | +$147K |
|
Similar funds
Simplex Trading's Q1 2024 Portfolio in Review
As of Q1 2024, Simplex Trading held 10,366 positions worth $173B, up 11% from $156B the previous quarter. Its ten largest holdings account for 47% of the portfolio.
Simplex Trading's Q1 2024 filing shows 1,549 new, 3,675 increased, 3,484 reduced and 1,506 closed positions. Its largest new stake was Boeing: 345,653 shares worth $66.7M. The largest sale was NVIDIA, an estimated $117M.
By sector, the portfolio is most concentrated in Technology at 0.38% of assets, up from 0.33% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q1 2024 buy was Boeing: 345,653 shares worth $66.7M.
- Simplex Trading added most to Pfizer in Q1 2024, an estimated $89.5M increase.
- Simplex Trading's biggest Q1 2024 reduction was NVIDIA, cutting an estimated $117M.
- Simplex Trading fully exited Citigroup in Q1 2024, selling an estimated $59.8M.
- Simplex Trading's ten largest holdings make up 47% of its $173B portfolio in Q1 2024.
- Simplex Trading opened 1,549 new positions and closed 1,506 in Q1 2024.
- Simplex Trading's portfolio value rose 11% quarter-over-quarter to $173B.
Based on Simplex Trading's 13F filing for Q1 2024, filed 25 Apr 2024.